Compliance calendar

T4, T5 and WCB Alberta: the filing deadlines that follow year end

By Gurjinder Dhillon, CPA, CGA, MBA,Published December 28, 2026,6 min read

CPA reviewing Alberta T4, T5 and WCB filing deadline calendar

Quick answer

T4, T4A and T5 slips for 2026 are due by the last day of February 2027; when the deadline falls on a weekend, the next business day is generally on time. WCB Alberta annual returns are typically due February 28, and T2 returns are due six months after fiscal year end.

Key takeaways

Build filing dates into the January close process.
Payroll records need to reconcile before slips are prepared.
Check current CRA and WCB guidance when dates approach.

Prepare payroll records early

Reconcile payroll ledgers, benefits and remittances so annual slips are prepared from accurate information.

Confirm Alberta requirements

WCB reporting and other provincial obligations should be reviewed against the current guidance for your business.

Use a year end calendar

A shared calendar gives owners and the finance team a clearer view of what comes next after the financial year closes.

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Sources & review

Reviewed by Gurjinder Dhillon, CPA, CGA, MBA. Check current primary guidance before acting on filing dates or tax questions: Canada Revenue Agency (opens in new tab) and WCB Alberta (opens in new tab).

Last updated December 28, 2026