capital gains

[jess222]

how many years am i liable for capital gains?
if i failed to make a payment how many years must pass before i am no longer liable?

[kags]

HMRC can go back 20 years if there has been deliberate or negligent failure to disclose income or gains.

Is this a hypothetical question, or have you got a skeleton in your closet? If so, the best way forward is to voluntarily disclose it - but get some professional advice first.

[buildersmate]

Presumably since you refer to making payments, you've been previously assessed by HMRC anyway for a previous capital gain. You'd probably have to be declared bankrupt to remove the debt if such a point has been reached,