Avalanche
Usually lowest total interest because extra money goes to the highest APR first. Mathematically tidy, emotionally slower if the biggest balance is first.
Lowest interest is not always the only answer
Snowball
Usually pays more interest but clears small balances first, which can make the plan feel real and free up attention.
Useful guidance
Frequently asked questions
The questions readers most commonly ask about this topic. Each answer is reviewed by the UK Tax Drag editorial team against current HMRC, FCA and MoneyHelper guidance.
▸ Should I use the avalanche or snowball method?
Avalanche pays off the highest interest rate first — mathematically cheapest. Snowball pays off the smallest balance first — psychologically most rewarding. For UK households with mixed credit-card and loan debt, avalanche typically saves £100-£500 in interest on a typical debt mix. But studies show snowball completion rates are higher because the early wins motivate. If you're disciplined, use avalanche; if you need motivation, use snowball.
▸ When should I consider a debt consolidation loan?
Consolidation makes sense when you can secure a personal loan at a lower rate than your card APRs, AND you commit to not using the cards again. Typical scenario: combining £8,000 across 3 cards at 22-29% APR into a personal loan at 8-12% APR. Calculate total interest on each path. Risk: many people consolidate then run cards back up — track utilisation closely.
▸ What's the difference between an IVA, DRO and bankruptcy?
Debt Relief Order (DRO): for debts under £30,000 with low income and assets — debts written off after 12 months. IVA: a formal 5-year arrangement to pay creditors a percentage of debt — keeps you out of bankruptcy. Bankruptcy: court process discharging most debts after 12 months but with serious credit/asset implications. All three appear on your credit file for 6 years. Speak to free debt help (StepChange, National Debtline) before formal options.
▸ Can I negotiate with creditors directly?
Yes — especially with debt collection agencies (DCAs) who often buy old debts for pennies on the pound. Many will accept 30-50% as full settlement, but this DOES appear on your credit file as "partially settled" which lenders treat negatively. Always get any settlement agreement IN WRITING before paying — verbal offers don't bind the creditor. Free help: StepChange and Citizens Advice will negotiate on your behalf.
▸ What is the FCA persistent debt rule?
Since 2018, FCA rules require credit card issuers to flag customers who pay more in interest and charges than they repay in principal over 18 months. The issuer must contact you with options to repay faster, and after 36 months of persistent debt the issuer may need to take action — including reducing your credit limit or suspending the card. The rule protects consumers but doesn't automatically write off debt.
▸ Will paying off debt improve my mortgage application?
Yes significantly. Lenders look at your debt-to-income ratio and minimum monthly debt servicing costs when assessing affordability. Clearing or reducing credit card balances 3-6 months before applying improves both. Closing the cards immediately after isn't necessary — having low utilisation on open accounts can actually strengthen the application, provided the cards aren't maxed out.
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