CPP, OAS, and GIS: The Basics

TL;DR
CPP is based on what you contribute while working. OAS is based on residency. GIS is income‑tested support for low‑income seniors. These benefits affect your retirement plan and withdrawal strategy.

What Each Benefit Is

• CPP (Canada Pension Plan)
  A retirement benefit based on your earnings and contributions throughout your working life.

• OAS (Old Age Security)
  A government benefit based on how long you’ve lived in Canada, not how much you earned.

• GIS (Guaranteed Income Supplement)
  Extra support for low‑income seniors, based on income.

Why This Matters for FIRE
If you retire early, your CPP contributions may be lower. Your withdrawal strategy can affect OAS and GIS eligibility later. Understanding how these benefits work helps you plan more accurately.

Simple Takeaways

• CPP grows with consistent contributions
• OAS depends on residency
• GIS is income‑tested
• Higher retirement income can reduce certain benefits

What You Can Do Now

• Know your estimated CPP and OAS
• Plan a withdrawal strategy that considers taxes and benefit thresholds
• Avoid assumptions — use real numbers when you’re closer to retirement

Next Step:
Use diyFIRE’s Retirement Basics guide and revisit this annually as your plan evolves..