Change of basis of computing taxable profits: changes in tax adjustment
S227 Income Tax (Trading and Other Income) Act 2005, S180 Corporation Tax Act 2009
A ‘tax adjustment’ is defined as any adjustment required or authorised by law in computing profits of a trade for Income Tax or Corporation Tax purposes.
Tax adjustments are made where tax legislation or case law requires a departure from the profits computed in accordance with GAAP. An example is the capital/revenue divide, which means that depreciation is added back in the tax computations.
Changes made to comply with new legislation are excluded
Where there is new legislation it applies from a specific date. Any transitional effects will often be dealt with by the new legislation. The adjustment income and expenses provisions do not apply to a change that is made in order to comply with legislation that was not applicable to the previous period of account.
Changes made as a result of a change in understanding are included
Tax adjustments may change as a result of a change in understanding of what is required or authorised by law. The adjustment income and expenses provisions do apply to such changes.