The Hidden Cost of Reconstructing R&D Evidence After the Work Is Done

In brief

• Preparing a research credit claim after the year ends usually means reconstructing which business components existed, what was tried and who did it.
• Much of that time is not recorded separately, so its cost is easy to underestimate. A few weeks of time recording on a sample of engagements will show it.
• Reconstructed evidence is also weaker evidence: the IRS’s audit guides emphasise records made at the time.

What reconstruction involves

• repeated requests to the client for project documents, then following up;
• interviews with engineers about what was attempted, what failed and why;
• searching issue trackers, source control, shared drives and chat for the year;
• working out who performed, supervised or supported the research, and for how much of their time;
• reconciling the technical account with payroll, invoices and the general ledger.

Identifying business components after the fact

Form 6765 asks for components identified “consistent with how you maintain the books and records that substantiate the qualified research activities and associated QREs” (instructions, column 49(c)), and from tax years beginning after 2025 many taxpayers must report them in Section G. When components are defined only at claim time, the records were not kept that way, and matching activities and costs to them becomes a reconstruction exercise in itself.

Missing context and staff turnover

A commit message or ticket title rarely explains why an approach was abandoned. That context lives with the people who did the work. When they have moved on, interviews become harder or impossible, and the account of experimentation relies on whoever remains.

Measuring the administrative cost

1. Choose a sample

Pick a handful of recent engagements of different sizes.

2. Record time by task

Separate evidence collection (requests, chasing, interviews, searching) from technical analysis, computation and review. Ask the client, where willing, how much engineering time the claim took.

3. Note what was reconstructed

Record which conclusions rest on interviews or estimates rather than records, and how they were corroborated.

4. Work out the cost

Multiply hours by a fully loaded hourly cost, separately for the firm and the client, and scale by engagements per year.

A worked example

The figures below are invented to show the method. Replace every one with your own.

In this example, evidence collection costs $2,450 of staff time per engagement ($1,650 of it the firm’s) and about $61,250 a year across 25 engagements. If records preserved during the year removed some of the requesting, searching and reconstruction, the figure would fall; how much is something to measure, not assume. Time saved is only a saving if it is used for other work. You can try your own numbers in the illustrative calculator on our home page.

Why reconstruction is weaker evidence

The regulations require records “in sufficiently usable form and detail to substantiate” the credit (Treas. Reg. §1.41-4(d)). They do not say records must be made at the time; the emphasis on contemporaneous records comes from the IRS’s examination guidance.

Continuous evidence preservation

• Agree business components and their identifiers with the client at the start of the year.
• Ask the client to tag tickets and repositories by component.
• Hold short check-ins during the year instead of one long reconstruction after it.
• Preserve engineering records automatically from the tools the team already uses, so they exist whether or not anyone writes them down.

Professional workflow implications

• Measure evidence-collection time before changing the process.
• Start with clients where reconstruction is hardest: many components, high turnover, or prior examinations.
• Keep the professional analysis and the cost methodology at the centre, whatever tools are used.

Evidence checklist

A practical list for organising records. It is a recordkeeping aid, not a test of whether work qualifies.

• Time recorded for evidence collection separately from analysis and computation, on a sample of engagements.
• The number of document requests per engagement and the time each took to be answered.
• Business components that had to be defined after the year ended, and how they were matched to costs.
• Statements that rest on interviews rather than records, and who gave them.
• People who had left before the claim was prepared, and the effect on the evidence.
• The clients where collecting records during the year would make the most difference.

Where Evidante fits

Official sources

Grouped by what kind of source each is, because they do not carry the same weight. Checked on 11 Oct 2026.

Educational information only. Not tax or legal advice. This guide concerns the federal research credit; state credits have their own rules. Rules change and depend on the taxpayer and tax year; check the current IRS sources and take professional advice before acting. Evidante is not endorsed by the IRS.