Property, investment and business disposals
Capital Gains Tax Accountant in Cardiff
We calculate the gain from the transaction records, examine the reliefs supported by your circumstances and complete the correct Capital Gains Tax report. Property, shares, business assets, gifts and cryptoassets each need a different evidence trail.
For individuals, landlords, company owners, trustees and internationally connected clients across Cardiff and South East Wales.
Start with the transaction
When should a Capital Gains Tax accountant review the position?
A review is useful before a disposal where ownership, valuation or relief conditions can still be clarified. After completion, the priority is to establish the reporting deadline and calculate the gain from reliable records.
Read the official Capital Gains Tax overview ↗You have sold a buy-to-let, second home or former home
Occupation history, ownership, improvement costs and the completion date can all change the calculation or reporting route.
You are selling a business, company shares or business assets
The structure of the disposal and the qualifying history must be checked before any business relief is claimed.
You have sold shares, funds or cryptoassets
Individual transactions may need pooling, same-day or short-window matching rather than a simple purchase-price deduction.
You are gifting or transferring an asset
A transfer without cash can still be a disposal at market value, including some transactions between connected people.
You acquired an asset through inheritance or a trust
The probate value, later expenditure, beneficial ownership and the person making the disposal need to be distinguished.
A deadline has passed or a previous calculation may be wrong
The return, payment, interest position and any annual Self Assessment reporting should be reviewed together.
Calculation, relief and reporting
What our Capital Gains Tax service includes
A CGT return is only as sound as the work beneath it. We establish the taxable event, rebuild the cost history and document the assumptions before preparing the report.
Disposal and ownership review
We identify the asset, legal and beneficial owners, acquisition and disposal events, tax year and whether market value rules may apply.
Cost and valuation schedule
Purchase, probate or historic values are reconciled with incidental costs and evidenced capital improvements.
Relief and loss analysis
We consider available reliefs, current and brought-forward losses, the annual exempt amount and claim conditions relevant to the facts.
Rate calculation
The gain is combined with the individual’s taxable income so the correct proportion falls within each applicable CGT rate band.
HMRC property or gains report
We prepare the appropriate online property return or real-time CGT report and confirm the supporting calculation.
Self Assessment reconciliation
Where an annual return is required, the disposal and any earlier payment are brought into the year-end tax position without duplication.
You receive the calculation, filing confirmation and a clear record of the amount and payment date.
How the fee is scoped →The calculation path
How a chargeable gain is worked out
The sale price alone does not establish the taxable gain. The calculation begins with the disposal proceeds—or market value where the rules require it—and then follows the asset’s ownership and cost history.
Not every amount spent on an asset is deductible. Routine repairs, finance costs and expenditure already relieved against income should not be inserted as capital costs merely because they reduced the owner’s cash return.
- StartDisposal proceeds or required market valueThe consideration can include more than cash.
- LessAllowable acquisition costPurchase price, probate value or another permitted basis.
- LessIncidental acquisition and disposal costsFor example, qualifying legal, valuation and selling costs.
- LessQualifying enhancement expenditureCapital work reflected in the asset at disposal, subject to the rules.
- ThenLosses, reliefs and annual exemptionApplied in the order permitted for the person and tax year.
- ResultTaxable gain charged at the applicable rateIncome and the nature of the asset influence the final rate.
Residential property deadline
60 days from completion to report and pay when Capital Gains Tax is due Check the UK property reporting rules ↗Property Capital Gains Tax
A property sale can require two reports for the same tax year
When UK residential property is sold and CGT is payable, an online property return and payment are normally due within 60 days of completion. If the seller is within Self Assessment, the disposal is also entered on the annual return and the earlier payment is credited.
Non-residents have a wider reporting obligation: disposals of UK property or land generally have to be reported even when no tax is payable. Residence status should therefore be established before assuming the 60-day process does not apply.
Main home and former home
Private Residence Relief depends on the history of occupation
Calling a property “my home” is not the calculation. We establish ownership dates, actual occupation, periods of absence, letting, exclusive business use, nominations and the final period before disposal.
Review the official Private Residence Relief conditions ↗Full relief may be available where the statutory conditions are met throughout ownership, but the facts still need to support main-residence use.
The gain is apportioned across the ownership period. The final qualifying period and any available letting relief are considered under their specific conditions.
A nomination may be relevant, but occupation quality, timing and the household’s residence pattern must be examined.
Exclusive business use can restrict relief for that part. Mixed domestic and business use may produce a different result.
Different assets, different evidence
Capital Gains Tax calculations for property, shares and business assets
The reporting principles are connected, but the calculation mechanics and available reliefs are not interchangeable.
Buy-to-let property, second homes and land
We examine purchase and disposal documents, ownership shares, capital improvements, valuations, losses and the 60-day reporting position.
Former homes and partly relieved property
Occupation periods, absences, letting and business use are mapped across the full ownership period before Private Residence Relief is calculated.
Shares, funds, employee awards and investment portfolios
Contract notes, corporate actions and pooled holdings are reconciled so disposals use the correct matching and allowable cost.
Companies, partnerships and business assets
We review what was sold, the ownership history and whether Business Asset Disposal Relief, rollover relief or another provision could apply.
Cryptoasset disposals and exchanges
Sales, token swaps, spending and gifts can be disposals. Transaction data is converted to sterling and matched under the applicable share-pooling rules.
Gifts, inherited assets and connected-party transactions
Market value, probate value, hold-over relief and the relationship between the parties can matter even where little or no cash changes hands.
Cardiff and South East Wales
The local transaction often has a wider tax history
We regularly see gains that cannot be understood from the completion statement alone. The surrounding history determines whether the cost schedule, relief claim and reporting route are complete.
