- Official section
- National IV: Financing
- Broker weight
- 10% of the national broker portion
- Expected scored items
- Financing accounts for about 10 of 100 items
Illinois exam glossary
Amortization
Amortization explains what happens inside a mortgage payment. Interest is paid for using the lender's money, principal reduction shrinks the debt, and the balance follows a schedule toward a target at the end. Once you can read that movement, balloon loans, extra payments, interest-only periods, and negative amortization become much easier to classify.
Last updated: August 1, 2026
What does this exam area cover?
Short answer: Amortization is scheduled repayment of a loan through periodic payments. In a typical level-payment fixed-rate mortgage, the principal-and-interest payment remains constant, interest is larger early, principal reduction becomes larger later, and the scheduled balance reaches zero at the end of a full amortization period. An amortization period can differ from the contractual loan term. If the payment is too small to cover accrued interest and unpaid interest is added to principal, negative amortization makes the balance rise instead of fall.
This guide uses current CFPB consumer guidance, Regulation Z disclosure rules and official interpretations, current CFPB servicing guidance, the Fannie Mae/Freddie Mac uniform fixed-rate note, and the PSI Illinois exam outline, all checked through August 1, 2026. Loan contracts, federal disclosures, servicing methods, compounding conventions, payment frequency, rounding, adjustable rates, modifications, and state law can change a real calculation. Exam examples use simplified monthly assumptions unless stated otherwise.
What is on the official outline?
- Topic
- Define amortization
- What to know
- Scheduled repayment, periodic payment, principal, interest, outstanding balance, reduction, full amortization, partial amortization, negative amortization, term, and maturity
- Best exam move
- Ask whether the scheduled balance falls, stays level, or grows after each required payment.
- Topic
- Identify original principal
- What to know
- Loan amount, amount borrowed, face amount, initial balance, unpaid principal balance, advance, down payment, purchase price, and amount financed
- Best exam move
- Do not confuse purchase price, original principal, amount financed, current balance, and payoff amount.
- Topic
- Calculate periodic interest
- What to know
- Annual note rate, periodic rate, monthly rate, outstanding balance, simple calculation, accrual period, daily interest, compounding convention, and rounding
- Best exam move
- In a simplified monthly problem, interest equals the beginning balance multiplied by the annual rate divided by 12.
- Topic
- Find principal reduction
- What to know
- Payment, interest portion, principal portion, scheduled curtailment, balance reduction, allocation order, and remaining principal
- Best exam move
- For a standard example, principal reduction equals the principal-and-interest payment minus that period's interest.
- Topic
- Find the new balance
- What to know
- Beginning balance, principal paid, ending balance, next period, cumulative reduction, extra principal, capitalization, and correction
- Best exam move
- Subtract principal paid from the beginning balance, not the entire payment.
- Topic
- Read a level-payment loan
- What to know
- Fixed rate, equal principal-and-interest payments, front-loaded interest allocation, increasing principal allocation, declining balance, and final payment
- Best exam move
- The payment can stay level while its interest and principal portions change every month.
- Topic
- Read an amortization schedule
- What to know
- Payment number, due date, beginning balance, payment, interest, principal, ending balance, cumulative interest, assumptions, and final balance
- Best exam move
- Trace one row at a time and make the ending balance the next row's beginning balance.
- Topic
- Separate payment components
- What to know
- Principal, interest, taxes, homeowners insurance, mortgage insurance, escrow, association dues, fees, and total monthly payment
- Best exam move
- Only the principal portion directly reduces the loan balance in the ordinary schedule.
- Topic
- Separate note rate and APR
- What to know
- Contract interest rate, annual percentage rate, finance charge, fees, points, prepaid finance charge, disclosure measure, and payment calculation
- Best exam move
- A mortgage payment is usually calculated from the note rate, not the disclosed APR.
- Topic
- Compare term and amortization
- What to know
- Contract term, maturity date, amortization period, payment calculation, remaining balance, balloon, renewal, refinance, and payoff
- Best exam move
- Equal periods can fully amortize; a shorter term than amortization usually leaves a balloon balance.
- Topic
- Recognize a balloon
- What to know
- Partially amortizing loan, long payment schedule, short maturity, large final payment, unpaid balance, refinance risk, sale, and extension
- Best exam move
- A loan may amortize during its term without fully amortizing by maturity.
