The Wee Guide to Capital Gains Tax

Capital Gains Tax is one of those tax topics that starts off sounding simple and then, quite quickly, turns into a bin fire.

So this is the wee guide.

Not the giant guide.
Not the specialist guide.
Not the “let’s analyse your share reorganisation across three tax years” guide.

Just the wee one.

We are not specialists in Capital Gains Tax. We do sometimes have to include straightforward capital gains information on a tax return, but this guide only covers the very basics for freelancers, sole traders and small business owners across the UK. If things get complicated, expensive, inherited, romantic, international, trust-shaped, or crypto-shaped, that is usually where specialist advice comes in. HMRC’s own guidance covers CGT across property, shares, personal possessions and business assets, and also points to more specialist reliefs where things get technical.

What this guide is for

This guide is here to help with the sort of questions people usually ask first:

• what even is Capital Gains Tax?

• when does it come up?

• does it affect normal freelance income?

• what sort of things might need to go on a tax return?

• when should I stop Googling and speak to somebody who does this all day?

That is the lane.

We are staying in that lane.

What this guide is not

This is not specialist Capital Gains Tax advice.

It is not a deep dive into:

• business sales

• company shares with odd histories

• trusts

• deceased estates

• separation or divorce settlements

• overseas assets

• large property gains

• gift reliefs and hold-over claims

• complicated crypto calculations

• anything where the paperwork already looks haunted

If your situation falls into one of those categories, this guide is background reading, not a final answer. HMRC has separate guidance for things like gifts, Business Asset Disposal Relief, property, cryptoassets and shares because these areas can get technical very quickly.

So what is Capital Gains Tax?

Very basically, Capital Gains Tax is tax on the gain you make when you sell or otherwise dispose of something that has gone up in value.

Important bit: it is the gain, not the full sale price.

So if you bought something for £5,000 and later sold it for £8,000, the gain is £3,000.

Not £8,000.

HMRC treats “disposing of” an asset quite broadly. It can include:

• selling it

• giving it away

• swapping it

• transferring it

• or getting compensation for it if it is lost or destroyed

So yes, sometimes a “gift” is still a tax event. Because tax likes to keep things interesting.

The bit freelancers often get wrong

A lot of freelancers hear “Capital Gains Tax” and panic that it applies to all the money they make.

It does not.

Your normal freelance income is usually income tax territory, not Capital Gains Tax territory.

So things like:

• client work

• invoices

• retainers

• day rates

• project fees

are normally not capital gains.

They are just your trading income doing its usual annoying thing. HMRC treats CGT as something separate from your normal earnings, and CGT usually comes into play when you dispose of assets rather than when you get paid for your work.

When freelancers and small business owners do bump into it

This is where it tends to show up more often.

Common examples include:

• selling shares or investments

• selling cryptoassets

• selling a second property or buy-to-let

• selling business assets

• disposing of something valuable that has increased in value

• in some cases, transferring assets to other people

HMRC says you may need to pay CGT when you sell shares or other investments, when you sell or exchange cryptoassets, and when you sell property that is not fully covered by main-home relief.

When it usually does not apply

There are lots of situations where people worry about Capital Gains Tax and do not actually need to.

A few of the common ones:

• your ordinary freelance income

• assets held inside an ISA

• Premium Bonds

• most betting or lottery winnings

• selling your only or main home, if the normal Private Residence Relief conditions are met

HMRC says gains on ISAs, gilts, Premium Bonds and gambling winnings are generally outside CGT, and a sale of your only or main home is usually covered by Private Residence Relief if the normal conditions are met.

The very basic numbers

For individuals, the CGT annual exempt amount is currently £3,000.

That means if your total gains for the year, after losses and deductions, are within that amount, you may not have tax to pay.

The main CGT rates for individuals are now generally 18% and 24%, depending on your taxable income and how much of the basic rate band is available. HMRC changed the main rates for disposals on or after 30 October 2024, and those rates remain the main individual CGT rates going into 2026/27.

