The question of whether to prioritize RRSP or TFSA contributions is one we address in every tax optimization seminar. While the simplified advice "use RRSP if your tax rate will be lower in retirement" is directionally correct, it obscures critical nuances that can cost Ontario professionals thousands of dollars over a career.
Ontario's combined federal-provincial marginal tax rates create distinct brackets that significantly impact the RRSP decision. At $55,867 (2025), the marginal rate jumps from 20.5% to 29.32%. At $100,392, it increases to 31.48%. These breakpoints create clear zones where RRSP contributions generate disproportionate value.
Our three-factor model considers: (1) Current marginal tax rate vs. expected retirement rate, (2) Available TFSA room as a limited-supply resource, and (3) Income-tested benefits that RRSP income may claw back in retirement (OAS, GIS). For most Ontario professionals earning between $60,000 and $150,000, the optimal strategy is a split allocation rather than an either/or decision.
For a professional earning $95,000 gross: Contribute to RRSP until income reaches the lower bracket boundary ($55,867), then direct remaining savings to TFSA. This generates the maximum tax refund while preserving TFSA room for tax-free growth. The refund should be reinvested — ideally into the TFSA — creating a compound advantage over time.
The most expensive error we see: contributing to RRSP in a low-income year when TFSA would have been more efficient. The second: withdrawing from RRSP before retirement for non-emergency purposes, triggering full taxation plus loss of contribution room permanently. Third: ignoring the RRSP HBP (Home Buyers' Plan) as a strategic tool for first-time home purchasers.
Join our free Canadian Tax Optimization seminar for a personalized analysis of your situation.