Debt snowball vs avalanche: which is better, and which is faster?

Debt snowball vs avalanche: which is better?

The debt avalanche is cheaper and usually faster: you pay the highest interest rate first, so less of your money goes on interest. The debt snowball costs more but gives you a paid-off account sooner, because you clear the smallest balance first. In the worked example below, the avalanche saves $549.07 and finishes 1 month earlier on $15,500 of debt.

Both methods use the same monthly budget and the same rule for every other debt: pay at least the minimum on all of them. They differ only in which debt gets the money left over after the minimums. According to the Consumer Financial Protection Bureau (CFPB), paying the highest rate first eliminates the costliest debts first and can save money, while the snowball shows progress sooner but may cost more. The Financial Consumer Agency of Canada gives the same advice.

Pick the avalanche if you will stick with a plan that takes months to show a cleared account. Pick the snowball if you have quit plans before, or if the gap in cost for your debts is small. Put your own balances, rates and minimums into the debt payoff planner to see both results side by side before you choose.

The method works the same in pounds, dollars or Canadian dollars. The examples use $, and every figure reads the same in £.

How the debt avalanche works, step by step

The debt avalanche orders your debts by interest rate, highest first, and sends every spare dollar to the top one.

1. List every debt with its balance, its APR (the yearly interest rate) and its minimum monthly payment. Use your latest statements.
2. Set one monthly budget for all your debts. It must be at least the minimums added up.
3. Sort the list by APR, highest first. If two rates match, put the smaller balance first.
4. Pay the minimum on every debt, then send the rest of the budget to the debt at the top.
5. When the top debt is cleared, keep the budget the same and move its money to the next debt. The freed minimum joins the extra, so the payment grows each time.
6. Repeat until the last debt is gone.

The avalanche does not care about balance size, so your first cleared account may be a large one that takes a year or more.

How the debt snowball works, step by step

The debt snowball orders your debts by balance, smallest first, and ignores the interest rate.

1. List every debt with its balance, APR and minimum payment.
2. Set one monthly budget that covers all the minimums.
3. Sort the list by balance, smallest first. If two balances match, put the higher rate first.
4. Pay the minimum on every debt and send the rest to the smallest balance.
5. When it is cleared, roll its payment into the next smallest. The payment grows like a snowball rolling downhill, which gives the method its name.
6. Repeat until you owe nothing.

The method is best known from the US radio host Dave Ramsey. According to Ramsey Solutions, Baby Step 2 is paying off all debt except the mortgage with the debt snowball, listing debts smallest to largest regardless of interest rate, with one exception: tax debt goes to the top of the list whatever its size. The maths is the same whoever teaches it: the order changes how much interest you pay, not the rule of paying minimums everywhere.

Worked example: $15,500 of debt paid off with snowball and avalanche

With 3 debts totalling $15,500 and a budget of $650 a month, the avalanche costs $4,599.15 in interest and clears everything in 31 months; the snowball costs $5,148.22 and takes 32 months. These figures come from RightSums's debt payoff planner engine, run on 27 September 2026.

The minimums add up to $400, so $250 a month is extra. The snowball sends it to the personal loan first (smallest balance). The avalanche sends it to Card A first (highest rate).

The snowball costs $549.07 more and 1 extra month, and in return you close your first account 8 months sooner (month 7 instead of month 15). Either plan beats paying only the minimums, which would take 82 months and cost $12,583.99 in interest, almost 3 times the avalanche.

To reproduce this, enter the 3 debts above and a $650 budget in the debt payoff planner. The engine charges APR divided by 12 on each balance every month, pays every minimum, then sends the rest to the target debt. It assumes fixed minimums, no new spending, no fees and no rate changes. Real card minimums usually fall as the balance falls, and lenders often charge interest daily, so your statements will differ by a few dollars.

Is the debt snowball or avalanche faster?

The avalanche is usually the faster of the two on the same debts and budget, but often by only 0 or 1 month. The time to debt-free depends mostly on the size of your monthly budget; the order mainly changes the interest bill.

Raising the budget from $650 to $800 saves $1,167.79 under the avalanche, more than twice what the choice of method saves. If you can find extra money each month, that matters more than the order.

When the debt snowball costs very little extra

The snowball costs little or nothing extra when your smallest debt also has the highest rate, when the smallest debt is tiny, or when all your rates are close. In those cases you get the quick win almost for free.

In each case Card A ($4,500 at 24.99%) and Card B ($9,000 at 21.99%) are unchanged. With a $700 loan the snowball clears it in month 3 instead of month 13, for $73.19 over the whole plan. A quick test: if you can clear the smallest debt within about 3 months using your extra payment, the snowball rarely costs much.

A hybrid plan: one quick win, then the highest rate

A hybrid plan clears one small debt first for motivation and then switches to the highest rate. It sits between the two methods on cost. You can set any order you like with the "your own order" option in the planner.

In this example the quick-win hybrid is the same as the snowball, because after the loan Card A is both the next smallest balance and the highest rate. The hybrid that pays Card A first and then the loan costs $157.23 more than the pure avalanche but clears 2 accounts by month 18. The worst order, paying the biggest low-rate card before the dearest card, costs $744.72 more than the avalanche.

