Guaranteed Income Supplement (GIS): complete guide 2026

What is the GIS?

The Guaranteed Income Supplement (GIS) is a monthly benefit paid by the federal government to OAS pensioners whose annual income falls below an established threshold. It serves as a safety net designed to guarantee a minimum income for the most vulnerable seniors.

Unlike OAS, the GIS is not taxable. It does not appear as taxable income on the tax return. However, it is included in the calculation of net income for certain provincial benefits.

Amounts and Thresholds 2026

The maximum GIS amount for a single person is $1,065.47 per month (approximately $12,786 per year). This amount is indexed quarterly based on the Consumer Price Index (CPI).

The annual income threshold for a single person is $21,624. Beyond this threshold, the GIS is completely eliminated. The income considered excludes OAS itself but includes QPP/CPP, RRIF withdrawals, employment income, private pensions, and interest.

Approximate amounts for a single person. Exact amounts vary based on quarterly indexation.

Eligibility Criteria

To receive the GIS, the client must meet three conditions: be aged 65 or older, be receiving OAS, and have an annual income below the established threshold. Income is assessed on an individual basis for single persons and on a family basis for couples.

The GIS application is made to Service Canada. In some cases, the GIS is granted automatically when applying for OAS if tax information is available. Otherwise, form ISP-3025 is required.

It is absolutely essential to file a tax return every year, even if income is zero. Without a filed return, GIS payments are automatically suspended in July.

Reduction Rate (Clawback)

The GIS is reduced by 50 cents per dollar of income (excluding OAS) for single individuals. For couples where both spouses receive OAS, the reduction rate is 25 cents per dollar.

This 50% recovery rate creates an extremely high effective marginal rate. A dollar of RRIF withdrawal costs the client 50% in GIS reduction, plus the federal and provincial marginal tax rate. The total effective rate can exceed 80% in some situations.

Since 2021, the first $5,000 of employment income is fully exempted from the GIS calculation, and the next $10,000 is exempted at 50%. This exemption applies only to employment and self-employment income, not to pension or investment income.

Impact on Other Benefits

The GIS interacts with several other benefits. GIS recipients may be eligible for additional provincial benefits, including the housing allowance in Quebec, the solidarity tax credit, and property tax refunds.

GIS recipients are also entitled to the federal Allowance for the Survivor and, in certain situations, the Allowance for the spouse (aged 60 to 64). Losing the GIS can trigger a domino effect across all of these benefits.

How to Apply

The GIS application is made to Service Canada, either at the same time as the OAS application or separately afterward. Form ISP-3025 (GIS Application) is available online or in paper format.

If the client's income decreases during the year (retirement, job loss, death of spouse), form ISP-3041 allows requesting that the GIS be calculated based on the estimated current-year income rather than the previous year's income.

GIS renewal is automatic when the tax return is filed on time. If the client does not file their return before April 30, GIS payments will be suspended in July until the return is processed.

Advisor Strategies

GIS planning rests on one fundamental principle: minimize the client's net income to maximize the benefit. Here are the key strategies:

Prioritize TFSA over RRSP: TFSA withdrawals are not included in net income. For a low-income client, every dollar placed in an RRSP rather than a TFSA will potentially cost 50 cents of GIS on top of the tax upon withdrawal. The TFSA should be maximized first for this client segment.

Deplete the RRSP before age 65: if the client has RRSP savings, it may be advantageous to withdraw from the RRSP between ages 60 and 64 (or even earlier) to pay tax at a lower marginal rate, then receive the full GIS at age 65 with income coming solely from the TFSA.

Do not defer OAS: GIS is tied to receiving OAS. Deferring OAS to age 70 for the 36% enhancement makes no sense if the client is GIS-eligible, as they would lose 5 years of GIS (potentially over $63,000 over 5 years).

Plan capital gains: capital gains are included at 50% in net income (inclusion rate). Avoid realizing significant gains in years when GIS is at stake. Deferring asset sales or spreading gains across multiple years can preserve GIS entitlement.

Common Mistakes

Not filing a tax return: this is the most frequent mistake. Without a filed return, GIS is automatically suspended. Some seniors lose thousands of dollars because they believe they do not need to file when their income is zero.

Contributing to an RRSP for a potentially GIS-eligible client: the RRSP deduction provides limited tax benefit at low income, but the subsequent withdrawal will trigger a 50% GIS clawback. The total cost often exceeds the initial benefit.

Ignoring mandatory RRIF withdrawals: at age 72, the RRSP must be converted to a RRIF with mandatory minimum withdrawals. These withdrawals are added to net income and reduce the GIS. This is why planning to deplete the RRSP before age 65 is critical for low-income clients.

Forgetting form ISP-3041: when a client retires mid-year, their previous year's income (including salary) may disqualify them from GIS. Form ISP-3041 allows recalculating GIS based on estimated income, which is often much lower.

Frequently Asked Questions