09/09/2026
Two incorporated doctors. Same income. Same savings rate.
One put $30K into her RRSP.
One left it in the corp.
Ten years later, the difference was $180K in after-tax wealth. Here's the part your advisor probably skipped:
Neither of them was wrong going in.
The answer depends on numbers only one of them ran.
The RRSP-vs-corp decision is the most oversimplified question in Canadian wealth planning. Advisors handing out a universal answer haven't done the math on your specific situation.
Here's the framework I walk clients through:
1. Your personal marginal tax rate now vs. at retirement.
If you're pulling a T4 salary at the top bracket now and expect to draw income at a lower bracket later, the RRSP deduction is worth real money. If you're already paying yourself dividends and plan to keep doing so, the math shifts.
2. How much active business income your CCPC earns.
The small business deduction gives you a low corporate rate on the first $500K of active income. Passive investment income above $50K per year inside the corp starts grinding that limit down. That grind is invisible until you see it on the tax return.
3. Your RRSP room and what created it.
RRSP room only accumulates from T4 salary or bonuses. If you've been paying yourself dividends for years to save on CPP, your room is thin. That's a choice with a cost you don't feel until you try to catch up at 55.
4. What you actually want the money to do.
Corporate savings can fund a buy-sell, an insured retirement plan, or an estate freeze. RRSP savings can't. If the money has a job beyond retirement income, that changes where it should live.
5. The order of withdrawal at retirement.
Two clients can end up with the same portfolio value at 65 and pay a $200K+ difference in lifetime tax depending on the order they draw from RRSP, TFSA, corp, and non-registered accounts.
The doctor who ended up $180K ahead didn't pick the "right" account.
She ran the numbers with someone who understood both sides.
If your advisor's answer to the RRSP-vs-corp question took less than an hour, you got an opinion, not a plan.