See Your Amortization Schedule
Enter your loan amount, interest rate, and term to see your complete amortization schedule -- including the exact principal and interest breakdown for every payment.
Quick Answer
Quick Answer: An amortization schedule shows how each loan payment splits between principal (paying down your balance) and interest (the cost of borrowing). Early in the loan, most of your payment goes to interest. Over time, the split reverses and more goes to principal. On a $250,000, 30-year mortgage at 6.5%, your monthly payment is approximately $1,580. In month 1, roughly $1,354 goes to interest and only $226 to principal. By the halfway point (payment 180), the split is approximately $986 interest and $594 principal.
Key Takeaways
- Amortization spreads your loan repayment into equal monthly payments, but each payment's principal/interest split changes over time -- early payments are interest-heavy, late payments are principal-heavy
- On a $250,000, 30-year mortgage at 6.5%, you will pay approximately $319,000 in total interest -- more than the original loan amount
- Choosing a 15-year term instead of 30-year cuts total interest by roughly 55%, but increases your monthly payment by approximately 38%
- An extra $200/month on a $250,000, 30-year mortgage at 6.5% saves approximately $98,000 in interest and pays off the loan nearly 8 years early
- Use our Loan Calculator to see exactly how your payments are structured and how extra payments affect your total cost
What Is Loan Amortization?
Loan amortization is the process of paying off a loan through regular, scheduled payments over a set period of time. Each payment covers two things: interest owed on the remaining balance and a portion of the original loan amount (principal).
The word "amortize" comes from the Latin admortire, meaning "to kill." When you amortize a loan, you are gradually killing the debt with each payment until the balance reaches zero.
Amortization applies to fixed-rate installment loans, including:
- Mortgages (15-year, 30-year)
- Auto loans
- Personal loans
- Student loans (federal and private)
Loans that are not typically amortized include credit cards (revolving debt with variable payments), interest-only loans, and balloon loans (small payments with a large lump sum due at the end). For mortgage-specific payment breakdowns, try our Mortgage Payment Calculator.
The amortization schedule is the complete payment-by-payment breakdown showing how much of each payment goes to principal and how much goes to interest. Understanding this schedule helps you make informed decisions about debt payoff strategies, extra payments, and loan term selection.
How Amortization Works: A Step-by-Step Example
The Monthly Payment Formula
Every amortized loan uses the same formula to calculate the fixed monthly payment:
The Formula
Monthly Payment = P × [r(1+r)n] / [(1+r)n - 1]
P = principal (loan amount). r = monthly interest rate (annual rate divided by 12). n = total number of payments.
Let's put this formula into practice. Here is an example using a $20,000 auto loan at 5.5% for 60 months:
- Monthly rate (r) = 0.055 / 12 = 0.004583
- Number of payments (n) = 60
- Monthly payment = approximately $382
- Total paid over 60 months: $382 × 60 = $22,920
- Total interest: $22,920 - $20,000 = $2,920
Run this example in the Loan Calculator
How Each Payment Is Allocated
While the monthly payment stays the same, the way it is split between principal and interest changes with every payment. Here is a step-by-step breakdown for the $20,000 auto loan example:
Month 1:
- Interest: $20,000 × 0.004583 = $91.67
- Principal: $382 - $91.67 = $290.33
- Remaining balance: $20,000 - $290.33 = $19,709.67
Month 2:
- Interest: $19,709.67 × 0.004583 = $90.34
- Principal: $382 - $90.34 = $291.66
- Remaining balance: $19,709.67 - $291.66 = $19,418.01
Notice the pattern: as the balance decreases, less interest accrues, so more of each payment goes to principal. This creates the gradual shift from interest-heavy to principal-heavy payments that defines amortization.
Why Early Payments Are Mostly Interest
Interest is calculated on the remaining balance each month. At the beginning of the loan, the balance is at its highest, so the interest charge is at its highest.
As you pay down the balance, less interest accrues, leaving more room for principal in each fixed payment. The "crossover point" -- where principal exceeds interest in each payment -- varies by loan term and rate:
- 30-year mortgage: about 19.4 years in (payment 233) on the $250,000 loan at 6.5% used below, and about 18.5-20.6 years across the 30-year rates in Section 8 (5.98-7.28%)
- 15-year mortgage: about 4.4 years in (payment 53) on the $250,000 loan at 6.5% used below, and about 2.2-4.6 years across the 15-year rates in Section 8 (5.35-6.60%)
- 5-year auto loan: principal exceeds interest from the first payment -- in the $20,000 example above, Month 1 already sends $290.33 to principal and $91.67 to interest
This is why shorter-term loans, while having higher monthly payments, cost dramatically less in total interest. To understand the true cost of borrowing including fees, see our guide on APR vs Interest Rate.
