People type this into search every day: debt snowball vs avalanche.
You are picking an order. The monthly cash stays the same. The queue changes. The Consumer Financial Protection Bureau already named both methods, and it leaves the choice to you.
Two queues, same cash
The CFPB’s note on how to reduce your debt lists two basic strategies.
Highest interest rate method (avalanche): keep paying every account, then send leftover money to the debt with the highest APR. When that one is gone, roll the payment onto the next highest rate.
Snowball method: keep paying every account, then send leftover money to the smallest balance. When that one is gone, roll the payment onto the next smallest balance.
The CFPB’s reducing debt worksheet puts the tradeoff in one line each. Avalanche “can save you money” because you cut the most expensive debt first. Snowball can create momentum because small balances disappear sooner. The same worksheet notes that snowball “may pay more in total because you are not necessarily eliminating your most costly debt first.”
Neither method asks you to skip a bill. You stay current on every account, and the only choice is where the extra dollars go.
What the calculator actually does
The debt snowball vs avalanche calculator compares those two orders on two debts and one monthly payment.
Each month it adds balance × APR ÷ 12 as interest on each debt. Then it sends the whole payment to the debts in order. Avalanche sorts by APR, highest first. Snowball sorts by balance, smallest first. Leftover cash after the first debt is gone that month hits the second one.
This is a planning model. It will not match a statement to the penny. Card issuers often use a daily average balance, which the CFPB explains in its note on how card interest is calculated.
In real life, send each lender at least the minimum so you do not pick up late fees. Then put the extra on the target. The calculator is measuring the order, and it assumes you stop borrowing.
What the defaults look like
Here are the calculator defaults:
- smaller debt: $3,200 at 8%
- larger debt: $9,800 at 22%
- total monthly payment: $650
That 22% sits in the range the Fed is publishing. The G.19 consumer credit release dated October 7, 2026 puts the commercial-bank card APR at 21.19% on all accounts. For accounts that were actually charged interest, the rate is 22.36%. The 24-month personal loan average in the same table is 11.90%, so the 8% default is a cheaper installment-style rate, not that average.
First month interest on the small debt: 3200 × (0.08 ÷ 12) = $21.33
First month interest on the large debt: 9800 × (0.22 ÷ 12) = $179.67
Together that is $201.00 before any payment lands.
Month 1 under each order
Snowball sends the $650 to the $3,200 balance.
After interest and the payment, that smaller debt is $2,571.33. The $9,800 debt was not paid this month, so it grows to $9,979.67.
Avalanche sends the $650 to the 22% balance.
After interest and the payment, that larger debt is $9,329.67. The 8% debt was not paid this month, so it grows to $3,221.33.
Same $650 and the same $201 of new interest, then two different leftover balances.
Run both plans to the end
Keep the $650 fixed and add no new charges.
Avalanche finishes in 24 months. Total interest: $2,259.01. The 22% debt is gone in month 18. In that month the leftover $123.62 starts cutting the 8% balance. Months 19 to 24 put the full payment on what is left.
Snowball finishes in 25 months. Total interest: $3,170.63. The $3,200 debt is gone in month 6. The 22% balance has grown to $10,293.20 by then, because it sat and accrued for five full months plus a leftover payment in month 6.
The calculator’s published result is Avalanche, saving $911.63, because the 22% balance gets extra principal 18 months earlier.
When the two methods agree
Swap the rates. Keep $3,200 and $9,800. Put 22% on the small debt and 8% on the large one.
Both methods now target the same account first. Interest is $1,133.65 either way. Payoff time is 22 months either way. The calculator still prints Avalanche, with an estimated saving of $0.00, because the two interest totals match.
The gap comes back when the smallest balance is not also the highest APR. Same balances, $650 a month, 21% on the small debt and 22% on the large one: avalanche interest $3,252.02, snowball interest $3,329.99. The saving is $77.97, and both plans take 26 months.
A larger payment cuts both bills
Same defaults, $800 a month instead of $650.
Avalanche: 19 months, $1,777.48 of interest.
Snowball: 20 months, $2,445.20 of interest.
The extra $150 a month removes 5 months from avalanche and 5 months from snowball. Avalanche still costs less, by $667.72.
The CFPB’s three-year payoff box explainer says the same thing on a single card: you only have to pay the minimum, and the more you pay each month, the less interest you pay over time.
One card, or one installment loan
If you only have one revolving balance, order does not apply. Open the credit card payoff calculator with that statement balance, the purchase APR, and a payment you can repeat.
The $9,800 at 22% by itself, paid $650 a month, finishes in 1 year 6 months with $1,776.38 of interest. That ignores the second debt. The two-debt avalanche plan costs $2,259.01 because the 8% balance is still sitting there while you attack the card.
On an installment loan the extra is a line item. The early loan payoff calculator uses these defaults:
- remaining balance: $18,000
- rate: 8.5%
- remaining term: 48 months
- extra: $100
Scheduled payment: $443.67. Add $100 and it finishes in 38 months. Time saved: 10 months. Interest saved: $711.10.
My advice is to pick the order you will actually follow, then test the highest payment you can repeat. Open the debt snowball vs avalanche calculator with the two balances, the two APRs, and that payment.