Debt Repayment Calculator UK: Find Your Debt-Free Date
Information & education only - not regulated financial advice.
DebtRiot is a planning tool that shows “if X, then Y” based on the numbers you enter. Your lender statements are the source of truth.
A debt repayment calculator (UK) shows how your debts could change month by month, and the month/year you could clear your final balance - based on the balances, rates and payments you enter.
If you’re searching “when will I be debt free UK”, the useful output isn’t “a couple of years”. It’s a specific date you can track against.
DebtRiot is built for UK reality - including EAR overdrafts, APR credit cards/loans, 0% promotional deals with expiry months, and one-off snowflake payments - and it lets you compare five repayment strategies side-by-side before choosing what to follow.
What you’ll get from this debt repayment calculator (UK)
With DebtRiot, you can:
See your estimated debt-free date (month + year)
See each debt’s estimated payoff month
Compare 5 repayment strategies side-by-side (same inputs, different targeting order)
Preview the first 3 months of your schedule for free
Handle UK-specific rates correctly, including APR vs EAR
Model 0% promo periods by entering the expiry month
Add snowflake payments (one-off extra payments) to see how the schedule changes
If you’re also searching for a repayment plan calculator UK or debt repayment plan UK, this page explains what the calculator is doing, what to enter, and what to check before relying on the timeline.
How debt repayment calculators work
A repayment plan calculator runs a simple simulation:
Inputs (what you enter)
For each debt:
Current balance (what you owe today)
Rate type (APR or EAR)
Interest rate
Minimum payment (or fixed payment for loans)
For your plan:
Monthly debt budget (the total you want to put toward all debts each month)
The monthly simulation
Each month, the calculator:
Adds interest to each balance
Applies minimum payments
Sends any extra budget to the current “target” debt (based on the strategy)
Repeats until every balance reaches zero
Records the month each debt clears (and when the last one clears)
The rollover effect
When a debt clears, the payment that used to go to it can be redirected to the next target debt - this is the “rollover” that makes structured plans feel faster over time.
Example:
Debt A: £120/month
Debt B: £80/month
Debt C: £150/month
When Debt A clears:
Debt B: £200/month (£80 + £120 rollover)
Debt C: £150/month
When Debt B clears:
Debt C: £350/month (£150 + £200 rollover)
UK-specific accuracy: APR vs EAR (overdrafts)
Many generic tools treat all interest rates the same. In the UK, that can distort the timeline if you have an overdraft.
What’s the difference?
APR is commonly used for credit cards, loans and finance.
A simple monthly approximation is often: monthly rate = APR ÷ 12.EAR (Equivalent Annual Rate) is commonly used for UK overdrafts.
A monthly equivalent is often derived from compounding: (1 + EAR)^(1/12) − 1.
The same “headline percentage” can behave differently depending on whether it’s APR or EAR — which can change the month-by-month interest added, and therefore change the estimated payoff timeline.
DebtRiot supports both APR and EAR so overdrafts and credit cards can be modelled more realistically in the same plan.
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The 5 debt repayment strategies you can compare
DebtRiot shows five common targeting approaches side-by-side. Each one pays minimums first, then focuses extra budget on a chosen target debt.
1) Avalanche (highest interest first)
Targets the highest rate first (typically the mathematically fastest/lowest interest approach), while other debts receive minimums.
2) Snowball (smallest balance first)
Targets the smallest balance first (often creates earlier “clear” milestones), while other debts receive minimums.
3) Avalanche → Snowball (hybrid)
Starts with high-rate debts, then switches to small balances later.
4) Snowball → Avalanche (hybrid)
Starts with small balances first, then switches to high-rate debts later.
5) Cash Flow Index
Uses a ratio (often balance ÷ minimum payment) to prioritise debts that could free up monthly cash flow sooner - at the possible cost of higher total interest depending on rates.
To explore the methods in more detail, use the methods hub: Debt Payoff Methods UK
Example: UK debts compared (real numbers)
If you prefer to see how strategy comparison looks with real inputs, this walkthrough shows a UK-style mix (including an EAR overdraft) and how the “debt-free date” can shift by strategy:
| Debt | Balance | Rate | Type | Minimum |
|---|---|---|---|---|
| NatWest Overdraft | £1,800 | 39.9% | EAR | £60 |
| Tesco Credit Card | £2,200 | 21.9% | APR | £55 |
| Very Store Card | £450 | 39.9% | APR | £18 |
Total debt: £4,450 Monthly budget: £300 (£167 extra beyond minimums)
Repayment timeline by strategy:
| Strategy | Debt-Free | Total Interest | First Win | Savings vs Snowball |
|---|---|---|---|---|
| Avalanche | Oct 2027 | £687 | Store card (3 mo) | £78 |
| Snowball | Nov 2027 | £765 | Store card (3 mo) | — |
| Cash Flow | Dec 2027 | £812 | Overdraft (8 mo) | -£47 |
Key insight: In this scenario, avalanche and snowball both clear the store card first - but avalanche then prioritises differently, saving £78 and one month overall.
Your results will differ based on your balances, rate types, minimums, budget and any promo periods.
Step-by-step: get your estimated debt-free date in minutes
Step 1: Gather your figures (from statements/apps)
For each debt, note:
Balance (current amount)
Rate (and whether it’s APR or EAR)
Minimum payment (or fixed loan payment)
Overdraft tip: EAR is usually shown in your banking app under overdraft/account details.
Step 2: Choose how you want to enter your budget
DebtRiot supports two input styles:
Full budget route: income + essentials + emergency buffer → calculates what’s left for debt
Quick route: “I know my monthly debt budget” → skips income/essentials and goes straight to the amount you want to allocate
Step 3: Add your debts
Enter each debt, including:
APR or EAR (overdrafts)
0% promo deals with the expiry month (if applicable)
Any planned one-off snowflake payments (optional)
Step 4: Compare strategies
Use the side-by-side view to compare:
Estimated debt-free month/year
Which debt clears first under each strategy
How the repayment order changes after the first debt clears
Step 5: Save your date (in a way that works for you)
Some people use a calendar reminder, a note on the fridge, or a simple “month/year” milestone tracker. The tool provides estimates you can revisit by regenerating your plan on the same device if you choose the paid option.
Privacy-first by design (no account, no email capture)
DebtRiot is built to be useful without asking for your personal data.
No account required
No email capture
Your debt figures are calculated in your browser
No debt data stored server-side
Analytics only after consent
No ad tracking
You can enter numbers, compare strategies, and close the tab - with no inbox follow-ups.
When a calculator isn’t the right next step
A repayment plan calculator can be helpful for comparing timelines and repayment orders when minimums are manageable.
If you’re struggling with essentials or minimum payments, you can get free confidential help from StepChange or National Debtline.
Try the calculator
Try the calculator - compare 5 strategies for free and preview the first 3 months. Full Modern PDF plan + CSV exports are a one-time £9.99.
FAQ
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No. DebtRiot is an information and education tool. It shows estimates based on the numbers you enter. Your lender statements are the source of truth.
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Yes. DebtRiot supports EAR for overdrafts (and APR for credit cards/loans) so you can model mixed UK debts in one plan.
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Yes. You can either enter a full budget (income + essentials + buffer) or choose “I know my monthly debt budget” to skip income/essentials and use a single monthly amount.
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Yes. You can add 0% promo deals and include the expiry month, so the schedule changes when the rate changes.
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No. There’s no account and no email capture. Calculations run in-browser, with analytics only after consent.