How to Read an Amortization Schedule
An amortization schedule lists every payment on your loan. Here is a sample schedule for a $250,000 mortgage at 6.5%, 30-year term (monthly payment: approximately $1,580):
| Payment # | Payment | Principal | Interest | Remaining Balance |
|---|---|---|---|---|
| 1 | $1,580 | $226 | $1,354 | $249,774 |
| 12 (Year 1) | $1,580 | $240 | $1,340 | $247,206 |
| 60 (Year 5) | $1,580 | $311 | $1,269 | $234,027 |
| 120 (Year 10) | $1,580 | $430 | $1,150 | $211,940 |
| 180 (Year 15) | $1,580 | $594 | $986 | $181,398 |
| 233 (Year 20) | $1,580 | $791 | $789 | $144,824 |
| 240 (Year 20) | $1,580 | $822 | $758 | $139,163 |
| 300 (Year 25) | $1,580 | $1,137 | $444 | $80,760 |
| 360 (Year 30) | $1,580 | $1,572 | $9 | $0 |
Example uses hypothetical loan scenario for educational purposes. Every row is computed from the exact payment ($1,580.17) and rounded to the nearest dollar, so principal and interest may not add exactly to the rounded payment. The highlighted row shows the approximate crossover point where principal exceeds interest. Actual amortization depends on your specific loan terms. Use our Loan Calculator for your personalized schedule.
Here is what each column tells you:
- Payment: Your fixed monthly amount -- this stays the same for the life of the loan
- Principal: The portion of your payment that reduces your loan balance
- Interest: The cost of borrowing -- calculated on the remaining balance
- Remaining Balance: What you still owe after the payment
The crossover point (highlighted row) where principal exceeds interest occurs around payment 233 (year 20, about 19.4 years into the loan) at this rate. Total interest paid over 30 years: approximately $319,000 -- more than the original $250,000 loan.
Understanding how PITI payments work can help you see where amortization fits within your total monthly housing cost, which also includes property taxes and insurance.
15-Year vs. 30-Year Amortization Comparison
One of the biggest decisions borrowers face is choosing between a shorter and longer loan term. Here is a side-by-side comparison for a $250,000 mortgage at 6.5%:
| Factor | 15-Year | 30-Year | Difference |
|---|---|---|---|
| Monthly payment | $2,178 | $1,580 | +$598/month |
| Total interest paid | $142,000 | $319,000 | Save $177,000 |
| Total cost (principal + interest) | $392,000 | $569,000 | Save $177,000 |
| Principal exceeds interest | ~Year 5 (payment 53) | ~Year 20 (payment 233) | 15 years earlier |
| Equity at year 5 | $58,000 | $16,000 | 3.6x more equity |
Example uses hypothetical rates for educational purposes. Actual rates depend on your credit score, lender, and market conditions. 15-year mortgages may qualify for slightly lower rates than shown.
The 15-year term costs 38% more per month but saves 55% in total interest ($141,998 against $318,861). That is a $177,000 difference on the same $250,000 loan. For the full trade-off between the two mortgage terms, see our 15-year vs 30-year mortgage guide.
When a 15-Year Term Makes Sense
- You have stable income and can comfortably afford the higher payment
- You have no high-interest debt that should be prioritized first
- You want to build equity fast and own your home outright sooner
- You are planning to stay in the home long-term
When a 30-Year Term Makes Sense
- You need a lower monthly payment for budget flexibility
- You prefer to invest the payment difference in higher-returning assets
- You may move within 5-10 years
- You want the option to make extra payments when you can, without being locked into a higher required payment
For help determining what monthly payment fits your budget, see our guide on How Much House Can I Afford. You can also explore how your down payment amount affects your total loan and amortization schedule.
How Extra Payments Save You Money
The Math Behind Extra Payments
Extra payments go directly to principal, reducing your balance faster. A lower balance means less interest accrues in subsequent months, and the savings compound: each extra payment reduces future interest, which means more of your future regular payments go to principal as well.
Here is the impact of extra payments on a $250,000, 30-year mortgage at 6.5%:
| Extra Payment | Years Saved | Interest Saved | New Payoff Time |
|---|---|---|---|
| $0/month (standard) | 0 | $0 | 30 years |
| $100/month | 4 yr 8 mo | $59,000 | 25 yr 4 mo |
| $200/month | 7 yr 11 mo | $98,000 | 22 yr 1 mo |
| $500/month | 13 yr 9 mo | $164,000 | 16 yr 3 mo |
| $1,000/month | 18 yr 6 mo | $213,000 | 11 yr 6 mo |
| 1 extra payment/year | 5 yr 10 mo | $73,000 | 24 yr 2 mo |
Estimates assume consistent extra payments starting from month 1, applied to principal. Times are shown in years and months; interest saved is rounded to the nearest $1,000. The one-extra-payment row adds one-twelfth of a payment ($131.68) each month, the same yearly total as one extra payment. Actual savings depend on when extra payments begin and how your lender applies them. Verify extra payments are applied to principal. Use our Loan Calculator to model your specific scenario.
