From summer weekends to full time: Brian's tennis coaching business

A network, not an ad budget

Brian played tennis in high school and again in college. That produced something more durable than a trophy shelf: a network of athletes at every age — juniors whose parents want structured coaching, adults returning to the game, competitive players who need a hitting partner who can push them.

He never had to market. Referrals came from people who had already seen him play. That is the pattern behind most coaching businesses that work, and it is why they scale faster than the owner's bookkeeping does.

Summer weekends stopped being enough

It began as summer weekend lessons around a W-2 job. Then weekday evenings. Then a waitlist. At some point he was turning away paying work in order to keep a job that paid less per hour than his lessons did.

That is the moment people call us — and it is also the moment where the wrong decision is expensive in both directions. Quitting too early means losing the cushion. Waiting too long means capping the business.

Mapping the accounting year over year

One good July proves nothing. We built out his numbers across multiple years so the seasonality was visible: what a summer actually contributes, how thin winter runs indoors, whether the trend line is genuinely climbing or just repeating.

With the years side by side, the transition stopped being a leap of faith. He could see the floor — the amount the business produces even in a weak stretch — and compare it against what he actually needs to live on.

What changes when the W-2 ends

Withholding disappears. Coaching income is Schedule C, so income tax and self-employment tax get paid in through quarterly estimates that Brian now has to fund himself.

Deductible costs are real: court and facility fees, equipment and stringing, mileage to lessons and tournaments, certifications and continuing education, liability insurance, scheduling and payment fees. Health coverage and retirement move onto his plate too — and self-employment opens retirement options that can shelter meaningfully more than a typical employee plan.

Why it worked

Nothing here was exotic. He had the skill and the network already. What he didn't have was a picture of his own business accurate enough to make a decision with. Building that picture year over year is the whole job.