Debt Payoff Calculator
Plan the fastest, cheapest way out of debt — and see exactly when you'll be free.
Your Debts
Anything above the minimums. Even $50 makes a huge difference.
Debt-Free In
vs. the other strategy
Payoff Order
Debt payoff is a problem where the math and the psychology genuinely disagree, and pretending otherwise is why so much advice fails. The mathematically optimal strategy is to attack the highest interest rate first — the avalanche method — and it provably saves the most money. The strategy that people actually finish is often the snowball: clear the smallest balance first, regardless of rate, because closing an account produces a visible win that sustains motivation. This calculator shows you both. It tells you the real cost of your interest rates, how long each approach takes, and exactly what the emotional route costs you in dollars, so you can make that trade with your eyes open rather than by accident.
How the calculator works
Enter each debt with its balance, interest rate, and minimum payment, then add whatever extra amount you can put toward debt each month. The calculator simulates the payoff month by month: minimums go to every account, the extra goes to a single target debt, and when that debt clears, its entire payment rolls onto the next one. That rolling is what accelerates the process — the monthly payment stays constant while the number of debts shrinks, so each successive payoff arrives faster than the last.
The method
Each month:
Interest = Balance × (Annual rate ÷ 12)
Balance = Balance + Interest − Payment
Avalanche: extra payment → highest interest rate first
Snowball: extra payment → smallest balance first
When a debt clears, its payment rolls to the next target.Note that interest is charged on the balance before your payment lands, which is why minimum payments feel so futile on high-rate cards. A $5,000 balance at 22% APR accrues about $92 in interest each month. If your minimum payment is $100, only $8 touches the principal — you would need roughly 30 years to clear it. That is not a flaw in your discipline; it is the product working as designed.
What to know about paying off debt
- 1Avalanche saves money, snowball finishes plans. Run both here and look at the gap. If avalanche saves $340 over the full term, that is a modest price for a method you will actually complete. If it saves $4,000, the math deserves to win. Let the actual number decide rather than a rule someone repeated on the internet.
- 2Any debt above roughly 8–10% interest should be paid before investing extra money. Paying off a 22% credit card is a guaranteed 22% return, tax-free and risk-free — an outcome no legitimate investment can promise. This is the rare case where the safe choice is also the highest-returning one.
- 3Balance transfers are a tool, not a solution. A 0% introductory rate for 18 months can genuinely accelerate payoff, but only if you clear the balance before the promotional period ends and do not treat the freed-up card as new spending capacity. Otherwise you have paid a 3% transfer fee to reorganize the same problem.
- 4Always keep paying minimums on everything. Missing a minimum on a debt you are not targeting triggers late fees, penalty APRs that can exceed 29%, and credit damage — wiping out any progress the extra payment was making elsewhere.
- 5Attack the cause alongside the balance. If the debt grew from an unstable income or a missing emergency fund, paying it off without fixing that means the next unexpected car repair rebuilds it. A small buffer of even $1,000 held aside while paying down debt is not a distraction; it is what stops the cycle restarting.
Frequently asked questions
Which is better, the avalanche or the snowball method?
Avalanche always wins on paper, since attacking the highest rate minimizes total interest. Snowball wins in studies of actual human behavior, because early visible wins keep people going. The honest answer is to run both and look at the difference. When the gap is small, take the method you will finish. When it is large, take the money. The worst outcome is a mathematically perfect plan you abandon in month four.
Should I pay off debt or build savings first?
Build a small emergency buffer first — around $1,000, or one month of essential expenses — then attack the debt aggressively, then build the full fund. Without any buffer, the first unexpected expense goes straight back onto the card and undoes months of work. With too large a buffer, you are holding cash earning 1% while paying 22% elsewhere, which is a guaranteed loss.
Does paying off debt help or hurt my credit score?
Paying down balances helps significantly, since credit utilization is one of the largest scoring factors and lower balances raise your score. Closing the account afterward can hurt slightly by reducing your available credit and, eventually, your average account age. The usual advice is to pay the card off and leave it open with no balance rather than closing it out of symbolism.
Can I negotiate my interest rate?
More often than people expect, and it costs one phone call. Card issuers would rather reduce your rate than lose a paying customer to a balance transfer, particularly if you have paid on time for a year or more. Ask directly for a rate reduction and mention competing offers. A drop from 24% to 18% on a $6,000 balance saves roughly $360 a year for about ten minutes of effort.
Is debt consolidation worth it?
It depends entirely on whether the new rate is genuinely lower and whether you stop borrowing. Consolidating five cards at 22% into one loan at 11% halves your interest and simplifies the payment — that is real. Consolidating and then running the cards back up is how a manageable problem becomes an unmanageable one, and it is common enough that lenders count on it. Watch for origination fees and longer terms that lower the monthly payment while raising the total paid.