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Applying for Old Age Security (OAS) doesn’t need to be complicated — but missing a step can delay your payments. This article explains who needs to apply, when and how to do it, and what documents to prepare so you can receive your benefit on time, whether you live in Canada or abroad.
Who is automatically enrolled and who needs to apply
Many Canadians are enrolled in OAS automatically. If Service Canada already has the required information, you’ll receive an enrolment letter around your 64th birthday. In that case, you don’t need to apply.
👉 However, you must apply manually if:
- You didn’t receive a letter one month after turning 64.
- The letter you received has incorrect information.
- You want to delay or change your benefit start date.
- You’ve already turned 65 and haven’t applied or delayed.
If in doubt, contact Service Canada to confirm your status.
When to apply for OAS
You can apply for Old Age Security as early as age 64 to begin receiving payments when you turn 65. If you want to delay your first payment for a higher monthly amount, you must apply no later than the month before you turn 70.
📌 If you delay too long, you risk losing benefits, since retroactive payments are limited to 11 months.
Required documents and information
Before starting your application, make sure you have the following:
- Proof of Canadian citizenship or legal residency.
- Your residential history since age 18.
- Banking information for direct deposit.
- Your desired pension start date.
- Your Social Insurance Number (SIN).
- If applicable:
- Income details for the past two years (if taxes weren’t filed with CRA).
- Spouse/partner’s information.
- Details of any international income.
- Information about reduced employment or pension income.
How to apply
You can apply in three ways: online, by mail, or in person.
➤ Online through My Service Canada Account (MSCA)
- Register or sign in to your My Service Canada Account.
- Go to the Old Age Security section.
- Choose to either:
- Apply or delay with a start date; or
- Delay without selecting a start date.
Ensure your multi-factor authentication is set up. If you have issues with GCKey or Interac® Sign-In, refer to the official support resources.
➤ By mail
- Download and complete form ISP-3550:
➡️ Application for the OAS and GIS - Mail it to the Service Canada office in your province or drop it off in person.
If someone is helping you, they must complete ISP-1603 (Consent to Communicate), but cannot apply or change payment details on your behalf.
📌 If you’re applying for someone who’s unable to manage their own benefits, submit ISP-3505 and the appropriate administrator agreement form (ISP-3506 or ISP-3507, depending on the case).
How to check your application status
To track your application:
- Sign in to your My Service Canada Account, or
- Call Service Canada
If approved, you’ll receive a letter with:
- Your payment amount.
- Your first payment date.
- Any retroactive amounts owed.
How long it takes to get a response
Processing time varies, but most applicants receive a decision within a few weeks.
⚠️ Delays may occur if your documents are incomplete or if additional information is needed.
What to do if you haven’t heard back
If you haven’t received a decision letter after several weeks, contact Service Canada to follow up. You can also check your MSCA account for updates.
Common mistakes when applying
To avoid delays or denial, watch out for the following:
- Applying too late (after age 70).
- Missing or incorrect documents.
- Failing to provide complete residential history.
- Selecting the wrong start date or failing to confirm it.
- Not updating Service Canada if your situation changes.
Applying from abroad
If you live outside Canada, you cannot apply online. Instead:
- Complete the paper application form (ISP-3550).
- Send it to the Service Canada office in the province or territory where you last resided.
- Include proof of legal status and residential history.
📢 For more on living abroad and receiving benefits, visit the OAS abroad guide.
What if you apply late or want retroactive payments?
If you apply after turning 65, you may be eligible for up to 11 months of retroactive payments. However, you cannot receive retroactive payments for months you chose to defer.
⚠️ Important: If you apply after turning 70, you risk losing benefits entirely, so it’s crucial to act before reaching that age.
If you need to apply for Old Age Security, make sure to do it early, completely, and correctly. Using your My Service Canada Account is the fastest and most reliable way to manage your application.
And remember: if you don’t hear from them, follow up — your retirement income depends on it.
