Canada taxes income progressively โ the more you earn in a year, the higher your marginal rate. Every dollar you draw from RRSP counts as income and pushes you up the brackets. TFSA draws are invisible to the CRA โ they don't count as income at all, so they never raise your tax rate, never trigger OAS clawback, and never affect income-tested benefits like GIS.
The goal: keep your taxable income as low as possible each year by using TFSA first. This stretches your RRSP and lets the registered accounts keep growing tax-sheltered longer.
โ ๏ธ OAS Clawback
If your total income exceeds ~$90,997/yr (2024), the government claws back 15ยข of OAS for every dollar above that threshold. At ~$148K income, your entire OAS is eliminated. Large RRSP draws are the most common cause. TFSA draws never count toward this threshold.
โ ๏ธ RRSP Overtaxation
RRSP must convert to RRIF by age 71, and minimum withdrawals are forced every year โ whether you need the money or not. These mandatory draws can push your taxable income higher than necessary, leaving more in tax than if you'd drawn from TFSA or Non-Reg earlier.