Enter your debts, choose a payoff strategy, and add any extra monthly payment to see your debt-free date, total interest cost, and the order each debt gets paid off.
Your Debts
Debt 1
$
%
$
Payoff Strategy
$
Added on top of all minimums, directed to your priority debt.
Payoff Plan
Debt-free date—
Total debt entered$0.00
Total interest paid$0.00
Payoff order—
Time to Debt-Free
—
Total Interest
$0.00
Total Debt
$0.00
Results are estimates. Actual payoff depends on lender terms, minimum payment changes, and payment timing. Not financial advice.
About the Debt Payoff Calculator
Managing multiple debts is more than just making minimum payments — it is about choosing the right strategy and applying any extra money where it has the biggest impact. This calculator simulates month-by-month payoff for up to eight debts simultaneously, rolling each paid-off debt's minimum payment into the next target automatically, so you can see your exact debt-free date and total interest cost for both Snowball and Avalanche strategies.
How the Calculation Works
Each month the calculator:
Accrues monthly interest on every active debt (APR ÷ 12 × balance)
Applies the minimum payment to every debt
Directs any extra payment to the priority debt (lowest balance for Snowball, highest APR for Avalanche)
When a debt reaches zero, rolls its minimum payment into the extra payment pool for future months
This continues until all debts are paid off or 50 years has elapsed.
Formula
Monthly Interest = Balance × (APR / 12)
Updated Balance = Balance + Monthly Interest − Minimum Payment
Extra Applied = min(Extra Pool, Priority Debt Balance)
Rolled Extra = Extra Pool + Paid-Off Debt's Minimum Payment
Snowball vs. Avalanche — Which Should You Choose?
Method
Priority
Best For
Debt Avalanche
Highest APR first
Minimizing total interest — the mathematically optimal approach
Debt Snowball
Lowest balance first
Staying motivated — quick wins help build momentum
When to Use This Calculator
Credit card payoff planning — see exactly when each card is paid off and how much interest you will pay in total
Comparing payoff strategies — run the calculator in both Avalanche and Snowball modes to see the interest and time difference
Evaluating an extra payment — add $50, $100, or $200 in extra monthly payment and see how much sooner you become debt-free
Budgeting extra income — decide whether to apply a bonus, tax refund, or side income to debt using the extra payment field
Setting a debt-free goal — use the payoff date as a motivating target; pair with the Savings Goal Calculator once your debt is cleared
This calculator estimates payoff based on fixed minimum payments, APRs, and consistent extra payments. Actual lender terms, variable rates, promotional periods, fees, and changes in minimum payments will affect real-world results. Results are for planning and comparison purposes only, not financial advice.
Frequently Asked Questions
What is the difference between debt snowball and debt avalanche?
Debt Snowball targets the lowest-balance debt first regardless of interest rate. Once it's paid off, its minimum payment rolls into the next smallest debt, creating a growing payment 'snowball.' Debt Avalanche targets the highest-APR debt first, which mathematically minimizes total interest paid. Snowball builds psychological momentum through quick wins; Avalanche saves more money overall but requires patience with slower initial progress.
Which debt payoff method saves the most money?
Debt Avalanche almost always saves the most money in total interest, because it eliminates high-rate debt fastest. However, if the difference in payoff time between methods is small, the psychological benefit of Snowball wins may be worth the modest extra cost. You can use this calculator to compare both strategies side by side and see the actual dollar difference.
How much faster can I get out of debt by paying extra each month?
Even a small extra payment each month can dramatically reduce payoff time. An extra $100/month on a $10,000 credit card at 22% APR can shave years off your timeline and save thousands in interest. Enter an extra payment amount in the calculator and compare the payoff date with and without it to see the impact.
Why do minimum payments keep me in debt for so long?
Credit card minimum payments are typically set at 1–3% of the balance, which is just barely above the monthly interest. Most of each payment goes to interest, not principal, so the balance falls extremely slowly. As the balance decreases, the minimum payment also decreases, further slowing progress. Any extra payment beyond the minimum goes entirely to principal, which is why it has such an outsized impact.
Can I use this calculator for credit cards and loans together?
Yes. Enter any type of debt — credit cards, personal loans, auto loans, student loans, or medical debt — as separate rows. The calculator handles all of them together in the same payoff simulation. Just make sure each row has the current balance, annual interest rate (APR), and minimum monthly payment.
What happens if my payments do not cover monthly interest?
If your total minimum payments plus any extra payment don't exceed the monthly interest accumulating across all your debts, your balances will grow every month instead of shrinking. The calculator will show a warning in this case. To fix it, add an extra monthly payment or manually increase one or more minimum payments.
Should I pay off debt or save money first?
A common rule: prioritize paying off debt with an APR higher than what you could earn by investing or saving. If your credit card charges 20% APR and a savings account pays 4.5%, paying down the card is a guaranteed 20% return. After eliminating high-rate debt, redirect that money to savings or investing. Always maintain a small emergency fund — even $500–$1,000 — before going all-in on debt payoff.
