A common question from manufacturers is whether drying and curing process development can qualify as research and development for the federal R&D tax credit under Section 41. The short answer is that drying and curing process development may constitute qualified research when the work evaluates alternatives to resolve a technical uncertainty about drying or curing performance. Routine drying using established profiles generally is not qualified research. This page explains the framework in general terms. It is educational and is not individualized advice. For the foundational framework, see our page on qualified research.
When Drying and Curing Development May Warrant Review
Drying and curing process development may warrant review when the work involves a genuine technical uncertainty and a process of experimentation. Under the four-part test, the work must be for a permitted purpose, be technological in nature, be intended to eliminate uncertainty, and be conducted through a process of experimentation.
Common scenarios that may warrant review include:
- New coating curing — evaluating alternative curing profiles to resolve uncertainty about whether a new coating can achieve the required properties.
- New material drying — testing alternative drying approaches to resolve uncertainty about whether a new material can be dried without defects.
- New process — evaluating alternative drying or curing approaches to resolve uncertainty about whether a new process can achieve the required performance.
- Energy optimization — testing alternative approaches to resolve uncertainty about whether energy use can be reduced while maintaining quality.
Routine Drying vs. Process Development
A central distinction is between routine drying and process development:
- Routine drying — drying or curing using established profiles and known parameters for a known material. There is no technical uncertainty. This is production, not research.
- Process development — developing new drying or curing approaches where there is a technical uncertainty about whether the process can achieve the required performance. This may warrant review.
Hypothetical Example
Consider a manufacturer that is developing a curing process for a new coating and is uncertain whether any available temperature and time combination can achieve the required hardness without cracking. The company evaluates alternative curing profiles, tests each, and systematically varies the approach to resolve the uncertainty. This may warrant review as qualified research.
By contrast, if the same manufacturer cures a known coating using an established profile, that is routine production, not research.
This example is illustrative only and does not state that the activity definitely qualifies.
Documentation That May Help
Records that can help support drying and curing development claims include process development records identifying the uncertainty and alternative profiles, property test results, and records of how results informed process decisions. For more, see our page on R&D tax credit documentation.
Key Takeaway
Drying and curing process development may constitute qualified research when the work evaluates alternatives to resolve a technical uncertainty about drying or curing performance. Routine drying using established profiles generally is not qualified research. Because the distinction is fact-specific, professional review is appropriate before claiming the credit.