Mortgage Calculator UK
Calculate a UK residential mortgage payment and the Stamp Duty Land Tax (SDLT) due on the purchase by region — England, Wales, Scotland, Northern Ireland.
How to use the Mortgage Calculator UK
- Enter your inputs into the Mortgage Calculator UK above.
- Results update instantly as you type — no submit button needed.
- Adjust any value to see how the result changes in real time.
The UK mortgage and stamp duty math
Monthly = P · r(1 + r)^n / ((1 + r)^n − 1) · · · Stamp duty = sum of slice × bracket rate
UK mortgages amortize monthly using the same formula as US. SDLT is regional and progressive — England/NI use SDLT, Scotland uses LBTT, Wales uses LTT — each with its own bracket structure.
Worked example
A £400,000 home in England with £80,000 deposit, £320,000 mortgage at 5.5% over 25 years: monthly ≈ £1,965. SDLT for a first home £400,000: £5,000 (above £300,000 first-time relief threshold). Total upfront: £85,000.
Frequently asked questions
How do UK fixed-rate mortgages work?
Most UK borrowers take a 2- or 5-year fixed rate that reverts to a Standard Variable Rate (SVR) afterward. The full amortization period (typically 25–30 years) is set separately from the fixed term.
What is stamp duty?
A progressive tax on property purchases. Brackets and rates vary by region and buyer category (first-time buyer, second home, non-resident). The calculator handles each region's structure.
What is loan-to-value (LTV)?
The mortgage as a percentage of property value. Lower LTV (larger deposit) qualifies for better rates. UK lenders price aggressively at 60%, 75%, 85% and 90% LTV thresholds.