Illinois real estate exam glossary
Amortization
Part of a mortgage payment pays interest. The part applied to principal reduces the debt. Amortization describes that repayment process, but a loan can reduce principal without paying the entire balance by maturity. Start with one payment before trying to read the whole schedule.
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The short answer
Mortgage amortization is the scheduled repayment of principal over time. On a typical fully amortizing, fixed-rate loan with level principal-and-interest payments, the interest portion falls and the principal portion rises as the balance is repaid. Full amortization pays the scheduled balance by maturity; partial amortization leaves a balance due. Negative amortization adds unpaid interest to principal instead of reducing it.
PSI’s June 24, 2026 national outline includes amortized, partially amortized and interest-only loans under Financing. The whole Financing area accounts for 10% of the 100 scored national questions, not ten questions about this term. Examples here are original teaching problems, not PSI items or a validated readiness test. Their stated monthly assumptions do not replace a real note or servicing history.
Work one payment, then follow the balance
- Identify the model. Find the beginning unpaid principal, annual note rate, payment frequency, principal-and-interest payment and relevant dates. For the simplified examples here, use one full month, an end-of-period payment and no fees, advances, extra payments or other balance changes unless expressly supplied. Actual contracts can use different day-count and payment rules.
- Calculate that period’s interest. In this stated monthly model, multiply the beginning balance by the annual note rate divided by twelve. Six percent becomes 0.06 annually and 0.005 monthly. Use the note rate, not APR, and do not multiply a monthly payment by the whole annual rate.
- Separate principal from the collection. Subtract the period’s interest from the P&I payment to find principal reduction in the ordinary example. Do not use total PITI, mortgage insurance, an escrow contribution or association dues as if all those dollars paid principal. Fees and an actual servicing allocation need their own treatment.
- Carry the balance forward. Subtract principal reduction from the beginning balance. That ending principal becomes the next period’s beginning principal. Do not subtract the whole P&I payment again. State the rounding convention; an actual cent-rounded schedule can need a slightly adjusted final payment.
- Classify what happens. Payment above accrued interest can reduce principal. A payment covering only all accrued interest leaves it level if no other amounts are added. A permitted payment below interest creates negative amortization only when the unpaid interest is actually added to principal. An ordinary partial payment is not automatically an authorised negative-amortization option.
- Check maturity separately. A loan can amortize during a short term without reaching zero by its maturity date. A longer payment-calculation period can leave a balloon. A future sale, refinance or extension is not guaranteed, and any actual payoff must still be funded or a lawful change agreed. Maturity is different from acceleration after a default.
- Qualify a level-payment statement. The familiar declining-interest, increasing-principal pattern assumes a positive fixed rate, level P&I, regular payments and no other changes. Not every amortizing loan has level payments. An ARM can amortize, but rate adjustments and its payment terms can produce a new allocation or schedule.
- Check extra principal and payment changes. Use amounts actually applied to principal under the contract and applicable rules. A voluntary principal-curtailment recast is not automatic; eligibility and approval matter. An ARM’s required payment recast or an interest-only transition is a different event. Do not invent a universal minimum lump sum, fee or right to a lower payment.
- Use the right record. The note supplies the obligation; the schedule models it; the transaction history and applicable statements show actual application; and a dated payoff quote supplies the amount needed to satisfy the debt. A projected zero balance does not prove payment, and an old schedule does not itself clear the public mortgage record.
