OHIP Billing Optimization and Tax Planning for Ontario Physicians

Two Different Problems: Earning It and Keeping It

Most physicians lose money in two separate places. The first is at the billing end, services rendered but never billed, claims rejected and never resubmitted, the wrong fee code chosen, premiums and special visit codes missed. The second is at the tax end, paying personal top-rate tax on income that could have been deferred in a corporation, or drawing compensation in a way that wastes RRSP room and tax brackets. Our healthcare accounting practice works on both ends for doctors. These are the levers that matter.

1. Bill completely and accurately. Every eligible service, the correct fee code, and the premiums and special visit codes you are entitled to, billed on time within OHIP's stale-dating window.
2. Reconcile your remittance advices. Match what OHIP paid against what you billed every cycle, so rejections and under-payments are caught and corrected, not lost.
3. Recover rejected and aged claims. Investigate error codes, fix and resubmit, and chase claims before they age out. Rejected claims are earned income, not write-offs.
4. Incorporate when the numbers support it. A medical professional corporation defers tax on income left in the company at the low corporate rate, the single biggest tax lever for a higher-earning physician.
5. Get the compensation mix right. Salary versus dividends, set each year to balance RRSP room, CPP, and the cash you actually need personally.
6. Claim every legitimate deduction. CMPA dues, college and licensing fees, CME, equipment, a home office where it qualifies, and practice expenses, all captured rather than missed.
7. Plan the draw, not just the year. Time how much you take out of the corporation across years to smooth personal tax and use lower-income years.

1. Complete, Accurate OHIP Billing

The foundation of optimization is simply billing everything you have earned, correctly. In a busy practice it is easy to miss eligible services, choose a lower fee code than the encounter supports, or overlook premiums and special visit codes you are entitled to. Optimization here does not mean billing for anything you did not do, it means ensuring the record reflects the care actually provided. Billing within OHIP's submission deadlines matters too: claims submitted after the stale-dating window are generally lost.

2. Reconciling Remittance Advices

OHIP pays on a monthly cycle and reports back on a remittance advice (RA) showing what was paid, reduced or rejected. The single most common way physicians lose earned income is by never reconciling the RA against what they billed. Rejections carry explanatory error codes, many of which are fixable and resubmittable, but only if someone is reading them. Reconciling every cycle turns rejected claims back into paid income.

3. Recovering Rejected and Aged Claims

A rejected claim is not a lost claim until it ages out. Most rejections come from correctable issues, eligibility, a coding mismatch, a missing referral, that can be fixed and resubmitted. The discipline of working the rejection report each cycle, rather than letting claims sit, is where real recovered dollars come from. This is operational billing hygiene, and it directly increases the income that then flows into your tax planning.

4. Incorporation: The Biggest Tax Lever

Once the billing is clean, the income has to be protected from unnecessary tax. For a higher-earning physician, the largest lever is a medical professional corporation. Active medical income left in the corporation is taxed at the low combined Ontario small-business rate rather than your personal top rate, which defers a large amount of tax until you draw the money out. The corporation does not erase tax, it defers it and gives you control over the timing, which is exactly what makes it powerful for a doctor with income beyond personal needs.

5. Salary, Dividends, and the Compensation Mix

Once incorporated, how you pay yourself matters as much as how much. Salary generates RRSP room and CPP contributions and is deductible to the corporation; dividends are simpler and avoid CPP but build no RRSP room. Most physicians use a blend, set each year to the income they actually need and their longer-term retirement plan. There is no single right answer, which is why the mix is reviewed annually rather than set once.

6. Deductions Physicians Routinely Miss

Physicians leave deductions on the table more than almost any professional group, usually because the practice is busy and the records are scattered. CMPA dues, CPSO and licensing fees, continuing medical education, professional memberships, medical equipment, a qualifying home office for the administrative side of the practice, and a long list of practice expenses are all deductible when properly documented. Capturing them is straightforward with healthcare-specific bookkeeping and meaningful at year-end.

A Simple Worked Example

Consider a physician billing $450,000 of OHIP income who needs $190,000 personally:

Unincorporated, the full $450,000 is taxed personally this year. Incorporated, only the $190,000 drawn is taxed at personal rates now, and the remaining $260,000 stays in the corporation taxed at the low active rate, available to invest or to draw in future lower-income years. The benefit is deferral and control, and it compounds year after year. This is the heart of corporate tax planning for doctors, and it only works once the billing side is capturing the full income in the first place.