Capital Gains Tax on UK property and other assets

Capital Gains Tax catches people out for two reasons. The first is that the tax is worked out on the gain rather than on the money you receive, so a sale that felt modest can still produce a liability. The second is timing: for UK residential property there is a separate reporting and payment deadline that runs from completion, not from the end of the tax year. This guide explains the principles in plain English so you know what to gather and when to act.

What Capital Gains Tax is

Capital Gains Tax is a tax on the profit you make when you dispose of an asset that has risen in value. The gain is broadly the disposal proceeds less what you paid for the asset, less the costs of buying, improving and selling it. If the result is a loss rather than a gain, there is no tax on that disposal, but the loss may be useful against other gains.

It is the disposal that matters, not the receipt of cash. Selling, giving away, transferring into a company or trust, exchanging one asset for another and receiving a capital sum from insurance can all count. This is why gifts of property to family members so often produce an unexpected tax bill: no money changes hands, but the disposal is treated as taking place at market value.

Common disposals that trigger a charge

• Selling a second home, holiday home or buy-to-let property
• Selling land, or part of a garden sold separately from the house
• Selling shares, funds or other investments held outside a tax-free wrapper
• Gifting or transferring an asset to a child, sibling or other relative
• Transferring a property into a company you own
• Disposing of a business or business assets
• Selling a valuable personal possession above the chattels limit
• Disposing of cryptoassets

Assets held inside an ISA or pension are outside the charge, and your own home is usually relieved in full. Cars used privately are exempt.

Residential property: second homes and buy-to-let

Residential property is the area where we see the most confusion, and the one with the tightest deadlines. If you dispose of a UK residential property that is not covered in full by relief on your own home, you need to know the gain quickly, because the reporting and payment window runs from completion.

To work out the gain on a rental or second property we normally need:

• The completion statement for the purchase and for the sale
• Original purchase price, stamp duty, legal fees and survey costs
• Estate agent and legal fees on sale
• Invoices for capital improvements made during ownership
• The dates you owned it, and any periods you lived in it as your main home
• Whether the property was ever your only or main residence, and when
• Details of any co-owners and the share each person held

Where a property was your home for part of the period of ownership, part of the gain is normally relieved. Where it was let for part of the period, the letting profits are dealt with separately through your tax return. Our landlord records guide covers the income side, and the two calculations rely on different paperwork.

Rates on residential property gains have historically differed from rates on other assets, and they have been changed more than once, so we work from the rates that apply on your date of disposal rather than a figure quoted in a guide.

Your own home and private residence relief

Most people never pay Capital Gains Tax when they sell the home they live in, because private residence relief covers the gain. The relief is not unlimited, and the following situations are worth checking rather than assuming:

• You owned the property for a period when it was not your main home, for example while it was let
• You own more than one residence, so which one qualifies is a question of fact and election
• Part of the property was used exclusively for business
• The grounds are large, or you are selling land separately from the house
• You developed the property or built with the intention of selling at a profit
• You moved out before completion and there was a long gap

Where relief covers only part of the period of ownership, the gain is usually apportioned. Tell us the dates as accurately as you can, because they drive the calculation.

Shares and other investments

Gains on shares, funds and similar investments held outside an ISA or pension fall within Capital Gains Tax. Two points matter in practice. First, where you have bought the same holding on several occasions, the cost is pooled and averaged rather than matched to a particular purchase, and special rules apply if you sell and buy back the same shares within a short period. Second, the paperwork platforms provide varies widely; some give a ready-made gain calculation and others give only a transaction history, and we can work from either.

Reinvested dividends and accumulation units still form part of your cost, and are often overlooked. Corporate actions such as takeovers, share reorganisations and stock splits also affect the calculation.

Gifts, spouses and connected persons

Giving an asset away is a disposal. Where the recipient is a connected person (a child, parent, sibling or a company you control, for example), the disposal is treated as made at market value, whatever was actually paid. That means a property gifted to a child can create a tax bill for the person making the gift even though they received nothing.

Transfers between spouses and civil partners who live together are treated differently: they normally pass across at no gain and no loss, with the receiving spouse taking on the original cost. That matters when a jointly owned asset is about to be sold, and it also means the position on separation and divorce needs looking at specifically, because the treatment changes over time. Please speak to us before making the transfer rather than afterwards; once a transfer is done, the options narrow considerably.

Gifts can also have Inheritance Tax consequences that sit alongside the Capital Gains Tax position. Where that is relevant we will say so, and where legal work such as conveyancing or drafting is needed you will need a solicitor as well.