There are also special reliefs and exceptions.

For example, qualifying Business Asset Disposal Relief has its own rate, which rises to 18% from 6 April 2026. Which is exactly the kind of sentence that tells you this is where things stop being “wee guide” material and start becoming “please get proper advice” material.

How the basic calculation works

At its simplest, you are usually looking at:

• what you paid for the asset

• what you sold it for

• certain allowable buying and selling costs

• any allowable losses

• any reliefs that might apply

• and then whether any of the gain sits above your tax-free allowance

That is the broad idea.

In real life, the sentence “it was quite straightforward actually” is often said moments before discovering three missing purchase documents and an ancient spreadsheet called FINAL-FINAL-V2. HMRC’s reporting guidance says you need records of what you bought and sold the asset for, the dates involved, and relevant costs such as buying, selling or improvement costs.

Crypto: yes, this is often a CGT issue

This is worth saying plainly because the internet is still absolutely full of nonsense.

If you sell, exchange or give away cryptoassets, there may be a Capital Gains Tax position.

So this is not just about cashing out into pounds.

It can also apply when you swap one token for another.

That is usually the point where people realise their record-keeping system of “vibes and screenshots” was perhaps not ideal. HMRC’s crypto guidance says CGT can apply when you sell, exchange or give away cryptoasset tokens such as bitcoin, XRP or ether.

Property: this is where the wee guide starts sweating

If you sell a second property, a buy-to-let, or a property that is not fully covered by main-home relief, Capital Gains Tax may be in play.

And this is one of the areas where deadlines matter.

If you sell a UK residential property and CGT is due, HMRC says you normally need to report and pay it within 60 days of completion.

Not “eventually.”
Not “when you get round to it.”
Not “when life calms down a bit.”

Within 60 days.

If the property was your only or main home throughout ownership and the normal conditions for Private Residence Relief are met, there is usually no CGT to pay. But once there is letting, mixed use, partial business use, time living elsewhere, or multiple properties involved, things can get much less friendly.

Do gifts matter?

Annoyingly, yes, sometimes.

A lot of people assume Capital Gains Tax only matters when cash changes hands.

That is not always true.

HMRC has special rules for gifts. Gifts to a spouse, civil partner or charity are often treated more favourably, but gifts to other people can still create a CGT position. So “I did not sell it, I just gave it away” is not automatically the magic sentence people hope it is.

How does it get reported?

That depends on what has been sold.

For many gains, the details go through Self Assessment, using the Capital Gains pages if needed.

If it is a reportable UK residential property gain, HMRC says that is usually dealt with through the separate UK property CGT reporting service within the 60-day window.

This is one of the big reasons we make such a fuss about clients telling us things early.

A capital gain mentioned in January is one thing.

A property sale mentioned six months after the deadline is a very different flavour of email.

Giant flashing sign: when specialist advice is the sensible move

Here is the honest bit.

If your situation includes any of the following, it is probably no longer “wee guide” territory:

• selling a business

• selling part of a business

• shares with reliefs attached

• gifted assets

• trusts

• probate or inherited assets that were later sold

• separation or divorce

• overseas property or overseas assets

• large or unusual gains

• complicated crypto history

• anything where the words “restructure” or “hold-over” appear

That is not us being dramatic.

That is us being realistic.

Final thought

Capital Gains Tax is one of those areas where knowing the basics is genuinely useful.

But it is also one of those areas where confidence can exceed competence at a frankly alarming speed.

So this is the simple version.

If you are a freelancer, sole trader or small business owner, the main thing to know is this:

• your normal trading income is not usually a capital gain

• selling assets can create one

• crypto and property are common danger zones

• the annual exempt amount is small now

• and some situations need proper specialist advice very quickly

In other words:

If it is simple, we can usually help explain the basics and include straightforward information where appropriate.

If it is not simple, this is where the wee guide politely backs away and lets a specialist take over.