Free UK tool · Debt free calculator UK
Whether it's credit cards, personal loans, car finance, or all three — find the fastest, cheapest path out. Free, private, no sign up. Add as many debts as you like, pick avalanche or snowball, and see exactly when you're debt-free.
Your data never leaves your device. Ever.How to use
The debt payoff calculator UK above runs a month-by-month simulation across all your debts. Here's how to get a useful answer.
Below the headline you'll see your debt-free date, total interest paid under each strategy, the saving from picking the better one, and milestone markers (first debt cleared, halfway point, debt-free date).
Avalanche vs Snowball
Two well-known approaches with different trade-offs. The calculator above shows the difference for your specific debts — here's the plain-English version of the choice.
Pay minimums on every debt, then throw all extra cash at the debt with the highest interest rate. When that's cleared, roll its freed-up payment into the next-highest-rate debt. Repeat until you're debt-free. This minimises total interest paid because you're killing the most expensive debt first.
Pay minimums on every debt, then throw all extra cash at the debt with the smallest balance, regardless of interest rate. Once that's cleared, the next-smallest. Each cleared debt is a visible win, and the freed-up minimum payment "snowballs" into the next target. Slightly more interest paid in total, but the early wins keep many people from giving up.
Interest is the real enemy. £5,000 at 22% costs you £92/month just standing still. £5,000 at 6% costs £25/month. Killing the 22% debt first frees up £92/month of "interest you're not paying anymore" that compounds against your remaining debts. Snowball clears smaller debts faster but lets the high-interest beasts grow longer. On typical UK debt mixes, avalanche saves £500–£2,000 over the payoff period.
Personal finance research from Northwestern Kellogg and others has found that people on snowball plans stick with them longer. The first cleared debt is a real, visible win — usually within the first 6–12 months. Avalanche's first win can take 18+ months if your highest-rate debt also has the largest balance. If you've started debt payoff plans before and given up, snowball's quick wins are worth the slightly higher total cost.
Run the calculator with both strategies and look at the gap. If avalanche saves £200 versus snowball, take snowball — the £200 buys you motivation insurance. If avalanche saves £2,000+ and you're confident you'll stay disciplined, take avalanche. The worst outcome is not picking either and drifting through minimum payments.
UK specifics
Average UK credit card APR sits around 23–28%. Specific products vary widely: standard purchase cards 18–25%, rewards cards 22–32%, store cards often 30%+. 0% balance transfer cards remain widely available — typical offers run 18–30 months at 0% with a 2–4% transfer fee. For high-interest credit card debt, transferring to a 0% card is often the fastest single change you can make. Run this calculator on your post-transfer balances and rates to see the new payoff timeline.
UK credit cards typically charge the higher of (a) interest plus 1% of balance, (b) a fixed minimum like £5 or £25, or (c) a flat 1–3% of balance. The exact formula is in your card's terms. A £3,000 balance at 22% APR has ~£55/month interest, so a minimum of ~£85/month is common. Paying only the minimum is the trap — it can keep a single £3,000 card alive for 20+ years and cost more in interest than the original balance.
UK mortgage lenders subtract a year's worth of monthly debt payments from your gross income before applying their multiple — £400/month of debt is £4,800/year, knocking ~£19,000 off a 4× borrowing limit. Credit scores (Experian, Equifax, TransUnion) react positively to lower utilisation, reliable payments, and longer account history. Aim for credit utilisation below 30% on each card. Don't close older accounts after payoff — keeping them open lengthens your credit history.
Secured debt (mortgage, car finance, secured loans) is backed by an asset — miss payments and the lender can repossess. Unsecured debt (credit cards, most personal loans, overdrafts, store cards) isn't tied to an asset. Unsecured debt typically has higher interest because the lender's risk is greater. For payoff prioritisation, the rate matters more than secured/unsecured — but for missed payments, secured debts are the much bigger risk because losing an asset is worse than a credit-score hit.
If unsecured debts are over £5,000 and you genuinely can't afford the minimums, regulated UK options exist: Debt Management Plan (DMP) — informal, you pay an affordable amount distributed across creditors, interest may be frozen. Individual Voluntary Arrangement (IVA) — formal 5-year agreement, typically clears unsecured debts above what you can repay, but stays on your credit file for 6 years. Charity-run advisers like StepChange and National Debtline give free, regulated advice — call before you miss payments, not after.
FAQ
The questions people most often type into Google about UK debt payoff.
Three levers: cut spending and throw the freed-up cash at debt; order your debts properly (avalanche method saves most money); consider consolidating high-interest credit-card debt onto a 0% balance-transfer card to stop interest while you pay it down.
The calculator above lets you list every debt, set an extra monthly payment, and compare avalanche vs snowball outcomes side-by-side.
It runs a month-by-month simulation. Each month, interest is added to every debt, the minimum is applied to each, and any extra is directed at one specific debt based on the strategy you've picked.
As debts clear, their freed-up minimums roll into the next target debt — the "snowball effect" — accelerating payoff over time.
Avalanche (highest interest first) saves the most money. Snowball (smallest balance first) gives faster psychological wins.
If you've struggled to stick with debt payoff before, snowball's quick wins are worth the extra money. If discipline isn't the bottleneck, avalanche wins on pure maths. The calculator shows both side-by-side for your specific debts.
On a £5,000 credit card balance at 22% APR with only the minimum payment, it takes roughly 22 years and costs ~£8,000 in interest. With £150/month flat, ~4 years 6 months and ~£2,800 interest. With £250/month flat, ~2 years 4 months.
The minimum-payment trap is real. The calculator above models your specific balance, rate, and payment to show the exact difference.
List every debt with its balance, APR, and minimum monthly payment. Add the extra you can throw at debt each month — anything beyond the sum of minimums. Pick avalanche or snowball.
The calculator simulates each month: interest accrues, minimums get paid, the extra goes to your chosen target debt. Output: debt-free date, total interest paid, comparison between methods, and milestone markers.
Compare interest rate vs expected investment return. Credit-card debt at 20%+ should be cleared first — impossible to beat by investing. Personal loans at 6–10% are borderline. Mortgage at 4–5% is below long-run equity returns, so most UK savers continue mortgage payments at the contractual rate while investing extra cash.
General order: clear high-interest debt → emergency fund → max ISA/pension → overpay mortgage if no other use for the cash.
UK lenders typically calculate the minimum as the higher of (a) interest plus 1% of balance, (b) a fixed amount like £5 or £25, or (c) 1–3% of balance.
A £3,000 balance at 22% APR has ~£55/month interest, so minimums of ~£85 are common. Paying only the minimum can keep that £3,000 debt alive for 20+ years.
Yes. UK credit scores react positively to lower utilisation, reliable payments, and aged accounts in good standing. Paying down balances below 30% of the credit limit on each card can lift scores quickly.
Don't close old accounts after payoff — keeping them open improves your credit history length, which boosts your score for future mortgage applications.
The full picture
Vault is the home for everything this calculator hints at — your debts, savings, accounts, net worth, and how each cleared debt moves the needle. Same principles: free, private, local only. Nothing you enter ever leaves your device.
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