Mortgage Calculator UK
The UK mortgage calculator provides page-specific estimates to help you calculate your monthly mortgage payments and see how interest rates affect your loan.. Updated for 2026 UK statutory rules and reference parameters, it computes instant results tailored to your inputs.
Monthly Payment
£0.00
Total Repayment
£0.00
Total Interest
£0.00
How the UK Mortgage Calculator Works
Last updated: October 2026This calculator uses the standard mortgage amortisation formula: M = P × [r(1+r)^n] / [(1+r)^n − 1], where P is principal, r is monthly rate, and n is total months. Enter loan amount, interest rate, and term to view monthly payment, total interest, and total cost.
Inputs & Output Metrics
Required Input Parameters
- Principal / Initial Amount (£)
- Annual Interest Rate / Tax Band (%)
- Repayment Term / Duration
Calculated Output Results
- Total Repayment / Net Amount (£)
- Periodic Payment Breakdown (£)
- Total Interest / Duty Fee (£)
Mortgage Calculator Worked Calculation Example
Loan Amount: £250,000
Interest Rate: 4.5%
Term: 25 Years
Monthly Repayment = £1,389.58
Explanation: Calculated using 300 monthly repayments with monthly interest amortisation.
Assumptions & Limitations
Model Assumptions
- Assumes a constant interest rate and fixed compounding schedule throughout the term.
- Assumes all payments are made on time according to the selected frequency.
- Calculations use standard amortisation equations.
Real-World Limitations
- Results are for illustrative estimation only and do not constitute financial or mortgage advice.
- Does not account for arrangement fees, valuation charges, broker fees, or early redemption penalties.
- Actual lender rates and terms depend on formal credit assessment and underwriting.
Frequently Asked Questions
How does a UK mortgage calculator work?
A UK mortgage calculator uses the standard amortisation formula with your loan amount, annual interest rate, and repayment term to compute your fixed monthly payment, total interest charged, and total amount repayable.
What is a typical mortgage interest rate in the UK in 2026?
UK mortgage rates in 2026 typically range between 4% and 6% depending on your loan-to-value ratio, credit history, and fixed versus variable deal.
How much can I borrow for a mortgage in the UK?
Most UK lenders apply an income multiple of 4 to 4.5 times your annual gross salary. For example, earning £45,000 per year may allow you to borrow between £180,000 and £202,500.
What is the difference between a repayment and interest-only mortgage?
A repayment mortgage covers both interest and loan capital each month so the debt decreases over time. An interest-only mortgage pays only monthly interest, leaving the capital balance due at the end.
How accurate is this mortgage calculator?
Our calculator provides highly accurate estimates based on standard UK amortisation equations. For formal mortgage offers, speak with a UK mortgage broker.
Disclaimer: This calculator is provided for informational and estimation purposes only and does not constitute financial, tax, or legal advice. Tax rates and financial rules reflect 2026 UK standards where applicable.