Why Coaching Income Triggers Self-Employment Tax
If you run your coaching business as a sole proprietor or a single-member LLC that hasn't elected S-corp status, the IRS treats your coaching profit the same way it treats any other self-employment income. There's no carve-out for coaches, whether you sell one-on-one sessions, group programs, or signature courses through Kajabi.
Self-employment tax is 15.3% of your net profit: 12.4% for Social Security (up to an annual wage base limit that adjusts each year) and 2.9% for Medicare (no cap, plus an additional 0.9% Medicare surtax if your income is high enough). You pay this in addition to regular federal income tax, and possibly state income tax, on the same profit.
The key word is net profit, not gross revenue. You calculate it on Schedule C by subtracting business expenses from what clients paid you through Stripe, PayPal, or Kajabi checkout. That net profit number flows to Schedule SE, where the self-employment tax is figured, and also to Form 1040 for income tax.
What Counts as Deductible to Lower That Number
Because self-employment tax hits your net profit, every legitimate business expense you deduct reduces both your income tax and your self-employment tax. For coaches, common deductions include certification renewal fees, continuing education courses, Kajabi or other course-hosting subscriptions, Zoom or scheduling software, a portion of your phone and internet bill, business insurance, and payment processing fees charged by Stripe or PayPal.
Those processing fees matter more than most coaches realize. If a client pays $2,000 for your signature program and Stripe takes $65 in fees, your taxable income is the $2,000 minus that fee and any other program costs, not the full $2,000. Tracking this accurately, especially across multiple platforms, is what determines whether a launch actually made money after everything is accounted for.
Quarterly Payments and the Lumpy Income Problem
Because no employer withholds tax from your coaching income, the IRS expects you to pay both income tax and self-employment tax yourself, in quarterly installments using Form 1040-ES. The deadlines generally fall in mid-April, mid-June, September, and January of the following year.
This is especially tricky for coaches whose income arrives in launch-based bursts rather than steady monthly payments. A $30,000 launch in March followed by a quiet April and May can lead to a big miscalculation if you estimate quarterly payments based on your average month instead of your actual annual pace. Underpaying enough can trigger an IRS penalty for underpayment of estimated tax, even if you pay the full balance by the April filing deadline.
A reasonable approach is to set aside a percentage of every payment you receive, often 25 to 30% for self-employment tax and income tax combined, in a separate account as soon as it clears Stripe or PayPal, rather than waiting until quarter-end to figure out what you owe.
If You've Elected S-Corp Status
Coaches who've elected S-corp taxation handle this differently. You pay yourself a reasonable salary through payroll, which is subject to Social Security and Medicare tax withholding just like any employee's wages, but any remaining profit distributed to you as the owner isn't hit with self-employment tax. This can reduce your overall tax bill once your coaching business is consistently profitable, but it adds payroll complexity and doesn't make sense for every coach, especially those still building toward stable, predictable revenue.