Same goal, opposite starting point
Both methods assume the same thing: you keep paying the minimum on every debt, and you put every extra rand you can find into exactly one debt at a time until it is gone. Then you roll that whole payment onto the next one. The only difference is which debt you attack first.
- Debt snowball: pay off the smallest balance first, regardless of interest rate.
- Debt avalanche: pay off the debt with the highest interest rate first, regardless of balance.
Both are meant for unsecured debt such as store accounts, credit cards and personal loans. Keep your home loan and vehicle finance payments up to date as normal, because missing those puts the property or the car at risk.
What South African debt actually costs
Before comparing methods, it helps to know how far apart your rates can really be. The National Credit Act sets a ceiling on the interest a lender may charge, linked to the repo rate. Under regulation 42, credit facilities (credit cards and store accounts) are capped at the repo rate plus 14%, and unsecured personal loans at the repo rate plus 21%. After the Reserve Bank raised the repo rate to 7.25% on 23 September 2026, that works out to ceilings of 21.25% and 28.25% a year. These are ceilings, not what everyone pays, so your agreement and statement show your actual rate.
That has two practical consequences. First, the gap between your debts is usually a few percentage points, not dozens: a store account at 21% against a personal loan at 27% is a six point difference. Second, the hike matters less than it feels. A quarter of a percentage point on a R15,000 balance is about R3 a month. The choice of which debt to attack first moves your costs far more than the rate decision does.
Fees matter too, especially on small balances. A credit facility can carry a monthly service fee of up to R69 including VAT, and many accounts add a credit life premium. On a R2,800 store account, that fee is a large share of the real cost, and it stops the day the account is closed.
The avalanche wins on paper
Mathematically, the debt avalanche is the cheapest. Interest is what makes debt expensive, so eliminating the highest-rate debt first stops the most damage the fastest. But the saving is smaller than most people expect, and a worked example shows why.
Say you owe three debts and can put R3,000 a month toward them:
- A store account: R2,800 at 21%, minimum R200.
- A credit card: R14,000 at 20%, minimum R420.
- A personal loan: R35,000 at 27%, minimum R1,450.
The minimums add up to R2,070, so R930 a month is the extra you can aim at one debt. This is an illustration that ignores fees and any rate changes, but the pattern holds:
- Avalanche (loan first, then store account, then card): debt free in 22 months, about R12,460 in total interest. The first account only disappears in month 17.
- Snowball (store account first, then card, then loan): also debt free in 22 months, about R13,550 in interest. The first account is gone in month 3.
On R51,800 of debt, the avalanche saves roughly R1,080 in interest and finishes at the same time. That is real money, and it is also about 2% of what you owed. The price of getting it is waiting 17 months for your first visible win.
The snowball wins on follow-through
The snowball is built around a different problem: most people do not fail at debt repayment because of the maths, they fail because they lose motivation. A widely cited 2012 study by David Gal and Blakeley McShane in the Journal of Marketing Research looked at about 6,000 people enrolled with a debt settlement company. It found that those who closed more of their accounts early were more likely to clear all of their debt, even when they started with more debt than others.
It is worth being honest about what that does and does not show. The data was observational and came from people already in a settlement programme, so it suggests that early wins help rather than proving the snowball causes success. But it matches what most people report, and there is a South African angle too: clearing an account ends its monthly service fee and any credit life premium, so the cash that was going to fees joins your repayment pool immediately. In the example, the store account's R200 minimum is freed up in month 3 and goes straight to the next debt.
A hybrid that costs almost nothing
You do not have to choose a pure method. A practical middle path is to clear the smallest debt first if you can do it within about three months, then switch to attacking the highest rate. In the same example, that order (store account, then personal loan, then card) clears the first account in month 3, finishes in the same 22 months, and costs about R12,600 in interest. That is roughly R136 more than the pure avalanche and about R950 less than the pure snowball.
So the question is not really which method is best. It is how much a fast first win is worth to you. If you have started and abandoned a repayment plan before, paying about R136 for the early momentum is cheap. If you are disciplined and motivated by the numbers, go straight to the highest rate.
What both methods need to work
Neither method works unless you know, in one place, every debt you owe, its balance, its interest rate and its minimum payment. Most people underestimate their total because the accounts live in different apps and different statements. A five-minute list, ordered both ways, is what makes either strategy possible. Your credit report is a good cross-check for accounts you have forgotten about.
Then stop the bleeding. If buy now, pay later purchases or new card spending keep adding balances while you pay old ones down, no method will show progress. And if a bonus or 13th cheque is coming before December, decide now which debt it goes to, before the festive season decides for you.
When neither method is enough
These methods assume you can at least cover your minimums. The NCR's Credit Bureau Monitor for the quarter to June 2025, the latest published figures, counted 29.24 million credit-active consumers, of whom 36.05% had impaired records and 22.46% were three or more months in arrears. If you are behind on minimums, or the interest is outrunning your payments, a repayment order will not fix it. Our guide to debt review or a consolidation loan explains the options that exist for that situation.
Quick answers
Which method pays off debt faster overall?
Usually the avalanche is cheaper, but not always faster. In the example above both finished in 22 months, and the avalanche saved about R1,080 in interest. The snowball can still come out ahead in practice if it is the only method someone sticks with to the end.
Should I stop saving while I pay off debt?
Not entirely. See save or pay off debt first for how to balance a small emergency buffer against high-interest debt repayment.
Can I switch methods partway through?
Yes, and it is common. Many people start with the snowball for early motivation, then switch to highest-rate-first once the momentum is there. The only rule is to keep paying the minimums on everything else while you do.
Tracking the payments as they disappear
Budget Hub has separate expense categories for credit cards, personal loans and store accounts, so each monthly repayment has its own line instead of being buried in general spending. It tracks the monthly repayment for each category, not the outstanding balance, so keep your balance list somewhere you will update after each payment.
Where it helps with this plan is the financial health score. Its debt component looks at your debt payments as a share of your income, with full marks at 10% or less and zero at 36% or more. Each time you clear a debt and update that category, its payment drops out and the score moves. That is the same visible win the snowball is built on, and it works whichever order you chose. Because your expenses are a single living figure rather than a month-by-month ledger, remember to update the category when a payment ends.