- Topic
- Recognize interest-only
- What to know
- Interest payment, no scheduled principal, stable balance, interest-only period, payment reset, remaining term, recast, and balloon
- Best exam move
- Full interest with zero principal keeps the balance level; it does not by itself create negative amortization.
- Topic
- Recognize negative amortization
- What to know
- Payment below accrued interest, unpaid interest, capitalization, growing balance, payment option, balance cap, recast, disclosures, and payment shock
- Best exam move
- If accrued interest exceeds the payment and the difference is added to principal, the balance increases.
- Topic
- Compare amortization periods
- What to know
- 15-year, 20-year, 30-year, payment size, principal pace, total interest, affordability, equity, same rate, and same principal
- Best exam move
- Holding principal and rate constant, shorter amortization means a higher payment and less total scheduled interest.
- Topic
- Apply extra principal
- What to know
- Additional payment, principal-only instruction, balance reduction, interest savings, earlier payoff, payment application, recast, and prepayment term
- Best exam move
- Extra principal usually changes the path and payoff date, but does not automatically change the required payment.
- Topic
- Distinguish recast and refinance
- What to know
- New payment calculation, same loan, reduced balance, remaining term, lender approval, new loan, underwriting, closing costs, and rate
- Best exam move
- A recast recalculates payments on an existing loan; a refinance replaces it with a new loan.
- Topic
- Handle adjustable rates
- What to know
- Index, margin, rate change, payment change, caps, recalculation, remaining balance, remaining term, payment shock, and new schedule
- Best exam move
- An ARM can amortize, but its payment and schedule may be recalculated when the rate changes.
- Topic
- Read servicing statements
- What to know
- Amount due, principal applied, interest applied, escrow, fees, suspense, current balance, delinquency, partial payment, and transaction history
- Best exam move
- The original schedule is a model; the actual servicing history shows what was credited.
- Topic
- Close the calculation
- What to know
- Maturity, final scheduled payment, payoff quote, per diem interest, unpaid charges, escrow balance, release, satisfaction, and zero balance
- Best exam move
- A schedule's projected last payment is not a current payoff statement and does not itself release the mortgage lien.
Which distinctions produce the most mistakes?
- Terms
- Amortization vs. depreciation
- Difference
- Amortization here describes repayment of debt. Depreciation in appraisal describes loss in value from any cause, while tax depreciation is a separate accounting concept.
- Question cue
- Debt repayment versus value or tax concept.
- Terms
- Principal-and-interest payment vs. total monthly payment
- Difference
- Principal and interest service the debt. The total collection may add taxes, homeowners insurance, mortgage insurance, escrow adjustments, and permitted fees.
- Question cue
- Loan payment versus total housing collection.
- Terms
- Principal vs. interest
- Difference
- Principal is the outstanding debt amount. Interest is the charge for use of that money and ordinarily does not reduce the balance.
- Question cue
- Amount owed versus cost of borrowing.
- Terms
- Original principal vs. unpaid principal balance
- Difference
- Original principal is the amount at loan inception. The unpaid balance changes as principal is paid, advanced, corrected, or lawfully capitalized.
- Question cue
- Starting debt versus current principal debt.
- Terms
- Note rate vs. APR
- Difference
- The note rate determines contractual interest under the note. APR is a federal cost-of-credit disclosure that includes defined finance charges.
- Question cue
- Contract rate versus disclosure measure.
- Terms
- Amortization period vs. loan term
- Difference
- The amortization period drives the payment calculation. The term ends at contractual maturity and may be shorter, equal, or in unusual structures otherwise related to that period.
- Question cue
- Payment schedule length versus maturity length.
- Terms
- Fully amortizing vs. partially amortizing
- Difference
- A fully amortizing pattern reaches zero by the relevant end date. A partially amortizing loan reduces principal but leaves a balance due at maturity.
- Question cue
- Zero ending balance versus balloon balance.
- Terms
- Interest-only vs. negative amortization
- Difference
- A full interest-only payment normally leaves principal unchanged. Negative amortization adds unpaid accrued interest to principal and grows the balance.
- Question cue
- Level balance versus growing balance.
