Expired Temporary SIN While Waiting for a Work Permit? What Canadian Workers Can Still Do

If you applied to extend or change your work permit before it expired, you can usually keep working in Canada under the same conditions while IRCC processes the application—even if your temporary SIN has expired.
Give your employer your expired work permit, proof that you applied on time, and your IRCC work permit extension letter if you received one. An employer-specific permit usually keeps you tied to the same employer, job, and location.
You generally cannot update the SIN expiry date while you’re on maintained status. Apply to update the SIN after you receive the new work permit, then give your employer the updated document.

The short answer: an expired temporary SIN does not automatically stop you from working

If your Canadian work permit expired while you were waiting for a decision on an extension or change application, you may still be allowed to work. The key issue is not simply whether the SIN shows an expired date. It’s whether you applied for the right work permit application before the original permit expired, remain in Canada, and continue following the conditions of that permit.

IRCC calls this maintained status. During this period, an eligible worker can generally keep working until IRCC makes a decision. Service Canada also confirms that a temporary SIN can continue to be used while you have maintained status.

Check IRCC’s official answer about working with an expired SIN

This answer is different if you applied only for a visitor record or study permit, applied after your work permit expired, left Canada, or are trying to start a new job that your current permit doesn’t allow.

Review IRCC maintained-status work rules

Who can keep working with an expired SIN?

You may be able to continue working if all of the following are true:

You applied to extend or change your work permit before the original work permit expired.
You’re still in Canada.
You’re waiting for IRCC to decide the work permit application.
You continue working under the conditions of the original permit.

For an employer-specific work permit, that normally means the same employer, job, and work location. You should not use maintained status as permission to switch to a completely different employer or position unless IRCC has separately authorized that change.

Open work permit holders generally have more flexibility because their permits usually allow them to change employers, jobs, or locations. However, any specific restrictions printed on the permit still matter.

Situations where you may not be allowed to keep working

You generally cannot keep working after your work permit expires if you applied only to extend your stay as a visitor. The same warning applies if you applied for a study permit instead of another work permit. In those cases, your ability to work normally ends when the work permit expires.

You may also have to stop working if you submitted the work permit application after the original permit expired. A restoration application does not usually give you permission to work while it is being processed.

Temporary resident permit applications are another exception. Applicants for a temporary resident permit do not benefit from maintained status in the same way.

What should you give your employer?

An employer may hesitate when a payroll or HR system flags an expired SIN or an expired work permit. The most useful response is to provide a clear document package rather than relying on the SIN alone.

Depending on how you applied, prepare copies of:

Your expired work permit.
The confirmation that IRCC received your extension or change application before the permit expired.
Your IRCC work permit extension letter, often called a WP-EXT letter, if you applied online and received one.
Your current passport or other identity document if your employer’s normal verification process requires it.
A short explanation that you are relying on maintained status and are continuing under the conditions of the original permit.

The WP-EXT letter can be useful evidence, but the date printed on the letter is not necessarily the final end of your work authorization. IRCC says that eligible workers can continue working until a decision is made, provided they continue to meet the maintained-status requirements.

If you applied on paper, you may need to show proof that the application was submitted before the permit expired. Keep the complete submission record and delivery confirmation in your files.

Can your employer keep paying you?

An expired temporary SIN does not by itself mean that payroll must stop when you’re legally authorized to keep working under maintained status. The important distinction is between the SIN record and your authorization to work.

Tell payroll or HR promptly, provide the immigration documents they need, and ask them to record that your work authorization is being maintained while the application is pending. Your employer may need to follow its own document-verification and payroll procedures, but the official SIN guidance recognizes that temporary residents can continue working and using their SIN under the same conditions while waiting for a permit-renewal decision.

Do not create a second SIN or ask for a new number because the expiry date has passed. A temporary SIN normally stays associated with you; the expiry information is updated after you receive a new immigration document.

What you can and cannot do while waiting

Situation	What it usually means
Work permit extension submitted before expiry	You may keep working in Canada under the original permit conditions while waiting.
Temporary SIN expired during that period	You may continue using the SIN while maintained status applies.
Employer-specific permit	Continue with the same employer, job, and work location unless separately authorized.
Open work permit	You can generally change employers or jobs, subject to permit conditions.
Visitor record application only	You normally cannot keep working after the work permit expires.
Study permit application only	You normally cannot keep working after the work permit expires.
Application submitted after permit expiry	You may need restoration and usually cannot work until authorized.
Leaving Canada while waiting	Your ability to work when you return can be affected. Check the travel rules before leaving.

