Advance notification calculator

Quickly calculate your R&D tax credit deadlines. Enter your company’s financial year-end to see your advance notification deadline and the final claim submission deadline.

Introduced in 2023, R&D advance notification is a compulsory form that some companies must submit to HMRC to declare their intention to make an R&D tax credit claim. Its purpose is simply to let HMRC know a claim is coming.

The most critical aspect of this form is its deadline: it must be submitted online within six months of the end of the accounting period for which you plan to claim. If you are required to file this form and miss the deadline, your R&D claim for that period will be invalid. Find out your advance notification and your full claim deadlines below to ensure you don’t miss out on valuable tax credits.

This calculator is intended for illustration purposes only.

Your results

Your advance notification deadline

This is the date you must notify HMRC of your intention to claim

Your full claim deadline

This is the final date you can submit your full R&D claim as part of your company tax return

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