CGT threshold question

Ciprico

If someone had a large CGT bill, ie realised £55k CG selling shares in one year is it the case it would be in their interest to keep income down to below £50k.

ie as basic rate tax payer they pay CGT at 10% on 55k, but if their income crept into HR tax, they would pay 20% tax on the 55k CG...

...so earning an extra pound to put them in HRT would generate a £5k extra tax bill.... 

Have I understood correctly ? I appreciate the figures above may not be 100% accurate, but they hopefully demonstrate my problem

(Death and dementia got in the way of planning to avoid this situation)

MX5huggy

No because they will pay 20% on any CG that takes them over the threshold any way:- 

If you pay basic rate Income Tax

If you’re a basic rate taxpayer, the rate you pay depends on the size of your gain, your taxable income and whether your gain is from residential property or other assets.

1. Work out how much taxable income you have - this is your income minus your Personal Allowance and any other Income Tax reliefs you’re entitled to.

2. Work out your total taxable gains.

3. Deduct your tax-free allowance from your total taxable gains.

4. Add this amount to your taxable income.

5. If this amount is within the basic Income Tax band you’ll pay 10% on your gains (or 18% on residential property). You’ll pay 20% (or 28% on residential property) on any amount above the basic tax rate.

https://www.gov.uk/capital-gains-tax/rates