What Is the R&D Tax Credit?
The federal R&D Tax Credit, formally known as the Credit for Increasing Research Activities under IRC Section 41, was established in 1981 and made permanent in 2015. It provides a dollar-for-dollar reduction in federal tax liability for businesses that incur qualified research expenses (QREs).
Unlike a deduction, which reduces taxable income, a tax credit directly reduces the taxes you owe. That distinction makes the R&D credit one of the most impactful line items available on a corporate or pass-through return.
Who Qualifies?
A common misconception is that the R&D credit is reserved for large tech companies or pharmaceutical firms with dedicated lab facilities. In reality, businesses across a wide range of industries qualify, often without realizing it. Eligible sectors include:
- Manufacturing and industrial engineering
- Software development and technology
- Architecture, engineering, and construction
- Food and beverage product development
- Agriculture and chemical innovation
- Energy and environmental technology
- Medical devices and life sciences
The key is not the industry itself, but whether the work performed meets the IRS’s four-part test for qualified research.
The Four-Part Test
For an activity to qualify under Section 41, it must satisfy all four of the following criteria:
1. Business Component: The research must relate to the development or improvement of a product, process, technique, formula, invention, or software.
2. Technological Uncertainty: The work must be intended to discover information that eliminates technical uncertainty about the development or improvement.
3. Process of Experimentation: The taxpayer must evaluate alternatives through modeling, simulation, systematic trial and error, or other experimental methods.
4. Technological in Nature: The activity must rely on principles of engineering, physics, chemistry, biology, or computer science.
How Is the Credit Calculated?
There are two main methods for calculating the federal R&D credit:
Regular Credit Method (RC): Equal to 20% of QREs that exceed a historical base amount. This method generally produces a larger credit but requires historical QRE data going back several years.
Alternative Simplified Credit (ASC): Equal to 14% of QREs that exceed 50% of the average QREs from the prior three tax years. For companies without reliable historical data, the ASC is often the preferred method.
Qualified Research Expenses typically include:
- Wages paid to employees directly engaged in, supervising, or supporting qualified research
- Supplies used in the conduct of qualified research
- 65% of contract research expenses paid to third parties
- Cloud computing costs directly tied to research activity (a more recent addition under IRS guidance)
Federal vs. State: Stacking for Maximum Benefit
The federal credit is just the beginning. Most states with an income tax also offer their own R&D tax credits; and because these credits operate independently, they can often be claimed simultaneously with the federal credit. In high-activity states, this combination can meaningfully amplify the total benefit.
Below is a complete reference for all 50 states.
R&D Tax Credit by State
| State | Credit Available | Rate / Notes |
|---|---|---|
| Alabama | No | No state R&D tax credit |
| Alaska | No | No state income tax; no R&D credit |
| Arizona | Yes | 20% on first $2.5M QREs; 11% on next $2.5M; 24% for businesses with ≤150 employees. Refundable. |
| Arkansas | Yes | 20% on qualified R&D expenditures |
| California | Yes | 15% on first $1M in excess QREs; 24% on amounts over $1M. Refundable option for small businesses. |
| Colorado | No | No state R&D tax credit |
| Connecticut | Yes | 6% of incremental R&D; refundable at 65 cents on the dollar |
| Delaware | Yes | 50% of the allowable federal R&D credit |
| Florida | Yes | Limited credit available; primarily applies to R&D in aerospace, defense, and life sciences |
| Georgia | Yes | 10% of QREs that exceed a base amount; 1% if no increase over prior year |
| Hawaii | Yes | 20% of eligible R&D expenses; capped per taxpayer |
| Idaho | Yes | 5% of qualifying research expenses; conforms closely to federal rules |
| Illinois | No | Credit expired; no currently active state R&D credit |
| Indiana | Yes | 10% credit on QREs; 15% for small businesses |
| Iowa | No | No general state R&D credit (certain targeted incentives may apply) |
| Kansas | No | No state R&D tax credit |
| Kentucky | No | No state R&D tax credit |
| Louisiana | Yes | Tiered rates up to 40% for small businesses; 8% for large corporations on QREs performed in-state |
