Business, finance and tax ·
Ontario WSIB sets lower 2027 average premium rate
By Workvado / Litequo LLC · Published · Updated
The province and WSIB say the average rate will fall to CAD $1.18 per CAD $100 of insurable payroll, while construction employers should use their own class and firm statements for budgets.
Ontario announced on October 22 that the Workplace Safety and Insurance Board’s average premium rate for businesses will decline from CAD $1.23 to CAD $1.18 per CAD $100 of insurable payroll in 2027. The provincial release says the change applies from January 1 and will reduce costs for more than 80 per cent of premium-paying businesses, with an estimated CAD $160 million in aggregate employer savings during 2027. WSIB’s announcement likewise describes the new average rate. The average is a system-wide reference point; it is not a quote for every employer and should not be inserted directly into every contractor’s project estimate.
The Ontario General Contractors Association’s October 22 bulletin gives a construction-specific detail: the 2027 class rate for non-residential building construction, Class G6, is projected to fall 1.9 per cent, from CAD $1.61 to CAD $1.58 per CAD $100 of insurable earnings. The bulletin says 92 per cent of businesses in Class G6 are expected to see a rate decrease or no change, excluding new businesses assigned the class rate and some employers whose insurable earnings remain provisional. That class profile is more relevant to many general contractors than the provincial average, but each employer’s actual premium can still differ based on its classification and rate-setting information.
For a contractor, workers’ compensation premiums are one component of labour cost and cash-flow planning. The calculation depends on insurable earnings, the employer’s classification and its applicable rate, alongside the board’s rules for the year. Payroll is the base to which a per-$100 rate applies, so a rate decrease does not mean a fixed dollar reduction for every firm. A company with different trades, operations or classes may not use the G6 figure for all of its payroll. Employers should compare their own rate statement and covered earnings rather than multiplying total project value by the published percentage or assuming the provincial savings estimate is proportional to their business.
WSIB says individual 2027 premium rate statements will be available through its online services beginning in November 2026. That timing gives employers an opportunity to update annual budgets before the new year, but project managers should make sure the correct statement is linked to the correct legal entity and operating classification. Firms with multiple subsidiaries, payroll accounts or work activities should reconcile the details with their finance and payroll teams. If a business believes its classification or payroll information is incorrect, it should use the board’s established account channels to resolve the issue; a headline average cannot diagnose an employer-specific discrepancy. Keeping the statement with the annual estimating assumptions creates a clear audit trail when actual labour costs are reviewed against bid allowances. It also helps a contractor explain why a change in its own rate may differ from the provincial news headline.
Construction firms can translate the change into estimating practice by keeping the premium assumption explicit. For bids spanning 2026 and 2027, separate the wage and payroll assumptions by the period when the work is performed and confirm whether the contract allows price adjustments for statutory cost changes. The 2027 rate takes effect January 1, but a long-term project may include payroll paid in both rate years. If the work is subcontracted, the prime contractor should not assume the subcontractor’s insurance cost matches its own. Each firm remains responsible for confirming its coverage and rates, and bid comparisons should use consistent assumptions about payroll, premiums and timing. If a tender uses a loaded hourly labour rate, identify whether that rate already includes workers’ compensation expense; otherwise the premium could be counted twice or omitted. The same applies when comparing quotes from firms with different operating classes. A consistent cost basis makes bid reviews more meaningful and reduces late-stage surprises in project forecasts.
The board describes rate setting as connected to the costs of the compensation system and employer classifications. The Ontario release frames the reduction as support for business investment and says the province has returned CAD $4 billion in rebates to eligible safe businesses since 2024. Those are province-wide policy statements, not a guarantee that an individual contractor will receive the same reduction or rebate. A firm’s cost can move differently because its payroll, class assignment, claims experience and other factors are not identical to the provincial distribution. Contractors should distinguish an annual premium-rate change from a surplus rebate and from a reduction in the actual cost of a particular project.
Lower statutory costs can improve a business forecast at the margin, but they do not remove the need to manage workplace risk. Insurance premiums fund coverage and compensation; safe work practices remain an operational and legal responsibility. Employers should continue budgeting for training, supervision, protective equipment and controls even when a rate declines. A reliable comparison of year-to-year labour cost should also keep wages, hours, overtime, benefits and payroll growth separate from the premium rate. If a company increases its workforce or works more hours, the total contribution may rise even if the rate per CAD $100 falls. Contractors should therefore avoid treating a rate cut as a reason to weaken a safety budget or as a direct measure of productivity. It is one cost input within a much wider operating picture.
The October 22 announcement gives Ontario contractors an early planning signal: the system average and the G6 profile both point downward for 2027, but employer-specific statements govern actual budgeting. Finance teams can prepare scenarios using the firm’s current insurable payroll, then replace estimates with the 2027 statement when available. Estimators should record the rate year and class behind each labour assumption, particularly on bids that cross January 1. For cash planning, separate expected premium expense from any potential rebate. This keeps published averages useful as context while ensuring the project price reflects the contractor’s own payroll and insurance position. A one-year rate change may be modest relative to wage movement or schedule risk, so it belongs in a complete cost model rather than as a standalone forecast of profitability. That gives operations and finance teams a shared, dated assumption.
- Announcement date
- 2026-10-22
- 2027 Ontario average rate
- CAD $1.18 per CAD $100 insurable payroll
- 2026 Ontario average rate
- CAD $1.23 per CAD $100 insurable payroll
- Non-residential building Class G6
- CAD $1.58 per CAD $100 in 2027; down 1.9%
- Rate effective date
- 2027-01-01
Sources
- Ontario Saving Businesses $160 Million as WSIB Lowers Premiums, Government of Ontario, read October 27, 2026
- WSIB premium rates to be reduced in 2027 as businesses face trade uncertainty, Workplace Safety and Insurance Board, read October 27, 2026
- WSIB Premium Rates Decreasing in 2027, Ontario General Contractors Association, read October 27, 2026