R&D Tax Credits for Tool And Die Operations
Custom tool and die shops are among the most overlooked beneficiaries of the Research & Development (R&D) Tax Credit under the Internal Revenue Code (IRC) §41. If your shop engineers custom dies, builds specialty fixtures, develops new tooling, or iterates on tight-tolerance processes, your work may qualify for the credit.
The R&D tax credit is a dollar-for-dollar reduction in your federal tax liability, and though many tool and die shops qualify, it’s estimated only 30% of shops claim them.
What is the R&D Tax Credit, and Why Does It Apply to Tool & Die?
The R&D Tax Credit, codified under IRC §41, is a federal incentive that rewards American businesses for investing in the development of new products, processes, techniques, formulas, and software. It was made permanent by Congress in 2015, and it reduces your federal income tax liability dollar-for-dollar.
Many tool and die shops assume that R&D doesn’t apply to them because they’re not performing what many people consider “science.” They aren’t in labs, researching new pharmaceuticals, or creating new AI software. For tool and die shops, this means that engineering and problem-solving that teams do every day may already qualify.
The Four-Part Test: Does Your Work Qualify?
To claim the credit, qualifying activities must satisfy all four criteria of the IRS test under IRC §41(d).
1. Permitted Purpose (the Section 174 Test)
The activity must aim to develop or improve the functionality, performance, reliability, or quality of a new or existing business component, meaning a product, process, technique, formula, or invention. At the outset, there must be objective uncertainty about whether the desired result is achievable.
2. Technological in Nature
The work must fundamentally rely on principles of the physical or biological sciences, engineering, or computer science. For tool and die, this is almost always engineering — mechanics, metallurgy, precision machining, and materials science all qualify.
3. Elimination of Uncertainty
There must be genuine technical uncertainty at the start of the project — uncertainty about whether the approach will work, what design is best, or whether the process can achieve the required result. If your engineers are figuring out how to hold a tolerance that has never been held before, or whether a new material will perform under production stress, that uncertainty qualifies.
4. Process of Experimentation
The firm must engage in a systematic process of testing and evaluating alternatives. This does not require formal lab documentation. Physical prototyping, trial runs, iterative design changes, and CAD revision cycles all satisfy this requirement when performed systematically to evaluate technical alternatives.
What Specifically Qualifies in a Tool and Die Shop?
The day-to-day work of a custom tool and die operation is often well-suited to the R&D tax credit. Some common activities being performed and frequently qualify include:
- Designing and building custom dies for new part geometries or tighter tolerances.
- Development new or improved fixtures and jigs for first-time part configurations.
- Engineering prototype tooling to eliminate defects, cracking, warping, or springback.
- Testing new materials, including tool steels, coatings, and inserts, for improved performance or wear resistance.
- Developing novel machining processes or parameters to achieve specifications not previously achievable.
- Designing custom specialty machinery or automation for unique production requirements.
- Engineering solutions for tight-tolerance challenges that have no off-the-shelf answers.
It should be noted that not all activities qualify for the R&D tax credit. Routine production runs using already established processes, standard maintenance, and repeat orders built to previously proven specs are generally excluded. The credit applies to work where your team is solving a technical problem, not executing a known solution.
What Expenses Can Be Claimed?
Three categories of expenses qualify as Qualified Research Expenditures (QREs) under the IRC §41(b).
1. Wages: W-2 wages paid to employees who perform, directly supervise, or directly support qualifying research activities. This includes engineers, machinists, and skilled tradespeople spending time on qualifying projects.
2. Supplies: Tangible property, including raw materials, test materials, and prototype components, consumed or used in the conduct of qualifying research.
3. Contract Research: 65% of amounts paid to third-party contractors for qualified research performed on your behalf [IRC §41(b)(3)].
The credit itself is calculated using one of two methods. The Alternative Simplified Credit (ASC) is the most commonly used method for manufacturers. It equals 14% of QREs above 50% of the average QREs from the previous three tax years. In practice, most shops see an effective rate of roughly 6-8% of total qualified wages and supply expenses. For a shop with $3,000,000 in qualifying payroll and material, that means they may be able to claim between $180,000 and $240,000 annually from the federal credit, and there may be applicable state R&D tax credits that can stack on top.
Documentation: What You Need to Claim
Documentation does not need to be extensive or overly scientific. While the IRS does require documentation to prove the R&D activities do in fact qualify, many notes can be compiled in a well-defensible claim with the help of a qualified, experienced R&D tax attorney, CPA, or consultant.
For tool and die shops, supporting documentation may include:
- Job travelers and shop orders for custom projects.
- CAD revision logs and engineering change orders.
- First-article inspection reports and test results.
- Time records or reasonable estimates of employee hours on qualifying projects.
- Notes on technical challenges encountered and how they were resolved.
Again, it’s important to note that while proper documentation is essential, an experienced company like RK Partners can help compile the notes and records you’ve been keeping.
Can You Claim Credits for Prior Years?
If your shop has been performing qualifying work for years without claiming the R&D credit, which is common, you may still be able to recover those credits. The IRS generally permits amended returns for the three prior open tax years.
Additionally, if your business has average annual gross receipts of $31 million or less, the One Big Beautiful Bill Act (OBBBA) introduced IRC §174A, which reinstated immediate expensing for domestic R&E expenses. Qualifying small business may be eligible to retroactively apply this relief for tax years 2022-2024 by filing amended returns. It’s important to note that the filing deadline for this election is July 6, 2026 (or the applicable statute of limitations, whichever comes first). It’s imperative that you inquire about your R&D tax credit potential as soon as possible to avoid leaving money on the table.
What RK Partners Can Do for Your Shop
RK Partners is a uniquely niche firm dedicated exclusively to R&D tax credits. We work with custom manufacturers, tool and die shops, and precision machining operations to identify qualifying activities, document claims properly, and maximize the credits your company is entitled to.
We have a 100% success rate and have not only found R&D credits for companies who didn’t know they would qualify, but also have found additional credits for businesses that had a consultant review their options.
Our team of tax attorneys, CPAs, and consultants will walk you through the four-part test, help you identify qualifying projects, and make sure your documentation is ready to stand up to IRS scrutiny. Contact us today for a risk-free consultation.
