After completion, the CGT position is largely determined. The gain has crystallised, the tax year is fixed, and the available reliefs are set by the circumstances at the date of disposal. Before completion, there are decisions that can legitimately affect the outcome. Timing the disposal, identifying all allowable costs, reviewing ownership, and considering reliefs and exemptions are all more effective when they are addressed before the sale rather than at the point of filing the return.
The tax year in which the disposal falls determines which annual exempt amount is available — currently GBP3,000 per person — and how the gain interacts with your other income and gains in that year. If you are selling close to the end of the tax year, completing after 6 April means the gain falls into the following year, which may give access to a fresh annual exempt amount and potentially different rate bands depending on your income position. Where you are selling multiple properties, staggering disposals across tax years can access multiple annual exempt amounts and keep gains within the basic rate band where possible.
Many property owners underestimate their allowable costs. Beyond the original purchase price, stamp duty, and legal fees on acquisition, any capital improvement expenditure incurred during ownership reduces the chargeable gain. This includes extensions, structural alterations, conversions, new kitchens and bathrooms where they constitute an improvement to the property (not a like-for-like replacement), and professional fees associated with the improvement work. Repairs and routine maintenance do not qualify.
In our experience, this is where a significant proportion of the tax savings sit. Clients have paid for improvements over years of ownership but have not kept the records organised in a way that connects them to a future property disposal. We review the available records — invoices, bank statements, building control records — and identify every cost that qualifies as allowable expenditure for CGT purposes.
If the property is jointly owned, the split of ownership affects how the gain is taxed. Where one owner is a basic rate taxpayer and the other is higher rate, the allocation between them matters. If the property could be transferred to a spouse before sale, this can access both annual exempt amounts and potentially shift part of the gain into a lower rate band. The rules and practicalities of spouse transfers are covered in detail on our Spouse & Connected Party Transfers page.
The annual exempt amount, capital losses brought forward, PPR relief (where applicable), and letting relief all reduce the taxable gain. In some cases, pension contributions made before the end of the tax year can extend the basic rate band, which means a larger portion of the gain is taxed at 18 per cent rather than 24 per cent. These interactions need to be modelled with the actual numbers rather than assumed.
We model the CGT position before you commit to the sale. We identify all allowable costs from the available records, review the ownership structure, advise on timing, and calculate the expected liability under different scenarios. We present the options clearly so you can make an informed decision. After completion, we file the 60-day CGT return and reconcile the position through self-assessment.
Schedule a free 30-minute consultation to discuss your personal tax compliance.
