How can I legally avoid capital gains tax UK?

You can legally reduce or avoid CGT by using your £3,000 annual allowance, transferring assets to your spouse, holding investments in ISAs or pensions, offsetting losses, timing sales across tax years, and making pension contributions to extend your basic rate band. All these strategies are legitimate tax planning, not avoidance.

Can I transfer assets to my spouse to avoid CGT?

Yes, transferring assets to a spouse or civil partner is CGT-free. This allows you to use both partners' £3,000 annual allowances (£6,000 total), potentially keep the gain in a lower tax bracket, and share ownership before selling. The receiving spouse takes your original cost base for future CGT calculations.

How do I offset losses against capital gains?

You can offset capital losses against gains in the same tax year first. Any unused losses can be carried forward indefinitely but can only reduce gains to the annual allowance level (£3,000). You can crystallize losses by selling assets, even buying them back after 30+ days (bed and breakfasting rules apply).

Does putting investments in an ISA avoid CGT?

Yes, any gains made within an ISA are completely free from CGT. This is why maximizing your ISA allowance is crucial for tax-efficient investing. You can also do 'Bed and ISA' — selling taxable investments, using your annual allowance, and rebuying within an ISA to shelter future gains.

How to Reduce Capital Gains Tax UK — Legal Ways to Cut Your CGT Bill | PocketWise

How to Reduce Capital Gains Tax UK — Legal Ways to Cut Your CGT Bill

Legitimate strategies to reduce or avoid capital gains tax in the UK. Use allowances, spouse transfers, ISAs, pensions, loss harvesting, and timing strategies to minimize CGT legally.

By PocketWise · 14 April 2026 · 6 min read

Capital gains tax rates of 18% and 24% can take a big chunk of your profits. Here are legitimate ways to reduce your CGT bill.

Strategy 1: Use Your Annual Allowance

The Basics

Tax Year	CGT-Free Allowance
2026-27	£3,000
Per person	Cannot be transferred
Use it or lose it	Doesn’t carry forward

How to Maximize It

Approach	Benefit
Sell gain of £3,000 each year	CGT-free
Time sales around 5/6 April	Use two years’ allowances
Couples: both sell own assets	£6,000 combined

Example: Splitting Sale Over Two Tax Years

Scenario	Single Year	Split Over Two Years
Total gain	£10,000	£5,000 + £5,000
Allowance used	£3,000	£3,000 + £3,000
Taxable	£7,000	£2,000 + £2,000
CGT at 18%	£1,260	£720
Saving		£540

Strategy 2: Transfer to Spouse/Civil Partner

The Rules

Rule	Detail
Transfers between spouses	No CGT
Receiving spouse’s base cost	Your original cost
When they sell	CGT based on original cost
Not available	Unmarried partners

Why It Helps

Benefit	Explanation
Double the allowance	£3,000 each = £6,000
Lower rate spouse	May pay 18% instead of 24%
Split ownership	Reduces each person’s gain

Example: Spouse Transfer

Before transfer (one spouse owns):

Detail	Amount
Total gain	£20,000
Allowance	£3,000
Taxable	£17,000
Higher rate spouse CGT	£4,080

After 50% transfer (both own):

Detail	Each Spouse
Gain (50% each)	£10,000
Allowance	£3,000
Taxable	£7,000
CGT at 18%/24%	Varies
Combined saving	Up to £1,200+

How to Transfer

Step	Action
1	Sign a deed of transfer
2	For shares: contact broker
3	For property: Land Registry form
4	Keep records

Strategy 3: Use ISAs and Pensions

Shelter Future Gains in ISAs

Action	Result
Invest within ISA	All gains tax-free
Max £20,000/year	Building tax-free pot
Dividends too	No dividend tax

Bed and ISA

Step	Process
1	Sell investments outside ISA
2	Use annual allowance against any gain
3	Buy same investments within ISA
4	Future gains now tax-free

Example: Bed and ISA

Scenario	Outside ISA	After Bed and ISA
Holding value	£30,000	£30,000
Original cost	£20,000	£30,000 (new base)
Unrealized gain	£10,000	£0
Gain used allowance	£3,000	N/A
Tax paid	£1,260 (one-off)	£0
Future gains	Taxable	Tax-free

Using Pensions

Action	Effect
Contribute to pension	Extends basic rate band
More gain at 18%	Instead of 24%
Plus tax relief	On the contribution

Example: Pension Contribution to Reduce CGT Rate

Without Pension	With £10,000 Pension
Income: £50,270	Income: £50,270
Basic rate band: £37,700	Extends by £10,000
Gain taxed at 24%	£10,000 of gain at 18%
CGT on £15,000: £3,600	CGT: £2,700
Saving	£900

Strategy 4: Offset Losses

How Capital Losses Work

Rule	Detail
Same-year losses	Must be offset fully
Brought-forward losses	Only to reduce to allowance
Register losses	Within 4 years
Carry forward	Indefinitely

