Quick answer: Ontario currently identifies 23 compulsory trades. To legally practise one, a person generally must hold a valid Certificate of Qualification, Provisional Certificate of Qualification or Registered Training Agreement, unless a specific exemption applies. Non-compulsory trades do not require apprentice registration or certification to work legally.
What does “compulsory trade” mean?
A compulsory trade is legally restricted because public safety and technical competence are especially important. Employers and workers must confirm the required authorization before performing the trade’s restricted scope of practice.
Examples of compulsory trades
Examples include plumber, construction and maintenance electrician, steamfitter/pipefitter and hairstylist. The official list can change, so use Skilled Trades Ontario’s live trade table rather than an old screenshot.
What authorization is accepted?
- A valid Certificate of Qualification
- A valid Provisional Certificate of Qualification
- A Registered Training Agreement as an apprentice
- A specific statutory or program exemption, when applicable
All compulsory trades have certifying exams. Journeypersons in compulsory trades must keep required certification current.
Compulsory vs non-compulsory trades
| Question | Compulsory | Non-compulsory |
|---|---|---|
| Must you be registered/certified to work? | Generally yes | Generally no |
| Certifying exam | Yes | Available for some trades |
| Certificate renewal | Required | Generally not required |
| Employer may value certification | Yes | Yes |
How to verify a worker
- Open the Skilled Trades Ontario Public Register.
- Search the worker’s name or account number.
- Confirm the trade and current status.
- Check expiry information where applicable.
The register helps confirm whether a worker or apprentice is authorized in a compulsory trade.
What newcomers should do
Do not assume an overseas licence transfers automatically. Identify the exact Ontario trade, compare duties and contact Skilled Trades Ontario. Depending on your experience, the path may be an apprenticeship, recognition of a Canadian certificate or a Trade Equivalency Assessment.
Frequently asked questions
Can I work as a helper?
A helper role does not permit someone to perform restricted compulsory-trade work independently. Duties and supervision matter; confirm the permitted scope.
Is every Red Seal trade compulsory in Ontario?
No. Red Seal status and Ontario compulsory classification are different concepts.
How many recognized trades are in Ontario?
Skilled Trades Ontario states that Ontario has 144 recognized trades with apprenticeship programs, including 23 compulsory trades.
Related career guides
Official sources
Check the current compulsory-trades rules, official trade table and Public Register.
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