What the research says about small wins

A 2012 study in the Journal of Marketing Research found that closing whole accounts, not the dollars repaid, predicted whether people finished getting out of debt. David Gal and Blakeley McShane of Northwestern University's Kellogg School of Management studied 5,943 clients of a US debt settlement firm.

According to the paper, closing debt accounts predicted debt elimination regardless of the dollar balance of the closed accounts, while the dollar balance closed did not predict it once the share of accounts closed was taken into account. Clients whose smallest debt was large relative to their total were less likely to settle even one account. The authors' simulation suggested that a client who kept clearing the smallest balances was 14% more likely to complete the programme after one year than one who cleared random balances.

Two limits matter. The clients were in a debt settlement programme, where the firm negotiated each account, not people paying cards off themselves. And the authors say that when rates and balances differ enough, the saving from the highest-rate order outweighs the motivation from closing accounts. Their suggestion is to know both the cheapest order and the motivational value of a closed account, then decide.

Balance transfers and consolidation loans can cut the rate itself

A balance transfer or a consolidation loan lowers the interest rate you pay, which can save more than either payoff order. They work alongside the snowball or avalanche, not instead of them.

• Balance transfer card. You move card debt to a new card with 0% or low interest for a set time, usually for a one-off fee. According to the CFPB, a card company may charge a balance transfer fee on a 0% offer, and a US introductory rate must last at least 6 months unless you are more than 60 days late. New purchases on the card may be charged the normal rate straight away. MoneyHelper says UK balance transfer cards often charge no or low interest for several months, usually for a one-off fee.
• Consolidation loan. One new loan repays several debts, leaving one monthly payment. MoneyHelper warns there are potential dangers, and a loan secured on your home puts the home at risk.

Check the sums before you switch. In the main example the avalanche pays $755.45 of interest on Card A over 15 months. A fee of 3% on its $4,500 balance would be $135, so a 0% deal lasting at least 15 months would come out ahead, provided you stop using the old card. Model the card on its own with the credit card payoff calculator, which shows the months and interest at any payment.

What minimum payments mean on UK and US credit cards

A credit card minimum payment is set to cover the interest plus a small slice of the balance, so paying only the minimum can take years. The UK and the US have different rules to warn you.

UK: the FCA minimum and persistent debt rules

According to the Financial Conduct Authority's Consumer Credit sourcebook (CONC 6.7.5R), a card's minimum must at least repay the interest, fees and charges applied, plus 1% of the amount outstanding. Under CONC 6.7.27R, if over 18 months you paid more in interest, fees and charges than you repaid of the balance, you are in persistent debt, and the card firm must tell you and point you to free debt advice.

If the pattern continues for a further 18 months (36 months in all), CONC 6.7.30R and 6.7.31R require the firm to help you repay faster, and to propose ways to clear the balance within a reasonable period, which CONC 6.7.32G sets at between 3 and 4 years. If you do not respond, the firm must suspend or cancel the card (CONC 6.7.35R). If you cannot afford to pay more, the firm should show forbearance, which may include reducing, waiving or cancelling interest, fees or charges (CONC 6.7.37R and 6.7.38G). If a card firm does not follow these rules, complain to it first and then to the Financial Ombudsman Service; the complaints guide sets out the route and time limits.

US: the CARD Act minimum payment warning

US card statements must carry a box headed "Minimum Payment Warning" under Regulation Z, 12 CFR 1026.7(b)(12), which put the Credit CARD Act of 2009 into effect. The box shows how long you will take to pay the balance with minimum payments only and the total cost. Unless that estimate is 3 years or less, it also shows the monthly payment that would clear the balance in 36 months and the saving. According to the CFPB, you do not have to pay more than the minimum, and the figures assume you make no new purchases.

The minimums-only column in the worked example shows the cost: 82 months and $12,583.99 of interest, against 31 months and $4,599.15 with the avalanche.

Where to get free debt help in the UK and the US

Free, non-profit debt advice is available in both countries, and you never need to pay a company to set up a repayment plan.

• StepChange (UK-wide): a debt charity whose advice is free. It can set up debt management plans and advise on Debt Relief Orders, Individual Voluntary Arrangements, bankruptcy and Breathing Space.
• National Debtline (England, Wales and Scotland): free advice from a charity run by the Money Advice Trust, on 0808 808 4000, Monday to Friday 9am to 8pm and Saturday 9:30am to 1pm.
• MoneyHelper (UK, government-backed): its debt advice locator finds free, confidential advice online, by phone or face to face. It says to get free advice quickly if you are worried about missing a priority payment, have already missed one, or face bailiffs, a court summons, an energy cut-off or repossession.
• NFCC (US): the National Foundation for Credit Counseling is a network of nonprofit agencies with certified credit counselors, on 800-388-2227.

According to the CFPB, credit counselling organisations are usually non-profit, but some still charge. Ask for a price in writing, and avoid any agency that will not help you because you cannot pay, or that offers a debt management plan without first looking at your budget. The CFPB names the NFCC and the Financial Counseling Association of America as places to start.

Your next step: list every debt from your latest statements, enter them in the debt payoff planner with the most you can pay each month, and compare the avalanche, snowball and your own order before you set up the payments.