An offer letter is a written document confirming the terms of employment before the employee starts. It is not just a formality — in Ontario, it forms the foundation of the employment relationship and can be relied upon as a legal document if a dispute arises.
A well-drafted offer letter protects you as an employer. A poorly drafted one can expose you to liability you did not anticipate.
What Every Offer Letter Must Include
Job title and description
Clearly state the position being offered and a brief summary of the role and responsibilities. Vague job descriptions create disputes later about what the employee was actually hired to do.
Start date
State the confirmed start date. If it is conditional on background checks or references, say so explicitly.
Compensation
Include the base salary or hourly rate, pay frequency, and any variable compensation — bonus, commission, or profit sharing. If a bonus exists, describe how it is calculated. A bonus described only as “discretionary” with no further detail is a common source of disputes.
Hours of work
State the standard hours and days of work. If the role requires overtime or flexible hours, say so — but do not include language that attempts to opt the employee out of ESA overtime protections entirely.
Benefits
Describe the benefits package — health, dental, life insurance, pension or RRSP matching — and when coverage begins. If benefits are subject to a waiting period, state that clearly.
Vacation entitlement
State the vacation entitlement in days or weeks. It must meet or exceed the ESA minimum of two weeks after one year. Many employers offer more — if so, specify it.
Termination clause
This is the most legally consequential part of the offer letter. A properly drafted termination clause limits your liability on termination to ESA minimums — but only if it is written correctly. A poorly drafted clause is regularly struck down by Ontario courts, leaving the employer exposed to full common law reasonable notice.
Get this clause reviewed by a lawyer. It is the most important sentence in the entire document.
Conditions of employment
Include any conditions the offer is subject to — satisfactory reference checks, background screening, proof of eligibility to work in Canada, or signing of additional agreements such as a confidentiality agreement.
Probation period
If you intend to include a probation period, state it clearly. Remember — Ontario law only recognizes a three-month probationary period under the ESA, regardless of what the contract says.
What to Avoid
Verbal promises not in the letter — if you promised something during the interview, put it in writing. Verbal promises made during recruitment can become legally binding even if they are not in the contract — and contradicting them later is costly.
Copying a template without legal review — generic offer letter templates are one of the most common sources of unenforceable termination clauses. A template that worked in another province or jurisdiction may not comply with Ontario law.
Ambiguous bonus language — if a bonus is performance-based, define the formula. If it is truly discretionary, understand that courts may still find the employee entitled to it during a notice period.
Overbroad IP or non-compete clauses — non-compete clauses are void for most Ontario employees since 2021. Including one signals an outdated contract and may undermine the credibility of the entire document.
The Signing Process
Give the employee time to review — presenting an offer letter and demanding an immediate signature is a red flag for courts. Give the employee at least a few days to review and ideally encourage them to seek independent legal advice.
Get it signed before the start date — an offer letter signed after the employee has already started work may not be enforceable without fresh consideration. Timing matters.
Keep a signed copy — both parties should retain a signed copy of the offer letter for the duration of employment and beyond.
The bottom line: A well-drafted offer letter takes an hour to get right and can save years of legal disputes. The termination clause alone is worth having reviewed by an employment lawyer — because the cost of getting it wrong almost always exceeds the cost of getting it right from the start.
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