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How Our Debt Calculators Work
Enter your debts
Add your balances, interest rates, and minimum payments. Works with credit cards, student loans, car loans, medical debt — any type.
Choose a strategy
Pick from 6 methods — or try them all. Each calculator shows how that strategy orders your debts and what it costs in interest.
See your payoff plan
Get your debt-free date, total interest, month-by-month breakdown, and a side-by-side comparison with other methods.
Ready to actually pay off your debt?
These calculators show you the plan. The Payoff app helps you follow through — with AI coaching, payment tracking, milestone celebrations, and a strategy quiz that matches your personality.
Which Debt Payoff Strategy Is Right for You?
There's no single best way to pay off debt. The right strategy depends on your personality, your budget, and what keeps you motivated. Here's a quick guide to all six methods:
Snowball — Quick wins, big momentum
The debt snowball method pays off your smallest balance first. Each time you eliminate a debt, you roll that payment into the next one. Research shows this approach has the highest real-world success rate because the psychological wins keep you going.
Avalanche — Maximum interest savings
The debt avalanche methodtargets your highest interest rate first. It's the mathematically optimal approach — you'll pay the least total interest. Best for disciplined savers who are motivated by numbers.
Hybrid — Best of both worlds
The hybrid method uses a weighted score (60% interest rate, 40% balance size) to blend the benefits of both snowball and avalanche. You get some quick wins without sacrificing too much in interest savings.
Cash Flow Index — Free up cash fastest
The cash flow index methodprioritises debts by their payment-to-balance ratio. By eliminating debts that consume the most cash relative to their size, you free up monthly breathing room faster. Ideal if you're on a tight budget.
Highest Balance — Face the mountain
The highest balance method tackles your biggest debt first. Once the mountain is gone, everything else feels manageable. This works well when one large debt is causing most of your stress.
Deadline — Reverse-engineer your plan
The deadline calculatorflips the question: instead of “when will I be debt-free?”, you ask “how much do I need to pay to be debt-free by [date]?” Set a wedding, birthday, or retirement date and get the exact monthly payment required.
Not sure which to choose?
Try running your debts through all six calculators — it takes 30 seconds since your data carries over. Or download the free Payoff app and take the 60-second strategy quiz that matches you with the best method based on your personality and debt profile.
Frequently Asked Questions
What is the difference between snowball and avalanche?
The snowball method pays off your smallest debt first for quick psychological wins. The avalanche method targets the highest interest rate first to save the most money. Both accelerate your payoff — the best method depends on your personality.
Are these calculators really free?
Yes, 100% free with no signup required. All calculations happen in your browser — your financial data never leaves your device.
How accurate are the results?
The calculators use the same compound interest formulas that banks use. Results are accurate assuming your balances, rates, and payments stay consistent. For variable-rate debts, re-run the calculator when your rate changes.
How much extra should I pay each month?
Any extra helps. Even $25-50 per month can shave months off your debt-free date. Use the slider to experiment — results update in real time so you can find the sweet spot for your budget.
Can I use these calculators for any type of debt?
Yes — credit cards, student loans, car loans, personal loans, medical debt, mortgages, buy-now-pay-later, and any other debt with a balance and interest rate.
What if I want to track my progress over time?
These web calculators give you a snapshot. For ongoing tracking with payment logging, milestone celebrations, AI coaching, and progress charts, download the free Payoff app for iOS and Android.