The R&D Tax Credit in 2026: What Founders Can Claim

If you write code, build product, run experiments, or solve technical problems that don't have an off-the-shelf answer, you may qualify for the federal R&D Tax Credit. The 2026 version, expanded by the One Big Beautiful Bill Act (OBBBA), can offset payroll taxes up to $500,000 per year for early-stage companies. That is a meaningful number for a pre-revenue or early-revenue startup.

This post walks through the basics: who qualifies, what the four-part test looks like, what documentation matters, and the most common places founders leave money on the table.

Range-bound disclaimer: Every credit calculation depends on your specific facts. Numbers in this post are illustrative ranges, not promises. A licensed CPA reviewing your actual records will give you the credit you can actually claim.

What changed in 2026

The federal R&D credit (Section 41) has existed since 1981, but two things shifted recently:

• OBBBA raised the payroll-tax offset ceiling. Companies under five years old with under $5M in gross receipts can apply the credit against payroll tax (Social Security + Medicare). The cap moved from $250,000 to $500,000 per year.
• Section 174 amortization is on a known schedule. R&D expenditures must still be capitalized and amortized over five years (domestic) or 15 years (foreign), but the rules are stable and the calculation tooling has matured.

For a typical bootstrapped or early-VC company spending $300K to $800K on engineering payroll, this can mean a credit in the range of $30K to $80K, depending on what counts as qualified research.

The four-part test

For an activity to count as qualified research under Section 41, it must:

1. Have a permitted purpose. Developing a new or improved business component (product, process, software, technique, formula, or invention).
2. Be technological in nature. Relying on principles of engineering, computer science, physical science, or biological science.
3. Have technical uncertainty. At the start, you didn't know if the approach would work or how to achieve the result.
4. Involve a process of experimentation. Evaluating one or more alternatives through testing, modeling, or systematic trial.

Most software work at a tech-driven startup passes all four. The places founders often miss: cloud-infrastructure experiments, ML model tuning, performance optimization sprints, integration work that required novel approaches.

What counts as qualified research expenditure (QRE)

Three buckets:

• Wages for employees engaged in qualified research (engineers, technical PMs, technical co-founders).
• Supplies consumed in the research (cloud compute used in experiments, prototyping materials).
• Contract research at 65% of the amount paid to US-based contractors.

The biggest bucket for a software company is wages. If you can attribute 60% of an engineer's time to qualified research, that 60% of their salary + payroll taxes is QRE.

Documentation that holds up

The IRS wants to see contemporaneous records. The documentation pack we build for clients typically includes:

• Sprint logs or project trackers (Linear, Jira, GitHub Projects)
• Git commit history with technical descriptions
• Payroll records mapped to projects
• Architecture decision records or design docs
• Bug reports / incident postmortems (these prove the experimentation step)

Documentation built after the fact is weaker. Documentation that exists naturally because the team uses modern tools is stronger.

Where founders leave money on the table

After running R&D studies for technical founders, three patterns repeat:

1. They exclude non-engineer technical work. A founder writing technical specifications, a designer running A/B experiments on a novel UX pattern, a data scientist tuning models. All of this can count.
2. They miss state credits. California, New York, Texas, and 35+ other states have their own R&D credits, sometimes more generous than federal. We add these to every study.
3. They don't take the payroll offset early. A pre-revenue startup with no income-tax liability often skips the federal credit, not realizing the payroll-tax offset puts cash back in the business this quarter.

What the engagement looks like

A typical R&D Tax Credit study with Vega:

• Week 1: Kickoff. We pull data from payroll, GitHub, Linear, your project management tool.
• Week 2 to 3: Activity attribution. We map who worked on what.
• Week 4: Credit calculation. Federal + applicable state.
• Week 5: Documentation pack. Sprint logs, git evidence, payroll attribution, technical write-up.
• Outcome: The credit is filed on your annual return (or, for pre-revenue startups, against payroll tax on Form 8974).

If you want to know what your credit may look like, the Vega Free Tax Strategy Map takes about 5 minutes. Upload your prior return + a payroll summary and we'll email a range-bound estimate.

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Sources: IRC Section 41, IRC Section 174, IRS Form 6765, IRS Form 8974, One Big Beautiful Bill Act (2026). Every claim should be verified by a licensed CPA reviewing your specific facts.