Debt Payoff Calculator — UK

Pay off multiple UK debts using the Avalanche or Snowball strategy and see exactly when you'll be debt-free.

Your Debts

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Strategy

Payoff Summary

Add your debts and click Calculate

Debt Payoff Calculator UK — Become Debt-Free Faster with a Clear Strategy

If you have multiple debts — credit cards, personal loans, overdrafts, or buy-now-pay-later balances — this calculator helps you build a structured payoff plan. By choosing either the Avalanche method (highest interest rate first) or the Snowball method (smallest balance first), you can see exactly when each debt will be cleared and how much interest you'll save compared to making only minimum payments.

UK households carry an average of over £33,000 in total debt (excluding mortgages) according to the Money Charity. Credit card APRs in the UK average around 23%–30%, while arranged overdrafts typically charge 39.9% EAR. Tackling high-interest debts strategically can save thousands of pounds and years of repayments.

Avalanche vs Snowball — Which Strategy Is Best?

Both methods involve paying the minimum on all debts and directing any extra money towards one debt at a time. Once a debt is cleared, you "roll" that payment onto the next debt — creating a snowball or avalanche effect.

Avalanche method: Target the highest-interest debt first (e.g., credit cards at 29.9% APR before a personal loan at 8%). Mathematically optimal — you pay the least total interest overall.
Snowball method: Target the smallest balance first regardless of interest rate. Psychologically motivating — clearing debts quickly builds momentum and confidence.
Research suggests the snowball method leads to better real-world results for many people because of the motivational boost from early wins, even if it costs slightly more in interest.
Either method is vastly better than paying only minimums — on a £3,000 credit card at 23.9% APR, minimum payments can take over 20 years to clear.

How to Use This Calculator

Add each debt — name, outstanding balance, interest rate, and current minimum payment.
Enter your total monthly budget for debt repayments.
Choose your strategy — Avalanche (lowest cost) or Snowball (fastest wins).
Click Calculate to see your payoff order, month-by-month plan, and debt-free date.
Compare both strategies to decide which suits your situation best.

Key Terms

EAR (Equivalent Annual Rate): Used for overdrafts and credit cards in the UK — the annual interest rate including compounding. Since April 2020, UK banks must charge a maximum of 39.9% EAR on arranged overdrafts. Unarranged overdrafts and declined payment fees are also capped under FCA rules.
Minimum Payment: The smallest amount you must pay each month on a credit card or revolving credit facility. UK minimum payments are typically 1%–3% of the balance plus interest, or £25 — whichever is greater. Paying only minimums on high-balance cards can take decades to clear.
Buy Now Pay Later (BNPL): Short-term credit offered at checkout by providers like Klarna, Clearpay, and Laybuy. BNPL balances often charge 0% interest but include late payment fees. Missed payments can be reported to credit reference agencies. Include BNPL balances in your payoff plan.
Debt Consolidation: Taking out a single new loan to pay off multiple debts, typically at a lower interest rate. Can simplify repayments and reduce monthly outgoings. Common UK options include personal loans, 0% balance transfer credit cards, and secured loans (against your home — use with caution).
Individual Voluntary Arrangement (IVA): A formal debt solution in England, Wales, and Northern Ireland (similar to a Protected Trust Deed in Scotland) where you agree to pay back an affordable amount over typically 5–6 years. Remaining debt is written off at the end. Administered by an Insolvency Practitioner and affects your credit file for 6 years.

Tips for Paying Off UK Debt

Balance transfer cards — if you have credit card debt, a 0% balance transfer card can freeze interest for 12–30 months, letting you pay off the capital faster. Compare deals on MoneySuperMarket or MoneySavingExpert.
Check if your overdraft rate is higher than your credit card rate — since the FCA overdraft reforms in 2020, many overdrafts charge 39.9% EAR which is often higher than credit cards.
Contact StepChange or National Debtline for free, impartial debt advice — both are FCA-authorised and completely free to use.
If you're struggling, ask creditors about a breathing space — under the Debt Respite Scheme, you can get 60 days of legal protection from creditor action while you seek advice.
Avoid debt management companies that charge fees — free debt advice from StepChange or Citizens Advice is identical in quality.
Once debts are cleared, build a 3-month emergency fund to avoid returning to debt for unexpected expenses.

Frequently Asked Questions

The fastest way mathematically is the Avalanche method — paying off the highest-interest debt first while making minimums on others. This minimises total interest and gets you debt-free soonest. For credit card debt specifically, a 0% balance transfer card can eliminate interest entirely for 12–30 months, making every payment go directly towards clearing the balance.

For most UK households, the priority order is: (1) emergency fund of £1,000, (2) pay off high-interest debt (credit cards, overdrafts), (3) build a 3–6 month emergency fund, (4) save for the future. There's no point saving at 4% while paying 29.9% on a credit card — clearing the debt first is equivalent to a guaranteed 29.9% return. Exception: if your employer offers pension matching, contribute enough to get the full match before overpaying debt.

Yes, significantly. UK mortgage lenders assess your debt-to-income ratio and existing credit commitments. Outstanding credit card balances, personal loans, and car finance all reduce the mortgage amount you can borrow. Even unused credit card limits can affect affordability calculations. Clearing existing debts before applying for a mortgage improves both the amount you can borrow and the rates available to you.

StepChange Debt Charity (stepchange.org) is the UK's leading free debt advice service — they offer a full debt review and personalised action plan online or by phone (0800 138 1111). National Debtline (nationaldebtline.org) is another excellent free resource. Citizens Advice also provides free debt guidance at local offices and online. All are FCA-authorised and completely free — never pay for debt advice.

A Debt Relief Order (DRO) is a formal insolvency solution in England and Wales for people with debts under £30,000 (as of 2024 the debt threshold was removed), no assets over £2,000, and surplus income under £75/month. The DRO freezes debt repayments for 12 months — if your situation hasn't improved, the debts are written off. It costs £90 to apply (waived in some circumstances) and affects your credit file for 6 years. Apply through an authorised debt adviser, not directly.

Since the FCA's 2020 overdraft reforms, most UK banks charge 39.9% EAR on overdrafts — significantly higher than personal loan rates (5%–20% APR). If you regularly use your overdraft, it's almost always cheaper to take out a personal loan to clear it and repay at a lower rate. Overdrafts are useful for short-term cash flow gaps but expensive if used long-term.