| Maine | Yes | 5% of eligible research expenses |
| Maryland | Yes | Up to 10% of qualified R&D expenses; small businesses may qualify for refundable portion |
| Massachusetts | Yes | 10% on QREs; one of the most actively used state credits in the country |
| Michigan | No | No state R&D tax credit |
| Minnesota | Yes | 10% on first $2M of QREs; 2.5% on excess. Refundable for some businesses. |
| Mississippi | No | No state R&D tax credit |
| Missouri | No | No state R&D tax credit |
| Montana | No | No state R&D tax credit |
| Nebraska | No | No general state R&D credit |
| Nevada | No | No state income tax; no R&D credit |
| New Hampshire | No | No state income tax on wages; limited business tax with no dedicated R&D credit |
| New Jersey | Yes | 10% of QREs; unused credits may be sold or transferred |
| New Mexico | Yes | 5% credit on qualified R&D; additional credits available in certain zones |
| New York | Yes | 9% on QREs; 6% alternative credit. Empire State R&D credit also available. |
| North Carolina | No | Credit expired; no currently active state R&D credit |
| North Dakota | Yes | 25% on first $100K of QREs; 8% on amounts over $100K |
| Ohio | No | No state R&D tax credit |
| Oklahoma | No | No state R&D tax credit |
| Oregon | No | No state R&D tax credit |
| Pennsylvania | Yes | 10% on QREs; 20% for small businesses. Credits can be sold or transferred. |
| Rhode Island | Yes | 22.5% on first $111,111 of QREs; 16.9% on excess |
| South Carolina | Yes | 5% on qualifying R&D expenses |
| South Dakota | No | No state income tax; no R&D credit |
| Tennessee | No | No state R&D tax credit |
| Texas | No | No state income tax (franchise tax applies); no dedicated R&D credit |
| Utah | Yes | 5% on qualifying R&D expenses |
| Vermont | Yes | 27% of the allowable federal R&D credit |
| Virginia | No | No general state R&D tax credit |
| Washington | No | No state income tax; no R&D credit |
| West Virginia | No | No state R&D tax credit |
| Wisconsin | Yes | 10% on qualifying research expenses; 11.5% for certain businesses |
| Wyoming | No | No state income tax; no R&D credit |
Note: State credit rules are subject to legislative change. Rates, caps, and eligibility requirements should be verified with a qualified tax advisor for the applicable tax year.
Most Active States for R&D Credits
Some states have built particularly robust R&D credit programs; whether through high rates, refundable structures, or transferability provisions that give even pre-revenue companies access to meaningful cash value.
California remains one of the most active R&D credit states in the country, due largely to the concentration of technology, biotech, and manufacturing firms operating there. The tiered rate structure and refundable option for small businesses make it a significant planning opportunity.
Arizona stands out for its favorable treatment of small and mid-size businesses, with rates reaching up to 24% for companies with 150 or fewer employees and a fully refundable credit structure.
Massachusetts is a top-tier state for R&D credits, particularly for life sciences and technology companies. The straightforward 10% rate and broad eligibility have made this credit one of the most consistently claimed in New England.
Louisiana offers some of the highest headline rates in the country, up to 40% for qualifying small businesses, making it a compelling destination for companies with significant in-state R&D activity.
Pennsylvania and New Jersey both allow unused credits to be sold or transferred, which is a particularly valuable provision for startups and early-stage companies that may not yet have sufficient tax liability to absorb the full credit.
Connecticut offers a refundable credit at 65 cents on the dollar, making it one of the few states where a company can receive a cash payment even when no tax is owed, a meaningful benefit for growing companies in high-investment phases.
Rhode Island deserves mention for its generous rate on smaller QRE amounts, 22.5% on the first tier of qualifying expenses, which makes it disproportionately valuable for mid-market companies.
Ready to Explore Your R&D Credit Potential?
If your business is investing in innovation; whether in a lab, on a job site, or inside a software platform; you may be entitled to significant tax savings at both the federal and state level.
Request a free R&D analysis from CSSI today. Our specialists will evaluate your activities, estimate your potential credit, and walk you through the process with no obligation.
