Which is better, snowball or avalanche?

Avalanche always pays the least interest because it kills your most expensive debt first. Snowball clears a whole debt sooner, which many people find more motivating. In our worked examples the gap ranged from $0 to about $792. If the gap is small, pick the plan you will actually finish.

How much can the avalanche method actually save?

It depends entirely on the spread between your interest rates and how your balances are ordered. In a two-debt example with a $4,500 car loan at 5.9% and an $11,000 credit card at 25.99% paying $700 a month, avalanche saved $792 in interest and finished one month sooner. When your smallest balance already has your highest APR, the two methods are identical and the saving is exactly $0.

Does this calculator use daily or monthly compounding?

It compounds monthly, using APR divided by 12. Most US credit card issuers compound daily using APR divided by 365. Daily compounding produces roughly 1% to 2% more interest than our estimate over a typical payoff, and the payoff month is almost always identical. We publish this so you can judge the estimate for yourself.

Should I include my mortgage in the calculator?

Usually no. A mortgage has a low rate, a long term, and possible tax treatment, so including it distorts the comparison of consumer debts. Most people run consumer debt — credit cards, car loans, personal loans, student loans, medical bills — through the calculator and handle the mortgage separately.

What if my budget is less than my minimum payments?

The calculator will tell you, because no payoff plan can work in that situation. That is a signal to contact your creditors about hardship programs, or to talk to a nonprofit credit counselor accredited by the NFCC before missing payments.

Does the calculator handle 0% promotional APR?

Only partly. You can enter 0% as the APR, but the calculator holds that rate for the entire payoff — it does not model the promotional period ending. If your 0% offer expires in 18 months, run the calculator twice: once at 0% to see if you can clear it in time, and once at the go-to rate to see what happens if you cannot.

Should I pay off debt or build an emergency fund first?

A common approach is a small starter emergency fund of around $1,000 first, then aggressive debt payoff, then a full 3 to 6 month fund. Without any buffer, the next unexpected expense usually goes back on the card you just paid down.

Will using this calculator affect my credit score?

No. It is a calculator, not a credit application. Nothing is submitted anywhere, there is no credit check, and no data leaves your browser. Paying debt down generally helps your score over time by lowering credit utilization.

Yes. The calculator runs entirely in your browser as client-side JavaScript. Your balances are never uploaded to any server. Figures you enter are saved only in your own browser's local storage so the page remembers them on your next visit, and you can clear them any time.

Is this debt payoff calculator free?

Yes. It is completely free, requires no signup, and has no usage limit.

Should I consolidate my debts instead?

Consolidation only helps if the new rate is genuinely lower after fees and you do not re-use the cards you paid off. Run your current debts through the calculator, then run a single consolidated debt at the offered rate and term, and compare total interest. Be cautious with for-profit debt settlement companies; the FTC publishes guidance on how they work.

How often should I redo the calculation?

Every few months, and any time your income, minimum payments, or interest rates change. Variable-rate cards can reprice, and a raise or a new side income usually shortens your debt-free date more than any change of strategy.

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Debt Payoff Calculator

Q: What is the debt snowball method?

The debt snowball method pays minimums on every debt, then puts all extra money toward the debt with the smallest balance first. When it is gone, that payment rolls to the next-smallest. It clears individual debts quickly for motivation, though it may cost slightly more interest than avalanche.

Q: What is the debt avalanche method?

The debt avalanche method pays minimums on every debt, then puts all extra money toward the debt with the highest interest rate (APR) first. It mathematically minimizes total interest paid and usually clears all debt fastest.

Q: When do snowball and avalanche give the same answer?

Whenever ordering your debts by balance produces the same sequence as ordering them by APR. This is common, because small balances such as store cards often carry the highest rates. In that case both methods pay identical interest and finish on the same date, so you can simply pick either one.

Q: What happens if I only pay the minimum?

Interest keeps compounding on almost the whole balance. On a $6,000 card at 24.99% APR with a $150 minimum, paying only the minimum takes 87 months — 7 years 3 months — and costs $7,025 in interest, more than doubling what you borrowed. Raising the payment to $300 cuts it to 27 months and $1,841 in interest.

Enter your debts and how much you can pay each month. See your exact debt-free date, the total interest you’ll pay, and whether the snowball or avalanche method saves you more. Free, no signup — your numbers stay in your browser.

