UK Mortgage Repayment Calculator (2026)
Calculate monthly UK mortgage repayments, total interest and amortization schedule from loan amount, interest rate and term.
United Kingdom Calculator
Adjust Your Inputs
Move the sliders or type exact numbers. Results update instantly.
Instant Estimate
Your Results
Monthly Repayment
£1,498
Based on your selected mortgage repayment calculator assumptions. Try different sliders to compare scenarios.
Total Interest
£199,436
Total Paid
£449,436
These calculations are financial projections and planning estimates, not tax, legal or licensed financial advice. HMRC 2025/2026 statutory rates, NI thresholds, and local council rates apply.
How to Use the Mortgage Repayment Calculator
Enter property purchase price
Input the agreed property valuation or target home purchase price.
Specify deposit amount
Enter your cash deposit to establish your Loan-to-Value (LTV) ratio.
Set mortgage interest rate and term
Input the fixed or tracker interest rate and repayment tenure (e.g., 25 or 30 years).
Formula & Calculation Methodology
Monthly Repayment = Loan amortized over mortgage termThis calculator uses standard United Kingdom financial formulas, IRS thresholds, and amortization schedules. All results compute instantly in your browser with zero data stored or transmitted.
Calculation Examples & Scenarios
First-Time Buyer (£280,000 Property)
£280,000 purchase price, 10% deposit (£28,000), 4.5% 5-year fixed rate over 30 years.
Remortgage with 60% LTV (£450,000 Property)
£450,000 property, £270,000 remaining balance, 4.0% rate over 20 years.
Key Benefits
- Calculates monthly capital and interest payments for UK residential mortgages
- Determines exact Loan-to-Value (LTV) tier for competitive lender mortgage rates
- Visualizes total interest paid over 25, 30, and 35-year amortizations
Common Use Cases
- First-time buyers checking affordability before securing a Mortgage Agreement in Principle (AIP)
- Existing homeowners comparing remortgage deals at the end of a 2-year or 5-year fixed period
- Testing the financial impact of extending mortgage terms to reduce monthly outgoings
How UK Mortgage Repayments Work
On a capital repayment mortgage, each monthly instalment covers both the interest charged by the bank and a portion of the original loan balance. In the early years, the majority of your payment goes toward interest, while in later years, the balance decreases rapidly as capital repayments accelerate.
Your Loan-to-Value (LTV) ratio dictates the interest rate lenders offer. Typically, reaching LTV thresholds of 85%, 75%, and 60% unlocks significantly lower mortgage interest rates.
Frequently Asked Questions
Changes to the Bank of England base rate directly influence standard variable rate (SVR) and tracker mortgages. For fixed-rate deals, base rate changes affect swap rates and dictate the pricing of new fixed-rate mortgages offered by lenders.
A 2-year fix provides flexibility to remortgage sooner if market rates drop, but requires paying arrangement fees more frequently. A 5-year fix offers payment certainty, budgeting stability, and protects against sudden inflationary rate hikes.
On a £250,000 mortgage at 5.25% over 25 years, an extra regular overpayment of £200 per month saves over £32,000 in interest and shortens your mortgage term by more than 4 years.
LTV is the percentage of the property value you borrow versus your cash deposit. Major pricing tiers exist at 90%, 85%, 75%, and 60% LTV. Reaching 60% LTV unlocks the lowest headline interest rates from UK lenders.
UK mortgage lenders are required by the FCA to verify that you could still afford repayments if mortgage interest rates increased by 1% to 3% above their standard variable reversion rate.
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