Discussion
Should a basic rate tax payer put £20k into a SIPP or an ISA assuming the annual return from each is equal?
As I understand it:
ISA - No tax but no government contribution.
SIPP - Government contribute 25% + withdrawals are 25% tax free But remaining 75% taxed at normal rate.
When I do a spreadsheet of all this it looks like SIPP gives a better return when taking cash out than ISA for the above assumptions. But is that the case?
TIA
As I understand it:
ISA - No tax but no government contribution.
SIPP - Government contribute 25% + withdrawals are 25% tax free But remaining 75% taxed at normal rate.
When I do a spreadsheet of all this it looks like SIPP gives a better return when taking cash out than ISA for the above assumptions. But is that the case?
TIA
You also may be able to get all the SIPP money out tax free over a number of years if all income is within your personal tax allowance plus the 25% (£16xxx pa).
My Mrs doesn’t have much in pensions so this is what we’ll probably do when she hits the age she can get at them (she is only 42 now).
My Mrs doesn’t have much in pensions so this is what we’ll probably do when she hits the age she can get at them (she is only 42 now).
duckson said:
You also may be able to get all the SIPP money out tax free over a number of years if all income is within your personal tax allowance plus the 25% (£16xxx pa).
My Mrs doesn’t have much in pensions so this is what we’ll probably do when she hits the age she can get at them (she is only 42 now).
Good point, but won't apply in my case though thanks.My Mrs doesn’t have much in pensions so this is what we’ll probably do when she hits the age she can get at them (she is only 42 now).
Don't know if it is a potential issue that withdrawing money from a pension limits how much you can put in going forwards. https://www.hl.co.uk/__data/assets/pdf_file/0005/4... discusses
MikeStroud said:
Should a basic rate tax payer put £20k into a SIPP or an ISA assuming the annual return from each is equal?
As I understand it:
ISA - No tax but no government contribution.
SIPP - Government contribute 25% + withdrawals are 25% tax free But remaining 75% taxed at normal rate.
When I do a spreadsheet of all this it looks like SIPP gives a better return when taking cash out than ISA for the above assumptions. But is that the case?
TIA
Tax credit is only paid on the amount paid in, if your wife has relevant earnings of that level or higher within that year. So if you wanted to pay in £20k, this will be increased to £25k including the tax credit, providing your wife has relevant earnings within that year of £25k. i.e. a gross salary of £25k+As I understand it:
ISA - No tax but no government contribution.
SIPP - Government contribute 25% + withdrawals are 25% tax free But remaining 75% taxed at normal rate.
When I do a spreadsheet of all this it looks like SIPP gives a better return when taking cash out than ISA for the above assumptions. But is that the case?
TIA
It doesn't cost you £20k to put £20k into a SIPP - you're actually only investing £16.7k. For the rest of the duration until you draw down you're seeing the (hopeful) compound increase in value of the HMRC contribution, which you aren't getting in the ISA. To put it another way if you do pay £20k into the SIPP you're going to get the compound growth on an additional £4000.
Mr Pointy said:
It doesn't cost you £20k to put £20k into a SIPP - you're actually only investing £16.7k. For the rest of the duration until you draw down you're seeing the (hopeful) compound increase in value of the HMRC contribution, which you aren't getting in the ISA. To put it another way if you do pay £20k into the SIPP you're going to get the compound growth on an additional £4000.
But then you pay tax on it which you don’t in an isa. I think on balance putting it in the SIPP gives a better return. Thanks. MikeStroud said:
Mr Pointy said:
It doesn't cost you £20k to put £20k into a SIPP - you're actually only investing £16.7k. For the rest of the duration until you draw down you're seeing the (hopeful) compound increase in value of the HMRC contribution, which you aren't getting in the ISA. To put it another way if you do pay £20k into the SIPP you're going to get the compound growth on an additional £4000.
But then you pay tax on it which you don’t in an isa. I think on balance putting it in the SIPP gives a better return. Thanks. MikeStroud said:
Should a basic rate tax payer put £20k into a SIPP or an ISA assuming the annual return from each is equal?
