Mortgage Calculator UK
$0.00 / month
How UK Mortgage Repayments Are Calculated
This calculator uses the standard amortizing-loan formula on the amount you borrow (property price minus deposit) at your quoted annual interest rate divided into monthly compounding, spread evenly over the mortgage term. Unlike a US mortgage payment, the monthly figure shown here is principal & interest only — UK mortgage lenders do not typically collect property tax or insurance into the mortgage payment itself, so there's no escrow or PMI to add. If you choose "interest-only," the monthly payment covers just the interest and the full mortgage amount remains due at the end of the term, so budget separately for repaying that balance. Figures on this page are formatted in dollar-style notation ($) purely for consistency with the rest of this site — the math applies equally to pounds sterling.
Stamp Duty Land Tax Is a Separate, One-Time Cost
Stamp Duty Land Tax (SDLT) is charged on property purchases in England and Northern Ireland (Scotland and Wales use their own separate land transaction taxes) and is due at completion — it is not financed into your mortgage or reflected in your monthly payment above. The estimate shown uses simplified standard, first-time-buyer, and additional-property band rates as a rough guide; always confirm the exact figure with a solicitor or the current government SDLT calculator, since bands and thresholds change periodically and this is only an estimate for the property price entered. Also budget separately for buildings insurance, which UK lenders require you to hold but which is arranged and paid outside the mortgage itself, unlike US-style insurance escrow.
Comparing Deposits and Rates
A bigger deposit lowers your loan-to-value (LTV) ratio, which often unlocks meaningfully better interest rates from UK lenders — dropping from 90% to 75% LTV, for example, can move you into a materially cheaper rate tier. Try adjusting the deposit above to see how both the monthly payment and total interest respond. If you're also weighing how a larger deposit affects affordability more broadly, the house affordability calculator and down payment calculator can help you plan how much to put down.
Frequently Asked Questions
Why doesn't the monthly payment include property tax or insurance?
UK mortgages work differently from US mortgages: lenders generally do not collect council tax or buildings insurance into your monthly mortgage payment via an escrow account. This calculator therefore shows principal & interest only, which matches how UK lenders quote mortgage payments. You should budget for buildings insurance and council tax separately.
Is the Stamp Duty Land Tax figure exact?
No, it's a simplified estimate based on standard SDLT bands for home movers, first-time buyers, and additional-property purchases in England and Northern Ireland. Actual SDLT depends on your specific circumstances, any reliefs you qualify for, and current thresholds, which change periodically, so always confirm the exact amount with a solicitor or conveyancer before completion. Scotland and Wales use separate land transaction taxes with different rates.