Bed and ISA Explained: Moving Investments Into Your ISA Tax-Efficiently

Bed and ISA is a two-step transaction. You sell holdings — usually shares, funds or ETFs — from a general investment account, and immediately buy back the same (or different) investments inside your Stocks and Shares ISA. The two trades are usually arranged by your platform as a single instruction, which is why it has its own name.

The point of doing this is not to change what you own. The point is to change where you own it. Anything held inside an ISA grows free of UK income tax and CGT, with no further reporting on your tax return. Anything held outside an ISA is potentially taxable on dividends, interest and capital gains.

The "bed" part of the name is historic — it refers to "bed and breakfasting", an older technique of selling and rebuying overnight that was banned in 1998. Bed and ISA is the legitimate modern equivalent, because moving an asset into an ISA is treated as a genuine disposal followed by a fresh acquisition inside a different tax wrapper.

The mechanics differ slightly between platforms, but the core steps are the same.

First, you choose how much you want to move. You can only contribute up to the annual ISA allowance — £20,000 for the 2026/27 tax year — across all ISA types in any given tax year.

Second, the platform sells the chosen investments from your GIA. This creates a CGT event: any gain made between the original purchase price and the sale price counts towards your annual exempt amount of £3,000.

Third, the proceeds are used to buy investments inside your ISA. Most platforms aim to buy back the same holdings on the same day, but small price movements between the sell and buy mean the figures rarely match perfectly.

Once complete, the new holdings sit inside your ISA. From that point on, dividends, interest and future capital growth on those investments are sheltered from UK tax — for as long as they remain inside the wrapper.

Three numbers shape any Bed and ISA decision:

The ISA annual allowance is £20,000 for 2026/27. This is the maximum you can pay into ISAs in total across the tax year — Stocks and Shares, cash, innovative finance and Lifetime ISA combined (the Lifetime ISA sub-limit is £4,000). You cannot exceed this even if you have unused allowance from previous years; ISA allowances do not carry forward.

The CGT annual exempt amount is £3,000 for 2026/27. This is the amount of capital gain you can realise tax-free each tax year. Anything above this is taxed at 18% if the gain falls within your basic-rate income band, or 24% if it falls in the higher or additional-rate band, for most assets including shares and funds.

The dividend allowance is £500 for 2026/27. Dividends above this are taxed at 10.75% (basic rate), 35.75% (higher rate) or 39.35% (additional rate) from April 2026. Moving income-producing holdings inside an ISA stops them counting against this allowance in future years.

Your CGT exempt amount and dividend allowance reset every 6 April and cannot be carried forward. That is one reason many investors plan Bed and ISA activity at the start of a tax year rather than waiting until March.

Bed and ISA may be appropriate where you have built up a meaningful position outside an ISA over time. Possible situations include:

• You have shares from an old employee scheme, an inheritance, or maturing share certificates sitting in a dealing account.
• You have a portfolio that now produces dividends above £500 a year, or interest you'd prefer not to declare.
• You're approaching retirement and want to simplify your annual tax position by gradually moving assets into wrappers that need no reporting.
• You want to use this year's ISA allowance but don't have spare cash to fund it — Bed and ISA lets you fund the ISA using investments you already hold.

A married couple or civil partners can use their allowances separately. Transfers of assets between spouses are generally made on a no-gain, no-loss basis, which means a partner with no remaining ISA allowance could in some cases transfer assets to the other to make use of theirs. Whether this is appropriate depends on your circumstances and may need advice.

Bed and ISA is not always the right answer. There are a few things to weigh up.

If your unrealised gains are large, even a modest position may breach your £3,000 CGT allowance — meaning some tax falls due even though you haven't really changed your investments. Spreading the activity across more than one tax year can help.

There is usually a short gap between the sell and buy trades. During that gap, the market can move. Most platforms close the loop on the same day, but the prices rarely match to the penny, so you may end up with a slightly different number of units after the buy-back.

You'll be out of the market briefly. For volatile holdings, that brief gap can matter. Some platforms quote a single "Bed and ISA price" that smooths this; check what yours does before deciding.

There may be dealing fees on both the sell and the buy, depending on platform. For fund-only investors these are often nil; for ETFs or shares, they can add up.

Finally, a Bed and ISA only helps if the wrapper choice is right in the first place. For higher-rate or additional-rate taxpayers with retirement still some years away, a pension contribution may be more tax-efficient than an ISA. The right route depends on your overall plan.