Built and maintained by BudgetBee · Updated 2 August 2026 · Formula published below · Runs in your browser — nothing is uploaded

Total you can pay each month ($)

The short answer

Avalanche always pays less interest. It is a mathematical result, not an opinion: sending your spare money to the highest interest rate first removes the most expensive dollars from your balance sheet soonest.

Snowball clears a whole debt sooner, which is worth real money if it is the difference between finishing your plan and abandoning it in month five.

The gap between them is usually smaller than people expect. In the worked examples further down this page — all computed with the calculator above — avalanche saved $792, $671, $356, and in one very ordinary case exactly $0. Run your own numbers before you agonise over the choice; for many people there is nothing to agonise about.

How the two methods differ

Both methods start identically. You pay the required minimum on every single debt so nothing goes delinquent. The only question is where your extra money goes.

	Debt avalanche	Debt snowball
Extra money goes to	Highest APR	Smallest balance
Optimises for	Money	Motivation
Total interest	Always lowest	Equal or higher
First debt cleared	Can take a while	Usually fast
Best if	Numbers motivate you	Progress motivates you
Also called	Debt stacking	Ramsey method

Both methods use the same rollover engine, and that is the part that does the heavy lifting. When a debt hits zero, its payment does not go back into your spending money — it stacks onto the next target. Your payment against a single debt therefore grows every time you clear one, which is why payoff accelerates sharply toward the end of any plan.

Example 1: the classic case

This is the situation the snowball-versus-avalanche argument was invented for — a small, cheap debt sitting next to a large, expensive one.

Budget: $700 per month (minimums total $465, so $235 is spare).
Debt	Balance	APR	Minimum
Car loan	$4,500	5.90%	$190
Credit card	$11,000	25.99%	$275

Avalanche saves **$791.58** and finishes one month sooner.
Method	Debt-free in	Total interest	Order cleared
Snowball	30 months	$5,045.96	Car loan (month 11), card (month 30)
Avalanche	29 months	$4,254.38	Car loan (month 26), card (month 29)

Snowball kills the car loan in month 11 and it feels excellent. But for those eleven months the 25.99% card is only receiving its minimum, so it keeps growing at roughly $238 of interest per month. That is what the $792 buys you: eleven months of psychological wins.

Whether that is a good trade is genuinely personal. $792 over two and a half years is about $26 a month. If clearing the car loan early is what stops you quitting, snowball is the better plan for you — a finished snowball beats an abandoned avalanche by an infinite margin.

Example 2: three debts

Add a mid-sized personal loan and the ordering diverges more.

Budget: $850 per month (minimums total $525).
Debt	Balance	APR	Minimum
Student loan	$22,000	6.80%	$240
Credit card	$7,500	27.90%	$190
Personal loan	$3,000	11.50%	$95

Avalanche saves **$670.78** and finishes one month sooner.
Method	Debt-free in	Total interest	Order cleared
Snowball	47 months	$6,780.22	Personal (8), card (22), student (47)
Avalanche	46 months	$6,109.44	Card (18), personal (21), student (46)

Notice how close the two payoff dates are — 46 versus 47 months. This is typical. The strategy mostly changes which debt disappears first and how much interest you hand over on the way; it rarely changes your finish line by more than a month or two. What changes your finish line dramatically is the size of your monthly payment.

When both methods give exactly the same answer

Here is something most comparison articles never mention. Consider an extremely common debt profile:

Budget: $900 per month.
Debt	Balance	APR	Minimum
Credit card	$6,000	24.99%	$150
Car loan	$12,000	7.50%	$320
Student loan	$18,000	5.50%	$190

Both methods return 47 months and $5,514.15 of interest. Identical to the cent.

Why the tie happens

Sorting these debts smallest-balance-first gives card → car → student. Sorting them highest-APR-first gives card → car → student. Same sequence. When your smallest debt already carries your highest rate, the two strategies are the same strategy wearing different names.

This is not a rare edge case. Small balances often are the expensive ones — store cards and retail financing typically carry higher APRs than car or student loans. Before agonising over strategy, check whether the choice even exists for you.