- Terms
- Extra principal vs. payment in advance
- Difference
- Extra principal should reduce the balance. Simply sending money early or without clear instructions may be handled under the note and servicer's application rules.
- Question cue
- Principal curtailment versus payment timing.
- Terms
- Recast vs. refinance
- Difference
- A recast recalculates payments on the existing debt after a balance reduction. A refinance pays off that debt with a new obligation.
- Question cue
- Recalculate existing loan versus replace loan.
- Terms
- Amortization schedule vs. payment history
- Difference
- The schedule projects payments under assumptions. The history records actual credits, shortages, fees, advances, reversals, and dates.
- Question cue
- Forecast versus actual ledger.
- Terms
- Scheduled balance vs. payoff amount
- Difference
- The scheduled balance is projected principal. A payoff quote can add accrued interest and other authorized amounts through a stated date.
- Question cue
- Projected principal versus dated satisfaction amount.
The B-A-L-A-N-C-E amortization check
- B: Begin with the unpaid principal balance for the period.
- A: Apply the periodic rate to find accrued interest under the problem's assumptions.
- L: Locate the required principal-and-interest payment, excluding escrow unless told otherwise.
- A: Allocate the payment to interest first and principal second in the simplified exam model.
- N: Net principal reduction equals payment minus interest.
- C: Carry the ending balance into the next period and repeat.
- E: Examine the end date for zero balance, a balloon, a level balance, or negative amortization.
- Payment result
- Payment exceeds accrued interest
- Interest covered?
- Yes
- Principal movement
- Balance decreases
- Exam classification
- Positive amortization
- Payment result
- Payment equals accrued interest
- Interest covered?
- Yes
- Principal movement
- Balance stays level
- Exam classification
- Interest-only result
- Payment result
- Payment is below accrued interest
- Interest covered?
- No
- Principal movement
- Balance can increase
- Exam classification
- Negative amortization if unpaid interest is capitalized
- Payment result
- Balance reaches zero at end
- Interest covered?
- Yes
- Principal movement
- Fully repaid
- Exam classification
- Fully amortizing
- Payment result
- Balance remains at maturity
- Interest covered?
- Usually
- Principal movement
- Balloon remains
- Exam classification
- Partially amortizing
- Payment result
- Extra principal is applied
- Interest covered?
- Yes
- Principal movement
- Balance falls faster
- Exam classification
- Earlier payoff or possible recast
How do the rules work in scenarios?
One payment split
Scenario: A simplified exam loan begins the month at $240,000, bears 6% annual interest, and has a $1,500 principal-and-interest payment.
- Monthly interest is $240,000 times 0.06 divided by 12, or $1,200. The remaining $300 reduces principal. The new balance is $239,700. Subtracting the full $1,500 from principal would be the classic mistake.
Answer: $1,200 interest, $300 principal, $239,700 ending balance.
Why the split changes
Scenario: Later, the same fixed-rate loan has a $180,000 beginning balance and the same $1,500 payment.
- At 6%, simplified monthly interest is $900. That leaves $600 for principal. The lower balance produces less interest, so twice as much of the unchanged payment reaches principal compared with the earlier example.
Answer: Level payment, lower interest portion, higher principal portion.
PITI is not the amortizing payment
Scenario: A borrower pays $1,450 principal and interest, $480 property-tax escrow, $140 homeowners-insurance escrow, and $85 mortgage insurance.
- The total monthly collection is $2,155. The debt amortization is driven by the $1,450 principal-and-interest amount and its allocation. Escrow and insurance amounts do not directly reduce principal.
Answer: $1,450 debt payment; $2,155 total monthly collection.
Balloon structure
Scenario: Payments are calculated on a 30-year amortization schedule, but the note matures after 7 years.
- The scheduled payments reduce principal during the 7 years, but they were not designed to reach zero that soon. Unless prepaid, extended, sold, or refinanced, the remaining unpaid balance becomes due at maturity.
Answer: Partially amortizing during the term with a balloon due at maturity.
Interest-only period
Scenario: Monthly accrued interest is $1,050 and the permitted payment is exactly $1,050 for the initial period.
- The payment covers all interest but none of principal. The principal balance stays unchanged, assuming no other advances or charges. This is not negative amortization because no unpaid interest is added to principal.
