CPP, OAS, and GIS: Canada's Public Retirement Benefits Explained

Canada’s public retirement system has three pillars: the Canada Pension Plan (CPP), Old Age Security (OAS), and the Guaranteed Income Supplement (GIS). Each has separate eligibility rules, claiming ages, and amounts. How you time each one—and coordinate with your private savings—has a significant impact on lifetime income.

The Three Public Pillars

Monthly maximums are rarely achieved in practice—average CPP is around $760/month and average OAS is close to maximum for eligible seniors.

Canada Pension Plan (CPP)

How CPP Is Calculated

CPP is based on your earnings history and contributions. The calculation uses your best 39 years of adjusted earnings between age 18 and 65 (with automatic drop-out provisions for low-earning years, child-rearing, and disability).

2025 CPP Contribution Rates:

Self-employed workers pay both employee and employer shares—effectively 11.9% on CPP1 earnings.

CPP Claiming Ages and Adjustments

Taking CPP early reduces it permanently. Deferring permanently increases it. The breakeven point (cumulative income equalises) is approximately age 74–76 for deferring from 65 to 70.

When to Take CPP

Old Age Security (OAS)

OAS is not earnings-based—it is paid based on years of Canadian residency after age 18. You need 40 years to receive the full amount; fewer years proportionally reduce it.

OAS Residency Requirements:

• 40 years in Canada → Full OAS
• Less than 40 years → 1/40 × full OAS per year of residence
• 10 years minimum (if you live in Canada when applying); 20 years (if outside Canada at time of application)

OAS Deferral

Like CPP, OAS can be deferred past 65 (up to age 70) for a 0.6% per month increase (7.2%/year, max 36% at 70).

OAS Clawback (Recovery Tax)

High-income seniors face an OAS recovery tax—effectively a clawback of OAS benefits:

Strategies to reduce OAS clawback:

• Draw down RRSP/RRIF before 65 to reduce registered income in OAS years
• Use TFSA withdrawals (not counted as income)
• Split eligible pension income with spouse
• Defer OAS until income drops below clawback threshold

Guaranteed Income Supplement (GIS)

GIS is a top-up for low-income OAS recipients. It is means-tested on the previous year’s income and is not taxable.

Income thresholds (approximate): GIS phases out at 50 cents per dollar of income above the threshold. For a single senior, GIS is eliminated at approximately $22,000 in annual income.

RRSP/RRIF and GIS: Withdrawals from registered accounts count as income and reduce GIS dollar-for-dollar at 50%. A senior relying on GIS should hold savings in a TFSA wherever possible to preserve GIS eligibility.

Decision Framework: Coordinating CPP, OAS, and Private Savings

Post-Retirement Benefits (PRB)

If you continue working and contributing to CPP after starting CPP benefits, you earn Post-Retirement Benefits. Each year of contributions adds an additional small monthly CPP payment for life. You can opt out of contributions after 65 if you choose (employees must apply; self-employed can simply not contribute).

QPP: Quebec’s Separate Plan

Quebec operates the Quebec Pension Plan (QPP) instead of CPP. QPP is broadly equivalent in structure but with some differences—contribution rates, enhancement timing, and disability provisions differ. Quebec residents contribute to QPP through their payroll; non-Quebec residents contribute to CPP. Entitlements are portable if you move between provinces.

International Pension Agreements

If you worked in another country, Canada has social security agreements with over 50 countries (including the US, UK, Australia, France, Germany, and others). These agreements allow you to combine contribution periods from both countries to qualify for benefits in each—useful if you didn’t meet the minimum contribution period in either country alone.

For Canadians who worked in the United States, your US Social Security credits and Canadian CPP credits may be combined to determine eligibility. Benefits are still paid separately by each country.

OAS for Canadians Living Abroad

OAS can be paid internationally, but the residency requirement applies based on total years in Canada (40 for full benefit; partial for fewer years). Non-resident recipients have 25% withholding tax deducted from OAS payments, unless reduced by a tax treaty (e.g., Canada-US treaty reduces withholding to 15%).

The Triple Lock guarantee (or its successor) does not apply to Canadians living in countries without a reciprocal social security agreement.

Survivor and Disability Benefits Under CPP

CPP is not only a retirement benefit—it also provides:

CPP disability converts to retirement CPP at age 65. Survivors receiving both a CPP retirement pension and a survivor’s pension receive the combined benefit but not the full sum of both—a combined adjustment applies.

Frequently Asked Questions

What if I never worked—do I still get CPP? No CPP, but you are eligible for OAS (if residency requirements are met) and GIS (if income qualifies). There is also Allowance for spouses aged 60–64 whose partner receives GIS.

Can I receive CPP while still working? Yes. You can take CPP as early as 60 and continue working. If under 65, CPP contributions continue automatically. After 65, you can opt out of further contributions. Working while collecting CPP earns Post-Retirement Benefits.

How do I apply for OAS and CPP? Apply through My Service Canada Account online or by mail. CPP requires an application; OAS may be automatically enrolled (Service Canada sends a notification letter). Apply 6–12 months before you want benefits to start.

Is OAS taxable? Yes. OAS is taxable income. Combined with CPP and private pension income, it is possible to owe significant tax on retirement income. Use pension splitting and RRSP/RRIF drawdown strategies to manage the effective rate.

What happens to CPP if I die before collecting? A CPP Death Benefit ($2,500 lump sum) is payable to the estate. A Survivor’s Pension may be payable to a spouse/common-law partner; amount depends on contributor’s record and survivor’s own CPP. Children under 18 (or in school under 25) may receive a Children’s Benefit.

Do I have to apply for GIS separately? No—GIS is automatically assessed when you apply for OAS. However, you must file a tax return each year, as GIS is recalculated annually based on prior year income. If you miss filing, GIS can be interrupted.

Related: TFSA and RRSP | Provincial Tax Guide | Canadian Mortgages

Phase 3 Cross-Market: Retirement Systems

Compare equivalent retirement frameworks across markets:

• US 401(k) Hub
• US IRA and Roth IRA Hub
• UK State Pension Hub
• UK ISA Basics Hub
• Canada TFSA and RRSP Hub

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

Reviewed by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.