Work Authorization Letters in Canada: WP-EXT

Work authorization letters explain when IRCC allows people to continue working while their work permit applications are pending. They are proof letters, not work permits.

This article explains the two main legal provisions behind these letters: paragraphs 186(u) and 186(w) of the Immigration and Refugee Protection Regulations (IRPR). The distinction matters. It affects whether the person may continue working, what conditions apply, what happens after travel outside Canada, and how employers should understand the letter.

Why the old “transitional work permit” or “interim work permit” labels are not accurate

The phrases “transitional work permit” and “interim work permit” became common because IRCC began issuing letters to people who had applied online for new work permits from inside Canada. These letters helped applicants reassure employers, provincial health authorities, and sometimes other institutions that they had ongoing work authorization while waiting for IRCC.

However, the letter itself is not the legal source of the work authorization. The source is the law, especially IRPR 183 and IRPR 186. The letter only explains or confirms how the law may apply to the person’s pending application.

This difference is not technical wording for its own sake. It can change the outcome. A person may have legal work authorization even if they did not receive the letter. In other cases, a person may have a letter but still lose the ability to work if they no longer meet the legal conditions.

Therefore, the better term is not “interim work permit” or “transitional work permit.” A more accurate expression is a work authorization letter or a proof-of-authorized-work letter.

What work authorization letters are

IRCC currently uses different proof documents depending on the application type.

For most online work permit extension or change applications, IRCC may issue a “WP-EXT except PGWP” letter. This letter is for workers who applied online to extend or change their work permit and who may continue working under the same conditions while IRCC processes the application.

For post-graduation work permit applicants, IRCC may issue a WP-EXT for PGWP, also known as IMM 0127 E. This is a different type of proof letter. It relates to eligible former students who applied for a PGWP before their study permit expired.

The two letters look similar in purpose, but they rest on different legal provisions:

1. R186(u) usually applies to people who already held a work permit and applied to extend or change it before expiry.
2. R186(w) usually applies to eligible students or former students who completed a program and applied for a PGWP before their study permit expired.

The distinction is important because the travel consequences are different.

The 365-day date on WP-EXT, except PGWP letters

IRCC now states that the WP-EXT letter, except for PGWP, automatically lists an expiry date 365 days from the date IRCC receives the application.

This date is on the letter because many employers, health insurance providers, and other institutions want a visible expiry date. It does not mean that the person’s work authorization necessarily ends on that date.

If IRCC has not finalized the application by the date shown on the letter, the person may continue working until IRCC makes a decision, provided they still meet the legal conditions. For R186(u), this generally means the person applied before the previous work permit expired, remained in Canada, and continued to comply with the conditions of the expired work permit, except for the expiry date.

This is a major practical update. Earlier versions of these letters often caused difficulty because the short printed validity period looked like a hard stop. The current 365-day format should reduce confusion, but it still does not turn the letter into a work permit.

Work authorization letters under R186(u)

Paragraph 186(u) applies to many work permit extension situations. It allows a foreign national to work in Canada without a work permit until a decision is made on an application under subsection 201(1), if both of the following are true:

1. The person remained in Canada after their work permit expired.
2. The person continued to comply with the conditions of the expired work permit, except for the expiry date.

This is the common maintained-status work scenario. A worker has a valid work permit. Before it expires, they submit an application to extend or change their work permit from inside Canada. If the original work permit expires before IRCC decides the new application, they may continue working, but only under the rules that apply to their situation.

The same conditions usually mean the same conditions

For an employer-specific work permit holder, “same conditions” usually means the same employer, occupation, and work location as on the expired work permit.

For an open work permit holder, the situation is usually broader. They may generally change employers, jobs, or locations, unless the work permit itself includes specific restrictions.

The WP-EXT, except for the PGWP letter, does not expand the conditions of the expired work permit. It helps to prove that the person may continue working under the same conditions while the application is pending.

Changing employers under R186(u)

A common mistake is assuming that a pending employer-specific work permit application allows the worker to start the new job immediately. That is not the basic R186(u) rule.

If the person is on an employer-specific work permit and applies to change employers, they generally cannot start working for the new employer, even if they submitted the new application. They must either wait until the new work permit is approved or obtain a separate authorization from IRCC to work while the application is pending.

IRCC has a process for requesting this separate authorization through the web form. The response email from IRCC can allow the person to start the new job before the new work permit is issued. That email is not a work permit either.

This point matters because there can be more than one document in the file:

1. The expired work permit.
2. The acknowledgement of receipt or application confirmation.
3. The WP-EXT except PGWP letter.
4. A separate IRCC authorization to change employers before approval, if requested and granted.
5. The new work permit, if approved.

Each document does something different.

Travel under R186(u)

Travel is one of the most important differences between R186(u) and R186(w).

