What incorporation changes, and what it leaves alone
Start with the non-events. The HST exemption on music instruction belongs to the supply, not the supplier, so an incorporated school charges a family exactly what a sole proprietor charged, and the 13% baked into teaching-room costs stays baked in, because no structure turns exempt-side tax into a credit. Teacher classification questions do not go away either; the corporation inherits them.
What does move is everything an owner actually worries about: the rate on profit the school keeps, whose assets stand behind a claim, how family can be paid, and what a sale could look like years from now.
| The question | After incorporation |
|---|---|
| What families pay for lessons | Unchanged; instruction in music stays HST-exempt from any supplier |
| The 13% inside teaching-side costs | Unchanged; exempt revenue still blocks those credits |
| Tax on profit kept in the school | About 12.2% combined on the first $500,000 of active income |
| A claim that outruns insurance | Meets the corporation's assets before your family's |
| Paying a spouse or adult child | Possible, governed by TOSI and by what the work is genuinely worth |
| Selling the school one day | A share sale can reach the $1.25 million lifetime capital gains exemption |
The honest arithmetic at teaching income
Ontario's small-business rate is an advantage only on profit that stays inside the corporation. The tax system is built to integrate: money paid out to live on lands near your personal rate whichever route it takes, so an owner who drains the account every month buys a T2 return, a minute book and a second set of books while saving very little.
The case appears with retention. A school that ends its year with profit still inside, earmarked for rental-fleet stock, for soundproofing another teaching room, or simply for carrying July and August payroll, pays the low corporate rate on that profit and keeps the deferral working. The wider the gap between what the school earns and what the household needs, the stronger the case; that gap is the whole test, and it beats any revenue milestone.
For a private teacher renting a room by the hour, the honest answer is often not yet. A T2125 on the personal return carries the practice, and CPA Quick Support at $99 a month keeps a CPA on call for the deduction, instalment and CRA-letter questions a solo teaching practice actually generates.
Paying the owner who is also the busiest teacher
In most schools the owner carries the heaviest roster, and a corporation turns that work into a real payroll decision. A salary for your teaching and admin hours is deductible to the corporation, builds RRSP room and keeps CPP accruing; it also makes the management numbers honest, because a school where the owner's hours cost nothing on paper believes every program is profitable. The corporation runs source deductions on that salary like any employer would.
Profit above your wage is a separate decision, salary top-up, dividend or retention, made with the year's results in hand. Tuning that mix year by year is Tax Planning & Advisory territory; incorporation is simply what puts the choice on the table.
Family in the school, inside the TOSI rules
The tax on split income hits dividends paid to a family member at the top personal rate unless an exclusion applies, and the exclusions reward work, not shareholding. A reasonable salary for genuine work, the spouse who runs the front desk, the billing and the make-up calendar, stands on its own and never needed TOSI's permission. Dividends need more: the family member is generally protected where they are actively engaged in the business on a regular basis, which the rules read as an average of about 20 hours a week, in the current year or any five earlier ones. An adult child teaching a full roster can meet that; a relative who only holds shares cannot.
One trap worth naming: the excluded-shares route around TOSI is generally closed to businesses earning their income from services, which is what a school does, so the working test is the work itself. We design the share classes on day one with that in mind, instead of unwinding a hopeful structure after a review letter arrives.
A clean switch, made between terms
The mechanics take days, not months: articles filed for an Ontario corporation, a name search behind the school's name, share classes that anticipate the family plan above, then registrations in the right order, business number first, a payroll account before the first pay run, and an HST account only if the rental or retail counter requires one, because the lessons never will. An operating school moves its instruments, equipment and goodwill in under a section 85 rollover so the transfer itself triggers no tax, and enrolment agreements and pre-authorized payments are re-papered in the corporate name.
Time the switch for the gap between the spring recital and fall registration, so one corporation owns an entire teaching year from its first September. Our Incorporation engagement runs the sequence start to finish for schools across Mississauga and the GTA, with the fee quoted in writing after a free 15-minute discovery call.
