Skip to content
R&D Tax Academy
Contact us

Module 3: Choosing an advisor

Fee models and the incentives they create, what to put in a brief, how to score proposals on one sheet, and how to check the claim before you sign it.

Leadership BriefingLast reviewed 2 October 2026

An advisor will shape your claim, your exposure under review and the fee you pay. This module gives directors a way to choose one that can be explained to the board: understand the fee models and the incentive each creates, send a brief, compare proposals on one scoring sheet, and check the claim before you sign it.

What this module covers

  • Fee models and the incentive each creates.
  • What to put in the brief and the questions to ask every candidate.
  • A scoring sheet for comparing proposals.
  • How to check the claim before you sign, and where each country's process touches the advisor.

Fee models and their incentives

Fees vary widely. Contingent fees are commonly quoted as a percentage of the benefit, while fixed and hourly fees are also used, sometimes in combination. The fee model shapes the advice you receive, so understand what you are being offered. Independent guidance on fee structures is at knowyourfees.org.

No model is wrong in itself. Each rewards something, and the board's job is to know what and to put a control against it.

Fee modelHow it is quotedWhat it rewardsControl to ask for
ContingentA percentage of the benefitA larger claim, since the fee rises with it, and speedYour technical staff approve the narrative before filing; the terms say what happens to the fee if the claim is reduced or repaid; review support is included or priced
FixedA set amount for a defined scopeEfficiency, which can mean less technical time than the claim needsA scope that names the technical work, who does it and the hours assumed; a stated price for review support
HourlyA rate for time spentTime, with no direct link to the size or quality of the outcomeAn estimate with a cap, a breakdown by task, and named people at each rate
CombinationA fixed element plus a percentage, or a capped percentageA mix of the aboveThe same controls, applied to each element

Whether contingent fees are permitted depends on the jurisdiction and the professional body the advisor belongs to. Ask the advisor which rules apply to them and how their fee complies, and record the answer.

The brief and the questions to ask

Send every candidate the same one-page brief: the business, the countries you claim in and the scale of technical activity; what you already have (project list, documentation routine, previous claims and their outcomes); what you want (full preparation, calculation and filing only, review support, or training for your team); how you want to pay, or that you want options; and a deadline and format for proposals. A brief forces comparable proposals. The guide How to brief and evaluate an R&D tax advisor gives the full list of ten questions to ask. For the board, six matter most:

  • How the fee is calculated and what it amounts to in money.
  • Whether review support is included.
  • What happens to the fee if the claim is reduced or repaid.
  • Who does the technical work.
  • Whether your own technical staff will approve the narrative before filing.
  • Whether the advisor will be named on the claim where the tax authority asks for it.

Put the answers in the engagement letter. An answer that is clear in a sales meeting and absent from the contract is not an answer.

Comparing proposals

Score every proposal on the same sheet. The weights below follow the guide; adjust them for what matters to you, but fix them before the proposals arrive, not after.

CriterionWeightWhat good looks likeWarning sign
Technical capability in your field30Named people with relevant experience who will do the workReluctance to name who does the work
Process and evidence25A clear method; your staff approve narratives; records retained and returned to you"Everything qualifies"; narratives written without your engineers
Review support20Included, with a described process and a named leadAssurances that review is unlikely; support priced only on request
Fee structure and total cost15Transparent, proportionate to the work, clear on reduction or repaymentA fee quoted before anyone has asked about the technical work
References and track record10Clients whose claims have been through a review and who stayedNo client who has been through a review

Score the proposal as written, then the answers to the six questions, and keep the sheet. The next time you tender, you start from it.

Checking the claim you sign

The company signs the return, so the board's last control is the claim itself. Before signing, the claim owner confirms six things.

