Budget & Credit · payoff planner

Debt Payoff Calculator

Plan your way out of debt with a real month-by-month simulator: up to 20 debts, snowball vs avalanche vs custom order, the fixed-total roll-down toggle, scheduled extra payments, and an honest minimum-only baseline — including “Never” when minimums cannot win. Solve the payment a debt-free date requires, and export the whole plan as a 10-sheet Excel workbook. Works in any currency.

Transparent assumptions Not a payoff quote Up to 20 debts Download XLSX Works on any device
Plan my payoff How the math works

Confirm your actual payoff with your lender — full formula shown.

Avalanche pays the highest-APR debt first and costs the least interest when APRs are fixed; snowball pays the smallest balance first and wins motivation. Expiring promo rates can change the cheapest order — the comparison table shows your actual gap. Either way, the two biggest levers are the same: pay more than the minimums, and keep your total payment fixed as each debt clears so freed minimums roll into the next target. This calculator simulates all of it month by month and shows your exact debt-free date.

Calculator

Interactive debt payoff calculator

Avalanche4 active debts

Everything runs in your browser — nothing you type is stored or sent anywhere. Do not enter account numbers or personal identifiers; debt names like “Visa card” are enough.

Formats the numbers only — lender rules vary by country.

Your debts (4/20)

$
%
$
More options (promo APR, monthly fee)
%

E.g. 0% balance transfer.

0 = no promo. Standard APR applies afterwards.

$

Added to the balance each month.

$
%
$
More options (promo APR, monthly fee)
%

E.g. 0% balance transfer.

0 = no promo. Standard APR applies afterwards.

$

Added to the balance each month.

$
%
$
More options (promo APR, monthly fee)
%

E.g. 0% balance transfer.

0 = no promo. Standard APR applies afterwards.

$

Added to the balance each month.

$
%
$
More options (promo APR, monthly fee)
%

E.g. 0% balance transfer.

0 = no promo. Standard APR applies afterwards.

$

Added to the balance each month.

Targets highest APR.

Roll-down behaviour

Payment budget

$

On top of $645 in minimums.

More extras (yearly bonus, one-time, limited-time)
$

1 = January … 12 = December.

$

1 = next month.

$

Debt-free date

43 months

January 2030

3.6 years from now under avalanche with a fixed total payment.

Total interest

$4,305.39

Total paid: $33,805 on $29,500 of debt.

vs minimum-only

68 mo sooner

$4,047 less interest than paying minimums.

First debt cleared

Month 7

Store card — your first win.

Adding $100/month

6 mo / $724

Months and interest saved by one extra payment habit.

What your numbers say

  • Your highest-cost debt is Store card at 27% APR — every extra unit aimed there saves the most interest.
  • Snowball and avalanche cost almost the same here — order by motivation, not math.
  • Snowball clears its first debt (Store card) in month 7 — the early-win effect.
  • Your plan beats minimum-only by 68 months and $4,047 of interest.
  • Adding $100 per month would save another 6 months and $724 of interest.

Educational observations — not financial, credit, or debt advice. If debt feels unmanageable, a qualified nonprofit credit counselor can help.

Strategy comparison

Same debts, same budget — only the payoff order changes. The right choice balances math and motivation.

Strategy comparison
StrategyDebt-freeMonthsTotal interestInterest saved vs min.First winBest for
Minimum-onlySeptember 2035111$8,352.28$0Month 36Baseline
SnowballJanuary 203043$4,305.39$4,047Month 7Fastest first win
AvalancheSelectedJanuary 203043$4,305.39$4,047Month 7Targets highest APR
Highest paymentMarch 203045$5,974.95$2,377Month 23Best cash-flow relief
CustomJanuary 203043$4,381.75$3,971Month 19Your priority order
HybridJanuary 203043$4,305.39$4,047Month 7Quick win + interest saving

