GIS (Guaranteed Income Supplement) is a monthly, non-taxable benefit paid on top of OAS to seniors 65+ with low income. Unlike CPP, it isn't based on contributions, and unlike OAS, it isn't based on years of residency - it's based entirely on your reported income. You can only receive GIS if you're already receiving OAS.

Is GIS based on pre-tax or after-tax income?

GIS uses your net income as reported on your tax return (line 23600) for the previous calendar year - not gross income, and not after-tax take-home pay. OAS and GIS payments themselves are excluded from this calculation.

How does the GIS clawback work?

GIS is reduced continuously starting from your first dollar of income (beyond OAS) - not just after you cross the income threshold. The reduction is roughly $1 for every $2 of income reported, until GIS reaches zero at the income threshold. This is an approximation; Service Canada calculates the exact amount using defined income brackets rather than one smooth line.

Do TFSA withdrawals count toward GIS income?

No. TFSA withdrawals are not considered income for tax purposes and do not count toward the GIS income test. RRSP and RRIF withdrawals, by contrast, do count in full and can significantly reduce GIS entitlement.

Does employment income affect GIS differently than other income?

Yes. The first $5,000 of employment or self-employment income is fully exempt from the GIS calculation, and the next $10,000 is exempt at 50%. This exemption does not apply to RRSP/RRIF withdrawals, CPP, or investment income, which count in full from the first dollar.

Who administers GIS - Service Canada or the CRA?

Service Canada administers GIS, calculates payments, and handles applications and renewals. The CRA processes tax returns and supplies the net income figure Service Canada uses to calculate GIS entitlement each benefit year.

What is the Allowance?

The Allowance is a related benefit for people aged 60 to 64 whose spouse or common-law partner already receives OAS and GIS, bridging the income gap until the younger spouse turns 65. The Allowance for the Survivor serves the same purpose for someone 60-64 whose spouse has died and who hasn't remarried. Both are non-taxable, income-tested, and require a separate application.

Is the OAS clawback the same as the GIS clawback?

No. The OAS clawback (Recovery Tax) applies only to OAS and kicks in at a much higher income level. The GIS clawback is a separate, steeper reduction that starts from the first dollar of extra income. They're calculated independently and require different planning responses.

27 Jul 2026 8 min read Personal Finance Basics

What Is GIS (Guaranteed Income Supplement)?

Q: Who qualifies for GIS?

You must be 65 or older, already receiving OAS, and have annual net income (excluding OAS itself) below the applicable threshold for your marital status. Thresholds and maximum monthly amounts are updated quarterly and vary depending on whether you're single, or have a spouse who does or doesn't also receive OAS or the Allowance.

If you've read the CPP post or the OAS post, you know the pattern by now - I like knowing exactly what I'm entitled to and exactly how it works, before I need it. GIS is the third piece of that puzzle, and it's the one people either haven't heard of at all, or badly misunderstand. I know I didn’t know much about it until I started strategizing for early retirement.

GIS doesn't get much attention. It's not on your paystub and I rarely hear coworkers talking about it. But for a lot of retirees, especially anyone retiring early with a modest RRSP, it can be a bigger planning lever than CPP and OAS combined. So, let's take a look at this program and what it is.

What Is GIS?

GIS stands for Guaranteed Income Supplement. It's a monthly, non-taxable benefit paid on top of OAS to seniors with low income. Unlike CPP, it has nothing to do with what you contributed. Unlike OAS, it's not based on how long you lived in Canada either - it's based entirely on how much income you report.

You can only receive GIS if you're already receiving OAS. It's not a standalone program. Think of it as a top-up. OAS is the floor, GIS raises that floor further for anyone who needs it.

And because it's non-taxable, every dollar of GIS you receive is a dollar you actually keep. That's different from CPP and OAS, which are both fully taxable.

Who Qualifies for GIS?

To qualify, you need to:

Be 65 or older
Be receiving the OAS pension
Have an annual net income (excluding OAS itself) below the applicable threshold for your situation (net income is line 23600 of your previous year’s tax return).

The thresholds depend on marital status. As of mid-2026 (time of writing this post):

Single, divorced, or widowed - income under $22,800 - maximum monthly payment up to $1,123.17
Spouse/common-law partner receives full OAS - combined income under $30,096 - maximum monthly payment up to $676.09 per person
Spouse receives the Allowance - combined income under $42,144 - maximum monthly payment up to $676.09
Spouse doesn't receive OAS or the Allowance - combined income under $54,624 - maximum monthly payment up to $1,123.17

(By the way, these figures get updated every January, April, July, and October to reflect the cost of living, so check the current GIS payment amounts before you plan around them.)

You need to apply and file taxes every year to keep it going. Miss a return, and Service Canada has nothing to calculate your GIS from - so it stops. Also - more on the Allowance below.

How the Clawback Actually Works

Here's the part that trips people up, including me. It took me so many reads and calculations to even remotely understand this. The income threshold isn't a switch that flips GIS off once you cross it. It's the endpoint of a slope that starts at your very first dollar of income.

