Debt Snowball Calculator
List every debt, add whatever you can pay above the minimums, and see the payoff order, your debt-free date and the total interest — with a side-by-side avalanche comparison.
Your debts
Balance, annual interest rate and the minimum payment for each one.
Total owed $16,600 · minimums $460/mo · you pay $760/mo
Your snowball plan
Debt-free in
2 years
August 2028
Total interest
$1,580
on $16,600 of debt
Payoff order
- 1Store cardgone in 3 months
- 2Credit cardgone in 1 yr 1 mo
- 3Car loangone in 2 years
Avalanche comparison. Paying the highest rate first clears the same debts in 2 years with $1,580 of interest — no cheaper than the snowball for your numbers.
What the extra $300 buys you. Minimums alone take 3 yr 10 mo and cost $4,073 in interest, so the extra payment saves 1 yr 10 mo and $2,492.
How the debt snowball works
You pay the minimum on every debt, then send every spare dollar to the smallest balance — not the highest interest rate. When that debt hits zero, its minimum payment joins the pile attacking the next smallest. Nothing gets absorbed back into everyday spending, so the payment rolling downhill keeps growing.
payment on target debt = extra + all minimums from debts already cleared
Snowball vs avalanche
The avalanche method orders debts by interest rate instead of balance, and it is always the mathematically cheaper option. The gap is usually smaller than people expect — often a few hundred dollars across several years. The snowball wins on behaviour: closing an account in month two is proof the plan works, and a plan you keep beats a plan you abandon. Use the comparison above to see the real cost for your own numbers, then pick the one you will actually finish.
Getting the inputs right
- Balance. Use today's statement balance, not the credit limit.
- Rate. The annual purchase APR. Promotional 0% periods that expire mid-plan will make the estimate optimistic.
- Minimum. Card minimums usually fall as the balance drops; this calculator holds them steady, which is close to what you will pay anyway once the snowball is running.
- Extra payment. Pick a number you can repeat in a bad month. Consistency matters more than size.
Running a snowball as a couple
One combined list clears debt faster than two parallel plans, because all the household's spare money hits a single balance at a time. Agree on the extra payment amount up front, keep the list somewhere both of you see it, and redirect every freed-up minimum on payday. If you split household bills unevenly, our guide to splitting expenses with a partner helps you work out how much each person can realistically contribute.
Debt snowball questions people ask
Should I stop saving while paying off debt?
Keep a small emergency buffer first. Without one, the next car repair goes straight back on the card you just cleared.
Do I include my mortgage?
Most people leave it out. Its balance is so much larger than the rest that it would sit last in the order anyway.
What if the payoff never finishes?
That means interest is outpacing your minimums. Increase the extra payment, or look at consolidating the highest-rate balance.
How do we track this month to month?
Log the payments as they happen. Nest tracks liabilities and savings goals in a personal or shared space, so both partners see the balance falling.
Keep the snowball rolling
A calculator gives you the plan once. Nest tracks your balances, payments and goals as you go — solo or with your partner — so the freed-up payment always finds its next target.
Start tracking in Nest