OAS & GIS Estimator

OAS & GIS — Complete Canadian Guide for 2025

Old Age Security (OAS) and the Guaranteed Income Supplement (GIS) are the two main federal retirement income programs available to Canadian seniors. Together with CPP, they form the foundation of retirement income for most Canadians.

OAS Eligibility Rules

OAS is available to Canadians 65+ who have lived in Canada for at least 10 years after age 18. Full OAS requires 40 years of residence — you receive 1/40th of the full amount for each qualifying year. If you lived outside Canada, international social security agreements may count foreign residence toward your eligibility.

The OAS Clawback

If your net income exceeds $90,997 (2025), CRA recovers 15 cents of OAS for every dollar above that threshold. OAS is fully eliminated at around $148,179 (ages 65–74) or $154,196 (75+). TFSA withdrawals and non-taxable income do not trigger the clawback — making TFSA an essential planning tool for high-income seniors.

Should You Defer OAS?

Deferring OAS to age 70 increases your monthly benefit by 36%. The break-even point versus taking OAS at 65 is typically around age 82–84. Deferral makes sense if you're still working (and would face clawback anyway), have other income sources, are in good health, or want to maximize lifetime benefits given a long life expectancy.

GIS — The Most Overlooked Benefit in Canada

The Guaranteed Income Supplement adds up to $1,057/month for eligible single seniors — completely tax-free. Despite this, many low-income seniors don't apply. GIS is income-tested based on the prior year's net income, excluding OAS. TFSA withdrawals, inheritances, and non-taxable amounts don't count. Apply at Service Canada or call 1-800-277-9914.

OAS and GIS amounts are indexed quarterly to inflation. Rates shown are Q1 2025. Actual amounts depend on complete income and residency history. Not financial advice — consult Service Canada or a financial planner for your exact entitlement.