| Supplied payment result | Principal effect | What to check |
|---|---|---|
| P&I exceeds accrued interest | Principal falls by the amount applied to it | Exclude escrow and other separate amounts |
| Payment covers all interest only | Principal stays level if nothing else is added | Not the same as negative amortization |
| Payment is below interest and the shortfall is capitalized | Principal increases | Capitalization must be supplied; not every short payment does this |
| Scheduled balance reaches zero by maturity | Fully amortizing on the stated assumptions | Not proof that the loan has already been paid |
| Principal falls but a balance remains at maturity | Partially amortizing, with a balloon due | The payment-calculation period and term differ |
| Properly applied extra principal | Balance falls sooner | Required payment does not automatically change |
| Approved voluntary recast | Existing balance is re-amortized on its approved terms | Different from refinancing with a new loan |
| Total collection changes because escrow changes | No automatic change in the scheduled P&I | A fixed rate does not freeze taxes and insurance |
The distinctions that matter
| Distinction | How it works | What to notice |
|---|---|---|
| Principal and interest | Principal is debt owed; interest is the charge for its use. Only the amount applied to principal directly reduces that balance. | Do not subtract the entire payment from principal. |
| P&I and total collection | Principal and interest are only part of many monthly payments. Taxes, insurance, mortgage insurance and other required amounts may be collected too. | Separate the amortizing payment from escrow and insurance. |
| Full and partial amortization | A fully amortizing schedule repays the scheduled balance by maturity if performed as required. A partially amortizing loan reduces principal but leaves an amount due at maturity. | A declining balance does not, by itself, rule out a balloon. |
| Amortization period and term | The amortization period is used to calculate repayment. The term ends at the note’s maturity date; it can be shorter. | Thirty-year payment calculation with five-year maturity is not thirty years to pay. |
| Interest-only and negative amortization | Paying all accrued interest with no other balance additions leaves principal level. If unpaid interest is added to principal, the balance grows. | Zero principal reduction and increasing principal are different results. |
| Note rate and APR | The note rate determines interest under the contract. APR is a broader cost-of-credit disclosure that can include specified charges. | Use the note rate in the stated payment calculation, not APR. |
| A forecast and account history | An amortization schedule projects amounts under assumptions. The servicing history records actual payment application and account activity. | A scheduled balance is not automatically the actual balance or payoff. |
| Extra principal and a recast | Properly applied extra principal reduces the debt sooner. A voluntary recast changes the required payment under its approved terms. | A lower balance does not automatically lower the next required payment. |
| Recast and refinance | A recast recalculates payments on the existing loan. A refinance replaces the existing debt with a new loan. | Recalculation does not guarantee a new rate or a new loan approval. |
| Amortization and equity | Principal reduction affects one debt balance. Equity also depends on property value and other claims against it. | Paying interest, escrow or insurance is not principal repayment. |
| Amortization and depreciation | Here, amortization concerns debt repayment. Appraisal depreciation concerns a loss in value; tax cost recovery has its own rules. | Identify which field the question is asking about. |
Work through the facts
Split one monthly payment
In this simplified monthly problem, beginning principal is $240,000, the annual note rate is 6%, and P&I is $1,500. No other amounts or balance changes apply.
- Monthly interest is $240,000 x 0.06 / 12 = $1,200.
- Subtract interest from P&I: $1,500 - $1,200 = $300. Subtract only $300 from the balance.
Answer: $1,200 interest, $300 principal and $239,700 ending principal.
The same payment can reduce more principal later
In a separate row of the same simplified fixed-rate model, beginning principal is $180,000, the annual rate is 6% and P&I remains $1,500. No other changes apply.
- The lower balance produces $180,000 x 0.06 / 12 = $900 interest.
- The $1,500 payment has not changed, but its allocation has. This is not a claim that the balance reached $180,000 immediately after the first example.
Answer: $900 interest, $600 principal and $179,400 ending principal.
Separate debt repayment from the total collection
The monthly amounts are $1,450 P&I, $480 tax escrow, $140 homeowners-insurance escrow and $85 mortgage insurance. No other items are supplied.
- Tax and homeowners-insurance escrow add $620 to P&I.
- The separate $85 mortgage insurance increases the total, not the principal portion. The entire $1,450 is not principal either.
Answer: P&I is $1,450; PITI is $2,070; the total supplied collection is $2,155.
Thirty-year calculation, seven-year maturity
A positive-rate loan’s scheduled payments are calculated over thirty years, but the note requires its remaining balance at the end of year seven. Assume no extra principal or agreed modification.
- The ordinary scheduled payments were not calculated to repay the balance within seven years.
- A sale, refinance or extension is not guaranteed. A sale alone does not cancel the debt without the required payoff or other lawful resolution.
Answer: Partial amortization during the term, with the remaining balance due as a balloon.
Interest-only does not itself increase principal
Interest due for the month is $1,050. The permitted payment covers exactly that full $1,050, and no other amounts are added to principal.
- There is no payment left for principal reduction.
- There is also no unpaid interest to capitalize in these facts; later payment or maturity terms still matter.
Answer: Principal stays level during this supplied interest-only period.
