Is the debt snowball or avalanche better?

The avalanche is always cheaper, it pays the least total interest and clears everything first or at the same time, without exception. The snowball closes a whole account sooner, which some people need in order to keep going. Enter your debts above and the calculator will tell you exactly what the snowball costs, so you can decide whether the motivation is worth that price.

Why does the avalanche always win on interest?

Because interest is charged per dollar of balance at each debt’s own rate. Removing a dollar from the highest-rate debt stops the most expensive interest, so aiming every spare dollar there is optimal at every step. There is no set of balances or rates where a different order pays less, which is why this is a proof rather than a rule of thumb.

What is the rollover, and why does it matter so much?

When a debt clears, its minimum payment does not go back into your pocket, it joins the amount attacking the next debt. So the money aimed at each successive target grows, and the last debt falls far faster than the first did. Both methods rely on it, and skipping it is the single most common way people stall.

Should I use a balance transfer or consolidation loan instead?

They solve a different part of the problem: this calculator changes the order you pay, while those change the rate you pay. They combine well. Check whether a balance transfer beats its fee or whether a consolidation loan is worth it, then run whatever is left through this.

What if I can only afford the minimums?

Then neither method applies yet, because both depend on having something spare to aim. Set the extra to zero here to see how long the minimums alone take, on credit cards it is usually decades. The credit card payoff calculator shows why: a card minimum shrinks as the balance does.

Should I stop investing while I pay this off?

Not entirely. Get any employer retirement match first, a 50% match beats any consumer debt rate, and keep some cash buffer, since running without one is what puts the balances back. Beyond that, high-rate debt is usually the better return.

Debt Snowball or Avalanche: Which Clears Debt Faster?

Debt snowball or avalanche: which clears debt faster? The avalanche always costs less interest, because paying the highest rate first removes the most expensive dollar first. The snowball clears a whole account sooner. This puts a figure on both sides of that trade.

Example numbers

The verdictfrom an example

On these debts the two methods are identical, the smallest balance also carries the highest rate, so both attack it first.

Worked on Three debts at 27.9%, 18.9% and 6.9%, with $300 a month spare. Change anything below to use yours.

Avalanche saves: Nothing
Snowball clears its first debt: At the same time
Avalanche: debt free in: 2 years, 4 months

The figures behind it

Avalanche saves: Nothing; The two orders happen to coincide on your debts, so it makes no difference.
Snowball clears its first debt: At the same time; The whole argument for the snowball is that an account disappears earlier.
Avalanche: debt free in: 2 years, 4 months; Paying $3,000 of interest, highest rate first.
Snowball: debt free in: 2 years, 4 months; Paying $3,000 of interest, smallest balance first.
You pay each month: $840; Every minimum plus your extra. Identical on both plans, which is what makes them comparable.
Order to attack them: 1 → 2 → 3; By avalanche. The snowball order is smallest balance first.

What you owe on both plans

Years from today

Avalanche, highest rate firstSnowball, smallest balance first

Payment scheduleShow

The table scrolls sideways

Month	Avalanche · owed	Avalanche · interest	Snowball · owed	Snowball · interest
1	$19,888	$228	$19,888	$228
2	$19,266	$446	$19,266	$446
3	$18,635	$655	$18,635	$655
4	$17,994	$854	$17,994	$854
5	$17,343	$1,043	$17,343	$1,043
6	$16,682	$1,222	$16,682	$1,222
7	$16,010	$1,390	$16,010	$1,390
8	$15,331	$1,551	$15,331	$1,551
9	$14,643	$1,703	$14,643	$1,703
10	$13,948	$1,848	$13,948	$1,848
11	$13,244	$1,984	$13,244	$1,984
12	$12,531	$2,111	$12,531	$2,111
13	$11,810	$2,230	$11,810	$2,230
14	$11,081	$2,341	$11,081	$2,341
15	$10,343	$2,443	$10,343	$2,443
16	$9,596	$2,536	$9,596	$2,536
17	$8,840	$2,620	$8,840	$2,620
18	$8,075	$2,695	$8,075	$2,695
19	$7,301	$2,761	$7,301	$2,761
20	$6,517	$2,817	$6,517	$2,817
21	$5,724	$2,864	$5,724	$2,864
22	$4,921	$2,901	$4,921	$2,901
23	$4,109	$2,929	$4,109	$2,929
24	$3,293	$2,953	$3,293	$2,953
25	$2,472	$2,972	$2,472	$2,972
26	$1,646	$2,986	$1,646	$2,986
27	$816	$2,996	$816	$2,996
28	$0	$3,000	$0	$3,000

What this result assumes

Both plans pay exactly the same amount every month, every minimum, plus your extra, so the only difference between them is the order the extra is applied in.
When a debt clears, its minimum is added to the amount attacking the next one. That rollover is what both methods are named for, and it is why the last debt falls so much faster than the first.
The order is fixed at the start rather than recalculated each month, which is how both methods are actually described and followed.
Minimum payments are held constant. A credit card minimum falls as the balance does, which would slow both plans slightly and the snowball marginally more.
Promotional rates, fees and any new spending are not modelled.

