R&D tax
How long does an R&D tax credit claim take, start to payment?
A realistic timeline for a UK R&D tax claim: preparation, the additional information form, HMRC processing, payment, and the deadline for claiming past accounting periods.
Preparation: two to four weeks of elapsed time
A well run claim takes two to four weeks from kick off to a signed report, and only a few hours of that is your time. The work is technical interviews with the people who did the R&D, gathering payroll and supplier data, agreeing apportionment, and drafting the narrative.
The usual cause of delay is not the writing. It is waiting for cost data from finance or for a technical lead to find a diary slot. Book those two things at the start and the rest runs to schedule.
Filing: the return and the additional information form
A claim is made in the corporation tax return for the accounting period. HMRC also requires an additional information form to be submitted before or at the same time as the return, setting out the projects, the qualifying costs and the competent professional responsible.
If the form is missing, HMRC removes the claim from the return. Companies must also notify HMRC in advance of their intention to claim in some circumstances, typically where they are new claimants or have not claimed in the recent past, and that notification has its own window tied to the accounting period.
HMRC processing and payment
HMRC aims to process the majority of R&D claims within a target of around 40 days, and payable credits are generally settled by bank transfer once processed. In practice, payment commonly arrives somewhere between four and ten weeks after filing.
Claims can take longer where HMRC opens a compliance check, where the company has outstanding liabilities that the credit is offset against, or where PAYE and NIC caps on the payable amount apply and need calculating.
How far back you can claim
You can normally amend a corporation tax return for up to two years after the end of the accounting period, which means two prior years are usually still open to a first claim. Once that window closes on a period, the relief for that year is gone.
If you have never claimed, this is the point worth acting on quickly. Every month of delay risks a whole accounting period falling out of reach.
A realistic end to end view
For a company starting today with reasonable records, three months from first conversation to cash is a sensible expectation, of which roughly a month is preparation and the rest is HMRC. Claims filed with the return at the year end simply join the same queue.
Rates and administrative requirements are set by HMRC and can change at a Budget, so confirm the rules that apply to your accounting period before planning around a date.
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