It’s become fashionable to rate ISAs ahead of SIPPs as the best place for your retirement savings. Many investors even talk about abandoning personal pensions altogether if that sinister man in 11 Downing Street messes with them one more time.

While this might make for fine, contrarian pub talk – and if you find the pub where they banter about personal finance all night long then please point me to it – in my opinion the vast majority of people are better off storing their retirement funds in a proper pension scheme.1

Tax relief

ISAs and personal pensions both shelter assets from tax on interest, dividends and capital gains – so far, so equal.

But pensions have the edge where tax relief meets tax bands (bear with me).

With ISAs:

  • Savings put into ISAs have already lost a slice to income tax.
  • Withdrawals from ISAs are not taxed.

So you are taxed on the way in to an ISA but not on the way out.

With pensions:

  • Savings into pensions are not taxed.2 (Income tax relief on pension contributions neutralises the tax chomp.)
  • Withdrawals from pensions are taxed at standard rates of income tax.3

Pensions are therefore taxed on the way out but not on the way in.

If you paid 20% tax on all your income then it wouldn’t make any difference whether you put your money into an ISA or a pension – they would both receive the same tax holiday.

But part of your income is likely to fall into lower rates of income tax when you retire, in contrast to your earnings when employed.

In other words, a 40% tax-payer can earn 40% tax relief on pension contributions now but may only be taxed at 20% or even 0% when they retire.

That’s an outright gain of 20 – 40%.

Bear in mind that the personal allowance protects the first £10,000 of your income (and £10,500 from April 2015) from income tax.

A 20% tax-payer is likely to earn 20% tax relief on pension contributions, but a fair wedge of their retirement income may well fall within the personal allowance 0% band.

That’s a 20% boost on their assets that is unmatched by ISAs.

You’ve already lost 20 – 45% income tax on your ISA contributions, before you get the money in there. The best that can happen is that you don’t lose any more when you pull it out again.

SIPP vs ISA income tax relief

To see how likely you are to benefit, consider that a retirement pot of £262,500 is needed just to earn an income of £10,500 given a withdrawal rate of 4%.

You’d need a pot of over £1 million to hit the 40% income bracket4 at the same withdrawal rate.

That’s a problem few investors will face.

Grow your dough

Choosing a pension over an ISA can make a large difference to the size of your retirement stash as illustrated by the following example.

Imagine Irene Isa pops £8,000 into her ISA every year while Sally Sipp drops the same amount into her personal pension.

So after tax relief at 20%, Sally Sipp puts away £10,000 annually.

Sally and Irene’s investments both grow at an annual compound rate of 4% over the next 20 years.

When the bell dings, Sally Sipp’s pot = £306,888

Meanwhile Irene ISA’s pot = £245,510

The difference is the 20% tax relief.

Now they come to draw money from their pension. If Sally’s entire SIPP income was taxed at 20% then it would be the same as Irene’s ISA income.

But Sally doesn’t suffer 20% tax on the entire amount…

Irene’s annual income is £9,820 assuming a withdrawal rate of 4%. She isn’t taxed on any of it as she’s withdrawing money from an ISA (and she’s under her personal allowance, too).

Sally’s gross income is £12,275. Her net income is £11,920 – after 20% tax on her take-home above the £10,500 personal allowance.

So Sally’s net income is 21% larger than Irene’s.

Now I haven’t factored in the State Pension into those calculations because Sally and Irene retired age 55. A State Pension will push you closer to a higher tax band, so if you aren’t planning on retiring until your late 60s then the advantage of pension schemes over ISAs is reduced, although not eliminated.

Also remember that the tax benefits are doubled if you’re part of a couple that maximises your personal allowances and pension schemes.

Then there’s the 25% tax-free lump sum.

The 25% lump sum

This is a straight ace from your pension scheme. You can withdraw 25% of the whole pot and pay no tax whatsoever on that sum when you reach the minimum pension age.

Again, you’ve just made a 20 – 45% gain on the lump sum above and beyond anything you can achieve with an ISA.

That’s not to be sniffed at.

What’s more, pension income recycling enables you to repeat the trick.

  • Withdraw money from your pension and squirrel it away into a new pension scheme. The tax relief on the new pension contribution instantly negates the tax incurred on the withdrawal.
  • You can then crack open the new pot at a later date and claw out another 25% of tax-free, lump sum honey.
  • If you’re still working then you can put the equivalent of your annual earnings into your new pension. If you’re fully retired then you can put in £2,880 every year, which is topped up to £3,600 by HMRC.

