OAS Optimization Strategies for Ontario Retirees (2026 Guide)

Your OAS Is Worth More Than You Think — If You Plan for It

Old Age Security is one of the most misunderstood parts of Canadian retirement income. Most retirees treat it as a guaranteed payment that simply shows up at 65, and they give it no more thought than that. But OAS involves real decisions with real dollar consequences — when to start it, how to protect it from the clawback, and how to coordinate it with your other income sources.

I work with retirees across London and Southwestern Ontario who are often surprised to learn that a few straightforward planning moves can mean keeping thousands of extra dollars in OAS benefits each year. This guide walks through the OAS system as it stands in 2026 and the specific strategies that make the biggest difference for Ontario retirees.

OAS Basics: Eligibility and Amounts in 2026

Old Age Security is a monthly payment available to most Canadians aged 65 and older. Unlike CPP, OAS is not based on your work history or contributions. It is funded from general government revenues, and eligibility is based primarily on how long you have lived in Canada.

Eligibility Requirements

To receive a full OAS pension, you generally need to have lived in Canada for at least 40 years after turning 18. If you have lived here for at least 10 years after age 18, you may qualify for a partial pension based on your years of residence.

You must also be a Canadian citizen or legal resident at the time your OAS application is approved. For those living outside Canada, you need at least 20 years of Canadian residence after age 18 to receive OAS abroad.

2026 OAS Payment Amounts

OAS payments are adjusted quarterly for inflation. For early 2026, the maximum monthly OAS payment is approximately:

• Ages 65 to 74: $727.67 per month ($8,732 per year)
• Ages 75 and older: $800.44 per month ($9,605 per year)

The 10 percent increase for those 75 and older was introduced in 2022 and is now built into the base calculation. If you have fewer than 40 years of Canadian residence, your OAS is prorated. For example, 30 years of residence would give you 30/40ths, or 75 percent, of the maximum payment.

The OAS Clawback: How the Recovery Tax Works

This is the part of OAS that catches many Ontario retirees off guard. If your individual net income exceeds a certain threshold, you begin to lose your OAS benefits to what is officially called the OAS pension recovery tax — commonly known as the clawback.

2026 Clawback Thresholds

For the July 2026 to June 2027 payment period (based on your 2025 tax return), the clawback threshold is approximately $90,997. For every dollar of net income above this threshold, you lose 15 cents of OAS.

The full repayment threshold — the income level where your entire OAS is clawed back to zero — is approximately $148,179 for those aged 65 to 74, and $154,036 for those 75 and older (since their base OAS is higher, it takes more income to claw it back entirely).

A Practical Example

Say you are a 67-year-old London, Ontario retiree with the following income:

• Workplace pension: $45,000
• RRIF withdrawal: $25,000
• CPP: $14,000
• OAS: $8,732

Your total net income is approximately $92,732. That puts you $1,735 above the $90,997 threshold. The clawback is 15 percent of the excess: $1,735 x 0.15 = $260 clawed back over the following payment year.

That might seem modest. But consider a retiree with a larger RRIF or a capital gain from a property sale pushing income to $120,000. The excess above $90,997 is $29,003, and the clawback is $29,003 x 0.15 = $4,350. That is half the OAS benefit gone in a single year.

The clawback creates what is effectively an extra 15 percent marginal tax rate on income between $90,997 and $148,179. When you add that to Ontario's regular combined federal-provincial marginal rate of approximately 29.65 to 33.89 percent in that range, you are looking at an effective marginal rate approaching 45 to 49 percent. This is one of the highest effective tax rates any Canadian faces, and it hits middle-income retirees hardest.

What Counts as Income for the Clawback

The clawback is based on line 23600 of your tax return — your net income. This includes:

• Employment and self-employment income
• CPP and OAS payments
• RRSP and RRIF withdrawals
• Workplace pension income
• Taxable capital gains (50 percent of capital gains)
• Rental income
• Interest and taxable dividends (grossed-up amount for eligible dividends)
• Foreign pension income

Critically, TFSA withdrawals do not count. Neither does the return of capital portion of non-registered investments, which makes these tools central to any OAS optimization strategy.

Deferring OAS: The 36 Percent Increase

Just like CPP has a deferral option, you can choose to delay your OAS start date beyond age 65, up to a maximum of age 70. For each month you defer, your OAS increases by 0.6 percent. Over the full five-year deferral period, that adds up to a 36 percent permanent increase.

The Deferral Math

Using the 2026 maximum for ages 65 to 74:

| Start Age | Monthly Amount | Annual Amount | |-----------|---------------|---------------| | 65 | $727.67 | $8,732 | | 66 | $780.07 | $9,361 | | 67 | $832.47 | $9,990 | | 68 | $884.87 | $10,618 | | 69 | $937.27 | $11,247 | | 70 | $989.63 | $11,876 |

That is an extra $3,144 per year for life by waiting until 70. The break-even age — where total cumulative payments from deferring surpass what you would have received starting at 65 — is approximately age 82 to 83.