A person may have moved elsewhere in Wales or the UK while retaining the Cardiff property. The ownership period then needs to be divided between qualifying occupation, absence and letting.
Legal title, beneficial shares, earlier income reporting and the allocation of disposal costs should agree. Two owners do not automatically produce identical calculations.
A company sale, share disposal or withdrawal from a partnership may affect both business and personal tax records. Relief conditions must be tested against the actual trading and ownership history.
Land Transaction Tax concerns the acquisition of Welsh property. CGT concerns a later disposal and is a separate calculation administered by HMRC.
2026/27 figures
Capital Gains Tax rates, allowance and property deadline
These are headline figures for disposals in the tax year from 6 April 2026 to 5 April 2027. The final rate depends on who made the disposal, taxable income and the reliefs available.
Check current Capital Gains Tax rates ↗Build the evidence file
Records needed for a Capital Gains Tax calculation
Send what is available. Missing documents should be identified openly so valuations or reasonable reconstructions are considered before the return is prepared.
Acquisition and sale
- Purchase and completion statements
- Sale completion statement
- Legal and agent invoices
- Probate or historic valuations
Use and improvements
- Dates of occupation and absence
- Tenancy periods
- Invoices for capital improvements
- Ownership or trust documents
Shares and cryptoassets
- Contract notes and statements
- Corporate action history
- Wallet and exchange exports
- Earlier disposal schedules
Income, losses and reporting
- Estimated taxable income
- Brought-forward loss records
- Earlier CGT reports or returns
- HMRC references and letters
From documents to filing
How we complete the CGT work
The process changes where a completion deadline is already running, but the calculation is still documented before submission.
- Step 01
Establish scope and deadline
We confirm the asset, owner, disposal date, residence position and reports required.
- Step 02
Prepare the evidence schedule
Acquisition value, disposal proceeds, allowable costs and missing information are reconciled.
- Step 03
Calculate gain and reliefs
Losses, reliefs, exemption and rates are applied with assumptions made explicit.
- Step 04
Approve, report and pay
You approve the calculation before filing and receive the payment details and final records.
A deadline has passed
Deal with a late or incorrect CGT report using the full transaction record
Waiting usually adds uncertainty and can increase interest or penalties. We establish what should have been reported, what has already been paid and whether the annual tax return also needs an entry or correction.
Explain the current position →Calculate before submitting
Even a late return should use the strongest available evidence rather than an unsupported estimate.
Compare the filed return with the corrected calculation
The amendment route and explanation depend on the report used and the point at which the error is found.
Separate the tax, interest and penalty position
Payment should be matched to the correct reference and reporting record.
Reconcile the disposal in Self Assessment
Any amount paid through the property service is credited when the annual liability is finalised.
A quote based on the work
What affects the fee for Capital Gains Tax work?
A single property with complete records is different from a portfolio history, multiple share pools or a relief claim requiring valuation and occupation evidence. We establish scope before confirming the fee.
Read how our fees are agreed →Property, pooled shares, cryptoassets and business disposals require different calculations.
Complete contracts and schedules reduce reconstruction and correspondence time.
Joint ownership, gifts, probate values and connected parties may need extra evidence.
Private Residence Relief, business reliefs and non-residence can expand the review.
A property return, annual Self Assessment entry or correction may be needed separately.
An approaching or missed 60-day deadline changes the priority and work sequence.
Capital Gains Tax questions
Questions clients ask before a CGT return
These answers cover the normal starting position. Ownership, residence, dates and asset history can change the result.
Do I pay Capital Gains Tax when I sell my home?
Often not where the property was your only or main home throughout ownership and all Private Residence Relief conditions are met. Letting, extended absence, exclusive business use, large grounds or more than one residence can restrict or complicate the relief.
When does the 60-day property CGT deadline start?
It runs from legal completion, not exchange. A UK resident normally reports within 60 days when a disposal of UK residential property produces CGT to pay. Non-residents generally report UK property disposals even where no tax is due.
What costs can reduce a property gain?
The acquisition cost and qualifying incidental purchase and sale costs can be deductible, together with capital enhancement expenditure that meets the conditions. Mortgage interest, normal repairs and costs already claimed against rent are not simply added to the CGT cost.
Is Capital Gains Tax charged at 18% or 24%?
For an individual in 2026/27, the taxable gain is generally charged at 18% to the extent it falls within the unused basic-rate band and 24% above it. Taxable income, deductions, losses and reliefs therefore need to be calculated before the rate is final.
Do I report a gain below the £3,000 annual exemption?
Not every gain below the exemption requires a standalone report, but Self Assessment reporting can still be required where total disposal proceeds exceed the relevant reporting threshold and the person is already within Self Assessment. Property and non-resident reporting rules also need separate checks.
Does gifting an asset avoid Capital Gains Tax?
No. A gift is normally treated as a disposal at market value, although transfers between spouses or civil partners living together and some qualifying hold-over relief claims can change the immediate result.
Can capital losses reduce the tax?
Allowable losses can reduce gains under the ordering rules, and unused notified losses may be carried forward. Loss claims have time limits, while losses on disposals to connected people can be restricted.
Will the disposal also go on my Self Assessment return?
Yes, where you are required to file a return and the disposal is reportable. A residential-property return does not necessarily replace the annual CGT pages; tax already paid through the earlier report is brought into the final calculation.
Before the deadline or after it
Start with the asset, dates and records you have
We will identify the calculation, relief and reporting work required before giving you a scoped quote.
. Rates, allowances and deadlines can change; the calculation is confirmed for the relevant disposal date and tax year.