Line 11300 – Old age security (OAS) pension

If you received the Old Age Security (OAS) pension payments from Employment and Social Development Canada in 2025, you will get a T4A(OAS) slip.

What's on your T4(OAS) slip

• Box 18 – OAS pension amount
• Box 21 – Net amount of federal supplements (spouse's allowance and Guaranteed Income Supplement)
• Box 20 – Amounts recovered from your OAS pension due to an overpayment from a previous period

OAS repayment

You may have to repay part of your OAS benefits if your income is high on line 23500 of your return.

If the result of the following calculation is more than $93,454, you may have to repay OAS:

Non-residents

If you were a non-resident of Canada and received OAS pension in 2025, you may have to complete Form T1136, Old Age Security Return of Income (OASRI).

For more information, see Guide T4155, Old Age Security Return of Income (OASRI) Guide for Non-Residents, or contact the CRA.

If you need help

If you have not received your T4A(OAS) slip, visit Service Canada or call 1-800-277-9914.

To view your T4A(OAS) slip online, sign in to your CRA account.

Completing your tax return

Enter the following amounts from your T4A(OAS) slip on your return:

• Box 18 on line 11300
• Box 21 on line 14600
• Box 20 on line 23200

Forms and publications

• Income Tax Package
• Guide T4155, Old Age Security Return of Income Guide (OASRI) for Non-Residents
• Form T1136, Old Age Security Return of Income (OASRI)
• Form T1136-WS, Old Age Security Return of Income (OASRI) Worksheet

Related topics

• Line 12500 – Registered disability savings plan (RDSP) income
• Line 14600 – Net federal supplements paid
• Line 23200 – Other deductions 
• Line 23500 – Social benefits repayment