Under R186(u), a person’s ability to work while awaiting a decision depends on remaining in Canada. If the person leaves Canada after the original work permit has expired and before IRCC approves an extension or a new work permit, they may lose the ability to work upon return.

IRCC explains that a person who applied to extend a work permit may leave Canada and return, but several things may happen upon return. If IRCC has not yet approved the work permit extension, the person may be allowed back into Canada as a visitor. If that happens, they cannot work until they receive the work permit extension.

If IRCC approves the work permit while the person is outside Canada, the person may be allowed to return as a worker. In some cases, a person may be asked to apply at a port of entry, but this is not always available. Since 2024/12/23, most foreign nationals in Canada have been required to apply online for initial work permits and work permit extensions rather than relying on port-of-entry applications.

The practical advice is simple: if someone is relying on R186(u) to keep working, they should be very cautious about leaving Canada before IRCC approves the new work permit.

Work authorization letters under R186(w)

Paragraph 186(w) is different. It mainly matters for PGWP applicants.

R186(w) applies to a person who is or was the holder of a study permit, has completed their program of study, met the off-campus work requirements in R186(v), applied for a work permit before the study permit expired, and is still waiting for a decision.

In practical terms, this is the student-to-worker bridge for eligible PGWP applicants. The person is not relying on an expired work permit. They are relying on a special regulatory provision for former students who meet the PGWP waiting-period conditions.

IRCC says a PGWP applicant can work full-time while IRCC processes the PGWP application if, at the time of application, they:

1. Had a valid study permit.
2. Completed their study program.
3. Were eligible to work off campus without a work permit while studying.
4. Did not work more hours than they were allowed to work while studying.

This is why R186(w) is not the same as R186(u). R186(u) continues work authorization from a previous work permit. R186(w) creates work authorization for eligible former students waiting for a work permit decision.

The PGWP proof package

A PGWP applicant should not rely only on the WP-EXT for the PGWP letter. IRCC’s public guidance tells applicants to show a potential employer a package of documents, including:

1. Proof of program completion, such as a completion letter or transcript.
2. A copy of the study permit.
3. The acknowledgement of receipt for the PGWP application, if applied online.
4. The WP-EXT for PGWP, IMM 0127 E, if received.

The study permit should include wording that permits work on or off campus if the person meets the eligibility criteria under R186(f), R186(v), or R186(w). The PGWP acknowledgement of receipt should have been received before the study permit expired.

At the time of writing, one IRCC Help Centre page still refers to a 180-day validity period for the WP-EXT for PGWP letter. However, IRCC’s PGWP guidance also states that the person may continue working until IRCC makes a decision, even if the letter’s validity period expires. Therefore, the legal and practical focus should remain on R186(w) eligibility and the pending PGWP application, not only on the printed date on the letter.

Travel under R186(w)

Travel works differently for eligible PGWP applicants relying on R186(w).

IRCC states that if a PGWP applicant leaves and re-enters Canada after applying for a PGWP, they can still work full-time while awaiting a decision. Leaving and re-entering Canada does not stop them from working full-time while they wait, provided they meet the conditions for working while the PGWP is pending.

This is an important distinction from R186(u).

However, travel is still not risk-free. The person must have the required entry document, such as a valid temporary resident visa or, if applicable, an electronic travel authorization. They must also satisfy the border services officer that they meet the ordinary requirements for entry to Canada.

The point is not that travel is automatically safe. The point is that R186(w) does not have the same “stay in Canada to keep working” limitation that applies under R186(u).

R186(u) and R186(w) compared

If the letter expires before IRCC decides

For WP-EXT except PGWP letters, IRCC now says the letter expires 365 days after IRCC receives the application. If IRCC does not decide by that date, the person may still be able to keep working until a decision is made. The person can show the IRCC’s public webpage to employers or others who need proof.

For WP-EXT for PGWP letters, IRCC says the person may continue working until a decision is made, even if the validity period of the letter expires, provided they meet the conditions to work while the PGWP application is pending.

In both situations, the printed date on the letter should not be treated as the only legal test.

If the person applied late

Timing is crucial.

If a work permit holder applies to extend or change their work permit after their previous permit has expired, they generally do not benefit from the same ongoing work authorization. They may need to apply for restoration and should not work while awaiting approval.

Similarly, a PGWP applicant who applies after the study permit expires may not be able to rely on R186(w). R186(w) requires that the person apply for the work permit before the study permit expires.

Late filing can therefore change the entire analysis.

First work permits in Canada

IRCC says some applicants will not receive the WP-EXT except for the PGWP letter. This includes people who applied after their work permit had expired, as well as those applying for their first work permit in Canada.

That does not contradict the PGWP situation. PGWP applicants may receive a separate WP-EXT for PGWP letter because their situation is governed by R186(w), not R186(u).

