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HMO Stamp Duty Calculator

Calculate stamp duty land tax for your HMO property purchase.

Modern HMO Property
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  1. Enter the property purchase price
  2. Select if this is an additional property (3% surcharge applies)
  3. Choose if you qualify for any reliefs or exemptions
  4. Select property location (England, Wales, Scotland, N. Ireland)
  5. Review your total stamp duty liability
Note: Always confirm current rates with HMRC before completing.
How We Calculate Stamp Duty
Methodology & Data SourcesUpdated October 2025

Calculation Formulas

Standard Stamp Duty
Purchase Price × Stamp Duty Rate

Basic stamp duty calculation

Additional Property Surcharge
Standard Stamp Duty + 3% of Purchase Price

Additional 3% surcharge for buy-to-let properties

Data Sources

HMRC stamp duty rates (October 2025)
UK Government property tax guidelines
Land Registry transaction data

Key Assumptions

First-time BuyerNo

Assumes not a first-time buyer

Additional PropertyYes

Assumes buy-to-let purchase

Property ValueAs entered

Based on user input

Calculation Accuracy

Stamp duty calculations based on current HMRC rates. Rates may change with government policy updates.