A permitted payment can leave a growing balance
Accrued interest is $1,100. The loan expressly permits an $850 payment and adds the unpaid $250 to principal. No other change applies.
- Subtract the payment from accrued interest: $1,100 - $850 = $250.
- The question expressly supplies capitalization. This is not permission to underpay a different loan or assume every short payment is treated this way.
Answer: $250 of negative amortization for the period.
An extra $10,000 is not an automatic payment reduction
After required payments, a $10,000 extra amount is actually applied to principal. Assume a current loan, unchanged positive fixed rate and required payment, and no recast or other change.
- With less principal, later interest in the stated model is lower and the existing payment can repay the debt sooner.
- A voluntary recast has separate eligibility and approval conditions. This example does not assume a universal recast right or fee.
Answer: Principal falls by the stated $10,000; the required payment is not automatically reduced.
Compare two repayment periods fairly
These invented mathematical loans both start at $100,000, have a fixed 6% note rate, monthly end-of-period payments and no fees or other changes. One fully amortizes over thirty years; the other over fifteen.
- Use the same balance, positive rate and payment frequency when comparing periods.
- The full-precision formula gives about $115,838.19 interest over thirty years versus $51,894.23 over fifteen. Displayed payments are rounded; a cent-rounded ledger and adjusted final payment can differ slightly. These are teaching inputs, not current mortgage quotes.
Answer: Approximate P&I is $599.55 for thirty years and $843.86 for fifteen. The shorter schedule has less total scheduled interest.
Carry the ending balance into the next row
Continue the first example using beginning principal $239,700, a 6% annual note rate and $1,500 P&I for another full month. No other amounts apply; round this row’s dollar amounts to cents.
- Multiply $239,700 by 0.005, not the original $240,000 by that rate again.
- Subtract $1,198.50 from $1,500, then subtract $301.50 from $239,700. The end balance is not reduced by the full payment.
Answer: $1,198.50 interest, $301.50 principal and $239,398.50 ending principal.
An amortizing loan need not have level P&I
A simplified $12,000 loan at a fixed 6% annual rate requires $1,000 principal each month plus that month’s interest on beginning principal. Monthly accrual applies, with no other changes.
- First-month interest is $12,000 x 0.06 / 12 = $60; ending principal is $11,000.
- Second-month interest is $11,000 x 0.06 / 12 = $55. Add the unchanged $1,000 principal payment; this differs from level-P&I amortization.
Answer: First P&I is $1,060; second P&I is $1,055. Principal is amortizing while the combined payment declines.
Mistakes to avoid
- Subtract the whole payment from principal. First identify interest and separate escrow or other amounts. Only principal applied reduces the principal balance.
- A fixed payment means fixed principal and fixed interest portions. Under the ordinary positive-rate, level-P&I model, the allocation changes as the balance falls.
- Every amortizing loan is fully amortizing by maturity. Partial amortization can still leave a balloon.
- Interest-only is always negative amortization. Full interest payment with no balance additions leaves principal level.
- Any short payment is an authorised payment option. The contract must permit the option, and capitalization must actually occur for the supplied negative-amortization result.
- Use APR divided by twelve for note interest. Use the contractual note rate in the stated model. APR includes its defined cost components.
- Extra principal automatically lowers the next bill. The required payment does not automatically change; a voluntary recast is a separate approved process.
- A longer period always means less cost. At the same positive fixed rate and principal, lower payments over a longer fully performed schedule generally mean more total interest.
- The original schedule is the current payoff. A schedule is a forecast; a dated payoff can include accrued interest and other authorized amounts.
- Scheduled zero balance proves a released mortgage record. A forecast is not proof of actual payment or the completed authorized record-clearance process.
24 questions on mortgage repayment and payment allocation
These are original teaching questions, not recalled or predicted PSI questions. Answer first, then explain why the other choices fail.
1. On an ordinary fully amortizing loan with a positive fixed rate, level P&I, regular payments and no other changes, how does the interest portion early in the schedule compare with later?
- The interest portion must remain constant
- Every early payment is entirely principal
- The balance necessarily rises after every payment
- It is larger early, while the principal portion becomes larger later
Show answer and explanation
Answer: D. It is larger early, while the principal portion becomes larger later
Interest in the stated model is based on the outstanding principal. As that balance falls, less of the level payment is needed for interest and more remains for principal.