When Deferral Makes Sense

Deferring OAS is worth considering if:

• You have other income sources (TFSA, non-registered accounts, a working spouse) to cover your expenses between 65 and 70
• You are in good health and expect to live past your early 80s
• Your income between 65 and 70 would trigger the clawback anyway, meaning you would lose part of the OAS benefit to the recovery tax
• You want a higher guaranteed, inflation-indexed income stream later in retirement when you may have fewer other resources

The last point is especially powerful. If your income between ages 65 and 70 is high enough that a significant portion of OAS would be clawed back, deferring means you avoid the clawback entirely during those years and receive a larger benefit starting at 70 when your other income may be lower.

When Deferral Does Not Make Sense

Do not defer OAS if:

• You need the income now to cover basic expenses
• You have serious health concerns that make living past 82 unlikely
• Your income is comfortably below the clawback threshold and will remain there
• You have no other tax-efficient income sources to draw on between 65 and 70

Unlike CPP, there is no option to retroactively request OAS for periods before your application. If you defer and then change your mind, you can request up to 11 months of retroactive payments, but you cannot go back further than that.

Five Strategies to Avoid or Reduce the OAS Clawback

The clawback is not inevitable for higher-income retirees. With advance planning, many Ontario retirees can keep their income below or near the threshold. Here are the strategies I use most often with clients.

1. TFSA Withdrawals Instead of RRIF Withdrawals

TFSA withdrawals do not appear on your tax return and do not count toward the OAS clawback calculation. If you have been building up your TFSA throughout your working years, retirement is when it pays off most dramatically.

Instead of pulling $20,000 from your RRIF to fund a trip or a home renovation, pull it from your TFSA. That $20,000 stays off your net income line, which could save you $3,000 in OAS clawback (15 percent of $20,000) plus the income tax you would have paid on the RRIF withdrawal.

I have written a full guide on how to use your TFSA strategically in retirement. For OAS clawback purposes, your TFSA is your most important tool.

2. The RRSP Meltdown Before Age 65

One of the best ways to reduce clawback risk is to shrink your RRSP before OAS begins. The RRSP meltdown strategy involves making deliberate RRSP withdrawals during lower-income years — typically between retirement and age 65 — when your marginal tax rate is at its lowest.

If you retire at 60 with no pension income, your taxable income could be near zero. Withdrawing $50,000 to $55,000 per year from your RRSP during ages 60 to 64 keeps you in the lower brackets (approximately 20.05 percent combined in Ontario) while reducing the RRSP balance that would otherwise force large RRIF withdrawals later. Smaller RRIF withdrawals after 65 mean less clawback.

A retiree who melts down $250,000 of RRSP between ages 60 and 64 might save $40,000 or more in combined taxes and OAS clawback over their retirement compared to someone who waits for mandatory RRIF withdrawals at 72.

3. Pension Income Splitting

If you are married or in a common-law relationship, pension income splitting allows you to allocate up to 50 percent of eligible pension income to your spouse on your tax returns. This can pull the higher-income spouse below the clawback threshold.

For example, if one spouse has $110,000 in net income (triggering a $2,850 clawback) and the other has $40,000, splitting $30,000 of pension income to the lower-income spouse drops the first spouse to $80,000 — well below the threshold — and brings the second spouse to $70,000, also below the threshold. The result: zero clawback for both, saving $2,850 per year in OAS plus significant income tax savings from equalizing tax brackets.

Eligible pension income for splitting includes workplace pension payments and RRIF withdrawals (after age 65). CPP has its own separate sharing mechanism. OAS itself cannot be split.

4. Spousal RRSP Contributions

If you are still working and your spouse has lower income or is younger, contributing to a spousal RRSP shifts future retirement income from the higher-income spouse to the lower-income spouse. When the spousal RRSP is eventually withdrawn in retirement (as long as the three-year attribution rule has passed), it is taxed in the lower-income spouse's hands.

This is a proactive strategy that needs to be set up years before retirement, but it pays dividends by helping equalize retirement income between spouses and keeping both below the clawback threshold.

5. Capital Gains Timing and Planning

Since 50 percent of capital gains are included in net income, a large taxable gain in a single year can push you over the clawback threshold even if your regular income is well below it. Selling a rental property or a concentrated stock position can trigger a significant one-time clawback.

Where possible, consider:

• Spreading asset sales across multiple tax years
• Harvesting capital losses to offset gains
• Holding growth-oriented investments inside your TFSA to shelter gains entirely
• Timing major dispositions for a year when your other income is lower

A $200,000 capital gain creates $100,000 of taxable income. If your other income is $60,000, your total reaches $160,000 — enough to claw back your entire OAS for the year and push you into the highest Ontario tax brackets.