Answer: Level principal balance during the interest-only period.
Negative amortization
Scenario: Monthly accrued interest is $1,100, but a payment option allows $850 and the $250 difference is added to the balance.
- The borrower made the permitted payment, yet the payment did not cover accrued interest. Capitalizing the $250 increases principal, which can cause future interest to be calculated on a larger balance.
Answer: $250 of negative amortization for the period.
Extra principal without recast
Scenario: A borrower makes the required monthly payment and sends an additional $10,000 that the servicer properly applies to principal.
- The balance drops immediately, so later interest generally accrues on less principal and the loan can pay off earlier. Unless the loan is formally recast, the required scheduled payment normally remains the same.
Answer: Faster amortization, not an automatic lower required payment.
What are the common exam traps?
- Trap
- Subtracting the entire payment from principal
- Correction
- First calculate interest. Only the remainder allocated to principal reduces the balance.
- Trap
- Assuming level payment means level interest
- Correction
- On a typical level-payment loan, interest declines and principal reduction rises as the balance falls.
- Trap
- Using PITI as the amortization payment
- Correction
- Separate principal and interest from tax, insurance, mortgage-insurance, and escrow amounts.
- Trap
- Using APR to calculate the note payment
- Correction
- Use the contractual note rate unless the question expressly supplies another calculation rule.
- Trap
- Treating term and amortization as synonyms
- Correction
- Check both periods. A short term paired with a longer amortization schedule can create a balloon.
- Trap
- Calling every balance-reducing loan fully amortizing
- Correction
- Positive amortization can still leave a balance at maturity. Full amortization reaches the target zero balance by the relevant end date.
- Trap
- Calling interest-only negative amortization
- Correction
- If all accrued interest is paid, principal stays level. Negative amortization requires unpaid interest to increase the balance.
- Trap
- Assuming a made payment always lowers principal
- Correction
- A permitted payment can be interest-only or below accrued interest. Read the payment option and allocation.
- Trap
- Assuming a longer schedule is cheaper
- Correction
- It may lower the periodic payment, but usually increases total scheduled interest when principal and rate are held constant.
- Trap
- Assuming extra principal lowers next month's required payment
- Correction
- It generally lowers the balance and future interest. A formal recast may be needed to lower the required payment.
- Trap
- Treating the original schedule as actual history
- Correction
- Late payments, extra payments, modifications, rate changes, fees, and corrections can alter actual results.
- Trap
- Ignoring payment frequency and day count
- Correction
- Real loans can use daily interest, odd first periods, biweekly arrangements, or other conventions. Follow the stated facts.
- Trap
- Rounding too early
- Correction
- Carry enough decimal precision through intermediate calculations, then round the requested final amount.
- Trap
- Calling scheduled principal the payoff amount
- Correction
- A payoff quote may include interest through a date and other permitted amounts beyond unpaid principal.
- Trap
- Promising a real borrower a result from an exam shortcut
- Correction
- Use the executed documents and official servicing records for live matters. Simplified exam math is not an account audit.
Can you answer these original practice questions?
These questions are original study items aligned to the published outline. They are not copied, recalled, or predicted PSI questions.
1. A level-payment fixed-rate mortgage is early in its schedule. Which statement is generally correct?
- Most of the payment is principal
- The interest portion is generally larger than it will be late in the schedule
- The balance increases after every payment
- Taxes are applied to principal first
Show answer and explanation
Answer: The interest portion is generally larger than it will be late in the schedule
Interest is calculated on a larger outstanding balance early. As principal falls, less of the level payment is needed for interest and more reaches principal.
2. A loan balance is $180,000, the annual rate is 6%, and the monthly principal-and-interest payment is $1,200. Under simplified monthly assumptions, how much principal is paid?
- $300
- $900
- $1,200
- $1,800
Show answer and explanation
Answer: $300
Monthly interest is $180,000 times 6% divided by 12, or $900. Principal is $1,200 minus $900, or $300.
3. Payments are calculated over 30 years, but all unpaid amounts mature after 5 years. What feature should the student recognize?
- A fully amortizing five-year loan
- A balloon structure
- Automatic forgiveness
- A reverse mortgage
Show answer and explanation
Answer: A balloon structure
The longer amortization schedule does not repay the balance within the shorter term, so a remaining balance is due at maturity.