Loss Harvesting

Step	Action
1	Identify investments showing losses
2	Sell to crystallize the loss
3	Use loss against gains
4	Can rebuy after 30+ days

Example: Using Losses

Scenario	Without Loss	With Loss Offset
Gain from sale	£15,000	£15,000
Loss from other sale	N/A	£8,000
Net gain	£15,000	£7,000
After allowance	£12,000	£4,000
CGT at 18%	£2,160	£720
Saving		£1,440

Bed and Breakfasting Rules

Rule	Detail
Same asset, same person	30-day rule
Sell and buy within 30 days	Matched (no loss)
Solution 1	Wait 31+ days before rebuying
Solution 2	Spouse buys immediately
Solution 3	Buy in ISA instead

Strategy 5: Timing Your Sales

End of Tax Year Strategy

Timing	Effect
Sell before 5 April	Uses this year’s allowance
Sell after 6 April	Uses next year’s allowance
Split across both	Two allowances

Market Timing Considerations

Factor	Consideration
Share price falling	May be loss to harvest
Share price rising	Lock in gain with allowance
Approaching year end	Review positions

Multi-Year Planning

Year	Action
Year 1	Sell £3,000 gain tax-free
Year 2	Sell £3,000 gain tax-free
Year 3	Continue pattern
Result	Gradual tax-free realization

Strategy 6: Gift to Charity

Charity Reliefs

Gift Type	CGT Status
Gift of assets to charity	No CGT
Sale and donate cash	CGT on sale, then Gift Aid
Shares to charity	No CGT + Income Tax relief

Comparing Options (Higher Rate Taxpayer)

Method	Shares Worth £10,000, Cost £5,000
Sell, keep cash	£5,000 gain, £1,200 CGT
Sell, donate cash	£1,200 CGT, then Gift Aid relief
Give shares directly	£0 CGT + Income Tax relief on £10,000

Giving shares directly: No CGT plus Income Tax relief at your rate.

Strategy 7: Reinvestment Reliefs

Business Asset Disposal Relief (BADR)

Criteria	Requirement
Qualifying asset	Trading business or shares
Ownership	2+ years
Rate	14% (2025) / 18% (2026 onwards)
Lifetime limit	£1 million

Enterprise Investment Scheme (EIS) Deferral

Action	Effect
Sell asset with gain	Gain arises
Invest in EIS company	Defer the gain
Limitation	EIS investment rules apply

Rollover Relief

Scenario	Effect
Sell business asset	Gain arises
Buy replacement asset	Within 1 year before to 3 years after
Result	Gain deferred into new asset

Strategy 8: Property-Specific Strategies

Main Residence Nomination

Scenario	Action
Own two homes	Nominate one as main
Switch nomination	Can change
Deadline	2 years from acquiring second
Final period exemption	Last 9 months always exempt

Example: Nomination Strategy

Without Nomination	With Strategic Nomination
Second home gains taxable	Nominate second home briefly
	Gain some PPR relief
	Return to first home nomination

Renting a Room

If you let part of main home
Rent-a-room relief	Up to £7,500 tax-free
Lettings relief	Limited since 2020
PRR still applies	For your portion

Strategy 9: Death Planning

CGT on Death

Event	CGT Status
Death	No CGT (assets uplifted to MV)
Beneficiary receives	At market value
Future gains	From new base cost

Estate Planning

Strategy	Effect
Hold highly appreciated assets	Uplift on death
Gift assets with gains	Triggers CGT now
Consider order of disposal	Lifetime vs inheritance

Example: Holding vs Selling

Sell Before Death	Hold Until Death
Gain: £100,000	Gain: £100,000
CGT: £23,280	CGT: £0
Estate value: £176,720	Estate value: £200,000

But: IHT may apply to the estate — need to balance.

Strategy 10: Business Reliefs

Investors’ Relief

Criteria	Requirement
Shares	Unlisted trading company
Ownership	3+ years
Rate	10%
Lifetime limit	£10 million

Scheme	CGT Benefit
EMI options	May qualify for BADR at 10%
SAYE	Gains from discount are income
SIP	Held 5+ years = CGT-free

Planning Checklist

Before Any Disposal

Check	Action
Current year gains	Running total
Losses available	Same year and brought forward
Spouse position	Can they sell instead?
ISA allowance	Room for bed and ISA?
Timing	Near year end?

Annual Review

When	Action
March	Review unrealized gains/losses
	Consider using allowance
	Check loss-making holdings
April	Fresh allowance — plan year

Reporting Requirements

Remember	Deadline
Property sales	60 days to report and pay
Other assets	Self Assessment
Losses	Register within 4 years

Summary: Quick Reference

Strategy	Tax Saving Potential
Use £3,000 allowance	Up to £720/year
Spouse transfer	Up to £720 extra
ISA/Pension shelter	Significant long-term
Loss offsetting	Variable
Timing across years	Up to £720 per year split
Charity gifts	18-24% of gain
BADR	10% instead of 24%
Death uplift	100% of gain