Micro-SDRT / Local Transaction Stamp
The Formal Definition
Statutory transaction taxes levied by specific sovereign jurisdictions on equity purchases (such as the UK 0.5% Stamp Duty Reserve Tax or the French/Italian Financial Transaction Taxes), collected automatically by the clearing broker regardless of profit outcome.
Net Purchase Outlay = (Purchased Shares × Price) + Local Statutory Stamp Percentage (e.g., UK SDRT = 0.50%)
Cole Barrett's Reality Check
The Unvarnished Bottom Line"If you buy a UK stock, HMRC takes a 0.5% bite out of your principal the second your order fills. That is the Stamp Duty Reserve Tax. It applies to purchases whether you make a profit or lose your shirt. Day-trade London stocks without using tax-free derivatives like Spread Betting, and SDRT alone will bleed your account dry."
Interactive Simulator: Test the Math
Real-World Example: Scenario Breakdown
Examining the real numbers for: Active trading account executing £100,000 in UK physical equity turnover per month
| Execution Metric | UK Spread Betting Account (SDRT Exempt) | Direct Physical Equity Day Trader |
|---|---|---|
| Fee / Rate | Spread-only pricing | £3.00 ticket fee |
| Spread / Buffer | Traded UK index and equity price action via financial spread bets | Bought underlying physical London Stock Exchange shares |
| Execution / Status | Spread bets are legally classified as derivatives exempt from UK Stamp Duty | Broker automatically deducted 0.50% SDRT on every purchase leg |
| Total Cost / Result | Saved £6,000 annually in statutory transaction taxes | Suffered 6% annual portfolio drag purely from statutory transaction taxes |
How Brokers Weaponize This Term
International brokers advertising '0% commission on global shares' omit disclosing that statutory local stamp duties (such as 0.5% UK SDRT or 0.3% French FTT) are passed through to the client on purchases.
Broker Evaluation Matrix
Cole Approves
IG / Interactive Brokers: Provides transparent breakdown of statutory exchange levies and SDRT exemptions via UK Spread Betting and derivative accounts.
Read Audit →Cole Flags / Avoids
Unclear Foreign Brokers: Buries foreign transaction taxes in general currency exchange line items without separate tax-accounting receipts.
View Trap Details →Frequently Asked Questions
Do you pay UK Stamp Duty on share sales?
No. The UK Stamp Duty Reserve Tax (SDRT) is levied only on equity purchases; selling shares incurs zero stamp duty.
Are UK ETFs and AIM-listed shares subject to 0.5% Stamp Duty?
No. Exchange-traded funds and shares listed on the Alternative Investment Market (AIM) are legally exempt from UK SDRT.