- Online calculators are usually built on the Spousal Support Advisory Guidelines, which are not law but are often used by judges.
- A calculator result is a range that assumes you are entitled to support, and an income gap alone does not create that entitlement.
- Courts and agreements can land outside the range for recognized reasons, so treat the result as a starting point.
You have typed two incomes into an online calculator and a number, or a range of numbers, has appeared. It is natural to treat that as the answer, but it is better understood as a starting point for a conversation.
This article explains what usually sits behind the result, how to read a range, and why a judge or a negotiated agreement may end up somewhere else.
What an online calculator is actually doing
Most calculators are built on the Spousal Support Advisory Guidelines (SSAG). The SSAG are not law, but judges often base their spousal support decisions on them. They were designed for the federal Divorce Act, and courts and lawyers also often use them under provincial legislation such as Ontario's Family Law Act.
Ontario's spousal support page notes that the online SSAG calculator it links to considers only employment income and simple calculations. The SSAG start from the definition of income in the Federal Child Support Guidelines, and section 19 of those Guidelines is often the basis for imputing income. If you have other income, debts or a complicated work history, a basic tool may not capture your situation.
How to read the range
Which formula applies depends on whether child support is also being paid. The two formulas measure amount and duration differently.
| Situation | Amount | Duration |
|---|---|---|
| No child support | 1.5% to 2% of the difference in gross incomes for each year of cohabitation, capped at 50%, and the top of the range cannot exceed the amount that would equalize net incomes | 0.5 to 1 year for each year of cohabitation, and indefinite if the marriage lasted 20 years or more or under the rule of 65 |
| With child support | An amount that leaves the lower-income recipient with 40% to 46% of the couple's combined Individual Net Disposable Income, which is income after child support, taxes and deductions | Initial orders are indefinite but have outer limits that apply on review or variation |
Under the rule of 65, the marriage must have lasted at least five years and the years of marriage plus the recipient's age at separation must total 65 or more. The rule of 65 does not apply to marriages under 5 years, and short marriages produce very limited awards, if there is entitlement at all.
"Indefinite" does not necessarily mean permanent. It only means no time limit can be set when the order or agreement is made, and the support stays subject to variation and review.
A result is not the same as entitlement
A calculator assumes you are entitled to support. An income gap on its own does not create entitlement, which must be proven or agreed before the formulas apply.
Entitlement can be compensatory (loss or disadvantage from roles in the relationship), non-compensatory (need), or contractual, and a contractual basis can come from a formal domestic contract or from an implied or informal agreement.
A result of zero is also easy to misread. A zero range is common under the with-child-support formula because child support comes first, and it is not the same as no entitlement. It may simply reflect a current inability to pay.
Why a court may differ from the calculator
The formulas are not applied mechanically. Some of the common reasons for a different outcome are listed below.
- Very high or low incomes: above a payor income of $350,000 discretion is used, and incomes below $20,000/$30,000 require adjustments.
- Recognized exceptions: these include compelling financial circumstances at the interim stage, debt payments, prior support obligations, illness and disability, property division, basic needs or hardship, non-taxable payor income, and a child's special needs.
- Imputed income: for a spouse who is not working but should be, a court can readily impute minimum-wage income, but anything higher requires evidence.
- Short marriages without children: a compensatory claim is assessed individually and can fall outside the formula range.
- Immigration sponsorship: when a short marriage breaks down while a sponsorship agreement is in place, the agreement may be an independent factor that leads outside the ranges.
- Earlier payments: any period of interim support, and informal voluntary support, counts toward the duration limits.
The SSAG apply to interim orders as well, and where income evidence is thin, ranges can be estimated using alternative income figures. Compelling financial circumstances right after separation can justify interim support above or below the range.
What to do next
Use the calculator to get oriented, not to set a bottom line. Before you negotiate or file anything, it helps to prepare.
- Gather recent tax returns, notices of assessment and pay information for both spouses.
- Write down the dates you began living together, married and separated.
- List any children, child support arrangements and special needs.
- Note any debts, pensions, property division or earlier support arrangements.
- Run the calculator with a few different income scenarios and keep the results.
- Speak with a family lawyer about whether you are entitled to support and how the guidelines would apply to your facts, and with an accountant about tax.
Frequently asked questions
Is the calculator result what a judge will order?
Not necessarily. The SSAG are not law, but judges often base their decisions on them. A court can still go outside the range for recognized reasons, so the result is best treated as a starting point.
Does a big income gap mean I will get support?
No. An income gap on its own does not create entitlement, which must be proven or agreed before the SSAG formulas apply. Entitlement can rest on compensatory, non-compensatory or contractual grounds.
Why does my calculator show zero?
A zero range is common when child support is being paid, because child support comes first. It is not the same as no entitlement and may only reflect a current inability to pay.
Does the calculator include all my income?
Not always. Ontario's guidance notes that the online calculator it links to considers only employment income and simple calculations. More complex incomes should be reviewed with a lawyer or accountant.
Sources
- Department of Justice Canada – Spousal Support Advisory Guidelines — justice.gc.ca
- SSAG Revised User's Guide – Entitlement — justice.gc.ca
- Department of Justice – Steps to Using the Guidelines, without Child Support Formula — justice.gc.ca
- SSAG Revised User's Guide – Without Child Support Formula — justice.gc.ca
- SSAG Revised User's Guide – Exceptions (SSAG 12.5) — justice.gc.ca
- Department of Justice – Steps to Using the Guidelines, with Child Support Formula — justice.gc.ca
- SSAG Revised User's Guide – Table of Contents (Chapter 12 Exceptions) — justice.gc.ca
- Ontario.ca – Spousal support — ontario.ca
Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.
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