This, from the guidelines above:
What is the de minimis safe harbor election?
Under the final tangibles regulations, you may elect to apply a de minimis safe harbor to amounts paid to acquire or produce tangible property to the extent such amounts are deducted by you for financial accounting purposes or in keeping your books and records. If you have an applicable financial statement (AFS), you may use this safe harbor to deduct amounts paid for tangible property up to $5,000 per invoice or item (as substantiated by invoice). If you don't have an AFS, you may use the safe harbor to deduct amounts up to $2,500 ($500 prior to 1-1-2016) per invoice or item (as substantiated by invoice).