The minimum-payment trap

Strategy is the small lever. Payment size is the big one. Here is a single $6,000 credit card at 24.99% APR with a $150 minimum, and nothing else changing except how much is paid each month:

Monthly payment	Time to clear	Total interest	Total paid
$150 (minimum)	87 months — 7 yr 3 mo	$7,025.42	$13,025.42
$200	48 months — 4 yr	$3,511.52	$9,511.52
$300	27 months — 2 yr 3 mo	$1,841.44	$7,841.44
$500	14 months — 1 yr 2 mo	$975.81	$6,975.81

Read that first row again

Paying the minimum on a $6,000 balance costs $7,025 in interest — you repay more than double what you borrowed, and it takes over seven years. Finding just $150 more per month takes it to 27 months and $1,841, saving $5,184 and five years.

No choice of snowball or avalanche comes close to that. If you only change one thing after using this calculator, change the payment amount, not the strategy.

How this calculator does the math

Most calculators ask you to trust a black box. Here is the entire engine, so you can check it against your own statement:

monthly_rate = APR ÷ 100 ÷ 12 Each month, for every debt with a balance remaining: interest = balance × monthly_rate balance = balance + interest Then, from your monthly budget: 1. pay the required minimum on every active debt 2. send everything left over to ONE target debt: avalanche → highest APR snowball → smallest balance 3. if the target clears mid-month, the remainder cascades to the next target in the same order Repeat until every balance reaches zero.

The rollover in step 3 is what makes the plan accelerate: a cleared debt's minimum is never released back into your budget, it is absorbed by the next target.

The calculator also refuses to give you a false answer. If your budget is below the sum of your minimums it says so rather than producing a fantasy payoff date, and if interest is outgrowing your payments it tells you the debt never clears instead of silently running forever.

What the calculator assumes

Every projection makes assumptions. Ours, stated plainly:

Assumption	Reality	Effect on your estimate
Compounds monthly (APR ÷ 12)	Most US card issuers compound daily (APR ÷ 365)	We estimate roughly 1–2% less interest; payoff month almost always identical
APR stays fixed	Variable rates move; promo rates expire; missed payments can trigger penalty APR	Understates cost if your rate rises
Minimum payment stays fixed	Card minimums are often a % of balance, so they shrink as you pay down	Minor — your extra payment absorbs the difference
No new charges	People keep using the card	Understates payoff time, often badly
No fees	Annual, late and over-limit fees exist	Understates total cost

On the compounding point specifically: for a $6,000 balance at 24.99% paid at $300 a month, our monthly method gives $1,841.44 of interest and true daily compounding gives about $1,868 — a difference of roughly $27 across 27 months, with the payoff month unchanged. Across the range of rates and balances we tested, the gap stayed between 1% and 2%. It is a planning estimate, and an honest one, but your statement is always the authority.

The largest error in any payoff projection is almost never the compounding method. It is new spending on a card you are trying to clear.

Recommended tool

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Compare balance-transfer cards →

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How to actually finish the plan

The calculator gives you a date. Reaching it is a separate problem, and it is mostly behavioural rather than mathematical.

Automate the minimums. A single missed payment can trigger a penalty APR and a late fee, which costs more than any strategy choice saves.
Keep a small buffer first. Around $1,000 set aside stops the next flat tyre landing back on the card you just paid down. Our emergency fund calculator sizes a full one for later.
Stop adding to the target debt. Paying down a card you are still spending on is the single most common reason a plan stalls.
Send windfalls straight to the target. Tax refunds, bonuses and side income shorten the plan far more than switching strategy.
Recalculate every few months. Balances, rates and income all move.
Ask for a lower rate. A phone call to your issuer costs nothing. A few points off a large balance can outperform your entire strategy decision.

If the numbers do not work at all

If your budget cannot cover your minimum payments, no payoff strategy will fix that and you should not wait until you have missed payments. Nonprofit credit counselling agencies accredited by the NFCC offer free or low-cost sessions, and the CFPB publishes guidance on your options. Be cautious with for-profit debt-settlement firms — the FTC explains how their fees and credit consequences work.

