“Owner-managed

Paying self-assessment tax by instalments

If you file your 2016-17 self-assessment tax return on or before 30 December 2017, you can elect to spread the repayment of any underpayment of tax for 2016-17 to the tax year 2018-19. This is done by amending your tax code for 2018-19 such that any arrears are repaid by increasing your tax payments each pay period.