Debt Payoff at a Fixed Monthly Payment
Apply monthly interest, then the same payment, to one balance. Whether the payment exceeds interest determines amortisation; a long repayment period alone is not classified as impossible.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
Numbers stay on your device. Nothing is sent to a server.
How to use this tool
Enter USD balance, annual percentage and the payment you plan to make. The model assumes no new borrowing or late charges, so do not combine debts with different rates into an unsupported average.
Results and examples
Months include the final partial payment and interest is separated from principal. A payment not exceeding monthly interest means this balance does not shrink, not that all real-world remedies are unavailable.
Worked example
USD 1,000 at 1% annually with USD 2 monthly pays off in 648 months under the model.
Limitations
- Daily accrual, rate changes, new borrowing and fees are excluded.
- Creditor minimum-payment rules and negotiated arrangements are not modelled.
Fields
| Field | Guidance and constraints |
|---|---|
| Current balance | Accepted range: 0–10000000 · Input step: 50 |
| Annual interest rate | Accepted range: 0–80 · Input step: 0.1 |
| Monthly payment | Accepted range: 0–1000000 · Input step: 10 |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
Does exceeding 600 months mean impossible?
No. Mathematically amortising longer periods are calculated.
Is the final payment the same amount?
The calculation allows a smaller final payment for the remaining amount.
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