The highlighted row shows that $200/month extra saves $98,000 in interest -- roughly $52,800 of extra payments over the 22-year payoff returns about $1.85 for every extra dollar paid. Even modest extra payments make a significant difference.
Strategies for Making Extra Payments
- Round up your payment: If your payment is $1,580, pay $1,600. The extra $20 per month adds up over decades.
- Make biweekly payments: Pay half your monthly payment every two weeks. You make 26 half-payments (13 full payments) per year instead of 12 -- that is one extra payment per year without feeling the pinch.
- Apply windfalls: Tax refunds, bonuses, or raises can make a significant one-time impact on your principal balance.
- Designate extra payments to principal: Tell your lender the extra amount should go to principal, not be applied to future payments or placed in escrow.
- Check for prepayment penalties: Most modern loans have no prepayment penalty, but verify with your lender before making extra payments.
Before Making Extra Payments
Consider whether your money could work harder elsewhere first. If you have high-interest credit card debt, paying that down typically saves more than extra mortgage payments. See our Compound Interest Guide to understand how interest rates compound for and against you. Also ensure you have a fully funded emergency fund and are maximizing your 401(k) employer match before directing extra cash to your mortgage.
Amortization for Different Loan Types
Amortization works the same way across all fixed-rate installment loans, but the loan term and interest rate determine how the schedule plays out. Here is how amortization typically looks across common loan types:
| Loan Type | Typical Term | Typical Rate (2026) | Total Interest Example |
|---|---|---|---|
| Mortgage (30-year) | 30 years | 5.98-7.28% | $288,000-$366,000 on $250,000 |
| Mortgage (15-year) | 15 years | 5.35-6.60% | $114,000-$144,000 on $250,000 |
| Auto loan | 3-7 years | 5.0-9.0% | $2,400-$10,500 on $30,000 |
| Personal loan | 2-7 years | 7.0-20.0% | $1,100-$13,000 on $15,000 |
| Student loan (federal) | 10-25 years | 6.5-9.5% | $10,900-$48,600 on $30,000 |
Mortgage ranges are the lowest and highest Freddie Mac PMMS weekly averages of 2026, from the week of January 8 through the week of October 1, 2026 (historical data read October 6, 2026; the most recent weekly averages follow the table); other rates verified August 19, 2026 against Bankrate auto and personal loan surveys, and U.S. Department of Education 2026-27 federal student loan rates (undergraduate 6.52%, PLUS 9.07%). Total interest examples are recomputed from the stated rate and term ranges. Rates change frequently -- confirm current offers before borrowing.
Freddie Mac publishes the national 30-year and 15-year fixed averages every week. The most recent figures when this page was built:
As of October 8, 2026, the average 30-year fixed mortgage rate was 7.40%. Source: Freddie Mac, 30-Year Fixed Rate Mortgage Average in the United States [MORTGAGE30US], retrieved from FRED, Federal Reserve Bank of St. Louis (opens in new tab).
As of October 8, 2026, the average 15-year fixed mortgage rate was 6.73%. Source: Freddie Mac, 15-Year Fixed Rate Mortgage Average in the United States [MORTGAGE15US], retrieved from FRED, Federal Reserve Bank of St. Louis (opens in new tab).
Rate ranges reflect market conditions on the dates in the note under the table and vary by credit score, lender, and loan characteristics. Total interest ranges show approximate low and high estimates for each loan type, computed from the shortest term at the lowest rate through the longest term at the highest rate. Individual rates depend on creditworthiness and other factors.
The key insight: shorter-term loans (auto, personal) have amortization schedules where the principal/interest crossover happens much earlier. At every auto loan rate and term in the table above (5.0-9.0%, 3-7 years), principal exceeds interest from the very first payment. Personal loans do too, except at the high-rate, long-term end: at 20% over 5 years the crossover comes at payment 20, and over 7 years at payment 44. On a 30-year mortgage, that crossover does not happen until roughly year 20 (payment 233 at 6.5%).
For mortgages, the long term means borrowers often sell or refinance before reaching the crossover point -- which is one reason understanding your amortization schedule matters for making informed decisions.
