HMO Stamp Duty Calculator

Calculate stamp duty land tax for your HMO property purchase.

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How We Calculate Stamp Duty

Methodology & Data SourcesUpdated March 2026

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

HMRC stamp duty rates (March 2026)

UK Government property tax guidelines

Land Registry transaction data

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.

This calculator is a planning tool. For current rates, lender criteria, and specialist advice:

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