ISA v SIPP - Your SXX profits6 Aug 2018 15:51
ISA v SIPP
Both investment vehicles grow free of CGT and income tax. The following calculations are to help you get a feel for these investments and necessarily cannot take into account personal circumstances and so for simplicity reasons providers charges, inflation, the personal allowance, …, have been ignored.
Let's look at what happens to every £1,200 invested in an ISA compared to the same invested in a SIPP. You get tax relief at your marginal rate in a SIPP, so with £1,200 you can buy £1,500 worth of shares in a SIPP if you are a basic rate tax payer and £2,000 worth if you are a higher rate tax payer.
Basic Rate Tax Payer (20%) Higher Rate Tax Payer (40%)
ISA £1,200 £1,200
SIPP £1,500 £2,000
Ok, so you bought some shares and they have increased in value by a factor of 10. Well done! Now you have for every £1,200 originally invested,
Basic Rate Tax Payer (20%) Higher Rate Tax Payer (40%)
ISA £12,000 £12,000
SIPP £15,000 £20,000
The money in the ISA is yours immediately without further tax to pay, but that in the SIPP will be taxed at your marginal rate. So if you decide not to take the 25% tax-free lump sum (bad decision) from your SIPP you can extract £15,000 x 80% = £12,000 if you are a basic rate tax payer and £20,000 x 60% = £12,000 if you are a higher rate payer. Exactly what you have in your ISA! No advantage and you've just tied up your money. That's why you must take the 25% tax-free lump sum.
But you are wise and decide to take the 25% tax-free lump sum from your SIPP. Here is what you can extract (the last column is for when you were a higher rate payer paying in but a basic rate payer now you are taking your pension).
Basic Rate Tax Payer (20%) Higher Rate Tax Payer (40%) Higher (40%) to Basic (20%)
SIPP £12,750 £14,000 £17,000
% increase v ISA 6.25% 16.67% 41.67%
The figures are calculated as follows:
£12,750 = £3,750 + 0.8 x (£15,000 - £3,750) (£3,750 = £15,000 x 0.25, is your lump sum and the rest is taxed at 20%.)
£14,000 = £5,000 + 0.6 x (£20,000 - £5,000) (£5,000 = £20,000 x 0.25, is your lump sum and the rest is taxed at 40%.)
£17,000 = £5,000 + 0.8 x (£20,000 - £5,000) (£5,000 = £20,000 x 0.25, is your lump sum and the rest is taxed at 20%.)