4. Accrued monthly interest is $950 and the required payment is exactly $950. What happens to principal, assuming no other amounts?
- It decreases by $950
- It stays level
- It increases by $950
- It is forgiven
Show answer and explanation
Answer: It stays level
The payment covers interest only. No amount remains to reduce principal, but no unpaid interest is added.
5. Accrued interest is $1,000, the permitted payment is $800, and the unpaid $200 is added to principal. This is:
- Positive amortization
- Negative amortization
- A principal curtailment
- A tax escrow shortage
Show answer and explanation
Answer: Negative amortization
The payment is less than accrued interest, and capitalization of the difference makes the balance grow.
6. Which amount directly reduces the unpaid loan balance in an ordinary mortgage payment?
- Property-tax escrow
- Homeowners-insurance escrow
- The principal portion
- The interest portion
Show answer and explanation
Answer: The principal portion
Principal reduction lowers the debt. Interest is the charge for credit, and escrow funds pay separate property expenses.
7. Holding loan amount and rate constant, which change generally produces a higher payment and less total scheduled interest?
- A longer amortization period
- A shorter amortization period
- A larger escrow deposit
- A later property-tax bill
Show answer and explanation
Answer: A shorter amortization period
Principal must be repaid faster, so the periodic payment rises, but the debt remains outstanding for fewer periods.
8. A borrower makes a large principal curtailment. Which statement is safest?
- The required payment automatically falls
- The interest rate automatically falls
- The balance falls, but a formal recast may be needed to lower the required payment
- The mortgage lien is automatically released
Show answer and explanation
Answer: The balance falls, but a formal recast may be needed to lower the required payment
Extra principal changes the balance and usually shortens payoff if the payment continues. It does not automatically rewrite the scheduled payment.
9. Which document is a forecast rather than the actual transaction history?
- An amortization schedule prepared at origination
- A servicer's transaction ledger
- A payoff statement through a stated date
- A recorded mortgage release
Show answer and explanation
Answer: An amortization schedule prepared at origination
The schedule projects the balance under assumptions. Actual payments and account activity can create a different path.
10. The scheduled unpaid principal is $150,000. Why might the payoff quote be higher?
- Payoff can include accrued interest and other authorized amounts through the payoff date
- Principal never appears in a payoff
- Escrow always doubles the debt
- Amortization eliminates interest immediately
Show answer and explanation
Answer: Payoff can include accrued interest and other authorized amounts through the payoff date
Unpaid principal is the core balance, but a dated payoff can add per diem interest and other amounts authorized by the documents and law.
How should you study this area?
- Session
- Session 1
- Focus
- Learn the moving parts
- Proof you are ready
- Define principal, interest, payment, balance, amortization period, term, and maturity, draw one payment split, and recite the B-A-L-A-N-C-E check without notes.
- Session
- Session 2
- Focus
- Work one-row math
- Proof you are ready
- Complete ten beginning-balance, interest, principal, and ending-balance calculations, then verify that each payment equals interest plus principal.
- Session
- Session 3
- Focus
- Compare loan patterns
- Proof you are ready
- Sort 30 examples into fully amortizing, partially amortizing, interest-only, and negatively amortizing groups, then explain each classification.
- Session
- Session 4
- Focus
- Separate nearby concepts
- Proof you are ready
- Contrast principal and interest, note rate and APR, P&I and PITI, recast and refinance, then separate a schedule, history, balance, and payoff quote.
- Session
- Session 5
- Focus
- Read primary sources
- Proof you are ready
- Annotate the CFPB paydown and Closing Disclosure explanations and the payment and maturity clauses in the current uniform fixed-rate note.
- Session
- Session 6
- Focus
- Test and teach
- Proof you are ready
- Score at least 90 percent on mixed questions, explain every distractor, and teach a two-minute example from beginning balance to ending balance.
Do not count recognition as mastery. Close the notes and explain the rule, apply it to a new fact pattern, and identify why each distractor fails.
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Questions students ask about Amortization: Illinois Real Estate Exam Guide
What is amortization in real estate?