GIS Considerations for Lower-Income Retirees

While the clawback affects higher-income retirees, lower-income retirees face a different OAS-related consideration: the Guaranteed Income Supplement (GIS).

GIS is an additional monthly payment for OAS recipients with low income. For a single retiree, the maximum GIS in early 2026 is approximately $1,086 per month. The income threshold for receiving any GIS is approximately $21,768 for single recipients (excluding OAS itself).

GIS is income-tested, and the clawback rate on GIS is steep — 50 percent for employment income (after a $5,000 exemption) and 75 percent for most other income including RRIF withdrawals. This creates effective marginal tax rates above 70 percent for some lower-income retirees.

If you or your spouse may qualify for GIS, the planning priorities shift:

• TFSA withdrawals are critical because they do not affect GIS eligibility
• RRSP withdrawals before 65 are especially valuable to reduce the RRIF balances that would reduce GIS later
• Delaying CPP may actually hurt you if it causes you to draw on RRSP or RRIF income before 65, since CPP income is exempt from GIS calculation up to a point (the CPP retirement pension is only partially included in GIS income calculations)

GIS planning is complex and the rules interact in counterintuitive ways. If your retirement income is in the GIS range, professional retirement planning help can make a very significant difference.

OAS for Non-Residents and Those With Partial Residence

Ontario retirees who plan to spend part of the year abroad or who immigrated to Canada later in life face additional OAS considerations.

Spending Winters Abroad

If you remain a Canadian resident for tax purposes, living part of the year in Florida or elsewhere does not affect your OAS. You continue to receive full benefits and file Canadian taxes normally. For a full breakdown of the residency rules and financial considerations, see our snowbird financial planning guide. However, if you become a non-resident of Canada, a 25 percent non-resident withholding tax applies to OAS payments (unless a tax treaty with your new country of residence reduces the rate).

Partial OAS for Immigrants

If you arrived in Canada at age 35, you would have 30 years of residence by age 65 — qualifying for 30/40ths (75 percent) of the maximum OAS. This means about $6,549 per year instead of the full $8,732. You can still defer your partial OAS for the 36 percent increase. At age 70, that 75 percent pension would grow from $6,549 to approximately $8,907.

International Social Security Agreements

Canada has social security agreements with many countries that may allow you to count periods of residence or contributions in those countries toward OAS eligibility. If you have lived and worked in another country, it is worth checking whether an agreement applies.

Common OAS Mistakes I See in Ontario

After working with hundreds of retirees in this area, these are the mistakes that come up most frequently:

Not applying on time. OAS is not automatic. You need to apply, and Service Canada recommends doing so six months before you want payments to begin. Some people are selected for automatic enrolment, but many are not. Delayed applications can only be backdated 11 months.

Ignoring the clawback until it happens. Many retirees do not realize they are in clawback territory until they see the reduction on their July payment. By then, the tax year that caused it is already closed. Proactive tax planning is the only way to manage this.

Cashing out a large RRSP in one year. I have seen retirees withdraw $150,000 or more from their RRSP in a single year to pay off a mortgage or fund a renovation. The tax hit is severe, and the OAS clawback adds insult to injury. Spreading the withdrawal over multiple years or using TFSA and non-registered assets first would have saved them thousands.

Not coordinating with CPP timing. Your OAS and CPP decisions should be made together, not independently. Deferring both, deferring one but not the other, or starting both early all have different tax and clawback implications depending on your full financial picture.

Forgetting the dividend gross-up. Canadian eligible dividends are grossed up by 38 percent before being included in net income. A portfolio generating $30,000 in eligible dividends adds $41,400 to your net income for OAS clawback purposes — even though you only received $30,000. This often pushes retirees over the threshold unexpectedly.

Not considering both spouses together. OAS is calculated on individual income, but many of the strategies to manage it — pension splitting, spousal RRSPs, income equalization — involve both spouses. Planning for one spouse in isolation usually leaves savings on the table.

Building an OAS Strategy That Works

OAS optimization is not a single decision. It is part of a broader retirement income plan that coordinates your CPP timing, RRSP drawdown, TFSA usage, pension income splitting, and investment structure. Each of these pieces affects the others, and the right approach depends on your specific situation — your income sources, your spouse's situation, your health, your goals, and your tax bracket.

The strategies in this guide can preserve thousands of dollars per year in OAS benefits for Ontario retirees who would otherwise lose them to the clawback. For a couple, the combined impact of pension splitting, RRSP meltdown timing, and TFSA coordination can easily exceed $5,000 to $8,000 per year in tax and clawback savings.

If you are approaching 65 or already receiving OAS and have not reviewed your clawback exposure, it is worth having a conversation. I work with retirees throughout London and Southwestern Ontario on exactly these kinds of decisions. You can learn more about how I work on my financial advisor page, or reach out to discuss your situation.