R&D Advance Assurance Pilot - Yes or No?

Why Has HMRC Introduced This?

The launch of Advance Assurance is part of a broader shift in HMRC’s approach to R&D tax relief compliance.

Over the past several years, HMRC has introduced:

• the Additional Information Form (AIF) 

• mandatory digital submission 

• a claim notification requirement for new and infrequent claimants

• increased enquiry activity 

• the merged RDEC-style scheme with new rules around contracted-out and overseas R&D.

The overall direction is clear: HMRC wants greater transparency, stronger technical justification and earlier identification of risk areas.

Advance Assurance appears designed to help claimants get things right and move some of that technical scrutiny earlier in the process.

The Potential Benefits

For some businesses, Advance Assurance could provide meaningful advantages.

1. Greater certainty before submission

Where a claim contains a genuine grey area, obtaining HMRC’s view upfront may reduce uncertainty before significant costs are included in a return.

This could be particularly valuable where:

• the claim value is substantial 

• the technical position is complex 

• the business is highly risk-sensitive 

• investors or auditors require additional confidence 

2. Potentially lower enquiry risk

If HMRC has already reviewed a particular scenario in advance, it may reduce the likelihood of that specific issue becoming the subject of a later enquiry.

That does not necessarily mean the entire claim becomes “enquiry proof”, but it could narrow the scope of future challenges.

For businesses concerned about disruption, this may be attractive.

3. Useful for technically complex claims

The service is intended to be relevant where legislation has recently changed or where guidance remains open to interpretation. It will be particularly relevant for large claims with complex scenarios.

For example:

• new claimants that want to test a project meets the statutory definition of R&D

• engineering businesses conducting R&D on overseas sites

• businesses with mixed contractual arrangements either upstream or downstream

• businesses working with specialist overseas research establishments

• loss making businesses with connected parties undertaking R&D that aren’t sure if they meet exemption rules for the R&D cap. 

These are areas where many advisers are still seeing uncertainty across the market.

Visit Claiming RDEC Index Page

But There Are Also Potential Downsides

This is where businesses should pause before assuming Advance Assurance is automatically beneficial.

1. It may increase preparation work

To obtain meaningful assurance, companies will likely need:

• stronger technical documentation 

• clearer project narratives 

• detailed explanations of uncertainties 

• robust cost mapping 

• supporting contractual evidence 

For some businesses, preparing an Advance Assurance submission could approach the level of work involved in an enquiry response.

HNRC states that the form has to be completed in one go, so teams will need to ensure they are well prepared before they even click "Apply."

Smaller claims with relatively straightforward positions may not justify the additional process.

2. It could extend timelines

HMRC has indicated a target response time of 40 days but this is not guaranteed and HMRC has explicitly stated that they may temporarily pause access to the application portal if they get overwhelmed by demand during this 12-month pilot. This means businesses cannot treat this as a last-minute safety net and they should always consider:

• internal preparation time 

• adviser review time 

• potential HMRC follow-up questions 

• delays to submission planning 

Where a company is comfortable with its technical position already, adding another stage into the process may not always be commercially worthwhile.

3. Assurance may only apply to narrow points

One important consideration is that the service focuses on specific areas rather than approving an entire claim.

That means:

• other areas of the claim could still be reviewed later 

• future projects may differ materially 

• factual circumstances may change 

• costs could still be challenged separately 

Businesses should avoid viewing Advance Assurance as a blanket approval mechanism.

Who Is Most Likely to Benefit?

Clearly Advance Assurance will be helpful to advisers and businesses managing clients with unusual or borderline technical positions where obtaining early clarity could prevent prolonged disputes later.

In summary my view is that Advance Assurance may be most useful for businesses that:

• have genuinely complex technical positions 

• are dealing with legislative grey areas 

• have high-value claims 

• are entering the R&D scheme for the first time 

• are concerned about investor or audit scrutiny of areas within scope for Advance Assurance

• operate in sectors facing increased HMRC attention 

Who May Not Need It?

Advance Assurance may be less useful where:

• claims are relatively straightforward 

• technical eligibility is already well established 

• robust documentation exists 

• the claim value is modest 

• the additional process outweighs the potential benefit 

In some situations, a well-prepared claim submitted through normal channels may remain the more efficient route.