A 100 percent tax deduction is a business expense of which you can claim 100 percent on your income taxes. For small businesses, some of the expenses that are 100 percent deductible include the following:
Furniture purchased entirely for office use is 100 percent deductible in the year of purchase.
Office equipment, such as computers, printers and scanners are 100 percent deductible.
Business travel and its associated costs, like car rentals, hotels, etc. is 100 percent deductible.
Gifts to clients and employees are 100 percent deductible, up to $25 per person per year.
If you’re self-employed and pay your own health premiums, you can deduct those at 100 percent.
Your annual business phone bills are 100% deductible.