Yes, with one important line drawn by the IRS. Education that maintains or improves skills in the trade you are already in is deductible. Education that qualifies you for a new trade or business is not. For a working personal trainer, most certification spending falls on the deductible side of that line.
NASM, ACE, and CSCS renewals are business expenses
Once you are already coaching clients for money, the costs of staying certified and getting better at the job are ordinary business expenses under IRC Section 162. That covers recertification fees, continuing education credits, specialty certifications that deepen what you already do, exam fees, study materials, and workshop tuition. A trainer adding a nutrition coaching certification, a kettlebell specialty, or a corrective exercise credential is improving skills in an existing business, and those costs are deductible in full the year you pay them.
CPR and first aid renewals required to keep your certification current count too. So do the online course platforms and textbooks you buy specifically to prepare. If a certification requires travel to a testing site or live workshop, the travel can be deductible as well, subject to the normal business travel rules, so keep the itinerary and receipts.
The one certification the IRS will not let you deduct
The cost of becoming a trainer in the first place is generally not deductible, because education that qualifies you for a new trade fails the IRS test. Someone working a desk job who pays for their first personal training certification is buying entry into a new occupation, and that initial certification is treated as a personal expense. The same logic applies later in your career: a trainer who pays for physical therapy school is qualifying for a different licensed profession, and that tuition is not a Schedule C write-off even though the fields overlap.
The practical rule: ask whether the education lets you do your current job better or lets you do a different job. Better at coaching, deductible. Different occupation, not deductible. When a course sits near the line, what matters is your situation at the time you paid, so a trainer already earning coaching income has a much stronger position than someone who has not started.
Where certifications go on your Schedule C
Deduct certification and continuing education costs on Schedule C as business expenses; many coaches list them under other expenses with a plain label like continuing education. The deduction reduces your net profit, which cuts both income tax and the 15.3% self-employment tax, so a $600 recertification really costs you meaningfully less after taxes.
Keep the paper trail simple: the receipt, what the credential was, and a one-line note on how it serves your existing coaching business. Pay from a business account if you have one. If your certifying body publishes a renewal schedule, save it, because it documents that the spending was required to keep working, which is the cleanest possible support for the deduction.