Statutory Deductions
Source deductions, income tax, CPP, EI, and the earnings bases payroll uses to calculate them.
Statutory Deductions
This section explains the mandatory deduction language that turns gross pay into take-home pay and creates employer remittance work. It covers the umbrella term source deductions, income tax withholding, and the payroll concepts that feed CPP and EI calculations.
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- Source Deductions explains the Canadian umbrella term for income tax, CPP, and EI amounts withheld from pay.
- Income Tax Deduction explains the payroll withholding line many employees notice first on the pay stub.
- TD1 explains the form payroll uses as an input for income tax withholding.
- Federal Income Tax Deduction explains the federal portion inside payroll tax withholding.
- Provincial Income Tax Deduction explains the province-linked payroll tax withholding layer.
- CPP explains Canada Pension Plan payroll contributions.
- CPP2 explains the second additional CPP layer that can appear for higher pensionable earnings.
- EI explains Employment Insurance payroll premiums.
- Pensionable Earnings explains the earnings base that matters for CPP treatment.
- Insurable Earnings explains the earnings base that matters for EI treatment.
Questions This Section Answers
- Why does gross pay not match net pay?
- How is income tax deduction different from CPP and EI?
- How is federal income tax deduction different from provincial income tax deduction in payroll?
- Why can CPP-related deductions change later in the year for higher earnings?
- Which employee form helps payroll determine income tax withholding?
- Why does payroll track separate earnings bases for different deductions?
- How do CPP and EI fit inside the broader source-deductions concept?
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In this section
- CPP
Canada Pension Plan contribution withheld from pensionable earnings, with matching employer payroll responsibility and Quebec-specific exceptions.
- CPP2
Second additional CPP deduction that can appear later in the year after regular CPP payroll withholding.
- EI
Employment Insurance premium withheld from insurable earnings, with a separate employer contribution and ROE-related reporting context.
- Federal Income Tax Deduction
Federal income tax withholding on payroll pay runs, pay stubs, TD1 inputs, and remittance totals.
- Income Tax Deduction
Payroll tax withholding that reduces net pay and sits beside CPP and EI inside source deductions.
- Insurable Earnings
Earnings base payroll uses for EI premiums, separate from broad gross pay and from ROE hour tracking.
- Pensionable Earnings
Earnings base payroll uses for CPP calculations, separate from gross pay and from EI's insurable-earnings base.
- Provincial Income Tax Deduction
Province- or territory-linked payroll tax withholding, distinct from the federal deduction and Quebec's separate provincial path.
- Source Deductions
Income tax, CPP, and EI amounts withheld from pay and later remitted through the Canadian payroll system.
- TD1
Payroll withholding form employees complete so income tax deductions reflect personal tax-credit information.
Revised on Friday, April 24, 2026