Calculate stamp duty

Estimate residential SDLT for an England or Northern Ireland purchase completed under rates in force from 1 April 2025.

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ToolStamp Duty Calculator
Input
Output
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How it works

Price is divided across progressive bands beginning with 0% to £125,000, while first-time buyer relief uses 0% to £300,000 and 5% to £500,000. Above the £500,000 relief ceiling standard bands apply to the full price, and an additional property adds 5% of total price.

Formula
SDLT = sum of price portion in each band × band rate
  • Buyer type is required because no status can be safely assumed.
  • The result labels its effective date rather than presenting these thresholds as permanent.

Worked example

A 300,000 main home
Standard rates, no relief or surcharge
Input
											Price: 300000
Buyer type: main
Output
												Tax: 5000
Effective rate percent: 1.67
Tax year: from 1 April 2025
Surcharge rate percent applied: 0

When to use this

Solicitor completion statements, first-time buyer budgets, and buy-to-let acquisitions use purchase price and buyer status to reserve cash for SDLT.

Edge cases

  • A first-time purchase of exactly £500,000 receives relief, while £500,000.01 loses relief and uses standard bands on the whole price.
  • An additional property adds 5% of total price, not 5% only above the nil-rate threshold.
  • Scottish LBTT, Welsh LTT, non-resident surcharges, corporate purchases, linked transactions, and lease rent NPV are outside this calculation.

References