Certainly there are some situation where a SIPP is worse, so yes, do the math. But they are the extreme exception rather than the rule.Lootman wrote:Yes but you are not comparing like with like. A true comparison would, for convenience sake, show the difference between putting 20K a year into an ISA and 20K (before any tax adjustment) into a SIPP. Assume the same RoR on each, and of course the same number of years. Then look at the drawdown and the effect of taxes on that (in the case of a SIPP).paulnumbers wrote: It's quite mechanical isn't it? as a higher rate tax payer utilising salary sacrifice and getting the employer NI contributions too, if you gave up £600k of earnings, the SIPP would have been topped up to £1.177m. If you're a lower rate tax payer in retirement, you'd pay 15% tax, so that would be reduced to £1,000,655. after tax. So yes, quite juicy!
If even you were a higher rate taxpayer in retirement for all of the income from the SIPP, you'd get £824,068 out
I am certainly not going to assert that an ISA wins in all scenarios. But I do challenge the idea that a SIPP wins in all scenarios. Either could be "juicier" depending on the individual situation.
But then I would add another factor, and that is risk. The risk that future tax rates will be higher, which will favour an ISA. And the fact that the pension money is a hostage to fortune, in that governments love to meddle with the captive money locked into pensions, whereas an ISA can be liquidated at any time tax-free.
I take your point on the hostage aspect, and personally I don't think a pension is really worth it for the 6.25% return you'll get if you're not dropping a tax level between employment and retirement.