This is another reason not to treat all work authorization letters as the same document.

SIN, employers, and practical proof

Employers often ask for a new work permit, a renewed SIN, or a letter with a future expiry date. The problem is that the law may allow the person to work before they receive a new work permit or a new SIN expiry date.

For a worker on maintained status after applying to extend a work permit, IRCC says the person can keep working even if the SIN has expired, provided they applied before the initial work permit expired and continue under the same conditions. The person can renew the SIN after receiving the new work permit.

For employers, the practical question is not simply “Do you have a new work permit?” A better question is:

1. Did you apply before your previous permit expired?
2. What was your previous status document?
3. Which IRPR paragraph applies, R186(u) or R186(w)?
4. Are you still in Canada, if relying on R186(u)?
5. Are you working under the same conditions if relying on R186(u)?
6. Do you have the documents IRCC says can prove your ability to work?
7. Has IRCC made a decision?

Common mistakes

Mistake 1: Treating the letter as a work permit

A WP-EXT letter is not a work permit. It is proof or explanation of work authorization while an application is pending.

Mistake 2: Ignoring the difference between R186(u) and R186(w)

R186(u) and R186(w) have different eligibility requirements and different travel consequences. Mixing them up can lead to unauthorized work.

Mistake 3: Assuming the printed letter date always ends the work authorization

For both WP-EXT and WP-EXT for PGWP situations, IRCC guidance may allow continued work after the letter’s printed validity date if the application remains pending and the person still meets the legal conditions.

Mistake 4: Travelling while relying on R186(u)

A worker relying on R186(u) may be able to re-enter Canada as a visitor, but they may not be allowed to work after return until IRCC approves the new work permit.

Mistake 5: Changing employers too early

A worker on an employer-specific work permit cannot usually start working for a new employer just because a new work permit application has been submitted. They need approval of the new work permit or separate authorization from IRCC to work while the application is pending.

Final thoughts

Work authorization letters are useful, but they should be read as proof documents, not as permits. The legal analysis comes first.

For most work permit extension cases, the analysis starts with R186(u): Was there a valid work permit, was the new application submitted before expiry, did the person remain in Canada, and are they still respecting the same work conditions?

For PGWP applicants, the analysis starts with R186(w): Did the person have a valid study permit when applying, complete the program, qualify for off-campus work, avoid exceeding the permitted hours, and apply before the study permit expired?

The document in the IRCC account may help explain the answer, but it is not the answer by itself. Book an appointment if you wish to explore your options.

Sources

1. https://www.settler.ca/english/transitional-work-permit-for-inside-canada-applicants/
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters need clearer explanation than the older transitional work permit article provided.
2. https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/extend/after-apply.html
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters can show proof of continued work while IRCC processes an online extension.
3. https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/extend/expired-permit.html
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters do not replace the need to apply before expiry and stay within the same work conditions.
4. https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=188&top=17
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters should be assessed with maintained status and the requirement to stay in Canada.
5. https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=189
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters can help prove continued work if the worker applied before the permit expired.
6. https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=190&top=17
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters do not prevent travel from affecting R186(u) work after return to Canada.
7. https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=171
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters must be read with the rule that many workers lose work ability after travel.
8. https://www.canada.ca/en/immigration-refugees-citizenship/services/study-canada/work/after-graduation/after-you-apply.html
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters for PGWP applicants operate under different R186(w) travel rules.
9. https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=1507&top=15
   • Key phrase: work authorization letters
   • Excerpt: Work authorization letters for PGWP applicants should be shown with completion proof, study permit, and AOR.
10. https://ircc.canada.ca/english/helpcentre/answer.asp?qnum=1505&top=17
    • Key phrase: work authorization letters
    • Excerpt: Work authorization letters may support employment even where the SIN expiry has not yet been updated.
11. https://laws-lois.justice.gc.ca/eng/regulations/SOR-2002-227/section-183.html
    • Key phrase: work authorization letters
    • Excerpt: Work authorization letters must be read with IRPR 183 on maintained temporary resident status.
12. https://laws-lois.justice.gc.ca/eng/regulations/SOR-2002-227/section-186.html
    • Key phrase: work authorization letters
    • Excerpt: Work authorization letters rely on IRPR 186(u) or 186(w), depending on the applicant’s situation.
13. https://www.canada.ca/en/immigration-refugees-citizenship/services/work-canada/extend/change-jobs-employers.html
    • Key phrase: work authorization letters
    • Excerpt: Work authorization letters do not automatically authorize a new employer before IRCC grants permission.

Disclaimer: This article is for general information only. It is not legal advice or immigration advice for a specific person. Immigration rules and IRCC instructions can change without notice. For advice about a specific case, consult a qualified Canadian immigration professional.