2. Beginning principal is $180,000, the annual note rate is 6%, and monthly P&I is $1,200. With the supplied simplified monthly model and no other amounts, what principal is paid?
- $300
- $1,200
- $1,800
- $900
Show answer and explanation
Answer: A. $300
Interest is $180,000 x 0.06 / 12 = $900. Subtract that from the $1,200 P&I payment to obtain $300 principal reduction.
3. A positive-rate loan uses thirty-year amortization payments but requires the unpaid balance at five-year maturity. No prepayment or change is supplied. What should you recognise?
- A guaranteed five-year refinancing
- Automatic forgiveness of the unpaid balance
- A fully amortizing five-year schedule
- A balloon structure
Show answer and explanation
Answer: D. A balloon structure
The payment-calculation period exceeds the term, so scheduled payments leave principal due at maturity. A new loan or extension is not guaranteed.
4. Accrued interest is $950 and the permitted payment covers exactly $950. No other amounts are added to principal. What happens to principal?
- It increases by $950
- It decreases by $950
- It stays level
- It is automatically forgiven
Show answer and explanation
Answer: C. It stays level
The entire supplied payment covers interest. No principal is repaid and no unpaid interest is added, so these facts are interest-only rather than negative amortization.
5. Accrued interest is $1,000, the loan permits an $800 payment, and it adds the unpaid $200 to principal. What is this result?
- A tax escrow deposit
- Negative amortization
- Positive principal amortization
- A principal curtailment
Show answer and explanation
Answer: B. Negative amortization
The expressly capitalized interest shortfall grows principal. A short payment on a different loan is not automatically a permitted payment option or automatically capitalized.
6. Which component directly reduces the unpaid principal balance in an ordinary payment?
- Homeowners-insurance escrow
- The interest portion
- Property-tax escrow
- The principal portion
Show answer and explanation
Answer: D. The principal portion
Interest is the charge for credit. Escrow and insurance address separate costs. Only the amount applied to principal reduces that debt balance.
7. Hold principal, a positive fixed rate and monthly frequency constant, with both loans fully paid as scheduled and no other charges. What generally follows from shorter amortization?
- Higher P&I and less total scheduled interest
- Automatic mortgage insurance cancellation
- No change in the number of payment periods
- Lower P&I and more total scheduled interest
Show answer and explanation
Answer: A. Higher P&I and less total scheduled interest
Faster repayment requires larger payments but leaves the debt outstanding for fewer periods. The positive-rate and otherwise equal assumptions matter; this is not a comparison of different loan offers.
8. A current loan receives an extra principal amount properly applied to the balance. No recast or other change is agreed. What is the sound conclusion?
- The public mortgage record is automatically cleared
- The balance falls, but the required payment does not automatically fall
- The next required P&I always decreases by the extra amount
- The interest rate automatically decreases
Show answer and explanation
Answer: B. The balance falls, but the required payment does not automatically fall
Principal curtailment changes the balance. A voluntary payment recast has its own eligible-loan and approval requirements; it is not automatic.
9. Which document is a projection rather than the actual record of credited payments?
- A dated record of actual payments received
- An actual ledger of posted account adjustments
- An original amortization schedule
- A servicer’s transaction history
Show answer and explanation
Answer: C. An original amortization schedule
A schedule assumes future performance. Extra payments, modifications, rate changes and other actual events can produce a different account history.
10. Why can a dated payoff exceed the current unpaid principal balance?
- The borrower must always pay all originally projected lifetime interest
- A payoff can never include principal
- Escrow always doubles the principal
- It can include interest through the payoff date and other authorized amounts
Show answer and explanation
Answer: D. It can include interest through the payoff date and other authorized amounts
A payoff addresses satisfaction as of a date, not merely the remaining principal. Do not assume every fee or penalty is authorized, or that every projected future interest dollar remains due.
11. In the stated full-month model, beginning principal is $240,000 and the annual note rate is 6%. What is the monthly interest?
- $14,400
- $1,500
- $120
- $1,200
Show answer and explanation
Answer: D. $1,200
Convert 6% to 0.06 and divide by twelve: $240,000 x 0.06 / 12 = $1,200. The period and contractual rate must match.