To be fair, you can recycle savings from an ISA into a pension, too, but the point is that it’s only pension schemes that offer the 25% tax-free lump sum.

Note, this doesn’t work if you exceed your lifetime allowance or you’re over 75 or if you try to recycle using your 25% tax-free windfall.

Death taxes

The tax shield surrounding your ISA instantly vaporises when you die.

That means your family will no longer benefit from tax-free income and capital gains on the ISA portion of your savings when you exit the stage.

Your ISA holdings also fall into your estate5 so 40% inheritance tax will be due on any part of your wealth over and above your allowance (usually £325,000) including your house and all other assets.

If your estate will pass entirely to your spouse or civil partner then there’s nothing to worry about but, if not, then ISAs aren’t much cop once you shuffle off.

The situation is less clear-cut for pensions and depends on the individual details of your scheme.

Most pensions aren’t liable for inheritance tax but will incur a 55% tax charge if you’re over 75 or you’ve made withdrawals already.

You can avoid this fate by using phased withdrawal or by ensuring your scheme provides a dependent’s pension.

Salary sacrifice

Most people are aware that they should stash enough into their workplace pension to get the company’s maximum match.

It’s a double-your-money game. For example, with some schemes you can put in, say, 5% of your salary to get another 5% from your company. To turn down this opportunity is to turn down free dosh.

What’s less well known is that you also avoid national insurance if your company scheme operates on a salary sacrifice basis.

National insurance is a hefty 12% loss for basic-rate taxpayers so tax relief is effectively 32% in a salary sacrifice scheme versus an ISA. Meanwhile, higher-rate payers take a 2% NI nip and so can earn tax relief of 42%.

You will save national insurance on any amount that you divert to a salary sacrifice scheme. You don’t have to stop once you’ve maxed out the company’s match.

Tie-breakers

We’re wandering into the weeds now but you can’t keep putting money into ISAs if you move abroad, unless you are a Crown employee.6

But you can keep up your pension contributions from overseas under a wider range of circumstances. The fiddly details are beyond the scope of this post.

Also, if you fall upon hard times, ISA assets will affect most mean-tested benefits whereas pre-retirement pensions will not.

Where ISAs win

Accessing your money whenever you damn well please is the inarguable advantage that ISAs have over SIPPs and other forms of pension scheme.

That makes an ISA ideal for all financial objectives short of retirement at the minimum pension age.

Extreme early retirement, mortgages, university fees, emergency funds and so on – I would definitely use an ISA to meet any of these goals.

But it’s a combination of SIPP (or stakeholder pension) and workplace pension all the way if you want to hit retirement at age 55 or beyond.

The long game

The very flexibility of an ISA is a risk in itself when saving for a long-term goal like retirement. Can you be sure you’ll resist dipping into your funds to relieve some emergency or overwhelming desire along the way?

The temptation is ever present and can set back your retirement by years.

The recent changes to pensions announced in the Budget will make your pension just as flexible as an ISA when you finally come to generate an income, though as much debated they will also increase some of the risks of foolish cash splashage by newly minted retirees.

Finally, some argue that ISAs are less prone to regulatory meddling than pensions. Historically that’s certainly been the case.

Even now, the current Government is consulting on pushing back the minimum age for private pensions from 55 to 57 by 2028. The plan would then be to peg the private pension age to the State Pension age so that there’s always a 10-year gap between the pair.

Labour, meanwhile, seems committed to abolishing 40% tax relief.

But to my mind neither development destroys the superiority of the personal pension over the ISA when it comes to drafting you towards retirement.

Mix and match your cash

Some like to hedge their bets by investing in ISAs and SIPPs.

A hybrid solution could be just the ticket if you want to retire before the minimum pension age. You could use ISA assets to cover you for a few years before switching to your pension.

But before you decide, work out your financial plan and calculate when you’re likely to retire. If that date is beyond the minimum pension age then you will probably be better off with a pension scheme.

Take it steady,

The Accumulator

  1. I’m assuming you don’t have access to a defined benefit pension scheme and that you’ll make use of the best defined contribution scheme for your purposes e.g. SIPP, stakeholder pension or work-based pension.
  2. Assuming you stick within your annual allowance of £40,000 and lifetime allowance of £1.25 million.
  3. Not including your 25% lump sum – we’ll come back to that.
  4. £42,285 from April 2015.
  5. The exception is shares in firms listed on the Alternative Investment Market (AIM) that you’ve held for two years or more.
  6. Or spouse / civil partner of a Crown employee.

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