Generate a full amortization schedule showing principal, interest, and balance for every payment of any loan.
Enter loan details to see the full breakdown of principal and interest over time
Your total monthly payment stays the same throughout the loan term.
Early payments are mostly interest; later payments are mostly principal.
As principal is paid down, your equity in the asset grows steadily.
Cross-checked against authoritative formulas (IRS, NIST, ACM) and updated for 2025/2026 tax years and rates.
No server roundtrip. All math runs in your browser so results appear the moment you finish typing.
We never collect, store, or transmit your inputs. Every calculation runs locally in your browser.
Each calculator includes the formula, plain-English explanation, and FAQs so you understand the result.
Estimates only. Calculator results are for educational and planning purposes — not professional advice. For binding decisions on taxes, investments, health, or legal matters, consult a qualified professional.
FAQ
Everything you need to know about this calculator. Can't find what you're looking for? Email our team.
Each loan payment splits between principal and interest. Early payments are mostly interest; later payments are mostly principal. For a $300,000 30-year mortgage at 7%, the first payment is $1,996 - $1,750 interest, $246 principal. By year 15, the split is roughly even. By year 30, the final payment is almost all principal. Our amortization calculator shows this for every month of your loan.
How it works
Our amortization calculator lets you generate a full amortization schedule showing principal, interest, and balance for every payment of a loan.
Type the principal you are borrowing - the loan amount after any down payment.
Type the annual rate as a percentage. The calculator divides it by 12 to get the monthly rate used in the schedule.
Type the loan length in years. A 30-year mortgage has 360 monthly payments; a 5-year auto loan has 60.
The calculator displays a full amortization table with payment number, principal portion, interest portion, and remaining balance for every month.
Learn how loan amortization works, why early payments are mostly interest, and how to save money on your loan.
Learn what APR is, how it differs from interest rate, and why it matters for loans and mortgages.
Understand how the time value of money principle underlies all amortization calculations.