12. In the same simplified row, P&I is $1,500 and interest is $1,200. Beginning principal is $240,000. What is ending principal?
- $239,700
- $241,200
- $238,500
- $240,300
Show answer and explanation
Answer: A. $239,700
Principal reduction is $300, not the full $1,500 collection. Subtract $300 from the beginning balance; do not subtract the interest twice.
13. P&I is $1,450, tax escrow $480, homeowners-insurance escrow $140 and mortgage insurance $85. No other items apply. What is the total collection?
- $2,070
- $2,155
- $2,240
- $1,450
Show answer and explanation
Answer: B. $2,155
Add $1,450 + $480 + $140 + $85 = $2,155. PITI alone is $2,070 here; the $85 mortgage insurance is an additional supplied item, not principal repayment.
14. Which rate belongs in the supplied note-interest calculation?
- APR automatically in every case
- The property-tax assessment ratio
- The capitalization rate from an appraisal
- The contractual note rate
Show answer and explanation
Answer: D. The contractual note rate
APR measures the defined broader borrowing cost and is not automatically the contractual periodic interest rate. Follow the stated note and accrual assumptions.
15. Can an adjustable-rate mortgage amortize?
- Every ARM necessarily has negative amortization
- Every ARM keeps the same rate for its whole term
- No ARM can ever reduce principal
- Yes; its rate and payment terms determine its schedule and any recalculation
Show answer and explanation
Answer: D. Yes; its rate and payment terms determine its schedule and any recalculation
Adjustable rate and principal repayment are separate characteristics. A rate change can require a new allocation or payment calculation under the actual contract.
16. Which comparison correctly distinguishes a voluntary principal-curtailment recast from refinancing?
- Every recast issues an entirely new loan at a lower rate
- A refinance never pays an existing debt
- Both automatically guarantee approval and fee-free processing
- A recast recalculates the existing loan; refinancing replaces it with a new loan
Show answer and explanation
Answer: D. A recast recalculates the existing loan; refinancing replaces it with a new loan
Do not promise eligibility, a lower rate or a universal charge. A loan’s required ARM or interest-only payment transition is also different from a voluntary curtailment recast.
17. Can a fixed-rate loan’s total monthly collection change while its scheduled P&I stays level?
- No; a fixed rate freezes every housing expense
- Yes; taxes are automatically added to principal every month
- Yes; escrow, insurance or other applicable collection items can change
- No; mortgage insurance is always part of principal
Show answer and explanation
Answer: C. Yes; escrow, insurance or other applicable collection items can change
Separate the debt-payment schedule from the total collection. Taxes and insurance can change without changing the note rate or scheduled P&I.
18. A model starts at $200,000 and expressly adds $250 of unpaid interest to principal. There are no other changes. What is the new principal?
- $200,000
- $199,750
- $250
- $200,250
Show answer and explanation
Answer: D. $200,250
The question supplies capitalization, so add the unpaid interest to the balance. This is different from ordinary principal reduction or a partial payment merely held unapplied.
19. What does fully amortizing mean in the ordinary stated schedule?
- The total collection excludes every tax and insurance charge
- No actual contract can ever have a modified payment
- Scheduled payments repay the scheduled balance by maturity if made as required
- The borrower has already paid the entire debt
Show answer and explanation
Answer: C. Scheduled payments repay the scheduled balance by maturity if made as required
The description concerns a repayment design and its assumptions. It does not prove past payment, a completed payoff or a recorded release.
20. Does a schedule projecting zero principal prove that the mortgage has actually been paid and its public record cleared?
- Yes; actual account activity can be ignored
- Yes; a forecast automatically records a satisfaction
- Yes; the printed table itself is a mortgage release
- No; actual payment and the authorized record-clearance evidence must be checked
Show answer and explanation
Answer: D. No; actual payment and the authorized record-clearance evidence must be checked
A projection, debt satisfaction and record clearance are separate matters. Do not infer an unpaid legal lien solely from record lag after actual full payment either.
21. A simplified positive fixed-rate loan repays equal principal amounts each month, with interest on the declining beginning balance added separately. Must its combined P&I payment stay level?
