What you need to know:
UK Tax Year – the UK tax year runs from the 6th April one tax year to the 5th April the next.
Gross Pay – total self employed income before tax is deducted under the construction industry scheme.
Expenses – total expenses incurred in the tax year.
Tax Paid – total self employed tax paid under the construction industry scheme.
Class 4 National Insurance – Class 4 National Insurance is deducted by HMRC if you earn over a certain amount and is in addition to any tax paid. The CIS Tax Refund Calculator gives an estimated CIS tax refund after both tax and Class 4 NIC have been deducted.