  1. The project list matches what the technical lead approved, and each project has a stated reason for inclusion.
  2. The narrative was approved in writing by your own technical staff, not only by the advisor.
  3. The cost schedule reconciles to the ledger, with the apportionment basis for staff time, and any grants have been netted off.
  4. Any registration, approval or notification step for that country was completed by its deadline.
  5. The advisor is named where the country's process asks, and the company holds a complete copy of everything filed and the working papers behind it.
  6. The exposure is understood: what would be repaid, with interest, if the largest project were excluded.

Illustrative example

Illustrative example. Harbour Robotics Ltd, a hypothetical company, expects a claim on 1,000,000 of eligible costs and a benefit of 150,000 at that country's rate. Three proposals arrive. Proposal A is a contingent fee of 20% of the benefit, so 30,000, with review support charged separately and the narratives written by the advisor from interviews. Proposal B is a fixed fee of 25,000 including review support, with a named engineer doing the technical work and the company's own engineers approving each narrative before filing. Proposal C is hourly, estimated at 20,000 to 35,000 with no cap. On the expected outcome A and B cost about the same. The board then asks what happens if a review excludes one project and the benefit falls to 100,000. Proposal A does not say whether its fee is recalculated, and the company would repay 50,000 with interest and pay for review support on top. Proposal B's fee is unchanged and the support is included. Proposal C depends on how long the review takes. The scoring sheet ranks B first on process, review support and fee clarity, A second and C third, and the board can explain why.

Across the seven countries

Each country's process touches the advisor in a different place.

CountryWhere the advisor appears in the process
United StatesA taxpayer claiming the credit must retain records in sufficiently usable form and detail to substantiate that the expenditures claimed are eligible, so keep the advisor's working papers
United KingdomThe additional information form requires the details of any agent who advised on the claim and the senior officer of the company responsible for it; a company cannot show reasonable care merely by appointing an agent
IrelandRevenue expects contemporaneous documentation for the science test and the accounting test; agree which of these the advisor produces and which the company keeps
CanadaForm T661 Part 9 asks for claim preparer information; where it is missing or incomplete a penalty of C$1,000 applies, for which the claimant and the claim preparer are jointly and severally liable
AustraliaThe customer portal is accessed by the company or an authorised tax agent or R&D consultant; registration does not amount to a decision that the activities are eligible
New ZealandThe general approval application is filed through myIR; the approval binds the Commissioner only to the extent the activities are performed in accordance with the application, so what the advisor writes must match what the team does
SingaporeIRAS requires an R&D claim form for larger claims and may request further information, including project descriptions and the expenditure breakdown, before finalising the assessment

Where to go next

Self-check questions

Answer each question, then open it to compare.

A proposal quotes a percentage of the benefit. What must you establish before comparing it with a fixed fee?
What it amounts to in money on your numbers, whether review support is included, what happens to the fee if the claim is reduced or repaid, and who does the technical work. Only then are the two proposals comparable.
Are contingent fees permitted?
It depends on the jurisdiction and the professional body the advisor belongs to. Ask the advisor which rules apply to them and how their fee complies, and record the answer in the engagement letter.
Why should your own technical staff approve the narrative before filing?
They did the work and are the only people who can say where the uncertainty lay and when it was resolved. The company is responsible for the return, and a reviewer will test the narrative against the records and the people, not against the advisor.
Name two countries whose claim process records who advised on or prepared the claim.
The United Kingdom, where the additional information form requires the details of any agent who advised on the claim and of the senior officer responsible for it, and Canada, where Form T661 asks for claim preparer information and a C$1,000 penalty applies where it is missing or incomplete.
What belongs in the engagement letter?
The answers to the six questions: how the fee is calculated and what it amounts to in money, whether review support is included, what happens to the fee if the claim is reduced or repaid, who does the technical work, whether your technical staff approve the narrative before filing, and whether the advisor will be named on the claim where the tax authority asks.

Official sources

Register interest in Leadership Briefing

Tell us where you claim and we will let you know when this program opens for your country.

Register interest

Educational content only, not tax advice. See the disclaimer.