How your refund is worked out
- Income: your employment income, plus any other taxable income.
- Deductions: RRSP contributions you’re deducting, and enhanced CPP or QPP contributions, are taken off.
- Tax: federal and provincial tax on what’s left, less the non-refundable credits everyone gets: the basic personal amount, credits for CPP or QPP and EI, and the Canada employment amount.
- Refund: the tax deducted from your pay (T4 box 22) minus the tax you owe.
Other credits, such as medical expenses, donations, tuition and the disability amount, add to the refund but aren’t included here.