Bed and ISA 2026/27: Using the GBP 3,000 CGT Annual Exempt Amount to Shelter Gains

Bed and ISA is a tax-planning strategy that allows UK investors to convert taxable investments into tax-free ISA holdings while using the annual capital gains tax exemption. For investors with unrealised gains and available ISA allowance, this strategy can save hundreds of pounds annually. Unlike the US "wash-sale" rule, the UK permits immediate repurchase in different accounts.

Capital Gains Tax: How It Works in 2026/27

Before understanding Bed and ISA, you need to understand capital gains tax (CGT).

CGT rates (2026/27):

• Basic-rate taxpayers: 18% (on gains above annual exempt amount)
• Higher-rate taxpayers: 24% (on gains above annual exempt amount)
• Special rate for residential property: Discussed separately

Annual Exempt Amount (AEA): GBP 3,000

The AEA is the amount of capital gains you can realise annually without paying CGT. Once you exceed GBP 3,000 of gains, tax applies to the excess.

Example: Basic-rate taxpayer

You sell shares with a GBP 10,000 gain:

• AEA: GBP 3,000 (tax-free)
• Gain above AEA: GBP 10,000 -- GBP 3,000 = GBP 7,000
• CGT at 18%: GBP 7,000 × 18% = GBP 1,260
• Net proceeds after CGT: GBP 8,740

Without the AEA, you'd pay GBP 1,800 tax (18% on full GBP 10,000). The AEA saves GBP 540 in this scenario.

Example: Higher-rate taxpayer

Same GBP 10,000 gain:

• AEA: GBP 3,000 (tax-free)
• Gain above AEA: GBP 7,000
• CGT at 24%: GBP 7,000 × 24% = GBP 1,680
• Net proceeds after CGT: GBP 8,320

The AEA saves GBP 720 (24% × GBP 3,000).

What is Bed and ISA?

Bed and ISA (also called "Bed and Breakfast ISA" or "Swap and ISA") is a three-step strategy:

1. Sell shares in your General Investment Account (GIA) to realise gains up to the GBP 3,000 AEA
2. ISA allowance becomes available immediately after the sale
3. Rebuy the same shares in your Stocks & Shares ISA with the proceeds

Key advantage: The shares are now ISA-wrapped. Future growth and dividends are 100% tax-free.

Example:

You own GBP 15,000 of VANGUARD equity index fund in a GIA. Accumulated gain: GBP 5,000 (cost GBP 10,000).

Step 1: Sell the GBP 15,000 in GIA

• Realise gain: GBP 5,000
• AEA covers: GBP 3,000
• CGT on excess: (GBP 5,000 -- GBP 3,000) × 24% = GBP 480
• Proceeds: GBP 14,520 (net after CGT)

Step 2: ISA allowance refreshed

• Annual ISA limit: GBP 20,000
• If you have remaining allowance: GBP 20,000 available

Step 3: Rebuy in Stocks & Shares ISA

• Invest GBP 14,520 in identical VANGUARD fund in ISA
• Same fund now ISA-wrapped
• Future growth/dividends: 100% tax-free

Result: You've locked in the first GBP 3,000 of gains tax-free, and the remaining holding is now in a tax-sheltered ISA. Future growth (from GBP 14,520 onwards) is completely protected from CGT.

Why Bed and ISA Works: No Wash-Sale Rule

Unlike the US "wash-sale" rule (which prevents buying the same security within 30 days of a loss-creating sale), the UK has no wash-sale rules for CGT.

In the US: You cannot sell at a loss and repurchase the same security within 30 days.

In the UK: You can sell at a gain and immediately rebuy in a different account (GIA to ISA) with no penalty. The sale and purchase are not linked for tax purposes.

This is the fundamental reason Bed and ISA works. You:

• Realise the gain (lock in the AEA benefit)
• Rebuy immediately (maintain investment position)
• Shelter future growth (in ISA wrapper)

The 30-day gap is not required; you can rebuy the same day if you wish.

Step-by-Step: How to Execute Bed and ISA

Step 1: Identify unrealised gains in GIA

Review your General Investment Account holdings:

• Which holdings have significant gains?
• Which have you held for 12+ months (allowing AEA relief)?

