Forex trading tax in the UK depends on your instrument choice. The UK government taxes spread betting, CFDs, and other financial instruments differently, with significant implications for your tax position. For the 2025/26 tax year, your obligations depend on which instruments you use. Spread betting is exempt from capital gains tax (CGT), with profits being tax-free for UK residents trading through UK-based brokers.

Spread Betting vs CFDs

The primary distinction for UK forex trading tax is between spread betting and contracts for difference (CFDs). Spread betting offers tax efficiency—it's not subject to CGT and carries no stamp duty. CFDs are subject to CGT, with profits taxed accordingly. For 2025/26, the CGT exempt amount is £3,000, allowing you to make up to this amount in CFD profits before tax applies. CFD traders must maintain detailed records of all trades, including dates, times, and transaction details, to calculate their CGT liability accurately.

Allowable Expenses

You can claim allowable expenses against trading profits to reduce your tax liability. Eligible costs include trading software, computer equipment, and internet subscriptions. Travel expenses for trading seminars or workshops are deductible if directly related to your trading activity. HMRC permits expense claims for the 2025/26 tax year provided they're incurred wholly and exclusively for trading purposes. Maintain receipts and invoices as evidence.

Reporting Trading Profits to HMRC

Report your trading profits to HMRC via self-assessment tax return. The deadline for 2025/26 submissions is 31 January 2027. Complete the CGT pages of your tax return, detailing profits and losses from CFDs and other chargeable assets. Spread betting profits don't require reporting due to CGT exemption. Traders using both spread betting and CFDs must maintain separate records to ensure accurate reporting.

Record Keeping

Maintain detailed records of every trade—date, time, and transaction details—along with all expense receipts and invoices. Spreadsheet software or dedicated trading journals simplify tracking trades and calculating your tax liability. Organised records enable you to claim allowable expenses efficiently and respond to any HMRC enquiries.

HMRC Guidance

HMRC provides comprehensive guidance on forex trading tax, including specific rules for spread betting and CFDs. Their website contains dedicated sections on trading profits, allowable expenses, CGT, and record keeping requirements. For the 2025/26 tax year, the CGT exempt amount remains £3,000. Contact the HMRC helpline for advice on specific tax matters, and regularly review their website for regulatory updates to maintain compliance.