Your T4 slip is the source document for your tax return. Here's what every box means in plain English. Once you've gathered all your T4s, run them through our income tax calculator to estimate your refund.
Box 14 — Employment income
Total gross pay (before deductions). Line 10100 on your T1.
Box 22 — Income tax deducted
Tax already withheld. Bigger number = bigger refund.
Box 16 — CPP contributions
Your share of CPP. Goes to Line 30800.
Box 18 — EI premiums
Employment Insurance withheld. Line 31200.
| Box | Label |
|---|---|
| 10 | Province of employment |
| 12 | Social Insurance Number (SIN) |
| 14 | Employment income |
| 16 | Employee CPP contributions |
| 16A | Second additional CPP (CPP2) |
| 17 | Employee QPP (Quebec only) |
| 18 | Employee EI premiums |
| 20 | RPP contributions |
| 22 | Income tax deducted |
| 24 | EI insurable earnings |
| 26 | CPP/QPP pensionable earnings |
| 28 | Exempt CPP/EI/PPIP |
| 29 | Employment code |
| 40 | Other taxable allowances/benefits |
| 44 | Union dues |
| 46 | Charitable donations through payroll |
| 50 | RPP or DPSP plan number |
| 52 | Pension adjustment (PA) |
| 55 | PPIP premiums (Quebec) |