Balance over time

Your plan (starts at $28,940)Minimum-only baseline
Payoff milestones
Debt payoff milestones
DebtPaid off inDate
Store cardMonth 7January 2027
Visa cardMonth 22April 2028
Car loanMonth 29November 2028
Student loanMonth 43January 2030
Month-by-month totals (first 24 months)
Monthly totals
MonthDatePaidRemaining balanceCumulative interest
1July 2026$795.00$28,940.12$235.12
2August 2026$795.00$28,373.66$463.66
3September 2026$795.00$27,800.49$685.49
4October 2026$795.00$27,220.51$900.51
5November 2026$795.00$26,633.59$1,108.59
6December 2026$795.00$26,039.64$1,309.64
7January 2027$795.00$25,438.52$1,503.52
8February 2027$795.00$24,830.17$1,690.17
9March 2027$795.00$24,215.04$1,870.04
10April 2027$795.00$23,593.02$2,043.02
11May 2027$795.00$22,964.02$2,209.02
12June 2027$795.00$22,327.92$2,367.92
13July 2027$795.00$21,684.62$2,519.62
14August 2027$795.00$21,034.00$2,664.00
15September 2027$795.00$20,375.96$2,800.96
16October 2027$795.00$19,710.38$2,930.38
17November 2027$795.00$19,037.14$3,052.14
18December 2027$795.00$18,356.14$3,166.14
19January 2028$795.00$17,667.25$3,272.25
20February 2028$795.00$16,970.34$3,370.34
21March 2028$795.00$16,265.28$3,460.28
22April 2028$795.00$15,551.96$3,541.96
23May 2028$795.00$14,831.71$3,616.71
24June 2028$795.00$14,107.17$3,687.17

The Excel download includes per-debt schedules for avalanche, snowball, custom, the minimum-only baseline — and your selected strategy when it differs.

Download your payoff plan workbook

Exports your debt payoff summary, strategy comparison, month-by-month avalanche / snowball / custom schedules, minimum-only baseline, chart data, methodology, and disclaimer.

Generated in your browser from the numbers you entered — nothing is stored or sent to a server. Found an issue? Report it.

At a glance

Formula shown
Interest = Balance × APR ÷ 12; extra payments attack one target debt each month.
Scenario support
Five payoff orders plus a minimum-only baseline, with a debt-free-by-date solver.
Workbook export
10-sheet Excel (XLSX) export
Educational estimate
Planning support from the values you enter — not professional advice.

How to read your result

Your debt-free date and total interest are the headline, but the comparison table underneath is where the real decision lives: it shows the interest gap and the first-win gap between strategies on your actual balances and rates, not a generic rule of thumb. When the interest gap is small — common when APRs are similar across your debts — snowball's early wins cost almost nothing extra and can be worth choosing purely for motivation. When one debt carries a far higher rate, the avalanche savings get large and deserve more weight. Every savings figure is measured against the minimum-only baseline, which is shown honestly as "Never" when a minimum doesn't even cover a month's interest. Switch to "Debt-free by date" if you'd rather work backward from a target month to the payment it requires.

The payoff math

Monthly interest

Monthly Rate = APR ÷ 100 ÷ 12 · Interest = Balance × Monthly Rate

Accrued monthly in this model; many cards accrue daily in reality.

Each simulated month

Balance + Fee + Interest − Minimum − Targeted Extra = New Balance

Payments cap at the balance — it never goes negative.

Savings vs baseline

Saved = Minimum-Only Interest − Strategy Interest

Time saved works the same way, in months. Baseline can be “Never”.

Worked example

Three cards: 4,000 at 24% (min 120), 2,500 at 29% (min 80), 1,500 at 19% (min 50), with 200/month extra and fixed-total roll-down. Both orders finish in 23 months, but avalanche pays 1,933 of interest vs snowball's 2,104 — a 171 saving for zero extra effort. Minimum-only would take 59 months and 5,423 of interest: the extra 200 saves three years and ~3,490. This is the pattern worth remembering — avalanche's advantage widens as the APR spread between debts widens, and shrinks toward zero when all your debts carry similar rates.

