Should Business Owners Amend Past Tax Returns to Claim R&D Tax Credits Before the 2026 Deadline?

In Brief:

• A limited-time opportunity exists for eligible small businesses to retroactively claim R&D tax credits and fully expense research costs for 2022–2024, but action must be taken before the July 6, 2026, deadline.
• Not every business will qualify, as companies must meet specific criteria, including having average gross receipts under $31 million and not being classified as a tax shelter.
• Those who do qualify should be aware that all three years must be amended—partial filings are not allowed—and returns must be mailed in advance of the statute deadline.
• While the potential benefits include reduced tax liability, refunds, or carryforwards, the true financial impact depends on factors like ownership changes, entity structure, and the costs associated with amending.
• Strong documentation, awareness of audit considerations, and guidance from experienced R&D tax professionals are critical in determining whether amending past returns is truly worthwhile.

The One Big Beautiful Bill Act (OBBBA) has made tax law changes that have created a time-limited opportunity for certain small businesses to boost cash flow by claiming R&D tax credits previously missed while also getting to fully expense research costs under Section 174 for years 2022-2024. This opportunity has many manufacturing and construction owners, and those investing in custom software, reevaluating their past filings and considering amending to claim these credits.

If you’re a small business owner considering amending your returns, it’s important to examine a few key factors first.

• Would your business qualify?
• Is there a real financial benefit for you?
• What other key factors don’t go overlooked to determine if this is worth pursuing?
• Do you need to work with a professional who specializes in R&D tax credits?

Who Qualifies?

If you are interested in exploring this opportunity for a qualified small business exception for Section 174 and claim R&D tax credits through amended returns, your business must meet a few key criteria: For years 2022-2024, average gross receipts must be under $31 million and not be considered a tax shelter in 2025.

If you meet the above criteria, your company may be eligible. That said, there are a few important rules to be aware of before moving forward:

• You must amend all three years (2022, 2023, and 2024). This isn’t optional.
• Keep to the deadlines. You must file amended returns by the earlier of the statute of limitations (generally 3 years from when the return was filed), or July 6, 2026.
• Amended returns must be mailed (not e-filed), and the IRS relies on postmark dates. That means you must send them by certified mail several days early to avoid missing the deadline.

The Potential Benefits

There are potential benefits involved in amending your returns and claiming the R&D tax credits. These are: tax credits that reduce your tax liability, cash refunds (in some cases), and carryforwards if you couldn’t use the credit previously.

Realistic Considerations

There are a few realities to consider as well. Refund timing can be slow. Based on our firm’s experience, refunds can take 9 months to 1.5 years. And your actual benefit may be lower than expected. For example: If your business had multiple owners in prior years, the credit is allocated based on ownership at that time. Also, if a former partner owned part of the company, their share of the credit goes with them.

You should also consider the other costs outside of the fee for calculating R&D Tax Credits. For C-Corps, you typically only amend the corporate return. For S-Corps/Partnerships, you must amend both the business return and individual owner returns.

You’ll need to weigh the amendment costs, R&D study fees, and your true benefit after expenses, factoring in ownership and entity type for the amendment years.

Important Details You Can’t Afford to Overlook

1. Audit Risk. While the audit risk can be generally low, it’s not zero. You will need clear documentation of your R&D projects and activities, proof of your expenses, and confidence that your prior-year returns are accurate.

2. Your Entity Type Matters. For C-Corporations, the credit stays within the company. For S-Corporation/Partnership, the credit passes through to the owners. This distinction can significantly impact who actually benefits.
3. Ownership Changes. If ownership changed during the amended years, your expected credit may shrink. For example.
   • $100,000 total credit
   • Three partners (33%, 33%, 34%)
   • One partner exits
     Remaining owners may only benefit from their portion (~66%), not the full amount and are responsible for paying the R&D fees for services.
4. State vs. Federal Differences. Federal rules allow a reduced credit under Section 280C, but many states do not follow this rule, which can affect your total benefit.

Should You Amend?

The answer depends on your situation, but here is a simple way to think about it:

It may make sense if:

• • You qualify under the revenue thresholds
  • You have clear, supportable R&D projects and activities
  • The financial net benefit outweighs the cost

It may not make sense if:

• • Ownership or entity changes significantly reduce your actual benefit
  • Amendment and R&D fees outweigh your benefit
  • You lack proper documentation for prior years to support R&D activities

We’re Here to Help

This is a time-sensitive opportunity, and you don’t have much time to act. If you’re considering amending your returns, the next step is not just asking “How much can the company get?” but asking “Is this valuable and worth it for my company?”

The qualified R&D tax credit professionals at JLK Rosenberger can help you accurately navigate the complex regulations governing these credits. They stay up to date with the rapidly changing tax laws, prepare the required Election Statements properly, and assist in the facilitation of refund claims, which now require additional disclosures.

If you have questions about the R&D tax credit or need assistance in determining whether you qualify or if amending is in your best interest, JLK Rosenberger can help. For additional information, please call 949-860-9902, or click here to contact us. We look forward to speaking with you soon.