Tax Planning
Small Business Research & Experimental (R&E) Rules: Leveraging Retroactive Relief
New domestic R&E rules under the One, Big, Beautiful Bill offer small businesses chances to retroactively adjust past deductions—with key deadlines coming up.
By NomadicTax Research Team • 5-8 min read • June 27, 2026
## What are the revised R&E expense rules?
Under the *One, Big, Beautiful Bill Act*, changes were made to how both domestic and foreign **Research & Experimental (R&E) expenses** are treated—expanding options for small businesses to make retroactive elections, amend returns, and adjust accounting methods. ([taxpayeradvocate.irs.gov](https://www.taxpayeradvocate.irs.gov/news/tax-tips/small-businesses-understand-new-research-expense-rules-and-a-july-6-filing-deadline/2026/06/?utm_source=openai))
## Who qualifies?
- Businesses that are **not tax shelters** per IRC § 448(d)(3).
- Those meeting the **gross receipts requirement** under IRC § 448(c). ([taxpayeradvocate.irs.gov](https://www.taxpayeradvocate.irs.gov/news/tax-tips/small-businesses-understand-new-research-expense-rules-and-a-july-6-filing-deadline/2026/06/?utm_source=openai))
- Specifically for domestic R&E expenses attributed to tax years **after December 31, 2021 and before January 1, 2025**, which previously did not benefit from fully expensing or had different capitalizing requirements. ([taxpayeradvocate.irs.gov](https://www.taxpayeradvocate.irs.gov/news/tax-tips/small-businesses-understand-new-research-expense-rules-and-a-july-6-filing-deadline/2026/06/?utm_source=openai))
## Deadline and actions required
- The **deadline for retroactive election** is **July 6, 2026**, or earlier if your normal refund claim deadline under IRC § 6511 precedes it. ([taxpayeradvocate.irs.gov](https://www.taxpayeradvocate.irs.gov/news/tax-tips/small-businesses-understand-new-research-expense-rules-and-a-july-6-filing-deadline/2026/06/?utm_source=openai))
- To claim relief for eligible prior years, file **amended returns** or **Administrative Adjustment Requests (AARs)** and/or request **accounting method changes**. Documentation of R&E tasks and expenses is essential. ([taxpayeradvocate.irs.gov](https://www.taxpayeradvocate.irs.gov/news/tax-tips/small-businesses-understand-new-research-expense-rules-and-a-july-6-filing-deadline/2026/06/?utm_source=openai))
## Practical example
> Jane Co., a small tech start-up, incurred $50,000 in domestic R&E expenses in 2022. Under previous rules, these were amortized. With the changes, if Jane Co. meets eligibility, it can elect to treat them under the new law—and may amend its 2022 return by July 6, 2026—to expense a larger portion.
## Key tips for compliance and planning
- Review all R&E activities between **2022–2024** and identify if they qualify for retroactive relief.
- Examine whether amended returns or AARs are practical given cost, administrative burden, and potential tax savings.
- Maintain detailed documentation—even for past years—showing expense categories, research processes, payments, contracts.
- Ensure that the business is not disqualified under “tax shelter” rules; consult a tax professional as required.
## What this means long-term
- Businesses may adjust estimates for tax liability for prior years under audit or examination for greater deductions.
- Recordkeeping for R&E will become more critical, especially cross-referencing eligible expenses under new statutory definitions.
- For planning: R&E activities currently underway may now aim for upfront deduction eligibility or streamlined amortization under new framework.