Loans
Debt Payoff Calculator — Snowball vs Avalanche
There are two proven ways out of debt: the snowball (smallest balance first, for momentum) and the avalanche (highest rate first, for math). Enter up to three debts and one extra monthly amount to see both plans side by side — payoff order, debt-free date, and exactly what choosing motivation over math costs.
Tested against worked examplesHow we verify
Set a balance to 0 to ignore that debt.
On top of all minimums — this is what powers the strategy.
Debt-free in (both strategies): 2 years 4 months
Debt-free in (both strategies)
2 years 4 months
- Total debt
- $17,500
- Interest — Avalanche (highest APR first)
- $2,329
- Interest — Snowball (smallest balance first)
- $2,526
- Extra cost of choosing snowball
- $198
The avalanche's math advantage on your debts.
Payoff order
| Strategy | 1st payoff (month) | 2nd payoff (month) | Debt-free (month) |
|---|---|---|---|
| Avalanche | 12 | 15 | 28 |
| Snowball | 6 | 16 | 28 |
Compare scenariosTry three values of one input
| Extra monthly budget | |||
|---|---|---|---|
| Debt-free in (both strategies) | 2 years 5 months | 2 years 4 months−1 month | 2 years 3 months−2 months |
| Interest — Avalanche (highest APR first) | $2,438 | $2,329−$109 | $2,230−$208 |
| Interest — Snowball (smallest balance first) | $2,646 | $2,526−$119 | $2,418−$228 |
| Extra cost of choosing snowball | $208 | $198−$11 | $188−$20 |
Every other input stays at the value you set above — currently $300 for extra monthly budget. Differences are measured against the first column.
Saved scenariosSave this calculation
Saved in this browser only — no account, and nothing is sent to us. Clearing your browser data deletes them.
How this calculator works
Both strategies are simulated month by month in exact cents: interest accrues on each balance at APR ÷ 12, every debt receives its minimum, and the entire remaining budget attacks the target debt with rollover as debts are eliminated. Total budget stays constant throughout — the standard method.
The comparison is apples-to-apples: identical budget, identical rounding. Assumes fixed APRs and no new borrowing.
What this assumes
- Minimum payments stay fixed at the amount you enter. Real card minimums are a percentage of the balance and fall as it drops, which stretches payoff dramatically.
- Rates do not change and no new debt is added during the plan.
- Every minimum is paid on time. A missed payment can trigger a penalty rate that dwarfs any ordering advantage.
What changes this number
- The extra payment
- Worth roughly three times the choice of method. On $22,500 of debt, going from $200 to $400 a month saves about $1,372 and seven months.
- Interest rate spread
- The wider the gap between your highest and lowest rate, the more the avalanche order actually saves. When the spread is narrow, the methods nearly tie.
- Payoff order
- Real but small: a few hundred dollars on typical balances. Choose the one you will finish and stop optimising it.
A worked example
Take the classic mix: card + car + medical scenario. These figures are produced by the calculator above, not written alongside it, so they always match what the tool returns.
What you enter
- Debt 1 — balance
- $4,500
- Debt 1 — APR
- 24%
- Debt 1 — minimum payment
- $135
- Debt 2 — balance
- $11,000
What it returns
- Debt-free in (both strategies)
- 2 years 4 months
- Total debt
- $17,500
- Interest — Avalanche (highest APR first)
- $2,329
- Interest — Snowball (smallest balance first)
- $2,526
- Extra cost of choosing snowball
- $198
Try an example
Frequently asked questions
Snowball or avalanche — which is better?
Mathematically, the avalanche (highest APR first) always costs the same or less interest. Behaviorally, the snowball's quick first wins keep more people going — research on debt repayment consistently finds completion matters more than optimization. Run both above: when the difference is small, pick momentum.
How do the strategies actually work?
Both pay every minimum every month. All extra money attacks one target debt: the smallest balance (snowball) or the highest rate (avalanche). When a debt dies, its entire payment rolls into the next target — the 'snowball effect' that accelerates the endgame in both plans.
Should I consolidate instead?
A consolidation loan or 0% balance transfer can lower your average rate and simplify to one payment — effectively an avalanche with better numbers. It works when the new APR (including fees) beats your weighted average and you don't re-run the balances back up.
What if I can't pay more than the minimums?
The strategies need fuel — even $50 extra changes the math. If minimums alone don't cover interest, this calculator flags it: that's the signal to trim expenses, raise income, or talk to a nonprofit credit counselor (NFCC-affiliated) about a debt-management plan before balances spiral.
How much does choosing snowball over avalanche actually cost?
On our default mix of $17,500 of debt, both methods clear it in 2 years 4 months. Avalanche costs $2,329 in interest and snowball $2,526 — a difference of $198. Raising the extra payment changes the outcome far more than the order does.
This calculator helps answer
How do I get out of debt?
Order your debts, find the extra payment that actually moves the date, and price the shortcuts. The method matters far less than most advice suggests.
Should I pay off debt or invest?
Compare a guaranteed return you cannot lose against an expected one you might. The answer is clear at both extremes and genuinely close in the middle.
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Disclaimer: DayCents provides this calculator for educational purposes only. Results are estimates based on your inputs and the stated assumptions — they are not financial advice, a quote, or an offer of credit. Consult a qualified financial professional before making major money decisions.