Locking £40,000 Away Until 57 to Dodge Today's Tax Is Betting Against a Government That Changes Pension Rules Every Budget

The standard case for salary sacrifice assumes today's rules persist. They won't. Look at the track record.

• 2006: Pensions simplification introduced a £1.5m lifetime allowance.
• 2011: Annual allowance slashed from £255,000 to £50,000.
• 2014: Lifetime allowance cut to £1.25m. Annual allowance to £40,000.
• 2015: Pension freedoms introduced — a genuinely positive reform, but an example of how much the rules move.
• 2016: Lifetime allowance down again to £1.0m. Tapered annual allowance introduced.
• 2023: Lifetime allowance abolished. Annual allowance up to £60,000.
• 2024: Tax-free lump sum re-capped at £268,275.
• 2024: Most pensions brought inside inheritance tax from April 2027 — a massive reversal of the 2015 tax-free-to-beneficiaries rule.

That's eight major reforms in 18 years. HMRC's pensions manual reflects the patchwork. Anyone who salary-sacrificed heavily in 2015 on the understanding that their pension would pass to heirs free of IHT has just been told the opposite applies from April 2027. The IHT reform was confirmed in the Autumn Budget 2024.

The question isn't whether pension rules will change again. They will. The question is whether they'll change in your favour, or against you, and you have no way of knowing.

Today's minimum pension access age is 55. From 6 April 2028 it rises to 57. The government confirmed the rise in 2021. The direction of travel is clear: as state pension age rises to 67 and 68, the minimum access age for private pensions will track roughly 10 years behind.

That means someone currently 35 could reasonably face an access age of 58 or 59 by the time they retire. Someone currently 25 might face 60. Every rise is announced seven years in advance, giving plenty of 'democratic notice' — but not enough to actually change plans already made.

A 40-year-old sacrificing £40,000 today isn't locking up money for 17 years. They're locking it up for 17–22 years, depending on how the rules drift. MoneyHelper's pension access guide tracks the current and announced rules.

Take £40,000 as cash. After 40% income tax and 2% NI, £23,200 lands in your bank. Put £20,000 into an ISA — the full 2026/27 allowance. The remaining £3,200 goes into a general investment account, where the first £3,000 of gains is CGT-free per year and dividend yields below £500 are covered by the dividend allowance. Two years of contribution, and you've sheltered the entire after-tax bonus inside ISA wrappers — and moving between providers without losing tax-free status is a form, not a rebuild.

That £20,000 is accessible from the day it's deposited. Not in 17 years, not in 22 — tomorrow. It's available for:

• A remortgage shortfall when your fix rolls off and the new rate is 5.5%+
• A redundancy that lasts longer than your three-month emergency fund
• A business opportunity, a divorce, a sick parent, a school fee demand
• A house move that needs bridge finance
• Any of the reasons a real life throws at real people in their 40s and 50s

The pension's 57% government top-up is worth something only if you make it to 57 with your life and income intact. For anyone under 50 with a mortgage, kids, and a volatile career, that's not a given.

The 42% relief on the way in gets most of the attention. The tax on the way out gets almost none. Here's the full picture.

Only 25% of the pension comes out tax-free (capped at £268,275). The other 75% is taxed at your marginal rate in retirement. If you retire with a decent pension plus rental income or part-time work pushing you into the higher-rate band, you're paying 40% back on 75% of the pot. HMRC's guide to taking pension money confirms the arithmetic.

Run the numbers on £40,000 sacrificed today and compounded at 5% for 17 years (£91,700 at 57):

• 25% tax-free lump sum: £22,900
• 75% taxable: £68,800
• Tax in retirement at basic rate (20%): £13,800 — net £55,000
• Tax in retirement at higher rate (40%): £27,500 — net £41,300

Total spendable: £77,900 (basic) or £64,200 (higher). Against £53,200 from the ISA route — which comes out with zero further tax, zero drawdown complexity, and zero risk of a future Chancellor taxing the 25% lump sum.

The gap narrows when you realise the ISA is flexible, tax-free for heirs under ISA-transfer rules for spouses, and immune to the post-2027 inheritance tax treatment of pensions.

From April 2027, most unused pension pots will be included in the estate for inheritance tax purposes. This is not a small tweak. It reverses the most valuable feature of the post-2015 pension regime: the ability to pass a pension to non-spousal heirs tax-free before age 75, or at the beneficiary's marginal rate after.

For a higher-rate earner in their 40s with children, this changes the lifetime expected return of a pension by as much as 40% of the unused pot. The 'sacrifice and let it compound' strategy implicitly assumed your heirs got what you didn't spend. That assumption is now worth considerably less.

An ISA, by contrast, passes to a spouse via the Additional Permitted Subscription rules with its tax-free wrapper intact. On non-spouse heirs it does face IHT, but so do pensions now. The ISA is no worse on death — and hugely better for everything before death.

Read our full breakdown on pension IHT changes for the detail.

This isn't a case against pensions in general. It's a case against over-optimising for a 42% relief figure that doesn't survive contact with reality. Three scenarios where salary sacrifice still wins:

• You're inside five years of accessing the pension. Rule-change risk is bounded and you'll know the drawdown tax environment before you retire.
• Your employer matches pension contributions. A 5% employer match is free money that no ISA can replicate. Take the match, then stop.
• You're in the 60% tax trap between £100,000 and £125,140. The personal allowance taper does create a genuinely extreme marginal rate. Sacrifice back below £100,000 and call it done — but beyond that, stop.

For everything else — for the 40-year-old higher-rate earner with a £40,000 bonus and 17 years to 57 — take the cash. Pay the tax. Fill the ISA. Keep the flexibility. The 'best deal in British finance' is a pitch, not a guarantee.

For the opposing view — the full case for sacrificing every pound — read our case for salary sacrifice.

This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment decisions. Past performance is not a reliable indicator of future results. Tax treatment depends on individual circumstances and may change in future.