by Asim Abbas
11 November 2026 
The SA108 capital gains pages explained
The SA108 capital gains pages explained
If you sold shares, crypto, a second home or another valuable asset in the 2025/26 tax year, you may need to complete the SA108 capital gains pages.
- You need the SA108 if gains are over £3,000 or proceeds over £50,000
- CGT rates are 18% and 24% for all assets
- Crypto has its own boxes on the form
- UK property sales still need a 60-day return as well
Capital Gains Tax rates changed in October 2024, the annual exempt amount is now just £3,000, and crypto has its own section on the form, so it pays to get this right.
This guide explains when you need the SA108, how gains are worked out and what to watch for.
When do you need the SA108?
- Your total chargeable gains were more than the £3,000 annual exempt amount
- Your total sale proceeds were more than £50,000, even if gains were lower
- You want to claim a capital loss to use later
- You sold UK residential property and already reported it in a 60-day return
Capital Gains Tax rates for 2025/26
| Taxable income band | Rate on gains |
|---|---|
| Within the basic rate band | 18% |
| Above the basic rate band | 24% |
| Business Asset Disposal Relief | 14% (18% from April 2026) |
Since 30 October 2024, the same rates apply to property, shares and other assets.
How a gain is worked out
Your gain is the sale price minus what you paid, less allowable costs such as legal fees, broker fees and Stamp Duty or Land Transaction Tax on purchase. Improvements to property count too, but repairs don’t.
You sell shares for £30,000 that cost £18,000, with £200 of fees. Your gain is £11,800. After the £3,000 exemption, £8,800 is taxable. If your income uses all but £5,000 of the basic rate band, £5,000 is taxed at 18% and £3,800 at 24%, so CGT is £1,812.
Capital Gains Tax calculator
Estimate CGT at 18% and 24%.
What goes on the form
Residential property
Sales of UK homes that weren’t your main residence. Private Residence Relief usually exempts your own home.
Listed shares and securities
Shares on a stock exchange, funds and similar investments. Same-day and 30-day matching rules apply before the Section 104 pool.
Cryptoassets
HMRC added separate crypto boxes from 2024/25. Swapping one token for another, spending crypto and selling it are all disposals. Our crypto tax returns service handles the pooling rules.
Other property and assets
Unlisted shares, land, business assets and valuable items such as art or antiques worth over £6,000.
Fixed-fee accountancy support
Transparent monthly packages for sole traders, landlords and limited companies. Fixed fees agreed upfront, VAT included.
Get a fixed-fee quoteCall 0161 531 4179The 60-day property rule
If you sell UK residential property and owe tax, you must report and pay within 60 days of completion, using HMRC’s property account. You then include it on your SA108 too. Late 60-day returns attract penalties. See GOV.UK.
Using losses
Losses must be claimed within four years of the end of the tax year. They’re set against gains in the same year first, then carried forward. Our Capital Gains Tax team can check you’ve claimed them all.
What should I do next?
Sales, swaps and gifts of assets in 2025/26.
Purchase price, fees and improvements.
Private residence, BADR and losses.
Our CGT service prepares the SA108 for you.
Frequently Asked Questions
What is the CGT annual exempt amount for 2025/26?
£3,000. Gains above that are taxable at 18% or 24%, depending on your income.
Do I need to report if I made no gain?
Yes, if your total sale proceeds were over £50,000, or if you want to claim a loss.
Is gifting an asset a disposal?
Usually yes. A gift is treated as a sale at market value, except gifts between spouses or civil partners.
Do I pay CGT on selling my home?
Not usually. Private Residence Relief covers your main home for the time you lived there.
Can Wingate calculate my gains?
Yes, including shares, crypto and property, with fixed fees agreed upfront.
Need help with this? Wingate Accountants offers fixed-fee online accountancy support across the UK. Call 0161 531 4179 or request a quote at wingateaccountants.co.uk.
About the Author
Asim Abbas
I’m Asim Abbas, founder of Wingate Accountants and a Chartered Certified Accountant. I help sole traders, landlords and directors stay on top of their tax with fixed fees and plain-English advice.
