The Spousal Support Advisory Guidelines (SSAG) provide Ontario courts with mathematical formulas to calculate a fair range of spousal support. There are two distinct formulas: the “Without Child Support Formula” based heavily on the length of the marriage, and the “With Child Support Formula” which prioritizes the financial needs of the children first.
Determining who pays spousal support, how much they pay, and for how long is often the most contentious part of any separation. Before 2008, support awards across Canada were highly unpredictable. To solve this, the federal government introduced the Spousal Support Advisory Guidelines (SSAG). While they are not technically mandatory laws, judges at the Ontario Superior Court of Justice rely on them so heavily that they operate as the definitive standard.
Whether you are negotiating a separation agreement in Ottawa, attending a mediation in London, or litigating in Toronto, your lawyer will use the SSAG to estimate your financial obligations or entitlements. 📊 The guidelines use complex mathematical formulas based on gross incomes and the duration of the relationship. This guide explains how the SSAG works in practical terms for Ontario families.
The Two Different SSAG Formulas
The SSAG is divided into two entirely separate calculation methods. The formula you use depends entirely on whether or not there are dependent children involved in the separation who require child support.
| Feature | Without Child Support Formula | With Child Support Formula |
|---|---|---|
| Who uses it? | Couples with no children, or adult children who are no longer dependent. | Couples who have dependent children requiring child support. |
| Primary Factor | The length of the marriage/cohabitation heavily dictates the amount and duration. | Prioritizes child support first; spousal support is calculated on the remaining disposable income. |
| Duration Rule | Usually 0.5 to 1 year of support for every year of marriage (indefinite if married 20+ years). | Duration is often tied to the age of the youngest child finishing high school. |
Step-by-Step Process for Calculating SSAG in Ontario
Because the formulas are incredibly complex, virtually no one calculates the SSAG by hand. Lawyers and judges use specialized software, most notably DivorceMate, to generate the figures. However, understanding the steps behind the software is vital.
Step 1: Establish Entitlement First
The SSAG formulas only apply if a spouse is legally “entitled” to support. 📄 You cannot simply plug numbers into a calculator and demand money. Entitlement in Ontario is generally based on three grounds: Compensatory (one spouse sacrificed their career to raise children), Non-compensatory (one spouse faces severe financial hardship after the split), or Contractual (a prenuptial agreement dictates support). You must prove one of these first.
Step 2: Determine Gross Incomes (CRA Standards)
The calculations require the precise gross annual income for both parties. You will look at your most recent Canada Revenue Agency (CRA) Notice of Assessment, specifically Line 15000 (Total Income). If a spouse is self-employed, hides income, or is intentionally unemployed, a lawyer may need to “impute” a higher income before running the SSAG.
Step 3: Run the Calculation and Review the Ranges
Once the software processes the incomes, ages, and relationship length, it generates a report with a Low, Mid, and High range for both the monthly amount and the duration. 📈 The “Mid” range is generally the default starting point in Ontario courts. If you want the High range, you must demonstrate specific needs or an exceptionally high standard of living during the marriage.
How Much Does it Cost to Calculate?
Obtaining an accurate SSAG calculation is a standard part of retaining a family lawyer. You should anticipate the following costs in CAD as of May 2026:
- Software Calculation Only: Many law firms charge a flat fee of $300 to $500 just to run the DivorceMate calculations based on the numbers you provide.
- Negotiating an Agreement: Drafting a legally binding separation agreement that finalizes the SSAG support ranges typically costs between $2,000 and $5,000+.
- Litigating Support: If you cannot agree on the base incomes and must go to court, trial costs regarding spousal support frequently exceed $15,000.
How Long Does the Process Take?
The speed of resolving spousal support depends on transparency. ⏱ If both spouses eagerly share their CRA tax returns and agree on their incomes, a lawyer can generate the SSAG ranges in a matter of minutes, and an agreement can be drafted in 1 to 2 months. If one party refuses financial disclosure, the process can drag on for over a year through mandatory court motions for disclosure.
Frequently Asked Questions (FAQ)
Is the SSAG amount legally mandatory in Ontario?
No, the guidelines are “advisory,” meaning they are highly recommended but not strictly legislated. However, if a judge decides to award an amount outside of the SSAG ranges, they must provide strong written legal reasons for doing so.
What if the paying spouse makes over $350,000 a year?
The SSAG has an “income ceiling” of $350,000. If the payor earns more than this, the strict formula no longer automatically applies, and the court has total discretion to cap the support or calculate it differently based on the family’s lavish lifestyle.
Can we agree to a lump-sum payment instead of monthly support?
Yes. Many couples prefer a clean break. Lawyers use the SSAG figures to calculate the total lifetime value of the support, and then apply a “discount rate” to account for inflation and tax implications to determine a fair one-time lump-sum payment.
Does spousal support change if I start a new relationship?
It can. If the spouse receiving support moves in with a new partner or remarries, the paying spouse can apply to the court to have the support reduced or terminated, arguing that the recipient’s financial need has decreased.
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