Bed and ISA Explained: Shelter Your Investments From Capital Gains Tax

The Bed and ISA strategy is one of the most effective — and entirely legal — ways to reduce your future tax on investments. By moving existing holdings into a tax-free ISA wrapper, every penny of future growth and income becomes permanently sheltered from tax. Yet many investors with substantial general investment accounts have never heard of it.

Here is how it works, when it makes sense, what it costs, and what to watch out for.

This is not financial or tax advice. Consult a qualified adviser before making investment or tax decisions.

How Bed and ISA Works

The strategy has three steps:

1. Sell shares, funds, or ETFs from your general investment account (GIA)
2. Buy the same (or equivalent) investments inside a Stocks and Shares ISA
3. The position is now sheltered from future CGT and dividend tax

Because you are selling from a GIA and buying back inside an ISA — two legally separate wrappers — HMRC’s 30-day matching rule does not apply. This is the key distinction that makes Bed and ISA work while a simple sell-rebuy in a GIA (old-fashioned “Bed and Breakfast”) does not.

Why Bed and ISA Matters in 2026/27

The case for Bed and ISA has grown significantly since the annual CGT exempt amount was reduced from £12,300 to £3,000:

With only £3,000 of gains exempt each year, investors with growing portfolios face material CGT exposure. Moving holdings into an ISA permanently eliminates future tax on those assets — not just defers it.

Example of the long-term benefit: You hold £50,000 of index funds in a GIA. Over 10 years they double to £100,000. Without action:

• Gain: £50,000
• After exempt amount: £47,000 taxable (as a basic rate taxpayer)
• CGT at 18%: £8,460

If you had moved all £50,000 into an ISA (using Bed and ISA over several years), the entire gain is tax-free — a saving of £8,460 to £11,280 depending on your tax rate.

The ISA Annual Allowance Limit

The major constraint is the ISA subscription limit: £20,000 per tax year per person. You cannot contribute more than this to ISAs in a single tax year — so a large GIA cannot be moved all at once.

For married couples: Each spouse has their own £20,000 ISA allowance. A couple can shelter £40,000 per year between them. For larger portfolios this halves the timeframe.

Using Your CGT Exempt Amount Efficiently

When you sell your GIA holdings to fund the ISA, you may trigger CGT. The goal is to crystallise gains up to — but not exceeding — your £3,000 annual exempt amount each year.

Worked example — gradual Bed and ISA:

By spreading the Bed and ISA over several years and being selective about which holdings to sell first, you can often minimise or eliminate CGT.

Prioritise Low-Gain Holdings First

Sell holdings with the smallest unrealised gain first. As your ISA grows, choose higher-gain assets for future years when you can afford to pay some CGT on the excess.

Costs of Bed and ISA

The strategy is not free. You should factor in:

For passive index fund investors, Bed and ISA is particularly cost-effective since dealing charges are relatively small compared to the long-term tax savings.

For individual share holders, dealing charges of £10–£20 per stock make it more expensive to move a diversified portfolio of 20+ stocks. Consider using a flat-fee broker or focusing on your largest positions first.

Bed and ISA vs Bed and SIPP

Both strategies move investments out of a GIA and into a tax-free wrapper. They have different characteristics:

The summary: Bed and SIPP offers higher tax relief upfront but locks the money away. Bed and ISA offers complete flexibility. Most investors benefit from both — use pension first for retirement savings, ISA for medium-term goals and flexibility.

What Happens to Dividends After Bed and ISA?

Once inside an ISA, dividends are completely tax-free — there is no dividend income to report and no tax to pay.

In a GIA, dividends are subject to income tax above the dividend allowance (£500 in 2026/27):

• Basic rate taxpayers: 8.75% on dividends above £500
• Higher rate: 33.75%
• Additional rate: 39.35%

For a portfolio generating £3,000+ annual dividends, the dividend tax saving alone can justify moving to an ISA.

Step-by-Step: Doing a Bed and ISA

1. Log into your general investment account and identify which holdings you want to shelter
2. Check the unrealised gain on each holding (most platforms show this)
3. Select holdings to sell — prioritise those with gains up to £3,000 this tax year
4. Place the sell order — note the proceeds and confirm the realized gain
5. Within the same or next working day, contribute the proceeds to your Stocks and Shares ISA (not exceeding your remaining annual ISA allowance)
6. Buy the same or equivalent funds inside the ISA
7. Keep a record — note the sale proceeds, acquisition cost, and gain for your CGT records or Self-Assessment

Many investment platforms offer a Bed and ISA in a near-automated workflow. Check if your provider supports it (Hargreaves Lansdown, AJ Bell, Vanguard, and Fidelity all offer this facility).

Common Mistakes to Avoid

Is Bed and ISA Right for You?

It is most valuable if:

• You have a GIA with significant unrealised gains (£10,000+)
• You are a higher or additional rate taxpayer (you save 24%, not just 18%)
• You plan to hold investments for many years — giving time for tax-free compounding to work
• You have unused ISA allowance each year

It is less valuable if:

• Your GIA holdings are mainly in loss
• You need the money soon (and will be selling anyway)
• Your portfolio generates minimal dividends and likely small gains

Related Guides

• Capital Gains Tax on Shares UK
• Capital Gains Tax Rates 2026/27
• How to Reduce Capital Gains Tax
• Stocks and Shares ISA Guide
• SIPP vs Workplace Pension
• Tax-Efficient Investing Guide