Financial calculators

Loan repayment calculator

Compare a fixed-rate loan with extra monthly principal payments, estimated payoff time and interest saved.

Calculated on your device

Loan principal

Annual nominal rate (%)

Original term (months)

1–600 monthly payments. Fractional years must equal whole months.

Original term unit

Extra monthly principal payment

Currency

Find a currency

Currency sets the money unit. It does not convert exchange rates.

Starting values are an example. Planned monthly payments include your extra amount; the actual final payment is capped at the amount owed. No lender rates or fees are fetched.

Try the original loan without extra payments, then Undo to recover your scenario.

Planned monthly payment including extra: —
Original monthly EMI: —
Estimated payoff time: —
Estimated interest saved: —
Interest with extra payments: —
Actual capped final payment: —

Calculate to see your result.

Original loan versus extra payments

Original total interest
Original total repayment
Repayment with extra payments

Before payment 1

Dashed: original scheduleSolid: with extra payments

Balances are shown after each payment. Once the loan is paid off, its balance stays at zero. The final payment is capped at the amount owed, including that month's interest.

Explore both repayment schedules

Choose a payment range

On narrow screens, payments stack so every amount remains visible.

Repayment schedule with extra payments
Month	Payment	Interest	Principal	Balance

The main repayment CSV always contains the adjusted schedule. The original-schedule download provides the comparison baseline. Both include the loan assumptions and every payment with numeric amounts rounded to six decimals; this table follows currency precision.

Defaults are illustrative. Final payment is capped at the balance plus that month’s interest. Currency formats only.

Compare monthly extra payments

Enter the principal, fixed annual nominal rate and original term.
Enter an extra amount to apply to principal at the end of every month, starting with the first payment.
Compare balance curves, payoff time and interest, browse both schedules and download the adjusted or original payments.

Model and example

The base payment uses the same monthly reducing-balance formula as the EMI calculator. Each month accrues interest at annual rate ÷ 1,200 on the opening balance. The scheduled payment plus extra then reduces the balance; the final payment clears only the amount owed.

A 1,200-unit loan at 0% over 12 months has a base payment of 100. Adding 50 monthly repays it in 8 months. Interest saved is zero because no interest is charged.

The CFPB amortization explanation describes principal and interest allocation. Its payment-allocation guidance explains why actual fees and payment rules matter.

Assumptions and limits

Fixed rate, equal monthly periods and end-of-month payments. Extra payments immediately reduce principal after current interest, without fees or penalties. The original monthly payment stays fixed; this model shortens the term rather than recasting the loan. It excludes taxes, fees, daily interest, arrears, rate changes, lump-sum or irregular prepayments. Confirm your agreement’s rules before making payments.

Principal 0.01–1 trillion units; rate 0–100%; original term 1–600 whole months; extra 0–1 trillion per month. An extra amount above the balance is capped in the final payment. Estimates are not advice or lender quotes. CSV uses six decimals; displayed rounding may differ from your lender.

Privacy and export

Inputs and schedules stay in browser memory without uploads or saved financial values. CSV contains every adjusted payment, opening/closing balances, principal and interest. Both downloads include the original loan amount, annual nominal rate, original term, scenario extra amount and schedule identity on every payment. Editing inputs clears stale results. Reset restores illustrative defaults. Undo last action restores your raw inputs, currency search, accepted result, selected schedule and payment range after Reset or choosing no extra payments. Editing an input discards that recovery step.

Can I use an existing loan balance?

Enter the remaining balance and remaining term only if the calculated base payment matches your agreement. This tool recalculates the base payment from those inputs; it does not use a custom contractual EMI.

Why might interest savings differ?

Actual payment dates, penalties, allocation rules, rounding or variable rates can change savings. This model assumes immediate principal reduction with each extra monthly payment.