Amortization is the process of reducing a loan balance through scheduled payments over time. On a typical fully amortizing fixed-rate mortgage, each principal-and-interest payment covers the interest accrued for the period and reduces principal enough to bring the scheduled balance to zero at the end of the amortization period.
How does a mortgage payment change during amortization?
For a typical fixed-rate, level-payment loan, the scheduled principal-and-interest payment stays the same while its internal allocation changes. Interest is larger early because the outstanding balance is larger. As principal falls, periodic interest falls and more of the same payment reaches principal. Taxes, insurance, mortgage insurance, fees, and escrow changes can still change the total amount collected.
What is an amortization schedule?
An amortization schedule is a payment-by-payment table showing the scheduled payment, interest portion, principal portion, and remaining balance. It is a forecast based on stated assumptions. Extra principal, late payments, modifications, rate adjustments, payment changes, advances, fees, or rounding can make the actual account history differ from the original schedule.
What does fully amortizing mean?
A fully amortizing payment pattern is designed to repay all scheduled principal and accrued interest by the end of the amortization period, assuming payments are made as required and the stated assumptions hold. It does not mean the borrower has already paid the loan, nor does it mean taxes, insurance, or other housing costs are included.
What is the difference between amortization period and loan term?
The amortization period is the time used to calculate scheduled principal repayment. The loan term is the contractual time until maturity. They can be equal, as with a common 30-year fully amortizing loan. They can also differ, as when payments are calculated over 30 years but the remaining balance is due after 5 years as a balloon.
What is negative amortization?
Negative amortization occurs when the permitted payment is less than the interest accruing for the period and the unpaid interest is added to principal. The balance grows even though the borrower makes the permitted payment. It is the opposite of ordinary principal reduction and requires careful attention to the loan terms and federal disclosures.
Is an interest-only loan negatively amortizing?
Not necessarily. If the payment covers all interest due but no principal, the balance generally stays level during the interest-only period. If the payment covers less than all accrued interest and unpaid interest is added to principal, the balance grows and negative amortization occurs. Interest-only and negative amortization are related concepts, not synonyms.
Does a longer amortization period lower the payment?
With the same principal and interest rate, spreading repayment over more periods generally lowers the scheduled payment but increases total interest if the loan is kept and paid as scheduled for the longer period. A shorter period generally raises the payment, reduces principal faster, and lowers total scheduled interest.
Do extra principal payments change amortization?
Properly applied extra principal lowers the balance earlier, which usually reduces later interest and can shorten payoff time. It does not automatically lower the required monthly payment. A lender or servicer may need to approve a formal recast to calculate a new lower payment while keeping the remaining term. The note, servicing rules, and payment instructions control.
Is the principal-and-interest payment the same as PITI?
No. Principal and interest repay the debt. PITI adds property taxes and insurance, and a total payment may also include mortgage insurance or other required amounts. The debt may amortize exactly as scheduled while the total monthly collection changes because taxes, insurance premiums, or escrow requirements change.
Are these official PSI questions or financial advice?
No. The practice questions are original, and primary sources were checked through August 1, 2026. This is exam education, not lending, accounting, tax, servicing, foreclosure, or financial advice. For a live loan, review the executed note, payment history, escrow statements, servicing records, disclosures, and applicable law with qualified professionals.
Primary sources
- PSI Illinois Candidate Information Booklet effective June 24, 2026
- Consumer Financial Protection Bureau, official explanation of mortgage paydown and amortization
- Consumer Financial Protection Bureau, official mortgage key terms including amortization and negative amortization
- Consumer Financial Protection Bureau, principal-and-interest payment versus total monthly payment
- Consumer Financial Protection Bureau, official Closing Disclosure explainer
- Consumer Financial Protection Bureau, Regulation Z section 1026.18 and official interpretations on amortizing and negative-amortization disclosures
- Consumer Financial Protection Bureau, current federal mortgage-servicing guidance on payment application and statements
- Fannie Mae/Freddie Mac Multistate Fixed-Rate Note Form 3200, current payment and maturity terms
The current official outline controls the tested scope. Statutes, regulations, and official agency materials control when a general study rule and a jurisdiction-specific rule differ.
Editorial status
Checked against primary sources
The Pass Illinois editorial team last checked this guide on August 1, 2026. Every practice question is an original study item, and the source links above let you verify the rules that support the lesson.