GIS: the other retirement clawback — and the one more people actually face
The OAS clawback gets the headlines, but the Guaranteed Income Supplement's 50-cent clawback hits far more retirees. The current maximums, the income test, and why TFSA-first saving protects it.
Everyone's heard of the OAS clawback — the recovery tax that starts nibbling at Old Age Security once income passes $95,323 (for 2026). Far fewer people can explain the Guaranteed Income Supplement (GIS), even though its clawback starts at the first dollar of income and touches many more households.
The GIS is a tax-free monthly top-up paid alongside OAS to lower-income seniors. For the July–September 2026 quarter, the maximums are:
- $1,123.17/month if you're single, divorced or widowed — income under $22,800
- $676.09/month each for a couple where both receive full OAS — combined income under $30,096
- $1,123.17/month if your spouse doesn't receive OAS or the Allowance — combined income under $54,624
That single maximum works out to roughly $13,500 a year, untaxed. Like OAS, the amounts are re-indexed every January, April, July and October.
How the income test works
Your GIS is set by your previous year's net income — excluding OAS and the GIS itself. Broadly, every extra dollar of income cuts the benefit by about 50 cents (more in some ranges once top-ups phase out). CPP, RRSP and RRIF withdrawals, and investment income all count in full.
Work is the one carve-out: the first $5,000 of employment or self-employment earnings is fully exempt, and half of the next $10,000 is too. A senior earning $15,000 at a part-time job only has $5,000 of it counted.
A 50-cent clawback is a ~50% effective tax rate — higher than what most top earners pay. That's why which account a modest retirement dollar comes from matters so much.
The TFSA-first consequence
The clawback treats withdrawals very differently:
- RRSP/RRIF withdrawals count as income → each $1,000 can cost ~$500 of GIS, plus any income tax.
- TFSA withdrawals don't count at all → zero effect on GIS.
For someone heading toward a modest retirement income, this flips the usual advice: the RRSP deduction saves tax at a low rate today, then the withdrawal gets clawed back at ~50% later. It's the same logic as our TFSA-or-RRSP framework, pushed to its extreme.
Three ways people lose GIS money
- Not filing a tax return. GIS renews automatically each July from your return. No return, no renewal.
- Assuming they don't qualify. The couple threshold of $54,624 (when one spouse isn't on OAS yet) surprises people who think GIS is only for the very poorest.
- Careless RRIF withdrawals. A lump-sum withdrawal in one year can wipe out the following July-to-June benefit year entirely.
Run your own numbers
The interactions are exactly what a calculator is for: the GIS calculator estimates your entitlement from your income mix, and the retirement income view shows how CPP, OAS, GIS and withdrawals stack after tax.
The takeaway
The OAS clawback is a high-income problem; the GIS clawback is a middle-and-modest-income one — and it's steeper. If retirement income anywhere near the thresholds is plausible for you, file every year, favour the TFSA for the last dollars of saving, and plan RRIF withdrawals with the 50-cent meter in mind.