Step 2: Calculate the gain you can realise tax-free

AEA 2026/27: GBP 3,000

Check your year-to-date gains. If you've already realised gains in the tax year, your remaining AEA is lower.

Example: You've realised GBP 1,500 of gains already in April-May 2026.

• Total AEA: GBP 3,000
• Used: GBP 1,500
• Remaining AEA: GBP 1,500

You can realise another GBP 1,500 of gains tax-free, then pay 24% on anything above that.

Step 3: Choose holdings to sell

Sell shares in your GIA that have:

• Unrealised gains (to utilise AEA)
• Sufficient gains to make execution worthwhile (covering broker fees)
• Investments you want to keep long-term (rebuy in ISA)

Avoid selling:

• Shares with losses (losses don't use AEA; save them for loss-carry-forward)
• Shares you want to dispose of entirely
• Volatile holdings (if you're uncertain about rebuy)

Step 4: Execute the sale

Sell the chosen shares in your GIA via your broker.

Costs:

• Broker fee: GBP 10-30 per sale (flat) or 0.1-0.5% (percentage)
• Bid-ask spread: Typically 0.1-0.5% for liquid shares

Example cost: Selling GBP 15,000 VANGUARD shares

• Broker fee: GBP 20
• Bid-ask spread: GBP 75 (0.5%)
• Total cost: GBP 95

Net proceeds: GBP 15,000 -- GBP 95 = GBP 14,905

Step 5: Rebuy in ISA

Open a Stocks & Shares ISA (if not already held) or use your existing ISA account with your broker.

Rebuy the identical shares (or very similar funds if the exact holding is unavailable).

Costs:

• Broker fee: GBP 10-30 (same broker)
• Bid-ask spread: GBP 75 (same)
• Total cost: GBP 95

Amount invested in ISA: GBP 14,905 -- GBP 95 = GBP 14,810

Tax benefit realised:

• CGT saved: GBP 480 (calculated above)
• Net cost of strategy: GBP 190 (two broker fees + spreads)
• Net tax saving: GBP 290 annually (GBP 480 saved -- GBP 190 costs)

Annual Opportunity: Repeatable Each Tax Year

Bed and ISA is not a one-time strategy. You can execute it every tax year as long as you have:

1. Unrealised gains in a GIA
2. Available ISA allowance

Multi-year execution:

Year 1 (2026/27):

• Sell GBP 15,000 with GBP 5,000 gain (realise GBP 3,000 gain tax-free)
• Save GBP 480-720 CGT
• Rebuy in ISA
• Remaining ISA allowance: GBP 5,000 (if GBP 20,000 total)

Year 2 (2027/28):

• Fresh AEA: GBP 3,000 (resets each tax year)
• Sell another GBP 15,000 with gain
• Realise another GBP 3,000 gain tax-free
• Save another GBP 480-720 CGT
• Rebuy in ISA

Over 10 years:

• Total CGT saved: GBP 4,800-7,200
• Costs of strategy: GBP 1,900 (GBP 190 × 10 years)
• Net tax saving: GBP 2,900-5,300

Limitations of Bed and ISA

ISA allowance cap: GBP 20,000 per tax year.

If you want to convert holdings worth GBP 50,000 into ISA protection, you can only rebuy GBP 20,000 in the ISA. The remaining GBP 30,000 must stay in the GIA.

Solution: Bed and ISA year-over-year. Rebuy GBP 20,000 in year 1, GBP 20,000 in year 2, etc.

Broker restrictions: Some platform brokers (e.g., simple robo-advisers) don't allow easy transfer between GIA and ISA within the same platform. Check before selecting a broker.

Settlement delays: From sell execution to ISA rebuy, your money may be in cash limbo (1-3 days). You're missing potential market upside during this period.

Market movement: If the share price rises between sale and rebuy, your rebuy cost is higher.

Example: VANGUARD shares at GBP 25 when you sell; GBP 25.50 when you rebuy.

• Intended rebuy amount: GBP 14,810
• Number of shares affordable: 582 (down from 592)
• You've bought fewer shares due to price movement

To mitigate, use limit orders to rebuy at your target price rather than market orders.

