How to avoid capital gains tax when selling shares?

Smart Ways to Reduce Your Capital Gains Tax Bill

When you sell shares for a profit, capital gains tax (CGT) can take a noticeable bite out of your returns. But with a bit of planning, you can legally reduce what you owe. The key is to make smart use of allowances and reliefs before hitting “sell.”

Start with your annual CGT allowance—everyone has one, and unused portions can’t be rolled over, so make sure it’s used each year. If you’re married or in a civil partnership, transferring assets between spouses can effectively double the allowance, as transfers between partners are tax-free.

Have you made a loss on other investments? Don’t forget to report capital losses. They can be offset against gains to reduce your overall tax bill. And always deduct allowable costs like broker fees or platform charges—these lower your taxable gain.

Looking ahead, boosting pension contributions not only secures your future but can also reduce taxable income, indirectly helping with CGT rates if you’re near a threshold. Another powerful tool: your ISA allowance. Each year, you can shelter up to £20,000 in an ISA. With “Bed and ISA,” you sell shares and immediately reinvest the proceeds into a stocks and shares ISA, locking in gains tax-free going forward.

Finally, donating shares to charity can be a win-win. Not only do you support a cause, but you also avoid CGT entirely on the donation—plus, higher-rate taxpayers may claim income tax relief.

These aren’t loopholes but smart uses of the system. With thoughtful planning, you can keep more of what you’ve earned.