This is a very simple UK self employed (sole trader) net profit calculator for the 2017/18 tax year.
Simply enter your fees after allowable business expenses, your current personal tax allowance (eg., £11,500 is the current allowance for a single person younger than/or 65 years of age) and select the payment interval before clicking the calculate button.
PLEASE NOTE that your use of this calculator is at your own risk and should not be construed as financial advice.