OAS Calculator Canada 2026
Estimate your Old Age Security pension at any start age from 65 to 70. See the deferral bonus, OAS clawback, GIS eligibility, and break-even age comparison.
How OAS Works in Canada
Old Age Security is Canada's largest retirement program. Unlike CPP, OAS is funded from general tax revenues — you don't need to have worked or paid into CPP to receive it. Eligibility is based on Canadian residence, not employment history.
Apply 6–11 months before your chosen start date. Service Canada may enrol you automatically at 65 and send a letter — watch your mail around your 64th birthday.
You need 40 years of Canadian residence after age 18 for the full pension. 10–39 years earns you a prorated amount. 35 years = 35/40 = 87.5% of full OAS.
Every month you defer past 65 adds 0.6% permanently (7.2%/year). Deferring to 70 = +36%. The break-even vs. taking at 65 is roughly age 85 — if you expect to live longer, defer.
Frequently Asked Questions
Yes — OAS is fully taxable income. It is reported on your T4A(OAS) slip. However, GIS is not taxable. Many seniors request voluntary withholding from Service Canada to avoid a large tax bill at year end.
Yes, if you lived in Canada for at least 20 years after age 18. With less than 20 years, you can still receive OAS while abroad if you live in a country that has a social security agreement with Canada.
Since July 2022, seniors aged 75 and over automatically receive 10% more OAS — a permanent increase built into their monthly payment. You do not need to apply for this top-up.
OAS is nothing like CPP
The two are constantly confused. CPP is something you earned through contributions from employment. OAS is a residency-based benefit — you never contributed to it, and eligibility depends entirely on how long you have lived in Canada after age 18.
A full pension requires 40 years of Canadian residence after 18. With less, you receive a proportional amount — 25 years gives you 25/40ths, or 62.5% of the full pension. The minimum to qualify at all is 10 years of residence. This is why many newcomers to Canada receive a partial OAS no matter how long they worked, and why the calculator asks about residence rather than earnings.
The clawback, and how to plan around it
The OAS recovery tax — the "clawback" — takes back 15 cents of every dollar of net income above the annual threshold. Above a higher ceiling, OAS is eliminated entirely. It is based on net income, which is what makes it manageable: anything that reduces net income reduces the clawback.
The levers worth knowing: pension income splitting with a spouse can move income from the higher earner to the lower one, sometimes eliminating the clawback for a couple. Drawing down RRSPs before 65 lowers later mandatory RRIF withdrawals, which are the most common cause of crossing the threshold. And TFSA withdrawals do not count as income at all — which is precisely why a TFSA is so valuable in retirement, and why filling one during working years pays off twice.
Deferring, and the payments quoted quarterly
You may defer OAS past 65 for up to five years, gaining 0.6% per month — a permanent 36% increase at 70. Deferring is most attractive if you are still working at 65 and would have OAS clawed back anyway: you avoid losing it to the recovery tax and receive a larger, permanently indexed pension later.
OAS amounts change four times a year — January, April, July and October — indexed to the Consumer Price Index. CPP, by contrast, is adjusted annually. Any OAS figure you see quoted is therefore valid for one quarter only, which is why an amount from a six-month-old article will be wrong. Note also that the 75+ rate is permanently 10% higher than the 65–74 rate.
GIS and the other benefits attached to OAS
The Guaranteed Income Supplement is a non-taxable monthly top-up for OAS recipients with low income. It is income-tested annually from your tax return, so you must file every year even with no income or payments stop. Its clawback is far steeper than the OAS recovery tax — GIS is reduced by roughly 50 cents per dollar of other income — which is why an RRSP can actually be the wrong account for a low-income Canadian, since withdrawals reduce GIS.
There is also the Allowance for a 60–64 year-old spouse of a GIS recipient, and the Allowance for the Survivor. Most people are now enrolled in OAS automatically and receive a letter the month after turning 64 — but if no letter arrives, you must apply. Apply about six months before you want payments to start, and see our CPP timing guide, since the two decisions interact.