Commentary on Sections Overview Overview
76.This Chapter deals with the calculation of a person’s income tax liability for a tax year.
77.The calculation sets out how the rules about the rates at which income is charged, and provisions about reliefs, allowances, tax reductions etc, are applied to the components of a person’s total income to arrive at the person’s income tax liability.
78.The calculation does not deal with amounts of tax suffered (eg under PAYE or by way of deduction of tax at source) as these are set off against a person’s liability rather than deducted in arriving at it. See section 59B(1) of TMA.
79.Nor does it deal with relief given by discharge or repayment, as here too the relief can operate only once the amount of a person’s liability has been determined. Examples of such reliefs include paragraph 6 of Schedule 14 to ICTA (life insurance relief for non-residents) and section 416 of CAA (mineral extraction allowance - expenditure on restoration within 3 years of ceasing to trade).