Methodology

Reviewed September 1, 2026

The same machine, two sort orders

Both methods work identically. You pay the minimum on every debt, throw every spare dollar at one target until it clears, then add that debt’s freed minimum to the spare amount and move to the next. The pile aimed at the target grows each time one falls, which is where the snowball image comes from — and the avalanche does exactly the same thing.

The only difference is which debt you target first. The avalanche takes the highest interest rate; the snowball takes the smallest balance. Everything else about the two plans is the same, including how much you pay each month.

That equality is what makes the comparison honest. Both plans here collect every minimum plus your extra, every month, so neither can win by quietly spending more. The order the extra is applied in is the entire difference between them.

The avalanche is provably cheaper

This is not a close empirical question. Paying the highest rate first always removes the most expensive dollar of debt first, so the avalanche always pays the least total interest and always finishes first or ties. The test suite asserts this across a range of extra payments rather than taking it on trust.

What varies is the size of the gap. When your smallest balance also carries your highest rate the two orders coincide and the difference is zero. When they conflict — a tiny cheap loan against a large expensive card — the gap can run to four figures.

So the honest framing is not "which is better" but "what does the snowball cost, and is the thing it buys worth that". The calculator gives you both halves of that.

What the snowball buys

An account that disappears. That is not a mathematical benefit and this model cannot price it, but it is not nothing either: the research that made the snowball popular found people were more likely to stick with a payoff plan when they saw whole balances close early, and a plan you abandon returns nothing at all.

The figure to weigh it against is the extra interest, shown above. If the snowball costs you fifty dollars, take the motivation. If it costs two thousand, that is a large sum to pay for a feeling, and it is worth asking whether a middle order — clearing one small balance for momentum, then switching to rate order — gets you both.

That hybrid is not modelled here, but you can approximate it by running the calculator twice: once as a snowball to see the first payoff date, once as an avalanche for the rest.

Assumptions

Both plans pay every minimum plus your extra, every month, until all debts clear.
The attack order is fixed at the start rather than recalculated as balances change.
Minimum payments are constant. A real credit card minimum falls as the balance does.
Interest is charged monthly on each balance at a fixed rate.
No new spending, cash advances or balance transfers are added to any debt.
Fees, late charges and penalty APRs are excluded.
Promotional and teaser rates are not modelled; enter the rate that will actually apply.
Any behavioural benefit of clearing an account early is real but not priced.

Sources

Common questions

Is the debt snowball or avalanche better?: The avalanche is always cheaper, it pays the least total interest and clears everything first or at the same time, without exception. The snowball closes a whole account sooner, which some people need in order to keep going. Enter your debts above and the calculator will tell you exactly what the snowball costs, so you can decide whether the motivation is worth that price.
Why does the avalanche always win on interest?: Because interest is charged per dollar of balance at each debt’s own rate. Removing a dollar from the highest-rate debt stops the most expensive interest, so aiming every spare dollar there is optimal at every step. There is no set of balances or rates where a different order pays less, which is why this is a proof rather than a rule of thumb.
What is the rollover, and why does it matter so much?: When a debt clears, its minimum payment does not go back into your pocket, it joins the amount attacking the next debt. So the money aimed at each successive target grows, and the last debt falls far faster than the first did. Both methods rely on it, and skipping it is the single most common way people stall.
Should I use a balance transfer or consolidation loan instead?: They solve a different part of the problem: this calculator changes the order you pay, while those change the rate you pay. They combine well. Check whether a balance transfer beats its fee or whether a consolidation loan is worth it, then run whatever is left through this.
What if I can only afford the minimums?: Then neither method applies yet, because both depend on having something spare to aim. Set the extra to zero here to see how long the minimums alone take, on credit cards it is usually decades. The credit card payoff calculator shows why: a card minimum shrinks as the balance does.
Should I stop investing while I pay this off?: Not entirely. Get any employer retirement match first, a 50% match beats any consumer debt rate, and keep some cash buffer, since running without one is what puts the balances back. Beyond that, high-rate debt is usually the better return.

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