General information only — not financial advice for your situation.
This is a learning tool. Always check CRA My Account records and talk to a qualified professional for your own numbers.
Plain English
When you earn over $258K, the government takes more than half of every extra dollar. An RRSP puts that money beyond the government's reach — for now. You get an instant refund of over 50 cents per dollar, which is massive. Max out your RRSP first ($33,810), then fill your TFSA ($7,000), then your FHSA if you qualify ($8,000). Whatever's left over goes into a regular investment account, where you should focus on Canadian stocks that pay eligible dividends (lower tax rate) and investments that grow through capital gains (only 50% taxable).
You earn $300,000 in Ontario. Contributing the full $33,810 to your RRSP at a 53.53% combined rate saves you $18,098 in tax — that's cash back in your pocket. Add $7,000 to your TFSA for permanent tax-free growth. That's $40,810 sheltered annually before touching non-registered accounts.
Show the analysis
The top federal bracket (33% on income above $258,482) combined with Ontario's 13.16% rate plus the full surtax mechanism produces a combined marginal rate of approximately 53.53%. At this rate, the RRSP's deduction generates $0.5353 of immediate tax relief per dollar. The 2026 RRSP maximum deduction limit (generated from 2026 earned income, usable in 2027) is $33,810. Even if retirement withdrawal occurs at 43%, the positive arbitrage is still over 10 percentage points per dollar contributed. Non-registered overflow should prioritize eligible dividends (which benefit from the dividend tax credit, producing effective rates as low as 39% at these brackets) and capital gains (50% inclusion rate).
Income: $300,000 (Ontario). Max RRSP: $33,810 × 53.53% = $18,098 immediate refund. If retirement withdrawal at 31.48% combined rate: tax on $33,810 = $10,644. Net lifetime gain from tax arbitrage alone: $18,098 − $10,644 = $7,454, plus 20+ years of tax-sheltered compounding on the full $33,810.
Edge cases
- The federal BPA is fully clawed back to the minimum $14,829 at income above $258,482 — this slightly increases the effective marginal rate in the phase-out zone.
- If compensated via dividends from a CCPC rather than salary, no RRSP earned-income is generated — requiring corporate retention strategies instead.
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About this site
Every number on this site is sourced from CRA publications, the Income Tax Act, or provincial fiscal releases. We show the math, cite the sources, and never tell you what to do with your money.