Inherited assets and probate value

When you inherit an asset you generally take it on at its value at the date of death, so gains that accrued during the deceased’s lifetime are not taxed on you. Your gain is measured from that value, which makes the probate valuation an important document to keep. Where no formal valuation was obtained, we may need to establish a reasonable value for the date of death, supported by evidence.

Inherited property that is then let, or held for several years before sale, can show a substantial gain measured from the probate value, so it is worth knowing the number before you commit to a sale price.

Allowable costs, improvements and repairs

You can deduct the cost of acquiring the asset, the incidental costs of buying and selling, and expenditure that enhanced the value of the asset and is reflected in its state at disposal. You cannot deduct costs already claimed against income.

The distinction that causes the most argument is improvement against repair:

• Usually capital improvements: an extension, a loft or garage conversion, a new conservatory, adding central heating where there was none, a first fitted kitchen.
• Usually repairs and renewals: redecorating, replacing a worn kitchen or bathroom with a similar one, repointing, replacing a boiler like for like.

Repairs on a let property are generally claimed against rental income instead, so nothing is lost by classifying them correctly, but the same cost cannot be claimed twice. Keep invoices, not just bank entries: an invoice describing the work is what supports the treatment.

Losses, allowances and rates

Losses on chargeable assets are set against gains of the same tax year first. Unused losses can normally be carried forward against later gains, provided the loss has been notified to HMRC within the time limit, which is why it is worth reporting a loss even in a year when you owe nothing.

Each individual also has an annual exempt amount, so gains below that level in a tax year are not taxed. The amount of that allowance and the rates of tax have changed repeatedly in recent years, and the rate applying to you depends on your total income as well as the type of asset, so we deliberately do not quote figures here that could be out of date by the time you read this. We will apply the allowance and rates in force for your date of disposal and show you how the number is arrived at.

There is no reliable way to know your liability without the figures. We will not tell you a disposal is tax-free, or that a repayment is due, before we have seen the paperwork.

UK property reporting and payment deadlines

This is the part to act on. Where a disposal of UK residential property produces a Capital Gains Tax liability to pay, it generally must be reported to HMRC and the tax paid within 60 days of completion, not at the end of the tax year, and not by the following January. There are exceptions, and the gain may also need including on your Self Assessment return. Late filing brings penalties and interest even where the tax has been estimated generously.

Practical consequences worth planning around:

• Start gathering purchase paperwork when the property goes on the market, not after completion
• Each co-owner has their own reporting obligation for their share
• An estimate may be needed if a figure is genuinely not yet known, and refined later
• Non-UK residents disposing of UK property have reporting obligations even where no tax is due
• Deadlines and the mechanism have changed before, so we confirm the current position for your completion date

The official rules are on GOV.UK: report and pay your Capital Gains Tax (opens in a new tab).

If you have already completed and think you may have missed a deadline, get in touch anyway. Reporting late is better than not reporting, and the penalty position is usually improved by dealing with it promptly.

How it fits with Self Assessment

A property return during the year does not replace your tax return. Chargeable gains are also reported on your Self Assessment return for the year, with credit given for tax already paid on a property return. Because the final rate depends on your income for the whole year, the annual return is where the position is settled, sometimes producing a small further payment, and sometimes a repayment.

If you do not currently file a return, a chargeable gain may bring you into Self Assessment. Our taxation services and planning covers both the gain and the return, and if you are a landlord moving to digital reporting our Making Tax Digital service covers the income side.

Records to keep

• Completion statements and solicitors’ invoices for purchase and sale
• Invoices for improvement work, with a description of what was done
• Stamp duty, survey and agent fees
• Dates of occupation where a property was ever your main home
• Probate valuations for inherited assets
• Contract notes, platform statements and details of reinvested income for investments
• Ownership shares where an asset is held jointly

Keep them for as long as they may be needed to support a future disposal, which can be many years after the spending. Digital copies are fine and far easier to find later.

How Bee & Co can help

We are a cloud-based practice working with clients across the UK, so you can send documents digitally and deal with the same person throughout. On a Capital Gains Tax matter we typically:

• Calculate the gain or loss and explain each figure in the computation
• Identify the reliefs that genuinely apply to your circumstances
• Prepare and submit the UK property return within the deadline, and tell you what to pay
• Report the gain in your Self Assessment return and reconcile tax already paid
• Notify losses so they remain available in future years
• Look at the position before a planned sale or gift, while there are still choices to make

Get in touch with the basic details of the asset and the dates, and we will tell you what we need and what it would cost.

This guide is general information about how Capital Gains Tax works and is not advice for your circumstances. Allowances, rates, deadlines and reliefs change, and the treatment of any disposal depends on its own facts, so please check with us before acting. Legal work such as conveyancing, and advice on wills and estate planning, is outside our services.