As I understand it:
ISA - No tax but no government contribution.
SIPP - Government contribute 25% + withdrawals are 25% tax free But remaining 75% taxed at normal rate.
When I do a spreadsheet of all this it looks like SIPP gives a better return when taking cash out than ISA for the above assumptions. But is that the case?
TIA
Key distinctions are:As I understand it:
ISA - No tax but no government contribution.
SIPP - Government contribute 25% + withdrawals are 25% tax free But remaining 75% taxed at normal rate.
When I do a spreadsheet of all this it looks like SIPP gives a better return when taking cash out than ISA for the above assumptions. But is that the case?
TIA
- inheritance tax treatment
- tax treatment on way out. With sensible planning ie. Making use of the 25% tax free slowly rather than all at once, average rate on way out will be lower than average rate on way in, thereby beating ISA
- isa wealth matters with regards to assessments of means tested benefits. Pension wealth does not
If you are using the ISA for retirement, might make sense to go down the LISA route first for the 25% bonus.
Jawls said:
Key distinctions are:
- inheritance tax treatment
- tax treatment on way out. With sensible planning ie. Making use of the 25% tax free slowly rather than all at once, average rate on way out will be lower than average rate on way in, thereby beating ISA
- isa wealth matters with regards to assessments of means tested benefits. Pension wealth does not
If you are using the ISA for retirement, might make sense to go down the LISA route first for the 25% bonus.
When you take the 25% tax free makes very little difference to the average.- inheritance tax treatment
- tax treatment on way out. With sensible planning ie. Making use of the 25% tax free slowly rather than all at once, average rate on way out will be lower than average rate on way in, thereby beating ISA
- isa wealth matters with regards to assessments of means tested benefits. Pension wealth does not
If you are using the ISA for retirement, might make sense to go down the LISA route first for the 25% bonus.
He's 55 so a LISA is out.
Carbon Sasquatch said:
Jawls said:
Key distinctions are:
- inheritance tax treatment
- tax treatment on way out. With sensible planning ie. Making use of the 25% tax free slowly rather than all at once, average rate on way out will be lower than average rate on way in, thereby beating ISA
- isa wealth matters with regards to assessments of means tested benefits. Pension wealth does not
If you are using the ISA for retirement, might make sense to go down the LISA route first for the 25% bonus.
When you take the 25% tax free makes very little difference to the average.- inheritance tax treatment
- tax treatment on way out. With sensible planning ie. Making use of the 25% tax free slowly rather than all at once, average rate on way out will be lower than average rate on way in, thereby beating ISA
- isa wealth matters with regards to assessments of means tested benefits. Pension wealth does not
If you are using the ISA for retirement, might make sense to go down the LISA route first for the 25% bonus.
He's 55 so a LISA is out.
I’d be surprised if the 25% timing didn’t make much of a difference over a long retirement given the pot should continue to grow for 20+ years, though to be fair I’ve not spreadsheeted it.
Jawls said:
I’d be surprised if the 25% timing didn’t make much of a difference over a long retirement given the pot should continue to grow for 20+ years, though to be fair I’ve not spreadsheeted it.
Depends what you do with the 25% I guess - if it can continue to grow at the same rate outside of a SIPP, but still free from tax.Alternatively, I will be front loading my spending & the 25% tax free will form part of that. By using it, I can avoid my taxable withdrawals putting me into the 40% bracket in the early years. Taking the 25% evenly over the life of the SIPP would put me in a worse overall position.
With most on pensions, there's no universally right answer

Welshbeef said:
Jawls said:
- isa wealth matters with regards to assessments of means tested benefits. Pension wealth does not
.
Wasn’t aware of this but potentially a big issue for many. .
Basically they will count an ISA as savings & say you should spend it first before benefits. However, they won't insist you spend all your pension and drain your SIPP to zero.
However, if you chose to take money out of the SIPP, that is fair game to be offset against benefits.
handy graph thingy on here https://www.vanguardinvestor.co.uk/articles/latest...
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