Understanding SA108: Capital Gains Pages Made Simple
Hey there! If you’re doing a Self Assessment tax return, you might come across something called SA108. It can sound a bit confusing at first, but don’t worry – we’ll break it down in simple terms so you know when you need it and how it works.
What is SA108?
SA108 is a special part of your Self Assessment tax return that you use to report capital gains. A capital gain is the profit you make when you sell or dispose of certain things for more than you paid for them.
You might need SA108 if you’ve made gains from selling things like:
- Property that isn’t your main home (for example, a rental property or second home)
- Shares and investments
- Certain valuable items (like art, jewellery or collectibles)
- Other assets, such as some types of cryptoassets
What is Capital Gains Tax (CGT)?
When you sell an asset and make a profit, that profit may be taxed – this is called Capital Gains Tax (CGT). The good news is you usually have a tax-free allowance each year. You only pay CGT on gains above that allowance.
When Do You Need to Use SA108?
You will generally need to fill in SA108 if:
- You sold an asset for more than you bought it and made a profit.
- Your total gains for the year are above the CGT tax-free allowance.
- You need to report losses so you can use them against current or future gains.
- HMRC has specifically asked you to complete the capital gains pages.
How to Work Out a Capital Gain
Your capital gain is usually:
Sale price – Purchase price – Allowable costs = Capital gain
Allowable costs can include things like buying costs (legal fees, stamp duty) and selling costs (estate agent fees).
Example of a Capital Gain Calculation
| Item Sold | Purchase Price | Sale Price | Capital Gain |
|---|---|---|---|
| Shares in a company | £200 | £500 | £300 |
| Collectible item | £50 | £100 | £50 |
| Total | £350 |
How to Fill Out SA108
Filling in SA108 may look a bit daunting, but if you take it step by step, it’s manageable:
- Gather your information: Collect details for each asset you sold – dates, purchase price, sale price, and any costs (like legal fees or broker fees).
- Calculate your gains and losses: For each asset, work out the gain (or loss) using the simple formula above.
- Enter each disposal on the form: Put the figures in the correct sections (e.g. residential property, listed shares, other assets).
- Include any losses: Record losses too – they can be used to reduce the amount of CGT you pay.
- Total it up: Add up all your gains and losses so HMRC can work out if any CGT is due.
Quick Tips & Reminders
| Reminder | Details |
|---|---|
| Deadline | Online tax returns are usually due by 31 January following the end of the tax year. |
| Keep Records | Keep copies of contracts, statements and invoices showing what you paid, what you sold for, and any costs. |
| Use Your Allowance | Remember there is a tax-free CGT allowance each year – you only pay tax on gains above that amount. |
Wrapping It Up
SA108 is simply the part of your tax return where you tell HMRC about profits you’ve made from selling assets. Once you break it down into steps – gather details, calculate gains, and enter the figures – it becomes much easier to handle.
If you’re ever unsure whether a sale needs to go on SA108 or how to calculate a gain, it’s a good idea to speak to a tax specialist or use a trusted service like Tax Online to help you get it right and avoid paying more tax than you need to.
