CPP + OAS Claiming-Age Comparison

Compare two CPP start ages and, separately, two OAS start ages. Use your official gross monthly estimates, not a maximum benefit or a salary-based guess. All amounts are in CAD regardless of the site's currency selector.

Gross, pre-tax illustration with benefit amounts held constant except for claiming-age adjustments and OAS's age-75 increase. Inflation indexing, OAS recovery tax, GIS, survivor benefits and pension sharing are not modeled. A break-even age is not a recommendation.

Your official estimates

Find CPP estimates through Service Canada's CPP amount guidance and My Service Canada Account. Obtain a personal gross OAS estimate from Service Canada. Both inputs should use the same dollar basis and exclude income tax or recovery deductions. Enter 0 for a benefit you wish to exclude; do not leave it blank.

Do not enter a combined CPP retirement/survivor benefit or QPP estimate. This model changes only the age factor on a fixed underlying entitlement; it cannot reproduce how future earnings, contribution years, dropout provisions or CPP enhancement change your official age-specific estimates.

For partial OAS, enter your own verified age-65 partial pension; do not multiply it by residence years again. The model freezes that underlying entitlement. If additional residence before claiming or international rules could change it, this comparison cannot capture that change; obtain age-specific advice from Service Canada.

Claiming ages (whole years only)

CPP and OAS need not start together. These are prospective alternatives, not a way to change a pension already in payment. The model omits retroactive applications and actual calendar payment dates.

Comparison window

The comparison birthday must not exceed lifespan. Present values for both CPP and OAS use the same age-60 valuation date. A discount rate expresses the value you place on earlier cash; it is not a forecast investment return.

Enter your estimates, confirm the assumptions, then compare.

Verified rules and eligibility

These are claiming-age rules, not a set of future payment amounts.

Formulas, timing and a hand-checkable example

CPP factor at age a = 1 - 0.006 × months before 65, or 1 + 0.007 × months after 65. The implied age-65 CPP base is the entered estimate divided by its reference-age factor. Each alternative uses that same base × its claiming-age factor. OAS factor = 1 + 0.006 × months deferred after 65. Monthly OAS becomes 1.10 × the adjusted pension from the month after 75.

The timeline starts at age 60. The first payment is modeled one month after the selected claiming birthday, paid at month end; the last payment is through the selected comparison or lifespan birthday. For example, 65 through 75 contains 120 payments with no age-75 uplift yet; the next month's payment includes the uplift. This is a monthly age-grid convention, not a prediction of your actual deposit dates or death-month entitlement.

Nominal cumulative benefits = sum of modeled gross monthly payments. Discounted value = sum of payment at month t ÷ (1 + annual discount rate)t/12, where t is months since age 60. With discount rate 0, discounted and nominal values are equal. No investment of received payments is modeled. Inflation indexing is excluded: both CPP and OAS would normally be indexed, but future indexing is not predicted here. Accordingly these are frozen-payment nominal illustrations, not forecasts of future dollar payments and not inflation-adjusted purchasing power.

Example, not an entitlement estimate: with an age-65 CPP estimate of CAD 1,000, starting at 60 gives CAD 640 and starting at 70 gives CAD 1,420 monthly. For 60 versus 65, the early claimant receives CAD 38,400 before the later claimant starts. The CAD 360 monthly difference takes 106.67 later-start payments to close; on this monthly grid the nominal catch-up is at 73 years 11 months. A positive discount rate normally pushes catch-up later or can prevent it within the search window.

For an illustrative age-65 OAS estimate of CAD 700, starting at 70 gives CAD 952 monthly, then CAD 1,047.20 from the month after 75. The 65-start pension becomes CAD 770. Catch-up for that pair is at 83 years 1 month on this grid, with no indexing or tax. A lower personal partial pension is scaled from the amount you enter; no personal benefit is inferred.

What is deliberately excluded

All results are before income tax, withholding and OAS recovery tax. The existing 2026 salary-tax module does not cover all retirement credits and adjustments, and neither it nor a verified single-year OAS threshold supports a lifetime after-tax projection. Future tax years and thresholds are not invented or frozen and reused. An after-tax break-even age could be different.

Survivor/death benefits, pension sharing, GIS, Allowance, QPP, CPP post-retirement benefits, additional contributions, changing OAS residence entitlement, international agreements and future rule changes are excluded. Received payments are summed, not reinvested. The tool does not price the savings needed to bridge a delay. Health, longevity, immediate income needs, other assets and survivor considerations matter; review those before deciding.

This is an educational scenario, not personalized financial or tax advice. See our disclosures and calculator methodology. Report an error.

Official sources

Maintenance: recheck these rules when Service Canada changes age adjustments, OAS uplift or eligibility. Refresh your official estimates before each use. No maximum payment amount or future tax threshold is embedded in this model.