Assumptions

  • Interest accrues monthly at APR ÷ 12 on the current balance; actual cards may accrue daily and differ slightly.
  • Minimum payments are the amounts you enter and stay constant; real lender minimums often recalculate monthly by formula.
  • Optional monthly fees are added to the balance before interest; promotional APRs apply through their end month, then revert.
  • No new purchases, charges, or borrowing are assumed. Payments are on time; late fees and penalty APRs are not auto-modeled.
  • The simulation caps at 600 months; anything longer reports as not amortizing rather than a fake date.

Limitations

  • Not a lender payoff quote — the official payoff amount on any date comes from your lender.
  • Lender rules, compounding, fees, taxes, minimum-payment formulas, and legal remedies vary by country.
  • No strategy is universally best for behaviour; the comparison shows costs so you can choose deliberately.
  • No consolidation, settlement, refinancing, or bankruptcy advice — those are separate decisions for qualified humans.

Adjacent tools: card-specific payoff math — issuer-style minimums that recalculate monthly, credit utilization, promo APRs, and balance transfers — lives in the credit card payoff calculator; fit the payment into your month with the budget calculator; compare borrowing costs with the APR calculator.

Frequently asked questions

What is a debt payoff calculator?

A tool that simulates paying off one or more debts month by month — interest accruing, minimums paid, extra money targeted by a strategy — and reports your debt-free date, total interest, and the savings of paying more than minimums.

What is the debt avalanche method?

Pay minimums on everything and send all extra money to the highest-APR debt first. With fixed APRs it is mathematically the cheapest order; a promotional rate that expires mid-plan can shift that, which is why this calculator compares the strategies on your actual numbers.

What is the debt snowball method?

Pay minimums on everything and send all extra money to the smallest balance first. It clears accounts fastest at the start, building momentum, usually at a modest extra interest cost the comparison table shows exactly.

What if my payment is less than the interest?

The balance grows every month and the debt never amortizes. The calculator flags this per debt and shows “Never (not amortizing)” rather than a fake date. Fixing it requires a higher payment, a lower rate, or lender intervention.

Should I consolidate my debts instead?

Sometimes useful, never universal: consolidation can lower rates and simplify payments, but fees, longer terms, and re-borrowing risk can erase the benefit. This page intentionally does not advise on it — treat it as a separate decision to model separately.

Related calculators

Tools around the same debt and budgeting math:

  • Credit Card Payoff CalculatorPlan up to 20 cards with issuer-style minimums, promo APRs, five payoff orders, and a balance-transfer scenario.
  • Budget CalculatorBuild a monthly and annual budget in simple or 65-line advanced mode, with savings rate, ratios, and a health score.
  • 50/30/20 Budget CalculatorSplit take-home pay into 50% needs, 30% wants, and 20% savings, compare your real spending, and test alternative ratios.
  • Net Worth CalculatorBuild a personal balance sheet — quick or 78-line detailed — with liquid and tangible net worth and debt analysis.
  • Savings CalculatorProject a savings balance or solve the deposit needed for a goal, with APR/APY, tax, and inflation.
  • Financial Needs Pyramid CalculatorScore five layers of your financial foundation — survival, safety, support, growth, and freedom — with a stress test and what-if simulator.

Read the guides

For the full comparison of snowball vs avalanche, with worked numbers, see Debt Snowball vs Debt Avalanche: How to Compare Payoff Methods.

To see how this debt load weighs against your income, see What Is a Good Debt-to-Income Ratio and How to Calculate It.

Debt & money disclaimer

This calculator is for educational estimates only. It is not financial, legal, tax, credit, or debt-settlement advice, and it is never an official lender payoff quote — contact your lender for the exact payoff amount. Lender rules, daily interest accrual, minimum-payment formulas, fees, and legal remedies vary by country. If debt feels unmanageable, a qualified nonprofit credit counselor or licensed professional can help.

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Learn more

Debt Snowball vs Debt Avalanche: How to Compare Payoff Methods

Debt snowball or avalanche? A worked two-card example showing months to payoff, total interest, and the real trade-off between the two methods.

Read the guide

Authorship & verification

Written and maintained by

  • Formula and examples verified on 14 June 2026
  • Educational estimate only

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