It is a general principle of taxation that, as far as possible, income from all sources should be subject to taxation. In line with this principle, occupational and social welfare pensions are, therefore, reckonable as income for tax purposes. Treating pension payments as income for tax purposes is essentially a matter of equity.
The extent, if any, to which taxation will actually arise in a given case will essentially depend on the level of income other than the social welfare pension that a recipient has in the same tax year. If there is no other income in addition to the social welfare payment, the existing exemption limits and allowances can be expected to ensure that there is no tax to be paid on the social welfare income itself.
Under the normal income tax system, an individual taxpayer is entitled to have certain allowances and reliefs taken into account in calculating their tax liability. Any income greater than the sum total of the allowances and reliefs is then taxed at 24 per cent and-or 46 per cent as appropriate. Such allowances include the personal allowances (single or married allowances, age allowance, PAYE allowance, blind allowance, etc.) and reliefs such as that for health expenses, medical insurance, qualifying rent relief etc.
Alternatively, if more favourable to the taxpayer, he or she may be taxed under the exemption limits-marginal relief system. Under this system individuals are provided with exemption limits, which are higher than the normal personal allowances, and are taxed at 40 per cent on all income above the exemption limits until their level of income is such that it would be more favourable to be taxed under the normal tax system. However, the exemption limits displace the normal personal allowances and reliefs, including medical insurance relief. For historical reasons people on exemption limits-marginal relief continue to be eligible for mortgage interest relief subject to the usual conditions. It must be stressed that if you are being taxed under the marginal relief system you are in fact paying less tax than if you were being taxed under the normal tax system.