Source Deductions

Payroll

Source deductions are the income tax, CPP and EI amounts an employer withholds from employees' pay and remits to the CRA on their behalf.

When you pay an employee, you must withhold income tax, Canada Pension Plan contributions and Employment Insurance premiums at source and remit them to the CRA, together with the employer's matching CPP and EI. The employee receives the net pay; the withheld amounts never belong to the employer.

Because they are held in trust for the Crown, source deductions carry the harshest compliance regime in the tax system. Late remittance penalties run up to 10%, or 20% for repeat failures, and directors are personally liable for amounts a corporation fails to remit, incorporation offers no shield here.

Example

From an employee's $4,000 salary you withhold income tax, CPP and EI totalling, say, $1,000, and pay them $3,000. You then remit the $1,000 plus your employer CPP and EI share to the CRA by the 15th of the next month.

Primary source

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Source Deductions Frequently Asked Questions

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The income tax, CPP and EI withheld from employees' pay and remitted to the CRA, along with the employer's matching CPP and EI contributions.
Yes. Directors can be held personally liable for source deductions a corporation fails to remit, because they are trust funds held for the Crown.
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Multiply the assessed value of the property by the tax rate for its property class. Assessment is set by a provincial assessment authority on its own cycle and increases are often phased in, so the value lags the market. The rate is set each year by the municipality out of its budget, with an education portion added by the province. Both figures appear on your notice, which is why identical homes in different municipalities carry different bills.

Tax exempt describes an amount or a transaction that tax does not apply to at all, which is different from a deduction or credit that merely reduces tax. Common examples are supplies that are exempt or zero-rated for GST/HST, investment income earned inside a TFSA, and specific receipts Parliament has excluded from income. Registered charities and non-profits can be exempt from income tax while still carrying filing duties. Exemption is never automatic; the rule must fit your facts.

Federal tax is the share of income tax that goes to the federal government, charged on taxable income in graduated brackets that are the same everywhere in Canada. Your total bill is that federal amount plus your province or territory's own tax, less the credits you claim. Payroll deductions shown on a T4 cover both layers. Quebec residents receive a refundable abatement of their federal tax because Quebec opted out of certain federal-provincial programs and funds them itself; separately, Quebec also collects its provincial tax through its own return.

Rent paid is not deductible on the federal return. Relief comes instead through provincial credits claimed on the provincial form filed with your T1, such as Ontario's energy and property tax credit, Manitoba's renters credit and Quebec's solidarity tax credit, each with its own residency and income tests. Rent is deductible only as a business or employment cost: the work-space-in-the-home share on a T2125, or with an employer-signed form where an employee is required to work from home.

Udit Gupta, founder of Tax Filings Canada

Reviewed and fact-checked by Udit Gupta

Ex Big 4 — Ernst & Young, Deloitte · International & cross-border tax specialist · CPA Canada (In-Depth Tax Program) · Chartered accountant, ICAI & MIA

Udit Gupta has over 15 years of experience helping corporations and business owners with corporate structuring, corporate tax filing, bookkeeping, payroll, GST/HST, cross-border tax and CRA representation. Big 4 trained at Ernst & Young and Deloitte, and qualified as a chartered accountant in India and again in Malaysia, he founded his accounting practice in 2014 to serve entrepreneurs, startups and non-resident business owners across Canada. View full member bio.

The Institute of Chartered Accountants of India — member 521458 · Malaysian Institute of Accountants — member CA 44667 · Ex Big 4: Ernst & Young, Deloitte · CPA Canada (In-Depth Tax Program), completed 19 Dec 2023 · In-Depth GST/HST Part I, 12 Jul 2022 · Part II, 5 Jul 2023

Editorial policy. Every page is researched against primary sources — the Income Tax Act, CRA publications and CPA Canada guidance — and every rate or threshold is stated with the tax year it applies to.

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