Comparison · Allowance Planning · 2026
Pension Carry Forward vs Bed and ISA UK 2026: Which Allowance to Use First?
As the tax year end approaches, investors with spare cash often face a choice: top up a pension using unused annual allowance through carry forward, or move existing taxable investments into an ISA through bed and ISA. Both shelter money from tax, but in different ways and using different allowances. This guide compares them with 2026/27 figures and shows how to decide which to prioritise.
TL;DR -- 30-Second Summary
- • Pension carry forward: use unused annual allowance from the last 3 years on top of GBP 60,000
- • Bed and ISA: move taxable investments into a GBP 20,000 ISA, using the GBP 3,000 CGT exemption
- • Different allowances: you can do both in the same tax year
- • Use it or lose it: carry forward expires after 3 years; the ISA allowance resets every 5 April
- • Relief: pension gives upfront relief, ISA gives tax-free growth and access
Side-by-Side Comparison
| Feature | Pension Carry Forward | Bed and ISA |
|---|---|---|
| Allowance used | Annual allowance (GBP 60,000 + unused) | ISA limit (GBP 20,000) |
| Upfront tax relief | Yes, at marginal rate | No |
| Tax on withdrawal | Taxable (25% lump sum tax-free) | Tax-free |
| Access age | Normal minimum pension age | Any time |
| CGT on setting up | None on cash contribution | Possible gain on the sale |
| Deadline pressure | High -- oldest year expires after 3 years | Medium -- allowance resets each year |
How Pension Carry Forward Works
The standard pension annual allowance for 2026/27 is GBP 60,000. If you did not use your full allowance in any of the previous three tax years, you can carry the unused amount forward and add it to the current year. In principle this could allow a contribution of up to GBP 240,000 with tax relief, although in practice two limits usually bite first.
First, tax relief on personal contributions is capped at 100% of your relevant UK earnings in the tax year, so you cannot get relief on more than you earn. Second, high earners may have a tapered annual allowance, which reduces the GBP 60,000 figure. You must use the current year's allowance first, then bring forward the oldest available year before more recent ones.
The relief itself is valuable: basic-rate relief of 20% is added to the contribution automatically, and higher and additional rate taxpayers claim further relief through self assessment. The trade-off is that the money is locked away until at least the normal minimum pension age, and pension income is taxable when drawn apart from the 25% tax-free lump sum.
How Bed and ISA Works
Bed and ISA is for investments you already hold outside any wrapper, in a general investment account. You sell them, then immediately repurchase the same or similar investments inside a stocks and shares ISA. The point is to bring those holdings into the tax-free ISA wrapper so that future growth and dividends escape capital gains tax and dividend tax.
The sale is a disposal for CGT, so any gain above the GBP 3,000 annual exempt amount for 2026/27 is taxable at 18% or 24%. Many investors deliberately bed and ISA an amount where the gain stays within the exemption, spreading the move across several tax years to avoid a CGT bill. Each year you can shelter up to GBP 20,000 of investments inside the ISA.
There is no upfront income tax relief, unlike a pension, but the money remains accessible at any age and all future returns are tax-free. This makes bed and ISA attractive for investors who want flexibility as well as tax efficiency.
Worked Example: GBP 25,000 of Spare Cash
A higher-rate taxpayer has GBP 25,000 of spare cash and a portfolio of GBP 30,000 in a general investment account with a GBP 2,500 unrealised gain. They want to be tax-efficient before 5 April.
| Action | Amount | Tax effect |
|---|---|---|
| Pension contribution (carry forward) | GBP 20,000 net | 20% added at source; higher-rate relief claimed |
| Bed and ISA the GIA holdings | GBP 20,000 of investments | GBP 2,500 gain within GBP 3,000 exemption: no CGT |
Here the GBP 2,500 gain sits within the GBP 3,000 annual exempt amount, so bed and ISA costs no CGT. The remaining cash goes into the pension using carry forward to mop up unused allowance from earlier years. Because the two use separate allowances, the investor does both rather than choosing one.
When Carry Forward Wins, When Bed and ISA Wins
Pension carry forward wins when:
- You are a higher or additional rate taxpayer wanting upfront relief
- You have unused allowance from earlier years about to expire
- You do not need access to the money before pension age
- You have the relevant UK earnings to support the contribution
Bed and ISA wins when:
- You hold investments outside a tax wrapper exposed to future CGT and dividend tax
- You want tax-free access at any age
- Your current gains fit within the GBP 3,000 annual exempt amount
- You have already maximised pension contributions or want flexibility