Actually, sometimes it is legal to pay two employees differently for the same job.
Sometimes it is ILLEGAL
Ontario law does not require every employee in the same role to earn identical pay. But it does prohibit pay differences based on certain grounds — and those rules are strict.
When a Pay Difference Is Illegal
Under Ontario’s Employment Standards Act and the Ontario Human Rights Code, your employer cannot pay you less than a coworker doing the same job because of:
- Gender — the Pay Equity Act specifically prohibits paying women less than men for work of equal value
- Race or ethnicity
- Age
- Disability
- Any other protected ground under the Human Rights Code
If the pay gap between you and your coworker is connected — even indirectly — to any of these grounds, that is discrimination. Full stop.
When a Pay Difference May Be Legal
Not every pay gap is discrimination. Employers can legally justify different pay for the same role based on:
- Seniority — a longer-serving employee earning more is generally permitted
- Merit — documented performance differences that justify different pay levels
- Experience — one employee bringing significantly more relevant experience to the role
- Negotiation — one employee negotiated a higher starting salary
The key word is documented. If the reason exists only on paper after the fact, it is much harder to defend.
The Pay Equity Act — Especially Important for Women
Ontario’s Pay Equity Act goes further than general discrimination law. It requires employers with 10 or more employees to ensure that female-dominated job classes are paid at least as much as comparable male-dominated job classes of equal value.
If you are a woman earning less than a male colleague doing work of equal or comparable value — that may be a pay equity violation, separate from and in addition to a human rights complaint.
What to Say to Your Employer
If you decide to raise the issue internally, keep it professional and factual:
“I have become aware that colleagues in similar roles may be earning more than I am. I would like to understand how my compensation is determined and whether there is an opportunity to review it.”
Avoid accusations. Ask for transparency. Put it in writing so there is a record.
What Your Employer Cannot Do After You Raise It
Raising a pay equity or discrimination concern is a protected activity under Ontario law. Your employer cannot:
- Fire you for asking
- Demote or discipline you for raising the concern
- Create a hostile environment in response
Any of these responses is retaliation — a separate and serious legal violation.
For Employers — What to Do
Conduct a pay audit — regularly review compensation across roles to identify unexplained gaps before an employee does.
Document every pay decision — every salary offer, raise, and adjustment should have a clear, recorded rationale tied to seniority, merit, or experience.
Have a clear compensation policy — employees should understand how pay is determined. Opacity breeds resentment and legal risk.
Act on complaints promptly — an unaddressed pay equity complaint can become a human rights application. Address it early and honestly.
Train managers — pay decisions made informally by managers without HR oversight are where discrimination most commonly creeps in.
The bottom line: Being paid less than a coworker for the same job is not automatically illegal — but it is illegal when the reason connects to your gender, race, age, or any other protected ground. If you suspect discrimination is behind the gap, you have real options. And if you are an employer, unexplained pay gaps are a liability waiting to surface.
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