Re: Calculation of average tax rate re top slicing relief on a redundancy pmt?
bazermc: Your formula is correct but I still think the one in IT21 is easier to follow (same thing expressed a different way).
Pegasus: The taxable portion of your lump sum will be taxed at your marginal rate, assume 42%. At the end of the tax year, your Top-Slicing Relief will kick in, but you need to ask for it !
If the taxable part of your lump sum is 20,000 then you will pay 8,400 tax up front.
For the preceding 5 years, the calculation is actually very straight forward, especially if you received a balancing statement for those 5 years from revenue. For the 5 years lets say your reckonable income was 40k, 42k, 44k, 46k, 48k (Total income 220k) and even though your marginal tax rate was 42% each year, with ALL of the usual tax credits taken into account, you paid tax of 12k, 13k, 14k, 15k and 16k (total tax 70k), then your average tax rate for the 5 years was 70/220 x 100 = 31.8% so your Top Slicing Relief will be
20k x ( 42% - 31.8% ) = 2,036
Your question about tax credits and pension contributions can be answered as follows ...
¬ The relevant tax credits are already taken care of in determining your tax for each of the 5 years. It is treated no differently for the purposes of this calculation
¬ Pension contributions represent a reduction in reckonable income and I stand to be corrected, but I believe it is reckonable income and not gross income that is considered in the calcs for the 5 years.