Documenting supplies and materials is a key part of substantiating the supply component of qualified research expenses under Section 41. Under Section 41(b)(2)(C), supplies are tangible property other than land and depreciable property, used in the conduct of qualified research. This page explains how to document supplies in a way that can help support a credit claim. It is educational and is not individualized advice. For the supply framework, see our page on supplies.
What to Document for Supplies
Useful supply documentation may include:
- Materials — what materials were used in the qualified research.
- Prototypes — prototype materials consumed or destroyed in testing.
- Consumables — consumable items used in the conduct of qualified research.
- Project nexus — which specific qualified research projects the materials were used in.
- Purchase records — purchase orders, invoices, and usage records.
- Capital-property distinction — records distinguishing consumed supplies from capital equipment.
Not every item purchased for a project qualifies as a supply. Supplies must be tangible property other than land and depreciable property, used in the conduct of qualified research. For more, see our page on supplies.
The Capital-Property Distinction
A key documentation challenge is distinguishing consumed supplies from capital property. Under Section 41(b)(2)(C)(ii), property of a character subject to the allowance for depreciation is not a supply. Equipment, machinery, and tooling that are capitalized and depreciated are generally not supplies, even if used in a research project. Records that show whether an item was consumed in the research or capitalized as equipment can help support the distinction. For more, see our page on depreciable property vs. supplies.
Prototype Materials
Prototype materials can raise specific questions. Materials consumed in building and testing prototypes may, depending on the facts, be supplies if they are tangible property used in the conduct of qualified research and are not depreciable property. However, prototypes themselves can be capital in nature, and the treatment of prototype costs can depend on whether the prototype is depreciable property, is sold or used after testing, or is otherwise treated as a capital asset. For more, see our page on prototype costs.
Connecting Purchases to Projects
As with other QRE categories, supplies must be connected to qualified research activities and business components. Purchase and use records that tie materials to specific qualified research projects tend to be more useful than generalized allocations. Where materials are used across both qualified research and other activities, an allocation is generally required. For more, see our page on R&D tax credit documentation.
Hypothetical Example
Consider a manufacturer that is developing a new coating and consumes resin, pigments, and solvents in the formulation and testing of alternative coatings. The documentation includes: purchase orders for the materials, usage records showing which materials were used in which test, records connecting the materials to the specific coating development project, and records distinguishing the consumed materials from the capital equipment (mixers, ovens) used in the testing. This documentation can help support the supply component.
By contrast, a record that simply includes the total material purchases for the year, without connecting them to specific qualified research projects, is less useful.
This example is illustrative only.
Documentation That May Help
Records that can help support supply claims include purchase orders, invoices, inventory and usage records, records of which projects and activities the materials were used in, and records distinguishing consumed supplies from capital items. For more, see our page on R&D tax credit documentation.
Key Takeaway
Documenting supplies and materials used in R&D involves recording what materials were used, in which projects, and distinguishing consumed supplies from capital property. Purchase records connected to specific qualified research projects are most useful. Because documentation adequacy is fact-specific, professional review is appropriate.