- Yes; every amortizing loan must have level P&I
- No; equal principal repayment automatically means negative amortization
- No; P&I can decline even though principal is amortizing
- Yes; the interest portion is necessarily unchanged
Show answer and explanation
Answer: C. No; P&I can decline even though principal is amortizing
Level P&I is one repayment design, not the definition of all amortization. The supplied equal-principal model reduces the interest charge as its balance falls, so the combined payment can decline.
22. A fee-free $12,000 loan has a zero interest rate and twelve equal monthly principal payments, with no other amounts. What is each payment?
- $60
- $1,000
- $12,000
- $1,060
Show answer and explanation
Answer: B. $1,000
At zero interest, divide principal by the number of payments: $12,000 / 12 = $1,000. No interest is created by this schedule, so a shorter zero-rate schedule would not save interest that was never charged.
23. The next simplified monthly row starts at $239,700, uses a 6% annual note rate and $1,500 P&I, with no other changes. What principal is paid in that row?
- $1,198.50
- $301.50
- $1,500
- $300
Show answer and explanation
Answer: B. $301.50
Interest is $239,700 x 0.06 / 12 = $1,198.50. Subtract from $1,500 to obtain $301.50 principal; ending principal is $239,398.50.
24. A borrower sends less than the covered loan’s periodic P&I and applicable escrow. No permitted capitalization option or actual principal application is supplied. Can you assume that payment immediately reduced principal?
- No; check the contract, applicable rules and actual crediting or unapplied-funds treatment
- Yes; a partial payment always eliminates the next due date
- Yes; every dollar sent immediately becomes principal
- Yes; every short payment is automatically authorized negative amortization
Show answer and explanation
Answer: A. No; check the contract, applicable rules and actual crediting or unapplied-funds treatment
Under the scoped payment-processing rule, a partial payment may be credited, returned or held subject to the legal obligation and applicable law. Held funds must be treated as a periodic payment when enough accumulates. Do not assume facts about a private account.
Common questions
What does amortization mean in real estate?
Here it means scheduled repayment of mortgage principal over time. On a typical fully amortizing loan with a positive fixed rate and level P&I, each required payment covers that period’s interest and repays some principal. The schedule reaches its target zero balance by maturity if performed as required.
An amortizing loan can also reduce principal only partly before maturity. That is why amortization and full amortization are not interchangeable. This debt meaning is different from appraisal depreciation or tax cost-recovery terminology.
Why is more of the payment interest at the beginning?
In the ordinary positive-rate, level-payment model, interest is calculated on a larger outstanding balance early. As principal is repaid, the same rate produces less interest, leaving more of the unchanged P&I payment for principal.
This is not a statement that the lender collects every lifetime interest dollar in advance, or that all amortizing loans must have level payments. Different repayment patterns, rate changes and account events need their own analysis.
How do I split one monthly payment?
For the simplified full-month model, interest equals beginning principal x annual note rate / 12. Principal reduction equals the P&I payment minus that interest. Ending principal equals beginning principal minus the reduction. Use the stated period and note rate, and keep other amounts separate.
At $240,000, 6% annually and $1,500 P&I, monthly interest is $1,200, principal reduction is $300 and ending principal is $239,700. A real loan’s day count, payment dates, fees and application rules may differ from this teaching model.
What does an amortization schedule show, and how should I round?
A schedule projects payment dates or numbers, beginning balance, interest, principal and ending balance under stated assumptions. It is not the actual account ledger. Extra principal, late or partial payments, advances, rate adjustments and modifications can change the result.
Follow the problem’s rounding instruction. Carry sufficient precision through intermediate work unless it requires a cent-rounded row. A payment displayed to cents may produce a slightly adjusted last payment; do not declare a loan unpaid solely because an independently rounded table leaves a few cents.
How are fully amortizing, partially amortizing and balloon loans different?
Fully amortizing scheduled payments are designed to pay the scheduled balance by maturity when made as required. A partially amortizing loan reduces principal during its term but leaves a balance due at maturity. That remaining large payment is a balloon.
A fixed rate does not by itself rule out a balloon. Nor does an intention to sell or refinance guarantee funds will be available when it is due. Read the actual maturity and payment terms rather than assuming a new loan, extension or forgiveness.
What is the difference between the term and amortization period?
The term ends at contractual maturity. The amortization period is the time used to calculate scheduled repayment. They can match, as in a conventional example with thirty-year payments and thirty-year maturity, or differ.
