On 1 April 2013, the company rate of income tax was changed from 35% to 30%. At the previous reporting date (30 June 2012) Montgomery Limited had the following tax balances:
Deferred tax assets$26 250
Deferred tax liabilities$21 000
What is the impact of the tax rate change on income tax expense?
When you originally computed the DTA and DTL, you calculated the timing difference – the difference between, say, depreciation for taxes and depreciation for financial statements – and multiplied that by 35% to get the tax effect. If the tax rate had been 30%, you would have multiplied by 30% instead. So, now that the tax rate has changed, you divide by 35% (to get back to the original timing difference: the difference in the original depreciation amounts), then multiply by 30% (as you would have done if that had been the tax rate).