For most coaches, 25% to 30% of net coaching income is the right set-aside, and it should come out of every payout the day it lands. The exact number depends on your bracket and your state, but the floor is higher than most new coaches expect, because self-employment tax applies before income tax even starts.
The 25% to 30% set-aside that covers most coaches
Start with what is certain: 15.3% self-employment tax applies to your net profit regardless of how low your income is, once net earnings pass $400 for the year. Federal income tax stacks on top at your marginal rate. A coach with modest profit and the standard deduction might owe little income tax, so a 25% set-aside covers them comfortably. A coach clearing strong six-figure profit is layering a significant income tax rate on top of the 15.3%, and 30% to 35% is more realistic. Add your state: coaches in states with no income tax can hold the lower end, while a coach in a high-tax state should add several points.
Two built-in breaks soften the total. Half of your self-employment tax is deductible against income tax, and the qualified business income deduction can trim up to 20% off the taxable coaching profit for many coaches, subject to income limits. These are reasons the right number is 25% to 30% rather than 40%, but they are trued up on the return, not reasons to skip saving.
Why the rate climbs with your coaching income
Percent-of-income rules feel unfair at first because tax is progressive: the first dollars of profit are taxed lightly, the last dollars at your top bracket. As coaching revenue grows, each additional client's fee is taxed at your highest combined rate, so the blended percentage you need to save drifts upward. A practical calibration: after your first full year, divide your actual total tax by your actual net profit. That personal effective rate, plus a small cushion, is a better target than any generic figure, and rechecking it each year keeps the target honest as your income and write-offs change.
Remember the percentage applies to net income, revenue minus real expenses, which is why tracking certifications, gym rental, equipment, insurance, and software all year quietly lowers the amount you need to save.
A separate tax account beats mental math
The system that works is boring: a dedicated savings account that only holds tax money. Every time a payout lands from an app, a gym, or a client, transfer your percentage the same day. Then pay quarterly estimates from that account with Form 1040-ES on Apr 15, Jun 15, Sep 15, and Jan 15, since coaches expecting to owe $1,000 or more for the year are expected to pay as they go. If you saved slightly too much, April brings a refund from yourself. If your books show a slow quarter, send the smaller correct amount rather than skipping. Coaches get into tax trouble not because the math is hard but because the money was spent by the time the bill arrived; the transfer habit removes that possibility.