Tax on trading profits is one of those topics that new traders avoid thinking about until they absolutely have to. The rules in the UK are actually more straightforward than most people expect, and one common method of trading is entirely tax-free. Here's what you need to know, in plain English.
Spread Betting: Tax-Free for Most Traders
If you trade via spread betting — which is available through most major UK brokers — your profits are currently exempt from Capital Gains Tax and Income Tax. HMRC classifies spread betting as gambling, which means winnings are not taxable. This applies regardless of how much you make, provided trading is not your sole source of income in a way that HMRC might classify as professional gambling.
For the vast majority of retail traders — those who trade alongside employment or other income — spread betting profits are simply tax-free. You don't need to declare them on your self-assessment tax return.
The flip side is that losses from spread betting cannot be offset against other gains for tax purposes. You can't use a bad trading year to reduce your Capital Gains Tax bill elsewhere. This is the trade-off for the tax-free treatment of profits.
CFD Trading: Subject to Capital Gains Tax
If you trade via CFDs (Contracts for Difference), your profits are subject to Capital Gains Tax. You're allowed an annual tax-free allowance — check the latest HMRC figures for the current tax year as this changes — and any profits above that threshold are taxed at either the basic or higher rate depending on your total income.
Losses from CFD trading can be offset against other capital gains, which is one advantage over spread betting if you're actively managing a broader investment portfolio. You can also carry forward unused losses to future tax years.
If you trade CFDs, you need to keep records of every trade: date, instrument, position size, entry price, exit price, and profit or loss. Your broker will usually provide a statement, but keeping your own records in a trading journal is good practice and makes tax time significantly less painful.
When Does Trading Become a Business?
This is the grey area that concerns some traders. If trading is your primary source of income and you do it full-time with the characteristics of a business — dedicated office, regular hours, systematic approach — HMRC could potentially argue that you're running a trading business, in which case profits would be taxed as income rather than capital gains.
In practice, this is unusual for retail traders, but it's worth being aware of. If you're approaching the point where trading income is replacing employment income, a conversation with a tax professional is a sensible step.
Practical Steps to Stay Organised
Keep a trading journal. Record every trade with dates, sizes, and outcomes. Download your broker statements regularly. If you trade CFDs, calculate your total gains and losses at the end of each tax year. Set aside money for any tax due rather than spending all your profits — a common mistake that catches new profitable traders off guard.
If you're just starting out and using spread betting, the practical answer is simple: your profits are tax-free, but keep records anyway. Good record-keeping is a habit that will serve you well regardless of the tax situation.
Note: This is general information, not tax advice. Tax rules can and do change. Always consult a qualified tax professional or accountant for advice specific to your personal circumstances.