Formulas and 2026 figures checked & updated: July 2026
Payoff Order (Avalanche)
How to Use the Debt Payoff Calculator
- Add each debt you're carrying, using the '+ Add a debt' button for each card or loan.
- Enter the balance, APR, and minimum monthly payment for every debt.
- Enter the extra amount you can realistically put toward debt each month above the minimums.
- Choose a strategy: avalanche (highest APR first) to minimize total interest, or snowball (smallest balance first) for faster early wins.
- Review the payoff order to see which debt clears first, second, and so on under your chosen method.
- Compare the strategy comparison panel to see how much interest and time the other method would cost or save.
- Check your debt-free date and total interest. Example: $22,000 spread across a 22.9% credit card, a 7.5% car loan, and a 12% personal loan, with $200 extra per month, becomes debt-free years sooner under either method than paying minimums only — and avalanche saves more interest by clearing the 22.9% card first.
What This Calculator Does
This Debt Payoff Calculator models paying off several debts at once, so you can see a real debt-free date instead of guessing. It runs two proven strategies — the debt avalanche (highest interest rate first) and the debt snowball (smallest balance first) — and shows how many months each takes, the total interest you'll pay, and the order your debts disappear.
The results are driven by the balance, APR, and minimum payment you enter for each debt, plus any extra amount you can put toward debt every month. As a benchmark, credit cards commonly carry APRs of 20%–25% while auto loans and personal loans are often in the 6%–15% range — the bigger that gap, the more the avalanche method saves versus snowball, because it targets the highest-rate balance first. Even a modest extra payment of $100–$300 a month can cut years off a payoff timeline, since every extra dollar goes straight to principal rather than interest.
People use this calculator when they're carrying multiple debts and deciding which to prioritize, when they want to know if a raise or windfall is better spent on debt versus savings, or simply to see how much interest an extra payment actually saves. It also compares your plan against making minimum payments only, so you can see exactly how much time and interest your extra payment saves — a comparison that's often the difference between staying in debt for a decade and being debt-free in a few years.
Formula
Balanceₘ₊₁ = (Balanceₘ × (1 + APR/12)) − PaymentₘPayments above the combined minimums are directed to one focus debt at a time. When a debt hits zero, its minimum payment rolls into the extra applied to the next debt.
- APRAnnual percentage rate on each individual debt
- ExtraAdditional monthly payment above all minimums
- FocusHighest APR (avalanche) or smallest balance (snowball)
Examples
Avalanche vs. snowball on $22,000 of debt
$6,000 card at 22.9%, $12,000 car loan at 7.5%, $4,000 personal loan at 12% — with $200 extra per month.
Avalanche pays the 22.9% card first and saves the most interest; snowball clears the $4,000 loan first for an early win. Both finish far ahead of minimum-only payments.
The power of the extra payment
Adding $200/month on top of minimums versus paying minimums only.
The extra payment can shave years off the timeline and save thousands in interest — because every extra dollar attacks principal directly.
Snowball order on four smaller debts
$800 store card at 26%, $2,500 credit card at 21%, $4,000 personal loan at 13%, and $9,000 car loan at 6%, with $150 extra per month using the snowball method.
Snowball clears the $800 balance first within a couple of months, delivering an early motivational win, then rolls that freed-up minimum into the $2,500 card — the full sequence finishes faster than making minimum payments alone, even though avalanche would save a bit more total interest.
Key Terms Explained
- Debt Avalanche
- Paying off debts from the highest interest rate down, which minimizes the total interest you pay.
- Debt Snowball
- Paying off the smallest balance first for quick wins and momentum, regardless of interest rate.
- APR (Annual Percentage Rate)
- The yearly cost of borrowing shown as a percentage, including the interest rate plus certain fees. APR lets you compare loans on an equal footing and is usually a bit higher than the plain interest rate.
- Minimum Payment
- The smallest amount a card issuer requires each month (often about 2% of the balance). Paying only the minimum maximizes interest and payoff time.
- Compound Interest
- Interest earned on both your original balance and previously earned interest, so growth accelerates the longer money stays invested.
- Emergency Fund
- Cash set aside — commonly 3–6 months of essential expenses — for unexpected costs, kept somewhere safe and easy to access.
