Register With WSIB Before Hiring

Ontario employers must register with WSIB before their first employee starts work. Operating without WSIB coverage exposes your business to retroactive premium assessments, penalties of up to 100% of unpaid premiums, and personal liability for workplace injury costs. Completing your WSIB registration before hiring eliminates this risk from day one.

Classify Workers Correctly for WSIB

WSIB premiums are based on your industry rate group classification. Incorrect WSIB classification — either the wrong rate group or misidentifying employees as independent contractors — triggers retroactive premium adjustments and audit penalties. We review every worker relationship to ensure your WSIB reporting reflects the correct classification and premium rate.

Report Insurable Earnings Accurately

Your WSIB reporting must include all insurable earnings — wages, bonuses, commissions, vacation pay, and taxable benefits — not just base salary. Under-reporting insurable earnings on your WSIB filing results in retroactive premium assessments plus penalties when WSIB audits your payroll records. Accurate WSIB earnings reporting prevents these costly surprises.

File Your WSIB Annual Reconciliation on Time

WSIB requires an annual reconciliation of estimated versus actual insurable earnings, typically due by March 31. Late WSIB reconciliation filings trigger automatic penalties and interest on any premium shortfall. We complete your WSIB annual reconciliation well before the deadline so your account stays in good standing with zero late charges.

Reconcile WSIB Premiums to Payroll Records

Your WSIB premium payments must match the insurable earnings reported in your payroll system. Discrepancies between WSIB reporting and your payroll books create audit flags that lead to detailed reviews of your entire workforce. Monthly reconciliation of WSIB premiums against payroll ensures every dollar ties back cleanly.

Deduct WSIB Premiums on Your Tax Return

Employer WSIB premiums are fully deductible as a business expense on your T2 corporate tax return. Many businesses fail to claim WSIB costs separately in their bookkeeping, leaving this deduction buried or missed entirely. Proper WSIB reporting that tracks premiums by period ensures you claim every dollar of this deduction against your corporate income.

Review Your WSIB Rate Group Annually

WSIB premium rates change annually based on industry experience and claims history. If your business activities have shifted, your WSIB rate group classification may no longer be accurate. An annual WSIB compliance review ensures you are not overpaying premiums in the wrong classification — savings that go directly to your bottom line.

Prepare for WSIB Audits Proactively

WSIB conducts periodic audits comparing your reported insurable earnings against payroll records, T4 summaries, and CRA data. Mismatches between your WSIB reporting and T4 totals trigger expanded reviews and retroactive assessments. We maintain WSIB audit-ready documentation year-round so your records align with every external data source.

Correct Past WSIB Reporting Errors

If you discover prior WSIB reporting errors — under-reported earnings, missed employees, or wrong classifications — file corrections with WSIB immediately. Voluntary WSIB corrections before an audit demonstrates good faith and may reduce penalty exposure. We review historical WSIB filings and submit amendments to bring your account current.

Integrate WSIB With Payroll Processing

Your WSIB reporting should be integrated with your payroll system so insurable earnings calculate automatically each pay period. Disconnected WSIB tracking creates the manual errors that lead to under-reporting and audit assessments. We configure your payroll in Wagepoint or PaymentEvolution to track WSIB insurable earnings alongside CPP and EI deductions.