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The Global Insight

What are incidental materials and supplies?

Author

Robert Miller

Updated on March 07, 2026

“Incidental” materials and supplies are personal property items that are carried on hand and for which no record of consumption is kept or for which beginning and ending inventories are not taken. In other words, these are inexpensive items not worth keeping track of.

What is incidental inventory?

Incidental materials and supplies include items, such as pens, paper clips, rubber bands, etc. Generally, no record of consumption is kept, nor is a physical inventory taken either at the beginning or end of the year for Incidental materials and supplies.

Can inventory costs be claimed as non-incidental materials and supplies?

“In the first year of applying this new law inventory deduction, this change can result in major tax savings for retailers.” “The TCJA allows small businesses to treat inventory as ‘non-incidental materials and supplies,’ the cost of which can be deducted when paid,” Wheelwright explained.

What are incidental items?

Incidental expenses, also known as incidentals, are gratuities and other minor fees or costs incurred in addition to the main service, item, or event paid for during business activities. Incidental expenses ancillary to the costs of transportation, meals, and lodging are common when an employee travels for business.

Can you sell written off inventory?

There is no rule that says a company can’t later use or sell inventory that has been written off. A company generally cannot take a current tax deduction for inventory that has been written off if it’s still on hand.

Can I use cash basis if I have inventory?

Inventory, including purchases and sales, must be treated on accrual-basis, but all other expenses and income may be considered under the cash method. If a business chooses to use the cash method for calculating income, however, then it must also use cash-basis for expenses.

When to write off inventory as non-incidental materials and supplies?

Non-Incidental Materials and Supplies. Treating inventory as non-incidental materials and supplies means that you can deduct your cost at the later of: when you bought the product or when it’s used or consumed. This is the exact opposite of *incidental* materials and supplies which allows you to write everything off immediately.

What are non incidental materials and supplies ( NIMS )?

Incidental materials and supplies are things that you buy and don’t keep track of. You can expense them when you pay for them if you are on the cash basis or when you incur the obligation if you are on the accrual basis. Non-incidental materials and supplies (NIMS) are stuff other than inventory that you keep track of.

How are inventoriable items treated as nonincidental materials?

A qualifying taxpayer must have average annual receipts of $1 million or less and must treat its merchandise inventory in the same manner as a nonincidental material or supply. For such merchandise inventory, the uniform capitalization rules under IRC section 263A do not apply.

Can a non-incidental supply be treated as cash basis?

What you mean is cash basis for inventory. Treating it as non-incidental supplies wouldn’t have the same effect. According to TCJA, if your method of accounting does not use inventory (aka cash basis inventory), than you can use the same treatment on your taxes. Reply