Debt Snowball vs Avalanche Payoff Calculator (Timeline and Interest Saved)
Both payoff strategies pay the minimum on everything and throw every spare dollar at one target debt. They differ only in which target you choose: avalanche picks the highest interest rate, snowball picks the smallest balance. Avalanche always wins on arithmetic; snowball frequently wins in practice because a closed account in month two keeps people in the plan.
The two methods are within a rounding error here — pick snowball for the motivation.
| Method | Order of attack | Months to debt-free | Total interest | Psychological pull |
|---|---|---|---|---|
| Avalanche | Highest APR first | 26 | $2,614 | Slower first win |
| Snowball | Smallest balance first | 27 | $2,713 | Fast first win |
When the gap is worth caring about
If your balances carry similar rates, the two methods finish within a month or two of each other and the interest difference is trivial — take the motivational route. The gap widens sharply when one large balance carries a much higher APR than a small one, which is the classic credit-card-plus-car-loan situation.
Minimum payments are a trap
Card minimums are typically 2% of the balance or a fixed floor. Because that percentage shrinks as the balance falls, paying only minimums on a 24.9% APR card can take over 20 years and cost more in interest than the original purchase. Any fixed extra amount above the minimum dramatically shortens the tail.
Consider a balance transfer first
Before optimising the order, check whether a 0% balance transfer or a fixed-rate consolidation loan is available. Moving a 24.9% balance to 0% for 18 months usually beats any reordering strategy — just budget for the 3-4% transfer fee and have a plan for the revert rate.
Cost of minimum payments only (2% minimum)
| Balance | APR | Years to clear | Total interest | With +$100/month |
|---|---|---|---|---|
| $2,000 | 19.9% | 16 yrs | $2,780 | 1 yr 7 mo |
| $5,000 | 22.9% | 24 yrs | $9,450 | 3 yr 6 mo |
| $10,000 | 24.9% | 31 yrs | $22,600 | 6 yr 4 mo |
| $15,000 | 18.9% | 28 yrs | $22,100 | 7 yr 9 mo |
People also ask
Is the debt snowball or avalanche method better?
Avalanche always costs less interest because it attacks the highest rate first. Snowball clears individual accounts faster, which studies of real repayment behaviour show improves the odds of finishing the plan.
Which debt should I pay off first?
Mathematically, the one with the highest APR. Behaviourally, the smallest balance. If the interest difference between the two approaches is under a couple of hundred, take the smallest balance.
Do extra payments go to principal?
On most revolving credit and instalment loans, anything above the minimum reduces principal — but confirm with the lender, as some apply extra payments to future instalments instead.
Three worked examples
Same engine, three different starting points — useful if you want to see how sensitive the answer is before you type your own numbers in.
Example 1: debt 1 balance 3276, currency "USD $"
On the lower / more conservative end. The two methods are within a rounding error here — pick snowball for the motivation.
Example 2: debt 1 balance 4200, currency "USD $"
A typical middle-of-the-road setup. The two methods are within a rounding error here — pick snowball for the motivation.
Example 3: debt 1 balance 5460, currency "GBP £"
On the higher / more demanding end. The two methods are within a rounding error here — pick snowball for the motivation.
Quick answers about the Debt Snowball vs Avalanche
What exactly does the Debt Snowball vs Avalanche work out?
Both payoff strategies pay the minimum on everything and throw every spare dollar at one target debt. You enter currency, debt 1 balance, debt 1 APR and debt 2 balance (plus 4 more optional details) and the result panel updates straight away, so you can compare two or three versions of the same question in a few seconds.
What do I need before I start?
Only 8 fields: currency, debt 1 balance, debt 1 APR, debt 2 balance, debt 2 APR, debt 3 balance, debt 3 APR and total monthly payment. Nothing else is needed and nothing is stored.
How is it calculated — when the gap is worth caring about?
If your balances carry similar rates, the two methods finish within a month or two of each other and the interest difference is trivial — take the motivational route. The same maths runs inside this page, so hand-checking the result on paper gives you the identical figure.
Why do two calculators give me different answers for debt Snowball vs Avalanche?
Card minimums are typically 2% of the balance or a fixed floor. Different sites pick different assumptions, so always check which method a calculator states before you trust the gap between two numbers.
What does the "Cost of minimum payments only (2% minimum)" table on this page tell me?
It is the reference range this tool works against — 4 rows from "$2,000" (19.9%) up to "$15,000" (18.9%). Use it to sanity-check whether the number you just calculated sits where you expected it to.
Which currency should I pick?
The dropdown offers 5 choices — USD $, GBP £, EUR €, CAD C$ and AUD A$. Pick the one that matches your real situation rather than the one you would like to be true; currency usually moves the final figure more than any other single input, so it is worth running it twice with the option above and below your guess.
Does it work in both metric and imperial (or another currency)?
Yes. The "Currency" control converts every field and every result, so you never have to convert anything by hand before typing it in. Switch it after entering your numbers and the output re-renders instantly in the new system.
Do I have to press a button or reload the page to see the result?
No. Debt Snowball vs Avalanche runs completely inside your browser, so the moment you change a value the cards recalculate — there is no submit step, no page reload and no waiting for a server round trip. That also means it keeps working on a weak or intermittent mobile connection.
Is it free, and do you keep what I type?
It is free with no sign-up, no app install and no usage limit. Nothing you enter into Debt Snowball vs Avalanche leaves your device — the calculation is JavaScript running locally, so there is no upload of your figures to DrHint or anyone else.
Can I use it on a phone?
Yes — the layout stacks to a single column on small screens and the number fields open the numeric keypad on both Android and iOS. Many people bookmark this page or add it to their home screen and re-open it whenever the question comes up.
Anything to be careful about with the result?
Avalanche always costs less interest because it attacks the highest rate first. Treat the output as a well-grounded estimate for planning, not as a professional, legal or medical decision on its own.
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