High Income Child Benefit Tax and Capital Gains on SAYE Scheme maturity.

Hi, I'm yet to find a clear answer on the relationship between P60 Income and how cashing in SAYE shares is calculated on high income child benefit tax. For Example; P60 has an income of £50,000 through PAYE. SAYE of £15,000 invested results in £30,000 when shares cashed in. Profit £15,000 and £9, 000 to pay the capital gains tax on. In Self-Assessment, would it then add the £15,000 to the £50,000 income of the P60, thus triggering a 100% repay of the child allowance, plus 40% tax, NI and also £1,800 (20%) Capital Gains tax? I'm assuming if I have paid CGT on the Profit, I should not also be paying a second 40% income tax, but how does it affect the High Income Child Benefit Tax calculation? Confused of Bexhill.

Hi kesrpaul,
The capital gains income will not be included for the adjusted net income for Higher Income Child Benefit Charge. HICBC. 
Thank you.