UK Stock Calculator (LSE/AIM)

About UK Stock Calculator (LSE/AIM)

Calculate your exact trading costs, UK taxes (SDRT 0.5% & PTM Levy), broker commissions, and net profit scenarios for London Stock Exchange (LSE) and AIM equities with UK Stock Calculator!

Whether you invest through Hargreaves Lansdown, AJ Bell, Interactive Investor, Freetrade, Trading 212, or high-street bank brokers (Barclays Smart Investor, HSBC InvestDirect), UK Stock Calculator provides instant, regulatory-accurate trade cost calculations tailored specifically for the UK equity market.

KEY FEATURES:

1. BUY COST CALCULATOR (GBX PENCE & GBP £)
- Dual Currency Input: Enter prices in pence (e.g. 350.0p) or pounds (£3.50) with live conversion feedback (≈ £3.50 per share), matching UK broker quote screens.
- Computes exact total purchase cost, consideration, broker commission, and average cost per share.
- Supports both Flat Fee (£0.00, £3.99, £5.00, £11.95) and Percentage (%) commission models with optional Minimum Fee Floors (e.g. 0.25% min £6.00).

2. ACCURATE UK TAX ENGINE (HMRC & TAKEOVER PANEL)
- Stamp Duty Reserve Tax (SDRT): Automatically computes 0.5% buy-side SDRT using official HMRC FA86 S99(13) standard round-half-up precision.
- Built-in SDRT Exemption Toggles: Easily waive 0.5% SDRT for AIM-listed growth shares, ETFs, and New Share Allotments / Primary Offerings.
- PTM Levy: Automatically adds the £1.50 Takeover Panel PTM Levy when consideration exceeds £10,000.00 (updated for the latest Takeover Code revision), and correctly exempts ETFs.
- No SDRT on Sells: Accurately reflects UK tax law (equity sales are 100% SDRT-free).

3. SALES & 101 SCENARIO ANALYZER (P&L SIMULATOR)
- 🎯 Instant Break-Even Banner: Highlights the exact sell price needed to clear all round-trip buy and sell costs.
- 📈 101-Tick Scenario Matrix: Generates -50 to +50 tick price targets around your purchase price, auto-scrolling to center the break-even target on load.
- Dual Display: View sell scenarios in both pence and pounds (e.g. 55.0p / £0.550).
- Color-Coded Profit & Loss: Clear visual distinction with [PURCHASE] and [BREAK-EVEN] badges, soft green profit rows, and soft red loss rows.

4. ACCOUNT WRAPPERS & TAX AWARENESS
- Tag trades with your account wrapper: General Investment Account (GIA), Stocks & Shares ISA, or SIPP.
- Helpful educational reminders that while ISAs and SIPPs shelter capital gains and dividends, SDRT and PTM levies still apply at the trade level.

5. TRADE HISTORY & SAVED TRANSACTIONS
- Save calculated trades locally to your personal portfolio history.
- 1-Tap Recalculate: Tap [View Sales / Recalc] on any saved trade card to instantly reload it into both the Buy tab and the Sales tab scenario matrix.
- Clean financial cards displaying total consideration in neutral dark tones (never misleading red) alongside exact average cost per share.

6. UK GDPR & ICO COMPLIANT
- 100% Offline Calculation: Your trade quantities, prices, and calculations remain securely stored on your local device.
- Full UK Data Protection Act 2018 / UK GDPR compliance via Google UMP SDK with 1-tap consent reset in Settings.

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UK REGULATORY FEE & TAX SUMMARY:
- SDRT (Stamp Duty): 0.5% on UK electronic share purchases (Round-half-up to nearest 1p)
- SDRT Exemptions: AIM shares, Exchange Traded Funds (ETFs), Primary allotments
- PTM Levy: £1.50 on trades exceeding £10,000.00 (Buy & Sell sides, non-ETFs)
- Sell-Side Taxes: £0.00 (No SDRT on sales)

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PRIVACY & DISCLAIMER:
- 100% Offline calculation — no personal financial data is collected or uploaded.
- Reference Tool: Always verify final contract notes and fee schedules with your FCA-regulated broker.

Download UK Stock Calculator today to trade LSE and AIM shares with complete cost clarity!