Second Home Stamp Duty Calculator Guide

Additional-property stamp duty can materially change the cash needed to complete. Use an estimate early and confirm the position with a conveyancer or tax adviser.

Start with these estimates

Primary tool Estimate stamp duty Helpful next check Estimate deposit need

Calculator outputs are estimates only. They do not confirm lender acceptance, product availability, rates, fees or suitability.

This page is written as a calculator companion: use it to choose sensible inputs, compare scenarios and understand the limits of an estimate.

What to check before relying on the estimate

Select the additional-property option when using the stamp duty calculator.
Check whether replacement-main-residence rules could apply to your situation.
Remember that Scotland and Wales use different property tax systems.

When an adviser review may help

A mortgage adviser or broker partner can compare your circumstances with lender criteria and explain any fees before you decide whether to proceed. This website provides general information and calculator tools; it provides general information only and does not make regulated mortgage recommendations.

Keep the estimate realistic

Use current balances, evidenced income, realistic property values and cautious rate assumptions. If a result looks affordable only under one optimistic assumption, run a second scenario before making plans.

Frequently asked questions

Does every second property pay the surcharge? +

Not always. The rules depend on ownership, residence replacement and timing. Take tax or conveyancing guidance.

Is this calculator legal or tax guidance? +

No. It provides an estimate only and is not a substitute for professional guidance.

Browse mortgage calculators Compare repayment, borrowing, affordability and stamp duty estimates. Check your affordability Estimate affordability from income and commitment assumptions. Estimate monthly repayments Model repayments using your own rate, term and deposit assumptions.

Calculator-led mortgage planning

UK Mortgage Calculators is centred on practical estimation tools. The pages help you model cautious scenarios before you decide whether to request a broker or adviser callback.