GIS phases out continuously, from $0 upward, at a very quick rate - for every $2 of income you report (beyond OAS itself), your GIS drops by $1. By the time you reach the threshold - $22,800 for a single senior - that ongoing reduction has eaten away your entire GIS entitlement. You're not "under the threshold" in some passive sense the whole way up, you're partway down the ramp the entire time.

Picture it as a slide, not a cliff:

$0 income -> full $1,123.17/month GIS
$6,000/year in CPP (and nothing else) -> GIS reduced by roughly $3,000/year (~$250/month), leaving about $873/month
$22,800/year -> $0/month GIS

That 50%-per-$2 rule is a useful approximation, not an exact formula. Service Canada calculates GIS from defined income brackets rather than one smooth continuous line, so the real numbers have some rounding built in - the actual cutoff lands a bit lower than a simple "double the max GIS" calculation would suggest. Good enough for planning purposes, but confirm your specific number with Service Canada or an advisor before making decisions around it.

Stack that clawback on top of regular income tax, and the effective marginal rate on "extra" income in retirement can get uncomfortably close to 70-80%. This is why GIS-eligible retirees need to think carefully about where their income comes from, not just how much of it there is…does TFSA come to mind now? More on that below.

The Working Income Exemption

There's one meaningful break - employment and self-employment income gets special treatment.

The first $5,000 of employment/self-employment income is fully exempt - it doesn't touch your GIS at all!
The next $10,000 (from $5,001 to $15,000) is exempt at 50% - only half of it counts

So a GIS recipient can earn up to $15,000 from part-time work and only have $5,000 of it counted against their benefit. That's a deliberate policy choice to stop punishing seniors who want to keep working a bit. RRSP withdrawals, RRIF withdrawals, CPP, and investment income don't get this treatment - they count in full, right from dollar one.

The Part Most People Miss - TFSA vs. RRSP

This is where GIS stops being a "low-income senior" topic and becomes a real planning consideration for anyone approaching retirement with a modest portfolio.

RRSP and RRIF withdrawals count as income for GIS purposes. TFSA withdrawals do not!

That single fact can be worth thousands of dollars a year to the right retiree. If you're going to end up in GIS territory in retirement, pulling income from a TFSA instead of an RRIF preserves your GIS entirely, because the withdrawal is invisible to the income test. Pull the same dollar amount from a RRIF, and you could be losing 50 cents of GIS for every dollar you take out - on top of whatever tax you owe.

This is part of why I've talked before about not treating your RRSP and TFSA as interchangeable buckets. They behave completely differently once GIS enters the picture, and for anyone retiring on a smaller nest egg, that difference is the whole ballgame.

The RRSP Meltdown Angle

If your income is going to sit near GIS territory anyway, there's a case for deliberately drawing down RRSP room before age 65, before OAS and GIS start, rather than after. Withdraw RRSP funds at a low tax bracket in your early 60s (or even in early retirement, whenever your income is otherwise low), and you shrink the RRSP/RRIF balance that would otherwise generate income clawing back GIS later. I made a calculator for this in an earlier post.

It's a strategy that only makes sense for a specific kind of retiree - modest savings, low other income, a real shot at GIS eligibility. But for that retiree, sequencing withdrawals before age 65 can be worth more than almost any other single decision they make.

OAS Clawback VS GIS Clawback - Not the Same Thing

Quick clarification - the OAS clawback (the Recovery Tax) kicks in at a much higher income level and only affects OAS. The GIS clawback is a completely separate, much steeper reduction that starts from the first dollar of extra income. If you're worried about "the clawback" in retirement, ask which one you're actually talking about - the planning response is different for each.

What About the Allowance?

There's a related benefit worth knowing about if there's an age gap in your household - the Allowance. It's for people aged 60 to 64 whose spouse or common-law partner already receives OAS and GIS - essentially a bridge for the younger spouse until they turn 65 and qualify for OAS in their own right. There's also an Allowance for the Survivor, for someone 60-64 whose spouse has died and who hasn't remarried. Both are non-taxable, income-tested, adjusted quarterly like GIS, and require an application - they're not automatic. If you're eligible, they stop the month after you turn 65, at which point you'd transition to your own OAS and GIS.

The Short Version

GIS is a non-taxable, income-tested top-up to OAS for low-income seniors 65+.
You must already be receiving OAS to get it, and you must file taxes every year to keep it.
Maximum monthly amounts and income thresholds are updated quarterly - confirm current figures before planning around them.
GIS is reduced by roughly $1 for every $2 of other income - a steep 50% effective clawback.
Employment income gets a partial exemption (first $5,000 fully exempt, next $10,000 at 50%) - most other income doesn't.
TFSA withdrawals don't count as income for GIS but RRSP/RRIF withdrawals do. That distinction alone can be worth thousands of dollars a year.
For retirees with modest savings, GIS eligibility can, and should, shape when and how you draw down your RRSP.

GIS isn't glamorous. Nobody brags about qualifying for it. But if there's a real chance you'll be eligible in retirement, understanding how the clawback works, and structuring your withdrawals around it, is some of the highest-leverage planning you can do.