Glossary

APR (Annual Percentage Rate): The yearly cost of borrowing. For credit cards it is essentially the interest rate; for loans it also folds in certain fees. This is the number the avalanche method sorts by.
Minimum payment: The smallest amount you can pay without the account going delinquent. On credit cards it is typically a small percentage of the balance with a dollar floor, so it falls as your balance falls.
Principal: The amount you actually borrowed, as opposed to the interest charged on it. Only payments above the accruing interest reduce principal.
Amortization: The month-by-month schedule of how a balance falls as payments are applied and interest accrues. The calculator above runs a full amortization for every debt.
Rollover: Taking the payment from a debt you just cleared and adding it to the next target instead of back into your spending. This is what makes both snowball and avalanche accelerate.
Debt avalanche: Extra payments go to the highest APR first. Mathematically minimises total interest. Also called debt stacking.
Debt snowball: Extra payments go to the smallest balance first. Clears individual accounts fastest, popularised as a motivation-first method.
Credit utilization: Your card balances as a percentage of your credit limits. A major scoring factor, which is why paying cards down usually helps your credit score.
Penalty APR: A substantially higher rate an issuer may apply after a missed payment. Avoiding it is worth more than most strategy decisions.
Balance transfer: Moving a balance to a card with a low or 0% introductory rate, usually for a fee. Helps only if you clear the balance before the promotional period ends.

Frequently asked questions

What is the debt snowball method?

Pay minimums on everything, then throw all extra cash at your smallest balance. When it’s gone, roll that payment into the next-smallest. Fast, motivating wins.

What is the debt avalanche method?

Pay minimums on everything, then throw all extra cash at your highest-APR debt. This minimises the total interest you pay and usually clears everything soonest.

Which is better?

Avalanche always pays less interest; snowball clears a whole debt sooner. In our examples the gap ranged from $0 to $792. If the gap is small for your numbers, pick the one you will actually finish.

How much can avalanche actually save?

It depends on the spread between your rates and the order of your balances. Example 1 on this page saves $792; the tie example saves exactly $0. Run your own numbers — the answer varies enormously.

When do snowball and avalanche give the same answer?

Whenever sorting by balance produces the same order as sorting by APR. This is common, because small balances such as store cards often carry the highest rates. See the worked tie above.

What happens if I only pay the minimum?

On a $6,000 card at 24.99% with a $150 minimum: 87 months and $7,025 in interest — more than double what you borrowed. See the table above.

Does this use daily or monthly compounding?

Monthly (APR ÷ 12). Most US card issuers compound daily (APR ÷ 365), which produces about 1–2% more interest than our estimate, with the payoff month almost always unchanged. Full detail in assumptions.

Should I include my mortgage?

Usually no. Its low rate and long term distort the comparison. Run consumer debts here and handle the mortgage separately.

What if my budget is below my minimums?

The calculator will tell you rather than invent a date. That situation needs a conversation with your creditors or an NFCC-accredited nonprofit counsellor, ideally before you miss a payment.

Does it handle 0% promotional APR?

Partly — you can enter 0%, but it holds that rate for the whole payoff and does not model the promo ending. Run it twice: once at 0%, once at the go-to rate.

Debt payoff or emergency fund first?

A common approach is a small starter fund (around $1,000), then aggressive payoff, then a full 3–6 month fund. Without any buffer the next surprise expense usually lands back on the card.

Will this affect my credit score?

No — it is a calculator, not an application. There is no credit check and nothing is submitted. Paying balances down generally helps your score by lowering utilization.

Is my data private?

Yes. Everything runs as client-side JavaScript in your browser. Your balances are never uploaded. Entries are kept only in your own browser’s local storage so the page remembers them next visit.

Is this calculator free?

Completely free, no signup, no usage limit.

Should I consolidate instead?

Only if the new rate is genuinely lower after fees and you don’t re-use the cleared cards. Model your current debts here, then model one consolidated debt, and compare total interest.

How often should I redo this?

Every few months, and whenever income, minimums or rates change. A raise or new side income shortens your date more than any strategy switch.

Sources and further reading

Consumer Financial Protection Bureau (CFPB) — credit card terms, minimum payments, debt collection rights, and its regular report on the consumer credit card market.
Federal Reserve, G.19 Consumer Credit release — the official US series for outstanding revolving credit and average credit card interest rates.
Federal Trade Commission — Consumer Advice — guidance on debt relief and settlement companies, and how their fees and credit consequences work.
National Foundation for Credit Counseling (NFCC) — directory of accredited nonprofit credit counselling agencies.
Calculation logic for this page is the open JavaScript source that powers the calculator above; the formula is reproduced in full under how this calculator does the math.

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BudgetBee provides free educational tools, not financial advice. Calculations are estimates based on the numbers you enter and the assumptions listed above, and assume fixed rates and payments with no new charges or fees. Your statement and your lender are always the authority on what you owe. Verify important decisions with a qualified professional.