The Ontario Employment Standards Act (ESA) governs nearly every aspect of the employment relationship in the province. For small business owners, it sets the non-negotiable floor on wages, hours, vacation, leaves, and termination. Getting it wrong exposes you to Ministry of Labour orders and potential civil claims. This primer covers the provisions that most commonly trip up small employers.
Who the ESA covers
The ESA covers most employees who perform work in Ontario for an employer, regardless of whether the employment is full-time, part-time, permanent, or fixed-term. A few categories are excluded or have modified rules: federally regulated employees (banking, telecom, interprovincial transport), independent contractors (though the "dependent contractor" category occupies a grey zone), and certain professionals (lawyers, architects, engineers) when working in their professional capacity.
For a small business hiring a part-time counter worker, delivery driver, or office administrator, the ESA applies in full. There is no SMB exemption. The size of your business does not reduce the floor, it only affects whether some of the higher-tier provisions (like mass termination rules) are triggered.
If you are unsure whether a worker is an employee or an independent contractor, assume employee-level obligations until you have verified the classification. The Ministry of Labour uses a multi-factor analysis, see our separate guide on contractor vs employee in Canada for detail on those factors.
Hours of work and overtime
The ESA limits standard hours to 8 per day and 48 per week. Employers who need employees to work beyond these limits must get a written agreement in advance, a verbal "you okay with some extra hours?" does not satisfy the requirement. Maximum hours with the agreement in place are 13 hours per day and 60 hours per week.
Overtime pay at 1.5 times the regular rate applies after 44 hours worked in a week. Overtime is calculated weekly, not daily, an employee can work 10 hours one day and 6 the next with no overtime obligation if the weekly total is under 44. Some employees may agree in writing to take time off instead of overtime pay, called "time off in lieu," at a rate of 1.5 hours off per overtime hour worked.
Certain job categories are exempt from overtime provisions under ESA regulations, including managers and supervisors who perform management as their primary duty, IT professionals in specific roles, and some others. The exemption must be a genuine fit with the employee's actual duties, misclassifying a line employee as a "manager" to avoid overtime is a common ESA violation.
Vacation entitlement and public holidays
Employees are entitled to 2 weeks of vacation per year after completing 12 months of employment, and 3 weeks after 5 years. Vacation pay accrues at 4% of gross earnings (6% after 5 years). Employers must provide the vacation time within 10 months of the end of the vacation entitlement year unless the employee provides written consent to carry it forward.
Ontario has 9 statutory public holidays: New Year's Day, Family Day, Good Friday, Victoria Day, Canada Day, Labour Day, Thanksgiving, Christmas Day, and Boxing Day. Employees who qualify (worked their last regular day before and the first regular day after the holiday) are entitled to the holiday off with public holiday pay, or to be paid premium pay if they work on the holiday.
Public holiday pay calculation changed in 2018 and is now based on the regular wages earned in the pay period immediately before the public holiday, divided by the number of days worked. For variable- hour employees this can be complex to calculate, most payroll software handles it automatically, which is a strong argument for using a payroll system rather than manual calculations.
Termination notice: ESA minimums vs common law
The ESA requires minimum notice (or pay in lieu) for termination without cause after 3 months of employment. The formula: 1 week per year of service, minimum 1 week, maximum 8 weeks. After 5 years, severance pay may also apply if your annual payroll exceeds $2.5M (1 week per year of service, up to 26 weeks).
The ESA is a floor, not a ceiling. Courts apply common law "reasonable notice" as a default when there is no enforceable written termination clause, and common law notice can be significantly higher than the ESA formula, sometimes months of pay for even modest tenure. A written employment agreement with a properly drafted termination clause that limits notice to the ESA minimum is essential for limiting this exposure.
Termination "for cause" (serious misconduct) eliminates the notice obligation under the ESA, but the bar is high. Courts have found that lateness, minor insubordination, and performance issues do not meet the threshold, only significant, documented, willful misconduct typically qualifies. Progressive discipline documentation is essential before relying on a for-cause termination. The costs of getting this wrong are covered in our guide to the true cost of employee turnover for Canadian SMBs.
Leaves, record-keeping, and Ministry enforcement
The ESA provides numerous job-protected leaves: Personal Emergency Leave (up to 3 unpaid sick days and 2 bereavement days), Family Caregiver Leave, Pregnancy and Parental Leave (up to 18 months combined), Domestic or Sexual Violence Leave, and others. Employees on an ESA leave cannot be terminated, disciplined, or threatened.
Employers must keep payroll records including name, address, hours worked each day, wages paid, vacation pay accrued and taken, and public holiday pay calculations. Records must be retained for 3 years after the relevant period. For employees without a fixed workplace, you must also keep records of the work location.
The Ministry of Labour, Immigration, Training and Skills Development (MLITSD) conducts proactive and complaint-based inspections. An officer who finds violations can issue an Order to Pay (requiring repayment to employees), a compliance order, and in serious cases, a director's liability finding that pierces the corporate veil. The most common triggers for complaints are unpaid wages, missed overtime, and improper termination, all preventable with basic systems in place.
Frequently asked questions
Does the Ontario Employment Standards Act apply to small businesses with only one or two employees?
Yes. There is no minimum employee count for ESA coverage. All employees performing work in Ontario for an employer are covered, regardless of business size, unless they fall under a specific exemption (federally regulated workers, some professionals, etc.).
What is the overtime threshold in Ontario?
Overtime pay at 1.5 times the regular rate is required after 44 hours worked in a week. Overtime is calculated on a weekly basis, not daily. Some employees can agree in writing to take time off in lieu instead, at 1.5 hours per overtime hour.
How many weeks of vacation does an Ontario employee get?
Two weeks (10 days) of vacation per year after 12 months of employment. This increases to three weeks after five years. Vacation pay accrues at 4% of gross wages (6% after five years), even before the entitlement year is complete.
How much notice do I need to give when terminating an employee in Ontario?
Under the ESA, 1 week per year of service after 3 months of employment, to a maximum of 8 weeks. Without a written termination clause, courts may apply common law reasonable notice, which can be significantly higher. A properly drafted employment agreement with a termination clause limits your exposure to the ESA formula.
What happens if the Ministry of Labour finds an ESA violation at my business?
An Employment Standards Officer can issue an Order to Pay requiring you to repay employees what they are owed, plus administrative penalties in some cases. Repeated or deliberate violations can result in prosecution. The most effective protection is maintaining proper payroll records and a signed employment agreement with each employee.