OAS Deferral Strategy 2026: Should You Delay Old Age Security to 70?

The OAS Deferral Decision: More Important Than Most Canadians Realize

Most Canadians simply take Old Age Security (OAS) at 65 because they become eligible and the money seems free. But for many retirees - particularly those with pension income, significant RRSP savings, or good health - deferring OAS to age 70 can mean tens of thousands of dollars more in lifetime income. In 2026, the stakes are higher than ever as OAS payments continue to be indexed to inflation.

The decision is not as simple as "take it now or take it later." It involves your health and longevity expectations, your income in early retirement (and how it interacts with the OAS clawback), your other retirement income sources, and your overall withdrawal sequencing strategy.

How OAS Deferral Works: The 0.6% Monthly Enhancement

The federal government allows you to delay taking OAS past your 65th birthday, with an enhancement of 0.6% per month deferred. This adds up quickly:

• Defer 1 year (to 66): OAS increases by 7.2%
• Defer 2 years (to 67): OAS increases by 14.4%
• Defer 3 years (to 68): OAS increases by 21.6%
• Defer 4 years (to 69): OAS increases by 28.8%
• Defer 5 years (to 70): OAS increases by 36% (maximum)

You cannot defer OAS past age 70. At 70, if you have not applied, Service Canada will automatically enroll you.

Break-Even Analysis: How Long You Need to Live for Deferral to Pay Off

The critical question for any OAS deferral decision is the break-even age - the point at which the cumulative enhanced payments from deferring exceed the cumulative payments you gave up during the deferral years.

Break-Even from Age 65 to 70

If you defer from 65 to 70, you forgo five years of OAS payments. The total foregone OAS (assuming the 2026 rate and modest 2% annual indexing over five years) is approximately:

• Year 1 (age 65): $742.31 x 12 = $8,908
• Year 2 (age 66): ~$9,086 (indexed)
• Year 3 (age 67): ~$9,268
• Year 4 (age 68): ~$9,453
• Year 5 (age 69): ~$9,642
• Total foregone: approximately $46,357

Starting at age 70, you receive $1,009.54/month instead of $742.31/month - a monthly advantage of $267.23 or $3,206.76 annually (growing with inflation). Dividing $45,443 by $3,206.76 gives approximately 14.5 years to break even from age 70 - meaning break-even at roughly age 84-85 in purely nominal terms.

However, if we account for the fact that OAS payments taken at 65 could be invested (even modestly at 3% real return), the break-even extends further. Conversely, if you factor in spending inflation and the longevity risk of living into your 90s, earlier break-even calculations favor deferral for healthy individuals.

The OAS Clawback: A Critical Factor for High Earners

The OAS Recovery Tax - commonly called the "clawback" - reduces your OAS by 15 cents for every dollar of net income above a threshold. In 2026, that threshold is approximately $95,323. Full OAS elimination occurs at approximately $154,708 income for the regular 65-74 age group.

If you are a high-income retiree - say, someone with a defined benefit pension paying $70,000 per year plus RRIF minimum withdrawals pushing income above $95,323 - you would face a partial or full OAS clawback at age 65 anyway. In this scenario, deferring OAS to 70 may make particular sense for two reasons:

1. You avoid years of clawed-back (reduced) OAS payments in your early retirement when income is highest.
2. By age 70, your income may decrease as you spend down RRSP/RRIF assets or draw other income sources lower - meaning the enhanced OAS at 70 may be received with less or no clawback.

Bridging the Gap: Income Sources During OAS Deferral (Ages 65-70)

The most common concern about deferring OAS is: "What do I live on between 65 and 70?" In practice, most Canadians who are candidates for OAS deferral have other income sources available. The key is sequencing them tax-efficiently.

Strategic RRSP Drawdowns in Early Retirement

One of the most powerful strategies in Canadian retirement planning is making deliberate RRSP withdrawals in the years before OAS and CPP begin - or in this case, during the OAS deferral window. If you are 65-70 and your income is low (before full CPP and OAS layer on), you are in a lower tax bracket. Drawing from your RRSP now fills those brackets tax-efficiently and reduces future RRIF minimum withdrawals, which can cause income spikes in your 70s and 80s.

Read our guide on retirement withdrawal sequence optimization for the full strategy, and our retirement income splitting guide for ways to reduce taxes as a couple.

TFSA as a Tax-Free Bridge

TFSA withdrawals are completely tax-free and do not count as income for OAS clawback or GIS eligibility calculations. Using TFSA withdrawals to bridge retirement income from 65 to 70 while deferring OAS is a highly tax-efficient strategy. You preserve higher-taxed RRSP/RRIF assets for later while drawing tax-free TFSA income in the interim.

OAS Deferral and CPP: Coordinating Your Government Benefits

OAS and CPP are independent programs. You can take CPP at any age from 60 to 70 without affecting your OAS deferral decision. The CPP timing decision has its own break-even analysis and considerations, but in general:

• Deferring both CPP and OAS to 70 maximizes monthly income but requires the most bridge funding
• Taking CPP early while deferring OAS is a middle-ground strategy that provides some income while still capturing the OAS enhancement
• Taking OAS at 65 while deferring CPP to 70 is less common but may suit some situations

For a complete picture of government retirement benefits including GIS eligibility, read our OAS, GIS, and CPP overview.

Who Should NOT Defer OAS

OAS deferral is not the right choice for everyone. Deferring is likely not optimal if:

• You have serious health issues reducing life expectancy well below age 83
• You need the income now and have no other bridge sources
• Your income in retirement is below the GIS threshold - taking OAS at 65 makes you eligible for Guaranteed Income Supplement sooner, which can be worth more than the deferral enhancement for lower-income seniors
• You have no confidence in longevity based on family history

Practical Steps: Making the OAS Deferral Decision

1. Project your retirement income from all sources (pension, CPP, RRSP/RRIF, TFSA, non-registered) and estimate your likely tax bracket from age 65 to 75.
2. Calculate your OAS clawback exposure - if you will be above $95,323 at age 65, deferral is worth serious consideration.
3. Use Service Canada's OAS calculator to confirm your exact benefit amount and deferral impact.
4. Model your break-even age given your investment return assumptions and health outlook.
5. Identify your bridge income sources - RRSP drawdowns, TFSA withdrawals, part-time work - and confirm you can fund 65-70 without OAS.
6. Apply for OAS or set a deferral calendar reminder - Service Canada will not automatically enroll you at 65 for deferral; you must either apply or simply not apply until you are ready.