Payments calculated over thirty years with a five-year maturity do not provide thirty years before the remaining debt is due. Maturity is also different from acceleration following a default or an earlier voluntary payoff.
Is interest-only the same as negative amortization?
No. Paying all accrued interest, with no other principal additions, leaves the principal balance level during that period. Negative amortization occurs when unpaid interest is actually added to principal, making it grow. A permitted $850 payment against $1,100 interest with the $250 shortfall capitalized illustrates that distinction.
The word permitted matters. Making a short payment on an ordinary loan is not automatically an authorised option, and unpaid amounts are not automatically capitalized. Later interest-only or negative-amortization transitions can produce larger payments or a maturity balance under their terms.
Is P&I the same as PITI or my total payment?
No. P&I contains principal and interest. PITI adds property taxes and insurance; the total collected can also include mortgage insurance and other applicable amounts. Association dues are often paid separately. None of those labels means the whole collection is applied to principal.
In the supplied example, $1,450 P&I plus $480 tax escrow and $140 homeowners-insurance escrow equals $2,070 PITI. Add $85 mortgage insurance to get $2,155 total. An escrow change can alter the total bill without changing the scheduled P&I or note rate.
Do extra principal payments automatically lower the monthly payment?
No. A properly applied principal curtailment lowers the balance. Under an unchanged positive-rate schedule, keeping the same required payment generally reduces later interest and can bring payoff forward. It does not automatically rewrite the next required payment.
A voluntary recast is a separate approved recalculation for an eligible loan. The published Form 3200 specifically says a partial prepayment does not change the payment amount or due date unless the note holder agrees in writing. Its terms are not proof that every mortgage uses that form or has the same prepayment conditions.
Does a shorter amortization period save interest?
For otherwise equal loans with the same principal, positive fixed rate and payment frequency, fully paid as scheduled without other changes, shorter amortization generally means larger P&I payments and less total interest. More principal is repaid sooner.
The rate and other assumptions matter. Different fees, rates, prepayments or loan terms make a different comparison. At a zero interest rate, neither otherwise identical schedule generates interest; a shorter period still requires faster principal repayment.
How do APR and adjustable rates affect the calculation?
Use the contractual note rate, not APR, for the stated interest calculation. APR is a broader disclosed borrowing-cost measure that includes its defined charges; it is not simply another name for the note rate. An ARM’s APR is not its maximum possible interest rate.
An ARM can amortize. Its rate, caps, payment rules, remaining balance and term determine whether and how payments are recalculated. A payment cap and an interest-rate cap are different controls; do not assume every ARM has negative amortization or that every change leaves P&I level.
Why is the payoff different from the balance on my schedule?
A schedule is a projection. The actual unpaid principal depends on credited activity, while a dated payoff includes the amounts authorized to satisfy the debt as of its stated date, which can include accrued interest and other permitted amounts. It is not automatically all originally projected future interest.
Use actual note and servicing records for a real account. Do not automatically subtract an escrow balance from a payoff without the actual treatment being established. A projected last payment is not proof of actual full payment or completed mortgage record clearance.
Is a recast the same as refinancing?
A voluntary principal-curtailment recast re-amortizes the existing loan on approved terms, rather than replacing it with a new loan. Refinancing uses a new obligation to pay off or replace the existing debt. Neither description guarantees eligibility, a lower rate, lower total cost or a fee-free process.
Fannie Mae’s cited procedure says a servicer may agree to reduce P&I after a substantial curtailment for its specified current loan categories, using current unpaid principal, the current rate and remaining term. That programme rule is not an automatic right for every mortgage. A contract-required payment recast on an ARM or after an interest-only phase is a different use of the term.
Are these official questions, and do I need the app?
These are original teaching questions, not official or recalled PSI questions. Their score is not an official passing score or a validated readiness measure. Check the payment allocation and assumptions, then explain why a different loan pattern would change the answer.
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What is the standard monthly payment formula?
For a fully amortizing mathematical loan with equal end-of-month P&I payments, constant monthly rate r and n payments, M = B x r / (1 - (1 + r)^(-n)). B is the starting principal and r is the annual note rate divided by twelve in this model. At a zero rate, use M = B / n instead. Do not divide by zero.
