Debt Payoff Planner (snowball vs avalanche)
Enter your debts and one extra monthly amount, then watch the two proven payoff methods race. See your debt-free date, the total interest, how much one method saves over the other, and the exact order your debts fall. Free, instant, and private - nothing you type leaves your browser.
Highest interest rate first - pays the least total interest.
On top of every minimum. This is the money the method puts to work - your total payment is$965/mo (all minimums + extra).
You'll be debt-free in
0 months
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- Total interest
- $0
- Total you pay
- $0
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Payoff order
Estimate only - not financial advice. Assumes fixed rates and minimums and an equal payment every month; your lender's exact terms govern. See notes below.
How this planner works
Both the snowball and the avalanche follow the same five moves. The only thing they disagree on is which debt gets attacked first - and that one choice decides how much interest you pay and how fast you feel progress.
- 1. Pay every minimum, always. The minimum payment (the smallest amount each lender requires each month) is the floor, not the strategy. Miss one and you get late fees and credit-score damage. Both methods assume every minimum is covered first.
- 2. Add your extra. Whatever you can pay beyond the minimums is the fuel. Even a small extra amount shortens the payoff dramatically, because it goes straight at principal (the amount you actually borrowed) instead of interest.
- 3. Pick a target. The avalanche sends the extra to your highest APR (annual percentage rate - the yearly cost of borrowing). That is the mathematically cheapest order. Thesnowball sends it to your smallest balance, so you clear a whole debt sooner for a motivational win.
- 4. Roll over freed payments. When a debt hits zero, its old minimum joins your extra and rolls onto the next target. Your attack grows with every payoff - which is why the last debts fall much faster than the first.
- 5. Repeat until zero. Keep the total payment steady and move down the list. The calculator simulates this month by month for both methods so you can compare the debt-free date and the total interest before you commit.
Interest is added each month at your APR divided by 12, then your payment is applied - the same math any loan calculator uses. The example debts are illustrative (the average US credit card charged about 21.5% in early 2026, per the Federal Reserve); replace them with your own for a real plan.
The honest trade-off
The avalanche always wins on paper - it pays the least total interest, because it kills your most expensive debt first. The snowball often wins in real life, because clearing a whole debt early is a jolt of momentum that keeps people going. For many debt mixes the difference in interest is small, and the best method is simply the one you will finish. When your highest-rate debt is also your smallest, the two methods agree completely - the planner will tell you when that happens.
Frequently asked questions
What is the difference between the debt snowball and the debt avalanche?
Both methods pay the minimum on every debt and send every spare dollar to just one debt at a time. The only difference is which debt goes first. The avalanche targets your highest interest rate (APR) first, which pays the least total interest. The snowball targets your smallest balance first, which clears a whole debt sooner and hands you an early win. This tool runs both so you can see the real gap for your own debts.
Which method should I pick?
If you want the lowest cost, pick the avalanche - it is mathematically the cheapest order, so it always pays the least interest. If staying motivated is the hard part, the snowball's quick first win keeps many people going, and the extra interest is often small. The honest answer: the best method is the one you will actually finish. Look at both numbers above, then choose.
What is the "rollover", and why do the last debts fall so fast?
When a debt is paid off, its minimum payment does not leave your budget - you roll it onto the next target, on top of your extra. So the amount attacking each debt grows every time one is cleared, which is why your last debt falls far faster than your first. Both methods use this, and it is where the "snowball" gets its name.
What if my minimum payments are already more than I can afford?
Then payoff strategy is not your first problem - cash flow is. Look at lowering the payments themselves (a lender hardship plan, refinancing, or a nonprofit credit counselor) before choosing snowball vs avalanche. If the calculator says your debts never clear, your total payment is not even covering the interest, so the balance will keep growing until the payment goes up.
Should I build an emergency fund first, or pay off debt first?
A common middle path: save a small starter emergency fund (about $1,000, or one month of essentials) so a surprise bill does not send you straight back to the card, then attack the debt hard. Paying off a high-interest debt is a guaranteed return equal to its APR - a 22% card is very hard to beat by investing - so high-rate balances usually come before extra investing.
Is this an exact payoff schedule?
It is a close estimate. It assumes fixed interest rates, fixed minimum payments, and that you send the same total every month. Real cards can change your APR or minimum, and interest is charged on your daily balance rather than once a month, so your actual payoff date may shift a little. Use it to compare methods and set a plan, not as a lender statement.
Go deeper: debt guides
Short, plain-English guides on getting out of debt for good.
Debt avalanche vs snowball
The two methods side by side, and how to pick the one you'll actually finish.
How to pay off credit card debt
A step-by-step plan for high-interest cards, from budget to payoff.
Debt consolidation, explained
When rolling several debts into one loan helps - and when it just hides the problem.
Balance transfer cards, explained
How a 0% intro APR works, what the fee costs, and the trap to avoid.
Good debt vs bad debt
Why a mortgage and a payday loan are not the same kind of borrowing.
Debt-to-income ratio, explained
The number lenders use to size you up, and how to improve it.
Sources & last reviewed
Method and figures last reviewed July 3, 2026 by Shivam Rai. This is an estimate, not financial advice - your lender's exact rates, minimums, and fees govern your real payoff.
- Consumer Financial Protection Bureau - how to pay off debt, incl. the highest-rate-first and lowest-balance-first methods (consumerfinance.gov)
- Federal Reserve G.19 Consumer Credit report - average APR on credit card accounts assessed interest was 21.52% in Q1 2026 (federalreserve.gov/releases/g19)
- Standard amortization math - interest per month = balance x APR / 12; the same closed-form used by any loan calculator.