01Canada

T4, in plain English.

Workzoom defines T4 as follows. The T4 is the Canadian annual statement of remuneration paid, issued by the employer to each employee and to CRA by the end of February. It reports employment income, CPP, EI, and...

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AThe short answer

The T4 is the Canadian annual statement of remuneration paid, issued by the employer to each employee and to CRA by the end of February. It reports employment income, CPP, EI, and income-tax withholding for the calendar year. Workzoom generates T4 slips and the T4 Summary automatically from payroll history.

How T4 works.

T4 is one of the operating concepts behind a modern Canada platform. In practice, the term names a specific outcome: an employer can prove the calculation, automate the workflow, and audit the result without an intermediate spreadsheet or third-party tool. Workzoom treats T4 as a first-class function of the single employee record, which means every dependent module, HR, payroll, workforce, and talent, reads from the same source of truth.

Why mid-market HRIS buyers care about T4.

Mid-market employers feel the cost of T4 differently than small businesses or global enterprises. Below 50 employees the workload is small enough that a manual process survives. Above 5,000, the budget tolerates a multi-system stack with specialist consultants. Between those, the employer carries enterprise-grade complexity on a small-business administrative team. That is the size band Workzoom is built for. Concretely, that means three things: every concept on this page is automated by default; statutory rates refresh inside the platform without a re-implementation; and the same employee record drives reporting, audits, and decisions across every suite.

How Workzoom does T4 differently.

Workzoom encodes T4 as a deterministic calculation tied to the employee's position, jurisdiction, and effective dates. Statutory rates are maintained by Workzoom and pushed to the platform automatically, so employers never copy a rate card or re-key a percentage. Reports, audits, and exception alerts read from the same record, so there is no reconciliation between an HR database and a payroll database.

Where T4 sits between HR and payroll.

T4 does not stand alone. The concepts most often paired with it on a Canada run are CPP, EI, CRA. Each is defined elsewhere in this glossary so you can trace the full chain without leaving the site.

The T4 mistakes that show up in audits.

  • Treating T4 as a one-time setup rather than an ongoing calculation that has to refresh each pay cycle, position change, or rate update.
  • Maintaining the rule in a spreadsheet outside the payroll system. The spreadsheet drifts within a quarter, and the audit trail disappears.
  • Letting the system of record diverge from the system of calculation. Two databases means two truths, and the discrepancy surfaces on the year-end filing.

T4 questions to put in your RFP.

  • Does the platform handle T4 on the same employee record as HR and time, or via a downstream integration?
  • Who maintains the underlying rate or rule, and how is it updated when the authority publishes a change?
  • Can the platform produce an audit-ready report for T4 across any date range without exports?
  • What does the failure mode look like when an employee crosses a threshold mid-pay-period?

Related terms

Questions about T4

The T4 is the Canadian annual statement of remuneration paid, issued by the employer to each employee and to CRA by the end of February. It reports employment income, CPP, EI, and income-tax withholding for the calendar year. Workzoom generates T4 slips and the T4 Summary automatically from payroll history.
Workzoom encodes T4 as a deterministic calculation tied to the employee's position, jurisdiction, and effective dates. The capability lives on the same employee record as HR, payroll, workforce, and talent, so reports and audits read from one source of truth. Pricing starts at $4 USD per employee per suite per month, with implementation, training, and support included.
Mid-market employers feel the cost of T4 differently than small businesses or global enterprises. Workzoom is built for the band in between: enterprise-grade complexity on a small-business administrative team. Statutory rates and rules refresh automatically inside the platform, so a 250-employee payroll team is not stuck maintaining a rate table.
Workzoom hosts Canadian customer data on AWS infrastructure in Montreal (ca-central-1) with role-based access controls, AES-256 encryption at rest, and immutable audit logs. PIPEDA alignment includes consent management, purpose limitation, and breach notification. The audit trail for T4 is queryable across any date range without exports.
Named Workzoom customers running production HR and payroll include County of Renfrew (900 employees, Ontario municipality), Silvera for Seniors (400 employees across 36 Calgary buildings), Cable Bahamas (1,200 employees), AML Foods, ALIV, and Ktunaxa Nation Council. Workzoom has been operating Canadian payroll for 25+ years.

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