For the invented $100,000, 6%, 360-payment example, the formula gives about $599.55 P&I. It excludes escrow, mortgage insurance, fees and other changes. Use a payment already supplied by an exam question when instructed; this optional explanation is not a claim that PSI requires memorizing the formula. Rounded payment displays and an actual cent-rounded final payment can differ slightly from a full-precision mathematical total.
Does principal repayment guarantee that my equity increased by the same amount?
Only with the other relevant values held constant does reducing a mortgage balance directly increase the residual ownership value by that reduction. Property value can fall, other liens can change and sale costs can affect net proceeds. A principal payment is not a guarantee of overall equity or available cash.
In this guide, amortization means debt repayment. Appraisal depreciation concerns a loss in value; tax depreciation concerns qualifying cost recovery under its own rules. Do not apply a mortgage payment schedule as an appraisal deduction, tax schedule or proof of gain on sale.
What if only part of the required payment is sent?
Do not assume it was immediately applied to principal or that the contract authorised a negative-amortization option. For the covered closed-end consumer principal-dwelling transactions under Section 1026.36(c)(1), the periodic payment covers principal, interest and applicable escrow, even if late fees or certain other charges are not included.
Subject to the legal obligation and applicable law, a partial payment may be credited, returned or held in a suspense or unapplied-funds account. If retained, required statements disclose it where applicable, and enough accumulated funds must be treated as a periodic payment. Crediting as of receipt is also different from the date a system posts its entry. Scope, exceptions and actual account treatment matter; this is not a private payment dispute or permission to pay less.
Are extra principal, prepayment and recasting always handled the same way?
No. The published Form 3200 allows prepayment without a prepayment charge, but it also requires written identification, current required payments before designation, and allows accrued unpaid interest on the prepayment amount to be applied first. A partial prepayment does not change payment amount or due date unless the note holder agrees in writing. Those are that instrument’s terms, not a rule that all loans have no lawful prepayment charge.
Fannie Mae’s cited guidance distinguishes current loans from delinquent loans, where added funds first cure delinquency, and has special balance-ordering rules for certain deferred or modified loans. Its voluntary recast process and loan categories have their own conditions. Do not infer a universal $10,000 minimum, fee, automatic approval or servicing sequence for every product from a generic example.
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Official sources and scope
Identified official and primary sources reviewed through October 27, 2026, with earlier actual readings identified where reused. Review dates are not new effective dates. The published Form 3200 and Fannie Mae servicing procedures have their stated scope, not universal terms for every loan. Numeric examples use invented inputs and explicit assumptions, not current mortgage offers or a private servicing audit. No loan, recast, payoff, prepayment, fee, tax result, legal deadline or borrower outcome is approved.
- PSI Illinois Candidate Information Booklet dated June 24, 2026
- CFPB: mortgage paydown and amortization
- CFPB: negative amortization
- CFPB: interest-only loans
- CFPB: monthly payment calculation and ARM reset
- CFPB: P&I versus total monthly payment
- CFPB: mortgage note rate and APR
- Fannie Mae/Freddie Mac Form3200: Multistate Fixed Rate Note
- Fannie Mae F-1-09: payment application and qualified re-amortization
- Fannie Mae C-1.2-01: current and delinquent loan principal payments
- CFPB: mortgage servicing records and payment application
- Regulation Z1026.36: covered payment processing and payoff scope
- Regulation Z1026.41: periodic-statement scope and records
- CFPB: date-specific payoff versus balance, reviewed August 28, 2026
- CFPB CHARM booklet: notation and document map
- Regulation Z Section 1026.37(b)(5): Loan Estimate balloon disclosure and interpretations
- Regulation Z Section 1026.38(b): Closing Disclosure loan terms
- Regulation Z Section 1026.18(s): distinct interest/payment disclosure scope
- CFPB: home equity and home-equity loans
- IAAO Glossary, third edition: depreciation, functional and external obsolescence, effective age and superadequacy
- IRS Publication 946, 2025 edition, chapter 1: tax depreciation as cost recovery; used only for that distinction
- 765 ILCS 905/17: full payment and holder-issued payoff statements
This is exam preparation, not advice for a specific transaction. State law and the applicable facts control. Our editorial and corrections process explains how to report an issue.