Use our R&D tax deadline tool to identify the key dates and deadlines for making your R&D tax credit claim.
Select your accounting period end date to see the R&D tax claim deadlines for your business:
If your business is looking to claim R&D tax credits, there are four main deadlines that you’ll need to meet:
- Submit your Claim Notification: You may need to notify HMRC within 6 months if you’re a first-time claimant, you haven’t claimed in 3 years, or you’ll submit an amended return.
- File your accounts: Company accounts are due nine months after your year end.
- Submit your tax return: Company tax returns are due 12 months after your year end.
- Submit your R&D tax claim: You have two years from the end of your accounting period to submit an R&D claim. Mention what this involves – link to AIF here.
To get an overview of when these deadlines will fall for your business, simply enter your accounting period end date above. Once you’ve done that, you’ll be able add the deadlines to your own calendar for future reference.
To get started with your R&D claim, get in touch with our specialist R&D claim team.

