The cost of work clothes is deductible. However, you can't deduct the cost of any garment you can wear outside of work. Unfortunately, off-the-shelf workout clothes can be used when operating your fitness business and when you work out in your spare time, so it's not a commercial expense. In general, any equipment you use exclusively to train customers is tax-deductible.
Check out this list of fitness careers that allow you to follow your dreams, including what it takes to start a career in personal fitness training.