When and how to update your SIN

You generally cannot update the expiry date on a temporary SIN while your work permit is expired and your application is still being processed. Wait until IRCC issues the new work permit.

After approval, apply to update the SIN record using the new work permit. The expiry date on the SIN record should match the expiry date on the immigration document that authorizes you to work.

You can apply online, by mail, or in person through Service Canada. Online applications are usually the most convenient. Service Canada says online processing is normally about five business days when the application is complete, while mail applications can take longer.

Apply to update your temporary SIN

Documents to have ready

For a temporary resident updating a SIN, expect to provide the new work permit and identity documents requested by Service Canada. Documents that are not in English or French may require an acceptable translation.

After the new SIN record is issued, check the expiry date and keep the confirmation securely. Service Canada no longer routinely issues plastic SIN cards. If you previously had a paper SIN document, follow Service Canada’s instructions for disposing of the old document after the record is updated.

How to check the permit application while you wait

If you applied online, sign in to your IRCC secure account and look under your submitted applications for status updates and messages. Keep checking the account you used for the application, including requests for additional documents.

If you applied on paper, you may be able to link the application to an online account. Keep your application number, passport details, and copies of the full submission package available.

Link a paper application to your IRCC secure account

Check your IRCC work permit application status

If you need to report a change or ask IRCC about an application, use the official IRCC web form rather than sending documents to an unofficial service or consultant. Keep a copy of anything you submit.

IRCC web form

What happens after the work permit decision?

If IRCC approves the application, review the new permit carefully. Confirm the employer, occupation, location, dates, and any restrictions. Then update your SIN record as soon as practical and provide the new work authorization information to your employer.

If the application is refused, read the refusal letter immediately. Your right to work may end when IRCC communicates the decision, depending on the circumstances. Do not assume that an expired SIN, an old WP-EXT letter, or continued payroll automatically gives you permission to keep working after a refusal.

If your personal circumstances are complicated—for example, you changed employers, left Canada, applied late, or received a refusal—consider getting advice from a licensed Canadian immigration professional before continuing to work.

Common mistakes to avoid

Applying for a SIN update too early: Service Canada generally needs the new work permit, not only proof that an application is pending.
Changing jobs on an employer-specific permit: Maintained status normally preserves the old conditions; it does not automatically approve the new job.
Using a visitor or study application as work authorization: Those applications do not normally extend the right to work.
Leaving Canada without checking the consequences: Travel can affect your ability to work when you return.
Sending your SIN to an unofficial website: Use Canada.ca or an official Government of Canada account and be cautious of calls, texts, or emails asking for personal information.

Your safest next step is to gather the expired permit, proof of the timely work permit application, and any WP-EXT letter, then give that package to your employer’s HR or payroll team. After IRCC issues the new permit, update the SIN through Service Canada.

Helpful Links

SIN for temporary residents in Canada – Confirm the rules for using an expired temporary SIN while maintaining status and learn when to update the SIN.
Extend or change the conditions on your work permit – Review maintained-status rules, work conditions, travel cautions, and proof of authorization while waiting.
Social Insurance Number: Apply – Apply online, by mail, or in person to update a temporary SIN after receiving a new work permit.
How to check the status of your IRCC application – Check online application messages, link a paper application, and find current IRCC processing information.
Social Insurance Number Code of Practice – Review official guidance for employees and employers about temporary SINs, maintained status, and document updates.
My work permit expired, but I’ve maintained my status. Can I keep working under the same conditions of my initial work permit if my Social Insurance Number (SIN) is expired? – Official page referenced in the article.
Sign in to your IRCC secure account – Official page referenced in the article.
Link an application to your IRCC secure account – Official page referenced in the article.

Frequently Asked Questions

Q. Can I work if my SIN expired but my work permit application is still processing?

A. Usually, yes, if you applied to extend or change your work permit before it expired, remain in Canada, and continue under the conditions of the original permit. Your expired SIN does not by itself end that work authorization.

Q. Can I update my SIN using only my work permit extension application receipt?

A. Generally, no. While you’re on maintained status, Service Canada normally cannot update the SIN expiry date until you receive the new work permit. Apply with the new permit once IRCC approves the application.

Q. What if my employer says an expired SIN cannot be used?

A. Give HR or payroll your expired work permit, proof that you applied before expiry, and your WP-EXT letter if available. Explain that you are relying on maintained status. If the issue continues, ask the employer to review the official IRCC and Service Canada guidance or contact the appropriate government office.

Q. Can I change employers while waiting for a work permit extension?

A. It depends on the original permit. An open work permit usually allows changes subject to its conditions. An employer-specific permit normally requires you to remain with the named employer, job, and location until the new authorization permits the change.