doublework2

Before starting a new tax year i want to make my finances more tax efficient. Currently £66k gross from employment of which 10% is currently salary sacrifice So £60k, then also through Self assessment i have an income of £8600 I want to increase my salary sacrifice from 10% to 37%, so that my employment gross is £41,400, and my annual total gross is therefore £50k, which removes higher rate tax, and also allows me to efficiently claim child benefit too as an extra.(i have children) If i increase my salary sacrifice to 37%, by the end of the tax year, will it work out that i am only paying tax on roughly £50k of income, and not the current roughtly £68k that is taxable. Thank you