Continue Your Financial Planning
Methodology
Each month interest accrues at APR ÷ 12 on every balance, minimum payments are applied, then any extra (plus freed minimums from cleared debts) is funneled to the focus debt. Avalanche targets the highest APR; snowball targets the smallest balance. The simulation repeats month by month until every balance reaches zero, tracking total interest paid and the payoff month for each debt.
Frequently Asked Questions
What is the difference between the debt snowball and debt avalanche?+
The debt avalanche pays off the highest-APR debt first, minimizing total interest — the mathematically cheapest path. The debt snowball pays off the smallest balance first for quick motivational wins. This calculator shows both so you can weigh money saved against momentum.
How does paying extra each month speed up payoff?+
Every dollar above the minimum goes straight to principal, shrinking the balance that future interest is charged on. When a debt is cleared, its minimum is rolled into the extra applied to the next debt — that snowballing is why payoff accelerates faster with each debt you clear.
Should I save or pay off debt first?+
A common path: build a ~$1,000 starter emergency fund, attack high-interest debt (credit cards at 18-25%), then build a full 3-6 month fund. Paying off a 22% card is a guaranteed 22% return — better than most investments.
Is my data saved anywhere?+
No. Everything runs in your browser and nothing is stored or transmitted. Refreshing the page clears your entries.
How can I get out of debt fast?+
The fastest path combines three things: paying more than the minimum on at least one debt each month, choosing avalanche or snowball consistently rather than switching methods, and directing any windfalls (tax refunds, bonuses) straight to principal. Cutting discretionary spending temporarily to free up extra payment room is usually more effective than trying to earn extra income, simply because it's faster to implement.
Is debt avalanche always better than debt snowball?+
Mathematically, avalanche almost always results in less total interest paid because it targets the highest-rate balance first. However, snowball can be more effective in practice for some people because clearing a small balance quickly provides a motivational win that helps them stick with the plan — the 'better' method is the one you'll actually follow through on.
How long does it take to pay off $20,000 in debt?+
It depends heavily on your interest rates and how much you pay each month beyond the minimums. At a blended rate around 15%–20% APR, paying only minimums can take a decade or more, while adding a few hundred dollars extra per month often cuts that to 3–5 years — this calculator shows the exact timeline for your specific numbers.
Can I save my results?+
Yes. Use “Save results” to store a snapshot. Without an account it remains in this browser. If you log in, saved scenarios sync securely to your SmartRates account so they are available on your other devices.
How do I share my calculation?+
Click “Share” in the toolbar to copy a link (or open your device’s share sheet). The link encodes your exact inputs, so whoever opens it sees the calculator pre-filled with the same numbers and the same result.
Can I email my calculator results?+
Yes. Click “Email results” to open your default email application with the current inputs, results, and calculator link already included. Review the message and choose the recipient before sending.
Can I export or print my results as a PDF?+
Yes. Click “Export PDF” to open a clean, printable summary of your inputs and results that you can save as a PDF or print. It includes a timestamp and a link back to the calculator.
How accurate are the calculator results?+
The arithmetic follows the formula and assumptions documented on this page. The result is still an estimate because actual rates, fees, taxes, timing conventions, eligibility rules, and provider calculations can differ. Use figures from your official quote, statement, contract, or tax form before making a financial decision.
Which inputs have the biggest effect on the result?+
Rate, time, starting balance, recurring payments or contributions, and fees usually have the largest effects. Change one input at a time to create a conservative, expected, and optimistic scenario instead of relying on a single forecast.
Are taxes, fees, and inflation included?+
Only when they appear as an input or are explicitly described in the methodology. Do not assume an omitted cost is zero. Review the formula and methodology sections to see exactly what is included before comparing the result with an outside quote.
Can this calculator predict future rates or returns?+
No. A calculator projects the assumptions entered; it cannot predict market returns, inflation, variable interest rates, tax-law changes, or provider decisions. Rerun the calculation with several assumptions to understand the range of possible outcomes.
Why might my lender, bank, broker, or tax software show a different result?+
Professional systems may use daily timing, transaction dates, compounding conventions, rounding rules, account-specific fees, credits, eligibility details, or regulations that a general-purpose calculator cannot know. A small difference can be rounding; a large difference usually means an assumption or included cost is different.
Disclaimer: Calculations are for informational purposes only and do not constitute professional financial advice. Please consult with a certified professional before making financial decisions.