What is a loan amortization table?
An amortization table is a month-by-month breakdown of your loan payments. It shows exactly how much of each payment goes toward interest and how much goes toward reducing principal. Early in most loans, interest takes a larger share of each payment. Over time, that flips, and more of each payment starts paying down the balance.
How this loan calculator works
This calculator uses standard fixed-rate loan math to estimate your required monthly payment, total interest paid, and payoff timeline. It also generates a detailed amortization schedule so you can see every payment from start to finish.
Inputs you can control
- Loan Amount: The amount you borrow.
- Annual Interest Rate: The APR used to calculate monthly interest.
- Loan Term: Number of years to repay the loan.
- Extra Monthly Payment: Additional amount paid each month to reduce principal faster.
- First Payment Month: Helps project the payment timeline by month and year.
Why extra payments matter
Even a small extra payment can create meaningful savings. Because interest is charged on outstanding principal, reducing the balance earlier lowers future interest charges. In many cases, adding just $50 to $200 per month can shave years off a mortgage or personal loan.
How to read the amortization schedule
- Payment: Total amount paid that month.
- Principal: Portion that reduces your loan balance.
- Interest: Cost of borrowing for that month.
- Extra: Amount above the required payment applied to principal.
- Balance: Remaining loan amount after the payment is applied.
Practical tips for better borrowing decisions
1) Compare scenarios before signing
Test different interest rates and terms to understand long-term cost. A lower monthly payment can still be more expensive overall if the term is much longer.
2) Use extra payments strategically
If your lender allows penalty-free prepayments, adding extra principal can be one of the safest guaranteed “returns” available—because it reduces future interest.
3) Recalculate after rate changes or refinancing
If you refinance or modify your loan, run a new amortization plan to see how your timeline and interest totals change.
Frequently asked questions
Does this work for mortgages, auto loans, and personal loans?
Yes. Any fixed-rate installment loan can be modeled with this calculator.
What if my rate is 0%?
The calculator handles 0% loans by dividing principal evenly across all monthly payments.
Are taxes, insurance, or fees included?
No. This calculator focuses on principal and interest only. Add escrow items separately if you want full monthly housing cost projections.