Bed and ISA vs Loss Harvesting

Loss harvesting is the opposite strategy: selling shares at a loss to realise CGT losses that offset other gains or carry forward.

When to use which:

• Bed and ISA: You have unrealised gains you want to shelter; you're happy with the investment (want to keep it)
• Loss harvesting: You have unrealised losses; you want to lock in losses to offset gains

You can combine both strategies:

1. Realise gains up to GBP 3,000 AEA via Bed and ISA
2. Realise losses in other holdings to offset gains above the AEA
3. Rebuy loss-harvested shares (with no wash-sale penalty)

Spousal Coordination: Double Your AEA Benefit

Each spouse has a separate AEA (GBP 3,000 each). If you're married/in a civil partnership, each partner can execute Bed and ISA independently.

Example: Married couple

Husband has GBP 20,000 of shares with GBP 8,000 unrealised gain:

• Sell GBP 20,000 in husband's GIA
• Realise GBP 8,000 gain
• Pay CGT on (GBP 8,000 -- GBP 3,000) = GBP 5,000 at 24% = GBP 1,200
• Rebuy GBP 19,800 in husband's ISA (net of costs)

Wife has GBP 15,000 of shares with GBP 6,000 unrealised gain:

• Sell GBP 15,000 in wife's GIA
• Realise GBP 6,000 gain
• Pay CGT on (GBP 6,000 -- GBP 3,000) = GBP 3,000 at 24% = GBP 720
• Rebuy GBP 14,700 in wife's ISA

Combined tax saving: GBP 1,200 + GBP 720 = GBP 1,920 (using two AEAs)

If they'd executed a single joint strategy, they'd only use one GBP 3,000 AEA and pay more tax.

Timing: When to Execute Bed and ISA

Early in the tax year (April-August):

• Maximise time for new ISA holdings to grow tax-free
• If markets rise, benefit from growth in ISA until March year-end

Late in the tax year (January-March):

• Review year-to-date gains before AEA resets
• Execute final Bed and ISA to "clear the decks" before new AEA

Not immediately after major gains: Wait until you're reasonably certain you won't realise larger gains later in the tax year. Once you use your GBP 3,000 AEA, subsequent gains are taxed at 18-24%.

Worked Example: GBP 10,000 Unrealised Gain

You have GBP 25,000 in VANGUARD Global Stock Index Fund (GBP 15,000 cost, GBP 10,000 gain).

Plan: Execute Bed and ISA to shelter the gain

Step 1: Sell in GIA

• Sell price: GBP 25,000
• Gain realised: GBP 10,000
• AEA: GBP 3,000
• Taxable gain: GBP 7,000
• CGT at 24%: GBP 1,680
• Proceeds net of tax: GBP 23,320
• Broker costs (GBP 95): GBP 23,225

Step 2: Rebuy in ISA

• Investment amount: GBP 23,225
• Broker costs (GBP 95): GBP 23,130 invested in ISA

Result:

• CGT paid: GBP 1,680
• Strategy cost: GBP 190 (brokers)
• Net cost: GBP 1,870

If you had not executed Bed and ISA and held the same shares in GIA for another year, earning 5% growth:

• New value: GBP 26,250
• New gain: GBP 11,250 (cost GBP 15,000)
• AEA used: GBP 3,000 (future year)
• CGT in future year: (GBP 11,250 -- GBP 3,000) × 24% = GBP 1,980
• But that's next year's problem

By executing Bed and ISA now:

• You've locked in GBP 3,000 AEA benefit (saves GBP 720)
• Future growth (GBP 23,130 onwards) is ISA-protected
• Next year's growth: 100% tax-free

Conclusion

Bed and ISA is a straightforward tax-planning strategy that allows investors to utilise their annual CGT exemption while converting taxable holdings into tax-free ISAs. With GBP 3,000 AEA and 24% CGT for higher-rate taxpayers, each execution saves GBP 720 in immediate tax. The absence of UK wash-sale rules makes this legal and powerful. For investors with unrealised gains and available ISA allowance, Bed and ISA deserves serious consideration each tax year.