In a property sale with deferred payment, a simple question can have significant tax implications: what happens if, after signing the agreement, the purchaser and seller decide to change the dates and amounts of the outstanding payments?
This is no minor issue. In certain transactions, corporation tax regulations allow the income derived from the sale to be allocated for tax purposes according to when the deferred payments become due. Therefore, if the parties subsequently amend the initially agreed schedule, a clear question arises: should the original schedule be maintained or should the new one be followed?
The case analysed concerns a transaction in which a property developer sold a plot of land in 2022, receiving part of the price in cash and deferring the remainder. Subsequently, before the first of the deferred payments was due, the parties agreed to amend both the amounts and the due dates.
The starting point: accrual versus collection
As a general rule, corporation tax is governed by the accrual principle, meaning that income and expenses must be allocated to the tax period in which the transaction takes place, regardless of when the payment is received or made.
In a sale and purchase transaction, this generally means that the income arising from the transfer must be recognised for tax purposes when the transaction takes place. In the case under consideration, this would have occurred in 2022.
Where the requirements set out in the regulations are met, this regime allows the income obtained to be recognised on a pro rata basis as the deferred payments become due, rather than concentrating the entire tax liability at the time of the transfer.
A payment schedule that appeared to be finalised… but wasn’t
Let’s imagine that the property developer sold the plot in 2022 and recognised the revenue from the entire sale in the accounts for that financial year. However, for tax purposes, it applied the deferred payment scheme, allocating the income in accordance with the payment schedule.
The initial agreement provided for two deferred payments, due in 2023 and 2024. The situation changed in 2023 when, before the first payment was due, the purchaser and seller agreed to amend the terms originally agreed. The first payment was reduced, the second was increased, and its due date was postponed until the end of 2025.
The question was, therefore, clear: should the property developer, for corporation tax purposes, retain the original schedule or adapt the tax allocation to the newly agreed schedule? The answer depends, amongst other factors, on the timing of the contractual amendment.
If the novation is agreed before the initially scheduled payments fall due and alters the schedule for the payment of outstanding amounts, the new agreement determines the actual conditions under which the receipts will be made.
Therefore, if, following the amendment, the transaction continues to meet the requirements for the application of the forward transaction regime, the timing of income recognition must be adjusted to the new schedule.
Why is this important?
The conclusion has clear practical relevance. In high-value property transactions, an apparently contractual amendment, such as deferring a payment or redistributing the price across different due dates, may directly affect the timing of income recognition and, consequently, the point at which the actual corporation tax liability arises.
For this reason, a contractual novation should not be analysed solely from a civil or commercial law perspective. If it alters the due dates for payments, it may also affect the timing of the recognition of income for tax purposes.
Conclusion
The case analysed highlights an issue that may go unnoticed in property transactions involving deferred payment: the payment schedule is not merely a financial matter, it may also be a tax matter.
When a sale is subject to the deferred payment regime and, before the due dates of the initially agreed payments, the purchaser and vendor agree to amend the amounts and payment dates, the timing of income recognition must be adjusted to the new schedule, provided that the transaction continues to meet the requirements for the application of that regime.
Therefore, in the event of any amendment to a deferred-payment property sale, it is advisable to review not only what is being changed in the contract, but also what impact that change has on the timing of income recognition for corporation tax purposes.
Because, in tax matters, changing the date of a payment sometimes means much more than simply changing a date.