Learn more about rates for specific loan types:
- Auto Loan Rates by Credit Score 2026
- Personal Loan Rates by Credit Score
- Student Loan Forgiveness Guide -- for federal loan repayment options
- How Long to Pay Off Student Loans -- for payoff timeline estimates
If you are managing multiple loans simultaneously, our Debt Snowball vs Avalanche guide compares the two most popular strategies for prioritizing which loan to pay off first.
Frequently Asked Questions
An amortization schedule is a table that shows every payment on a loan from the first to the last, breaking each payment into the portion that goes to interest and the portion that goes to principal. It also shows the remaining loan balance after each payment. You can generate your amortization schedule using our Loan Calculator.
Interest is calculated on the remaining loan balance. At the beginning, your balance is at its highest, so the interest charge is highest. As you pay down the balance, less interest accrues each month, and more of your fixed payment goes to principal. On a 30-year mortgage at rates of 5.98-7.28%, it takes about 18.5-20.6 years before principal exceeds interest in each payment.
Extra payments go directly to principal, reducing your balance faster. This means less interest accrues in future months, which means more of your regular payments go to principal. The effect compounds: an extra $200/month on a $250,000 mortgage at 6.5% saves approximately $98,000 in interest and pays off the loan nearly 8 years early.
It depends on your financial situation. A 15-year mortgage saves dramatically on interest (approximately $177,000 on a $250,000 loan at 6.5%) but requires a higher monthly payment (approximately $598/month more). Choose 15-year if you can comfortably afford the higher payment and want to build equity fast. Choose 30-year if you need lower payments for flexibility or plan to invest the difference.
Fixed-rate installment loans use amortization: mortgages, auto loans, personal loans, and student loans. Loans that do NOT use traditional amortization include credit cards (revolving debt with variable payments), interest-only loans (no principal reduction during the interest-only period), and balloon loans (small payments with a large lump sum due at the end).
Yes, in several ways: (1) make extra principal payments to accelerate payoff, (2) refinance to a different rate or term -- see our When to Refinance guide for decision criteria, or (3) recast your mortgage (some lenders allow you to re-amortize after a lump-sum principal payment, lowering your monthly payment). Each option changes your schedule in different ways.
It depends on the loan amount, rate, and term. As a general reference: on a $250,000, 30-year mortgage at 6.5%, you will pay approximately $319,000 in interest over the life of the loan -- more than the original loan amount. Use our Loan Calculator to see the exact total interest for your specific loan.
Negative amortization occurs when your monthly payment is less than the interest owed, causing the loan balance to increase rather than decrease. This can happen with certain adjustable-rate mortgages or payment-option loans. Negative amortization is generally unfavorable and should be avoided. If you suspect your loan has negative amortization, consult your lender or a financial advisor.
Key Takeaways and Next Steps
- An amortization schedule breaks every loan payment into principal and interest. Early payments are interest-heavy because interest is calculated on the larger remaining balance.
- On a $250,000, 30-year mortgage at 6.5%, you pay approximately $319,000 in total interest -- more than the original loan amount.
- Extra payments go directly to principal: $200/month extra saves approximately $98,000 in interest and cuts nearly 8 years off a 30-year mortgage.
- A 15-year term saves approximately $177,000 in interest compared to a 30-year term on the same $250,000 loan, but costs $598/month more.
- Understanding your amortization schedule helps you make informed decisions about extra payments, refinancing, and choosing the right loan term for your situation.
The best way to understand your specific loan is to see the numbers. Enter your loan amount, interest rate, and term into our calculator to generate your complete amortization schedule and model extra payment scenarios.
Generate Your Amortization Schedule Now →
For more guidance on managing debt and building financial stability, explore our Debt Consolidation Guide, use our Closing Costs Guide to understand the full cost of buying a home, or learn how your amortization schedule affects the Mortgage Interest Deduction on your taxes.
Sources
- Consumer Financial Protection Bureau -- What Is Amortization?(opens in new tab)
- Federal Reserve -- Consumer Credit (G.19 Release)(opens in new tab)
- Freddie Mac -- Primary Mortgage Market Survey(opens in new tab)
- Consumer Financial Protection Bureau -- Explore Loan Options(opens in new tab)
- Investopedia -- Amortization Definition and Examples(opens in new tab)
Important Disclaimer
Disclaimer: The amortization examples in this guide use hypothetical loan scenarios for educational purposes. Your actual loan terms, interest rate, and amortization schedule depend on your creditworthiness, lender, loan type, and market conditions. This content is for educational and informational purposes only and does not constitute financial, tax, or legal advice. Individual circumstances vary, and you should consult with a qualified financial professional or your lender before making financial decisions. While we strive for accuracy, laws, regulations, and market rates change frequently. We do not recommend specific lenders, loan products, or refinancing companies. Data current as of August 2026.
Content reviewed by Mark at Markco Labs. Learn more about our accuracy standards.