Can an employer legally change employee hours to match business needs?

Every month, Kate Teves, HR consultant, recruiter and founder of The HR Pro, answers Realtors’ questions about anything and everything related to human resources. Have a question for Kate? Send her an email.

Question: Can you legally increase or cut employee hours when the economy shifts?

Kate: While many employers hope 2026 will be less turbulent than its predecessor, experience shows the economy rarely moves in a straight line or unfolds as planned. It surges, stalls and surprises, and sometimes keeps business owners up at night.

One of the most common questions that arises during periods of uncertainty is deceptively simple: Can an employer legally increase or decrease employee hours to match business needs?

The answer is yes, but only if the proper groundwork is in place.

Flexibility must be planned, not improvised

Workplace flexibility cannot be improvised when conditions tighten. It must be designed in advance through employment contracts, workplace policies and clearly established expectations set long before the market begins to wobble.

In Ontario, the Employment Standards Act is the starting point, but it is not the final word. The act establishes minimum standards — a floor, not a ceiling. It does not automatically grant employers the right to adjust employee hours at will.

When hours are reduced without proper authority, employers can face constructive dismissal claims, termination pay obligations or even severance exposure, depending on business size, annual payroll and length of service. These outcomes can be costly, running into tens of thousands of dollars.

Contracts create clarity for hourly workers

The path to flexibility begins with clarity, and clarity starts on paper.

For hourly and part-time employees, this typically means an employment contract that explicitly acknowledges operational realities. Business demands change, and hours may rise or fall based on market conditions or operational needs. When this flexibility is clearly stated and there is no implied guarantee of fixed hours, employers have greater room to adjust schedules without altering fundamental terms of employment.

Even where agreed-upon hours are set out in a contract, best practice is to include language confirming those hours may vary. Without it, a sudden reduction can feel less like a business adjustment and more like a breach of trust or a legal misstep.

Using ESA tools during busy periods

The Employment Standards Act also provides tools to manage busy periods more effectively. Hours-of-work averaging agreements, when properly drafted and compliant, can help smooth temporary workload spikes without triggering unintended overtime costs.

These agreements must be in writing and carefully administered, but when used correctly, they provide flexibility while remaining firmly within legal limits.

Salaried roles still have limits

Salaried employees require a more nuanced approach. Salary does not mean unlimited availability, despite what some job postings may imply. If a role genuinely involves fluctuating demands, the contract should state this clearly.

Temporary increases in workload can be reasonable, particularly during peak periods, but best practice is to balance heavier stretches with time off in lieu once demands ease. It is also important to remember that if a salaried employee is non-exempt under the Employment Standards Act, overtime rules still apply. A salary does not eliminate overtime obligations.

Managing reduced workloads lawfully

When work slows, lawful options remain available. If an employment agreement permits variable scheduling, hours can often be reduced without triggering constructive dismissal, provided the changes are reasonable and not punitive.

Reasonableness is key. Courts and regulators tend to reject flexibility that only operates in one direction.

Temporary layoffs and hybrid options

During more significant downturns, a temporary layoff may be appropriate. Ontario’s Employment Standards Act permits temporary layoffs within defined limits, allowing employees to access Employment Insurance while preserving the employment relationship.

Communication is critical. Silence breeds anxiety, and anxiety often leads to legal disputes. Clear timelines, continued benefits where required and regular, honest updates can significantly reduce risk.

Hybrid approaches also exist, including reduced hours combined with partial Employment Insurance benefits or work-sharing arrangements. These options are often underused, but in the right circumstances they can help employers retain experienced staff while navigating slower periods.

Common mistakes to avoid

What employers should avoid is consistent across industries. Unilaterally cutting hours without contractual authority is a common and costly mistake. Treating salaried employees as if they have no limits is another.

Assuming that because an employee was flexible in the past they must always be flexible is a risky leap. Failing to document changes or discussions invites misunderstandings to escalate into disputes.

Preparation is the key to flexibility

The bottom line is this: flexibility is possible, but it must be intentional. Employers facing regular economic fluctuations are best served by investing in well-drafted employment contracts, clear policies and thoughtful planning for both growth and contraction.

While this article focuses on Ontario’s Employment Standards Act, similar principles apply across other provinces under their respective legislation. The details vary, but the theme is consistent: flexibility must be earned through preparation, not assumed in the moment.

In uncertain markets, the businesses that fare best are not those scrambling to react, but those that planned for change before it arrived.