Most people think about crypto tax when they file, which is months after the tax year has already ended. By then, the useful decisions have already been made for you by the calendar. The real value is in looking ahead, while there is still time to act.
Why timing is the whole game
Capital Gains Tax is worked out per tax year, which runs to 5 April. Several of the most useful levers, your annual exempt amount, the timing of a disposal, and the realising of losses to set against gains, are tied to that year end. Miss it, and the opportunity does not roll over.
The levers worth understanding
- The annual exempt amount. Everyone has a tax-free allowance for capital gains each year. It has shrunk considerably in recent years, but it is still use-it-or-lose-it, and spreading disposals across tax years can make a real difference.
- Loss relief. Losses can be set against gains, and crypto portfolios often contain unrealised losses sitting quietly alongside the winners. Realising them thoughtfully can reduce a bill, though the rules on how and when matter.
- Disposal timing. When you choose to dispose can change which tax year a gain lands in, and therefore which year's allowances and rates apply.
- Pooling and matching rules. HMRC's share pooling, same-day, and thirty-day rules decide which coins you are treated as selling. They are not intuitive, and they can change the answer significantly.
A word of caution
Planning means arranging your genuine affairs efficiently and entirely within the rules. It does not mean anything artificial, and the matching rules in particular exist precisely to stop the naive "sell and rebuy" moves people read about online. Done properly, though, thoughtful timing and loss use are simply good housekeeping.
What good planning looks like
In practice it is a short, focused review before the tax year closes: what you hold, what you are likely to do, and where allowances or losses can be used before they expire. For anyone with meaningful crypto holdings, that conversation usually pays for itself.
This article is general information, not tax advice, and the rules and figures can change between tax years. Please get in touch for advice on your own circumstances.