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Debt snowball calculator

Compare snowball and avalanche payoff methods, see the projected payoff order, and understand how extra payments change the debt-free date.

Create a free account to save your results, track progress over time, and unlock guide-connected features.

Debt strategy assumptions

Mar 2029
Debt-free date
$3,352
Total interest paid
$3,685
Other strategy interest
$333
Interest difference

Debt strategy scenarios

Minimum only

49 months

$4,959 estimated interest if no extra payment is used.

Current plan

34 months

$3,352 interest with $250 extra per month.

Refinance test

33 months

Caps rates at 8% before fees. Interest changes by -$212 after transfer fee.

Income stress

36 months

20% lower extra payment extends timeline by 2 months.

Risk flags

Balance transfer/refinance fee may erase the interest saving.

Action plan

  1. 1. Keep total minimum payments of $640 automated before sending extra money to the active payoff debt.
  2. 2. Refinance does not beat the current plan under these assumptions.
  3. 3. A further extra $100 cuts the plan to 30 months.

Month-by-month payoff timeline

Debt-free countdown

34
Months remaining
2.8
Years remaining
Mar 2029
Estimated debt-free date

Interest cost breakdown

$8,959
Minimum-only interest estimate
$5,607
Extra payment interest saved
$50
Breakeven extra payment

Debt-by-debt payoff timeline

Full amortisation table: Credit card

MonthPaymentPrincipalInterestBalance
1$410$293$117$6,107
2$410$298$112$5,809
3$410$303$107$5,506
4$410$309$101$5,197
5$410$315$95$4,882
6$410$320$90$4,562
7$410$326$84$4,235
8$410$332$78$3,903
9$410$338$72$3,564
10$410$345$65$3,220
11$410$351$59$2,869
12$410$357$53$2,511
13$410$364$46$2,147
14$410$371$39$1,777
15$410$377$33$1,399
16$410$384$26$1,015
17$410$391$19$624
18$410$399$11$225
19$229$225$4$0

Interest saved comparison

$3,685
Snowball interest paid
$3,352
Avalanche interest paid
34
Snowball months to debt-free
34
Avalanche months to debt-free

Avalanche saves $333 in interest.

What-if scenarios

Extra $100
30 months / saves $392
Extra $200
27 months / saves $655
Extra $500
21 months / saves $1,272

At minimum payments, Credit card clears in 73 months and costs $5,241 in interest.

At minimum payments, Personal loan clears in 57 months and costs $2,785 in interest.

At minimum payments, Car finance clears in 41 months and costs $934 in interest.

Payoff order

  1. 1. Credit cardJan 2027
  2. 2. Personal loanApr 2028
  3. 3. Car financeMar 2029

How to use the debt payoff planner

Add each debt with its balance, interest rate, and minimum monthly payment, then enter any extra amount you can put toward repayment. The strategy toggle compares avalanche and snowball logic using the same monthly budget.

Avalanche usually minimises interest by attacking high-rate debt first. Snowball can feel more motivating because smaller balances disappear earlier. The best choice is the one you can follow consistently while still meeting all minimum payments.

The projections are simplified and assume rates, minimums, and extra payments stay stable. They do not include missed payments, promotional rate changes, fees, or settlement offers.