Stamp Duty Reserve Tax (SDRT)
The Formal Definition
A mandatory 0.5% government tax levied by the UK HM Revenue & Customs (HMRC) on electronically purchased shares of UK-incorporated companies.
SDRT = Transaction Value (£) × 0.005
Cole Barrett's Reality Check
The Unvarnished Bottom Line"If you buy shares in British giants like Shell, Rolls-Royce, or AstraZeneca, HMRC takes a 0.5% cut off the top before your trade even clears. It applies to both zero-fee and legacy platforms, acting as an unavoidable tax drag on UK equity pickers."
Interactive Simulator: Test the Math
Real-World Example: Scenario Breakdown
Examining the real numbers for: £10,000 purchase of a UK-domiciled equity (e.g., Barclays PLC)
| Execution Metric | Buying London-Listed Shares | Trading via Spread Bet / Overseas ETF |
|---|---|---|
| Fee / Rate | £0.00 platform commission | Spread embedded |
| Spread / Buffer | 0.5% mandatory SDRT tax: £50.00 | Exempt from UK Stamp Duty |
| Execution / Status | Deducted automatically at trade settlement | No SDRT charged under UK tax code |
| Total Cost / Result | Instant 0.5% performance deficit | Saved £50.00 in tax friction |
How Brokers Weaponize This Term
UK neobrokers promote '0% commission UK share dealing' in banner ads, leaving retail buyers surprised when their account balance shows a 0.5% SDRT government deduction on every UK stock trade.
Broker Evaluation Matrix
Cole Approves
Pepperstone / IG: Tax-free UK spread betting accounts that trade UK equities without triggering the 0.5% Stamp Duty Reserve Tax.
Read Audit →Cole Flags / Avoids
Misleading 'Zero-Fee' UK Desks: Omits SDRT tax estimates on pre-trade execution screens.
View Trap Details →Frequently Asked Questions
Do London-listed ETFs pay Stamp Duty?
No. Exchange-Traded Funds (ETFs) trading on the London Stock Exchange are legally exempt from the 0.5% UK Stamp Duty Reserve Tax.
Does SDRT apply when selling shares?
No. Stamp Duty Reserve Tax applies exclusively to the purchase of shares, not to sales.