When I purchase small supplies on a credit card do I put it as an expense when I purchase it and just add the interest as an expense each month?

[Anonymous]

yes when you put them on your credit  card.   if you card is used only for business purposes all the interest is deductible.     if not then post back. 

[MinhT1 · Accepted solution]

When you pay a business expense by credit card, the business expense is considered paid on the day of purchase. In your case, the small supplies can be claimed when you purchase them.

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If you use your credit card only for your business, any interest is also deductible.