Debt Payoff Calculator
Debt has a finish line — most people just never see it because minimum payments barely move the balance. Enter your numbers and an extra amount to watch the date jump closer.
Your results
Charts & visualization
Balance decline compared
The widening gap shows how much faster extra payments retire debt.
Every chart’s underlying numbers are available as text — use the “view as table” control under each chart.
How it works
The calculator runs one fixed-payment schedule twice — once at your current payment, once with your extra added. Each month, interest accrues at APR ÷ 12 on the remaining balance and the rest of the payment reduces it. The difference between the two runs isolates precisely what your extra dollars buy: fewer months and less interest.
If your current payment cannot cover the monthly interest, the result flags it — that situation produces a balance that grows instead of shrinks.
Formula used
r— monthly rate = APR ÷ 12 ÷ 100Accelerated payment— current payment + extraDebt-free date— when the accelerated balance reaches zero
Example calculation
At $250 per month, $12,000 of 18.9% debt takes about 7 yrs 7 mo months to clear and accrues nearly $10,567 of interest. Adding just $100 more finishes in 4 yrs 2 mo — saving roughly $5,174. The first few months still feel slow because interest takes about $189 immediately; persistence is where the savings live.
Assumptions & limitations
- A single blended APR represents combined debts; use the snowball tool for multiple precise debts.
- Payments remain fixed throughout the plan.
- No new charges added to the debt during payoff.
- On-time payments assumed; fees excluded.
Results are planning estimates based on your inputs and the stated assumptions — not financial advice or a loan offer. Verify important figures with your lender or advisor.
Frequently asked questions
What is the fastest way to pay off debt?
Fix a payment as far above the minimums as your budget allows, direct it at the highest-APR balance, and stop adding new charges. The calculator quantifies why: every extra dollar shortens the schedule permanently.
Should I save or pay off debt?
Cover a small starter emergency fund first so surprises do not become new debt, then prioritize balances with APRs above roughly 8%, where guaranteed “returns” from avoided interest beat most investments.
Does paying extra really change my payoff date that much?
Yes — extra payments compound because they permanently reduce the balance that future interest charges against. A $100 extra on the example above removes years, not months.
What if my payment is below the monthly interest?
The balance grows forever — the calculator flags this explicitly. The fixes are larger payments, a lower rate via transfer or consolidation, or hardship programs from the lender.