How We Calculate Your Guaranteed Income Supplement (GIS)
Complete guide to GIS payment amounts, income thresholds, and quarterly increases
If you are a low-income senior in Canada, the Guaranteed Income Supplement (GIS) can make the difference between struggling to pay for groceries and living with basic dignity. But one of the most common questions we hear is: "How is my GIS payment actually calculated?"
Unlike Old Age Security (OAS), which gives the same base amount to almost every senior aged 65 or older, the GIS is income-tested. That means the amount you receive depends entirely on your financial situation. Use a GIS Payment Calculator to get an estimate, but understanding the formula behind the numbers will help you plan better and avoid surprises.
Below, we break down every factor that determines your GIS payment, including marital status, previous year's income, combined spousal income, and the four different payment categories.
The Core Formula: How GIS Is Estimated
The basic rule is simple: The higher your annual income, the lower your GIS payment. For every dollar of income you earn above a certain exempt amount, your GIS is reduced by 50 cents to 75 cents, depending on your marital status.
Your GIS payment is calculated using your income from the previous year (as reported on your tax return). For example, your July 2025 to June 2026 GIS payments are based on your 2024 income tax return.
The government starts with a maximum monthly payment for your situation. Then, they subtract a portion of your annual income. What remains is what you receive.
Factor 1: Your Marital Status (Most Important)
Your marital status determines which income threshold and which maximum payment apply to you. The GIS recognizes four distinct situations:
1. Single, divorced, or widowed
If you are not currently living with a spouse or common-law partner, you fall into this category.
- Your annual income must be: Less than $22,512
- Maximum monthly payment: up to $1,109.85
2. Spouse/common-law partner receives full OAS pension
Both you and your spouse are 65 or older, and both receive OAS. Your GIS is based on combined annual income.
- Combined annual income must be: Less than $29,760
- Maximum monthly payment: up to $668.08
3. Spouse/common-law partner receives the Allowance
You are 65+ receiving GIS, while your younger spouse (60-64) receives the Allowance.
- Combined annual income must be: Less than $41,664
- Maximum monthly payment: up to $668.08
4. Spouse does NOT receive OAS or the Allowance
Your spouse is under 65 and not eligible for the Allowance. Their income still affects your GIS.
- Combined annual income must be: Less than $53,952
- Maximum monthly payment: up to $1,109.85
Factor 2: Your Income from the Previous Year
The government uses your Net Income from line 23600 of your tax return. This includes:
- Employment earnings
- CPP/QPP retirement pensions
- Private pensions (RRIFs, annuities, workplace pensions)
- Investment income (interest, dividends, rental income)
- Foreign pensions and Employment Insurance (EI) benefits
- Workers' compensation benefits
Important exclusions (income that does NOT reduce your GIS):
- Old Age Security (OAS) payments
- GIS payments themselves
- Child tax benefits and GST/HST credits
- Most disability benefits (under certain conditions)
Factor 3: Combined Income for Couples
If you have a spouse or common-law partner, your GIS is not based on your individual income alone. Instead, the government looks at your combined annual income.
Example: You earn $5,000/year. Your spouse earns $25,000/year. Combined = $30,000. If you are in the standard married category (both receiving OAS), threshold is $29,760 → you are over by $240 → your GIS will be reduced or zero.
Always use a GIS Payment Calculator that asks for spousal income to get an accurate estimate.
The Reduction Rate: How Much You Lose
Once you know your maximum monthly payment and your income, the government applies a clawback (reduction).
- Single, widowed, or divorced: GIS reduced by 50 cents for every dollar of annual income above $0 exempt amount.
- Married recipients (all categories): GIS reduced by 50 cents for every dollar of combined annual income above the exempt amount.
Earning an extra $1,000 per year will reduce your GIS by approximately $500 per year (about $41 per month).
Maximum Payment Table (2025 Rates)
| Your situation |
Your annual income must be |
Maximum monthly payment |
|---|
| Single, divorced, or widowed | Less than $22,512 | up to $1,109.85 |
| Spouse receives full OAS pension | Less than $29,760 (combined) | up to $668.08 |
| Spouse receives the Allowance | Less than $41,664 (combined) | up to $668.08 |
| Spouse does NOT receive OAS or Allowance | Less than $53,952 (combined) | up to $1,109.85 |
The maximum amounts are not guaranteed. Your actual payment amount may be different depending on your income.
Cost of Living Increases (Quarterly Indexing)
The GIS is not a static amount. Every year, on January 1, April 1, July 1, and October 1, pension amounts are increased to reflect any increases in the cost of living (inflation). These increases are based on the Consumer Price Index (CPI).
Important: Pension amounts do not decrease if the cost of living goes down. They simply remain the same until inflation rises again.
Example Calculations Using a GIS Payment Calculator
Example 1 – Single senior:
- Age: 68, widowed
- Previous year's income: $12,000
- Maximum GIS: $1,109.85/month
- Reduction: $12,000 × 50% = $6,000 per year ($500 per month)
- Monthly GIS = $1,109.85 – $500 = $609.85
Example 2 – Married senior (both receive OAS):
- Combined income: $20,000
- Maximum GIS: $668.08/month
- Reduction: $20,000 × 50% = $10,000 per year ($833.33 per month)
- GIS = $0 (reduction exceeds maximum)
Example 3 – Married senior (spouse does not receive OAS):
- Combined income: $30,000
- Maximum GIS: $1,109.85/month
- Reduction: $30,000 × 50% = $15,000 per year ($1,250 per month)
- GIS = $0 (reduction exceeds maximum)
How to Maximize Your GIS Payment
- Use tax planning: RRSP withdrawals count as income. Withdraw strategically to stay under thresholds.
- Split pension income with your spouse if it reduces combined income on paper.
- Delay CPP if possible, because CPP counts as income and reduces GIS.
- Report all income accurately – errors can lead to overpayments you must repay.
