GIS Explained: The Guaranteed Income Supplement

The Guaranteed Income Supplement, or GIS, is a monthly benefit for low-income Canadian seniors who already receive Old Age Security. It is non-taxable and strictly income-tested: the more income you have from other sources, the less GIS you receive, and above a threshold it disappears entirely. Its purpose is to give the country’s lowest-income retirees a basic income floor.

This guide explains who qualifies, how the income test works, and how GIS interacts with OAS, CPP, and your own savings. While GIS is aimed at modest-income seniors, the planning lessons around it matter to a wider audience, including families helping aging parents. Treat this as general education and confirm specifics with Service Canada.

What GIS is

GIS sits on top of Old Age Security. You cannot receive GIS without first qualifying for OAS, so the two are linked. Where OAS is a near-universal benefit for seniors who meet the residency rules, GIS is targeted: it exists only to supplement the incomes of retirees who have little beyond OAS to live on.

Two features define it. First, GIS is non-taxable, so the amount you receive is money in hand. Second, it is income-tested on an ongoing basis, meaning it is recalculated each year against your income. That makes GIS unusually responsive to the rest of your financial picture, and it is why the benefit rewards careful planning.

Who qualifies

To receive GIS, you generally must:

• Be a resident of Canada.
• Already receive the Old Age Security pension.
• Have income below an annual threshold that depends on your marital status and whether your spouse also receives OAS.

Because eligibility depends on income, the threshold and your entitlement are reviewed every year. For most people the renewal is automatic, provided you file your income tax return on time, since the government recalculates your GIS from your reported income. Missing a tax filing can interrupt that renewal, so filing promptly matters even for seniors who owe no tax.

How the income test works

GIS is based on your income other than OAS itself. As that income rises, your GIS is reduced, and once your income passes the applicable threshold the benefit stops. The reduction is steep enough that GIS is genuinely a benefit for lower-income retirees, not a top-up that continues into middle incomes.

Crucially, not all income counts the same way. Some sources are included in the test and some are not. Understanding the difference is the heart of GIS planning.

Income source	Counts toward GIS income test
CPP benefits	Yes
RRSP and RRIF withdrawals	Yes
Employment and self-employment income (with a modest exemption)	Partly
Interest, dividends, and taxable capital gains	Yes
OAS pension	No
TFSA withdrawals	No

The figures and exemptions change over time, so confirm the current rules. The pattern, however, is durable: registered withdrawals count, and TFSA withdrawals do not.

Why the TFSA matters so much for GIS

For a modest-income retiree who may qualify for GIS, the choice of where savings are held becomes very important. Because RRSP and RRIF withdrawals count as income, drawing on those accounts can reduce or eliminate GIS. Because TFSA withdrawals do not count, money drawn from a TFSA leaves GIS untouched.

This can reverse the usual advice. For higher-income Canadians, the RRSP is often the workhorse account; for a lower-income senior who might receive GIS, every dollar pulled from an RRSP can effectively be taxed twice, once through regular tax and again through lost GIS. Building TFSA savings during the working years, and understanding how TFSA contribution room accumulates, can preserve thousands of dollars of benefit later. Our comparison of registered versus non-registered accounts explores the broader point that where you hold money is often as important as how much you hold.

How GIS fits with OAS and CPP

GIS, OAS, and CPP form an interlocking system. OAS is the foundation and a prerequisite for GIS. CPP is a separate, contributory pension that counts as income in the GIS test, so a larger CPP can reduce GIS. This is one reason the decision of when to start CPP is not purely about CPP: starting earlier at a lower amount, or later at a higher amount, can change GIS entitlement for a low-income senior.

Because the pieces connect, it helps to read this alongside OAS explained and CPP explained. For a modest-income household, the goal is often to arrange income so that GIS is preserved where possible, which can mean favouring TFSA withdrawals, timing CPP thoughtfully, and keeping taxable income low.

The Allowance and Allowance for the Survivor

GIS has two related benefits that extend help to people who are close to, but not yet at, the OAS age of 65. The Allowance is available to low-income individuals aged 60 to 64 whose spouse or common-law partner receives OAS and GIS. The Allowance for the Survivor is available to low-income people aged 60 to 64 whose spouse or partner has died.

Both are income-tested in the same spirit as GIS and are meant to bridge the gap until the person turns 65 and can claim OAS in their own right. They are frequently missed, partly because they apply to a narrow age band and partly because people simply do not know they exist. For a lower-income household where one partner is somewhat older than the other, or where a spouse has passed away before 65, these benefits can provide meaningful support during years that would otherwise be financially difficult. As with GIS itself, eligibility is recalculated from reported income, so filing a tax return on time matters.

Planning for a modest-income retirement

The lesson running through GIS and its companion benefits is that, for a modest-income household, how income is arranged can matter as much as how much there is. A retiree with a paid-off home, little pension income, and savings held in a TFSA rather than an RRSP can keep reported income low enough to receive meaningful non-taxable support. The same retiree who holds everything in an RRSP, and must draw taxable withdrawals, may receive far less. This is why decisions made years earlier, about which accounts to fund, quietly shape the benefits available in retirement.

Common misunderstandings

A few points cause confusion. GIS is not a reward for having contributed, the way CPP is; it is based purely on current income and residency. It is not taxable, unlike OAS and CPP. It is not permanent at a fixed amount; it moves with your income each year. And it is not something you should assume you cannot qualify for, since a retiree with a paid-off home, little pension income, and savings held in a TFSA can have a low enough reported income to receive it.

For families, this last point matters when helping aging parents. A parent with modest reported income may be entitled to GIS they are not claiming, simply because no one looked. Reviewing an aging parent’s tax return and income sources is a small act that can uncover a non-taxable benefit worth having, and it costs nothing but attention.

It is also worth remembering that GIS responds to income in the year it is reported, so a one-time spike can reduce or eliminate it temporarily. A large RRSP or RRIF withdrawal, a capital gain realised all at once, or the sale of a non-registered investment can all push reported income up for a single year and cut GIS, even if the retiree’s ongoing income is low. For a GIS recipient, spreading such events out, or drawing instead on a TFSA where possible, can protect the benefit. This is one more reason the kind of income, and the timing of when it is realised, deserves as much thought as the amount.

Next step

GIS rewards planning that most people never think to do, because the benefit depends so heavily on the kind of income you draw and from which accounts. Small changes in how a modest-income retirement is structured can protect meaningful amounts of non-taxable income.

Our retirement planning and tax planning work includes coordinating OAS, CPP, GIS, and your withdrawals so that benefits are preserved where they should be. If you or an aging parent in Ottawa or Ontario may be affected, book a private consultation and we will review the full picture.