Generate detailed loan amortization schedules showing principal, interest, and balance over time. Understand exactly how each payment is applied to your loan.
A homebuyer takes out a $350,000 mortgage at 6.5% annual interest for 30 years (monthly payments).
Monthly Payment: $2,212.67
Total Interest Paid: $446,561.20
Total Cost: $796,561.20
In the first year, approximately 78% of each payment goes toward interest. By year 25, the split reverses — over 80% goes to principal.
A car buyer finances $35,000 at 4.2% for 5 years (monthly payments).
Monthly Payment: $647.78
Total Interest Paid: $3,866.80
Total Cost: $38,866.80
Shorter loan terms mean less total interest. The same $35,000 at 4.2% over 6 years would cost $467 more in interest.
A borrower compares a $250,000 loan at 5.8% for 15 years vs 30 years.
15-Year Payment: $2,081.04/mo — Total Interest: $124,587.20
30-Year Payment: $1,466.75/mo — Total Interest: $278,030.00
The 15-year term saves over $153,000 in interest, though the monthly payment is about $614 higher.
Amortization is the process of spreading out a loan into a series of fixed payments over time. Each payment is split between principal (the original loan amount) and interest (the cost of borrowing). Early in the schedule, a larger portion of each payment goes toward interest; later, more goes toward principal.
The original amount of money borrowed. Your payments gradually reduce this balance over the loan term.
The annual percentage charged by the lender, expressed as a periodic rate for each payment interval.
The total time you have to repay the loan. Longer terms mean lower payments but more total interest.
A complete table showing each payment's breakdown into principal, interest, and remaining balance over the full loan term.
Use the amortization schedule to compare total interest costs across different loan terms. A shorter term saves thousands in interest.
Making one extra payment per year on a 30-year mortgage can reduce the payoff time by several years and save tens of thousands in interest.
Early payments are mostly interest. Understanding this helps you decide whether refinancing or extra payments make sense for your situation.
Switching to bi-weekly payments (26 half-payments per year) results in one extra full payment annually, accelerating payoff and reducing interest.
An amortization schedule is a complete table of periodic loan payments that shows the amount of principal and interest that comprise each payment until the loan is paid off at the end of its term. While each periodic payment is typically the same amount, the proportion that goes to interest versus principal changes over time — a process known as amortization.
Understanding your amortization schedule is crucial for making informed financial decisions. It reveals the true cost of borrowing, shows how much equity you're building over time, and helps you evaluate strategies like making extra payments or refinancing. Our Amortization Calculator provides a full, year-by-year breakdown so you can see exactly where your money goes every single payment period.
In the early years of a loan, a larger portion of each payment goes toward interest because the outstanding balance is at its highest. As the balance decreases over time, less interest accrues each period, allowing more of each payment to go toward the principal. By the end of the loan term, the vast majority of each payment goes directly to reducing the principal balance.
For example, on a $250,000 30-year mortgage at 6.5%, the first payment allocates about $1,354 to interest and only $226 to principal. By payment 180 (year 15), the split is roughly even. By the final payment, nearly all of it goes to principal. This front-loading of interest is why extra payments early in the loan term have such a dramatic impact on total interest savings.
Principal is repaid in equal installments while interest decreases over time. Common in commercial loans and some business financing.
The most common type for mortgages and consumer loans. Payments are fixed, with the interest-to-principal ratio shifting over time.
Only interest is paid for a set period, after which the loan converts to full amortization. Common in certain mortgages and bridge loans.
Payments are less than the interest due, causing the loan balance to grow over time. Generally not recommended for borrowers.
An amortization schedule is one of the most powerful tools for understanding your loan. Here's why you should use one:
See exactly how much interest you'll pay over the full life of the loan — the number that matters most when comparing loan offers.
Track exactly when you'll reach key milestones like 20% equity (important for PMI removal) or 50% paid off.
Compare different loan terms, payment frequencies, and extra payment scenarios to find the optimal strategy for your situation.
Mortgage interest is often tax-deductible. An amortization schedule helps you estimate your annual interest for tax purposes.
⚠️ Important Disclaimer: This Amortization Calculator is for informational and educational purposes only. It provides estimates based on standard amortization formulas and does not account for fees, taxes, insurance, private mortgage insurance (PMI), or other costs that may be part of your actual loan. Results should be verified with your lender or financial advisor before making any financial decisions. This calculator does not provide financial advice.