Is marketing tax deductible for a small business?
Advertising is on the IRS's list of expenses a business may be able to deduct, as long as it passes the general test that a business expense must be both ordinary and necessary. The IRS also lists entertainment, charitable contributions and club dues among things you usually can't deduct as business expenses, and the personal part of a mixed expense is generally not deductible. Keep a record of every marketing cost and ask your tax preparer about your case. This is a plain summary, not legal advice.
What the IRS guide says
The IRS's Tax Guide for Small Business (Publication 334, for 2025 returns) is written for individuals who file Schedule C, such as sole proprietors. It says that to be deductible, a business expense must be both ordinary and necessary. An ordinary expense is "common and accepted in your field of business"; a necessary one is "helpful and appropriate for your business", and need not be indispensable.
Advertising appears in the guide's list of other expenses you may also be able to deduct. Older articles often point to Publication 535; the IRS says it has discontinued that publication, whose last revision was for 2022, and maps its topics to other resources.
This is a plain summary, not legal advice. It covers the guide for Schedule C filers only.
What owners often mix up
- Entertainment: the guide lists entertainment expenses among things you usually can't deduct as business expenses.
- Meals: it says deductions for business meals generally remain limited to 50%.
- Charitable contributions: they are on the same can't-deduct-as-a-business-expense list, so ask your preparer how a payment to a school team, charity or event is treated before you assume it is advertising.
- Memberships: the guide lists donations to business organizations among expenses you may be able to deduct, and dues to clubs, including business and social clubs, among those you usually can't. Which side a membership falls on is a question for your preparer.
- Gifts: the guide lists Publication 463, Travel, Gift, and Car Expenses, among its useful items; gifts are not covered here.
- Mixed use: the guide says to separate the personal part of an expense from the business part, and that the personal part is generally not deductible.
Keep a record per channel
As general advice, keep every invoice and receipt for marketing, and label each with the channel it paid for: search, AI answer, social, referral, paid, email, campaign or direct. The same labels in your lead records let you see what each channel cost per job won, which helps at tax time and when you decide what to keep. The guide points to Publication 583, Starting a Business and Keeping Records, for record keeping.
Deductible is not the same as worth it
In general, a deduction lowers the income your tax is figured on; it does not give back what you spent. A campaign that brings no jobs is still a loss after the deduction, so judge marketing by the work it wins, as the related answer on whether your marketing is working describes, and ask your tax preparer about anything specific to your business.
Sources
- Internal Revenue Service, "Publication 334 (2025), Tax Guide for Small Business (For Individuals Who Use Schedule C)"
- Internal Revenue Service, "Guide to business expense resources"
Related answers
- How do you know if your marketing is working?
- How should a small business decide how much to spend on marketing?
- How do you work out what a customer is worth to your business?
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