Spousal Support in Ontario (2026): What Actually Decides the Number

This article provides general information about spousal support in Ontario as of 2026 and is not legal advice. The formula figures are drawn from the federal Spousal Support Advisory Guidelines (July 2008) and its Revised User's Guide (April 2016), and the statutory references from the consolidated Family Law Act, R.S.O. 1990, c. F.3, the Divorce Act, R.S.C. 1985, c. 3 (2nd Supp.) and the Limitations Act, 2002, all read on 10 September 2026.

Spousal support Ontario courts order is set by a formula you can work out on the back of an envelope. Take the gap between two incomes, multiply it by a percentage, and get the percentage from the number of years the couple lived together. Four lines of arithmetic.

Which makes it odd that these cases run for months.

Child support is a lookup: find the payer's income in a published table, read off the amount. Spousal support only looks like that. Before the formula runs, someone has to decide whether support is owed at all, whose income figure goes in, and which date the relationship started on. Those answers are worth hundreds of dollars a month, and the formula never sees the argument that produced them.

So this guide is ordered by the inputs rather than the topics, roughly by what each one is worth. There is a calculator for the half of the formula that can be run honestly, and a plain answer about the half that cannot. If you would rather start with a person, you can get matched with a family lawyer at no cost.

Spousal support Ontario: the short version

Support is not automatic, the formula produces a range rather than a figure, and the number moves most when the facts behind it move.

• Entitlement is a separate question, decided first. A gap in income does not create a claim on its own. Support has to rest on a compensatory, contractual or non-compensatory basis, the three grounds the Supreme Court set out in Bracklow v. Bracklow.
• The formula shares a gap, not an income. Where no child support is being paid, the Spousal Support Advisory Guidelines give 1.5% to 2% of the difference between the two gross incomes for each year the couple lived together, capped at half the gap.
• Length runs from the day you moved in. Not from the wedding. Pre-marital cohabitation counts, and in a long relationship those extra years are worth real money.
• Two rules delete the end date. Twenty years together, or five years plus a recipient whose age and years together total 65, and the order sets no end date at all.
• The Guidelines are advisory. They are not law, no statute enacts them, and a judge can depart from them. The legal authority is section 15.2 of the Divorce Act and Part III of Ontario's Family Law Act.
• Ontario legislation says support, not alimony. Alimony is the older word, still standard in the United States and still common in Canadian searches. People use it to mean the same thing.

Entitlement is decided before any formula runs

No entitlement, no support, whatever the arithmetic says. This is the step most calculators skip, and the authors of the Guidelines say so in print.

Their Revised User's Guide puts it bluntly at the top of a chapter called Common Errors to Avoid: "the SSAG only deal with amount and duration, after there has been a finding or agreement on entitlement to spousal support. It is wrong to just run the numbers." A few pages later: "If there is a finding of no entitlement, the Guidelines are not applicable."

In Bracklow v. Bracklow, [1999] 1 S.C.R. 420, the Supreme Court of Canada held that "the law recognizes three conceptual grounds for entitlement to spousal support: (1) compensatory; (2) contractual; and (3) non-compensatory." Compensatory claims answer what the relationship cost the lower earner, the career paused for a move or for children. Contractual claims come from a promise in a separation agreement or a marriage contract. Non-compensatory claims rest on need and on the standard of living the relationship built.

For married couples, section 15.2 of the Divorce Act sets four objectives, and self-sufficiency is only the last of them. Ontario's own Family Law Act carries a parallel list at section 33 (8), and section 30 puts the obligation in one line about need and capacity to pay.

Neither statute allows a fight about blame. Section 15.2 (5) of the Divorce Act says the court "shall not take into consideration any misconduct of a spouse in relation to the marriage", and section 33 (10) of the Family Law Act lets conduct in only where it was "so unconscionable as to constitute an obvious and gross repudiation of the relationship". An affair is neither a defence to a support claim nor a reason for a larger one.

The arithmetic takes a minute, so here it is

Where no child support is being paid, the formula is two lines. Amount: 1.5% to 2% of the gross income difference for each year of cohabitation, to a maximum of 50%, fixed at 37.5% to 50% once you reach 25 years. Duration: half a year to a full year for each year of cohabitation.

Three boundaries sit around it. The Spousal Support Advisory Guidelines set a ceiling at $350,000 of gross payer income, above which the formula stops being applied automatically, a floor at $20,000, below which there should generally be no amount payable, and a cap that stops the recipient ending up with more than half the couple's combined net income. Tax software works that last one out precisely. For everyone else the Guidelines offer a hand method, "48 percent of the gross income difference", which is what the estimator uses and says so when it bites.

What each disagreement is actually worth

Consider a couple in Mississauga. One earns $115,000 gross, the other $45,000. They moved in together in March 2006, married two years later, and separated in March 2026. Their child is 22 and independent, so no child support is flowing. The lower earner turned 43 the winter before they separated.

Run the formula and the answer is $1,750 to $2,333 a month, with no end date, because twenty years together crosses the line where the Guidelines stop setting one. Now change one fact at a time.

The widest bar is not a disagreement at all. It is the range the formula itself produces, and nothing inside the Guidelines picks a point in it. The Revised User's Guide treats that as the lawyer's job and calls the alternative an error: "a straight positional approach is also an error, e.g. the claimant spouse argues for the high end on amount for the longest duration possible, without explanation, while the payor spouse just seeks the low end of the ranges."

Everything below that bar is a fact question with a dollar value attached. The rest of this guide takes them one at a time.

The start date: the day you moved in, not the day you married

Length of relationship under the Guidelines means the period of cohabitation, including any time before the wedding. Getting this wrong is item (g) on the official list of common errors.

The Guidelines are explicit at section 7.3: "While we use the convenient term 'length of marriage', the actual measure under the Advisory Guidelines is the period of cohabitation. This includes pre-marital cohabitation and ends with separation." The Divorce Act uses the same measure at section 15.2 (4) (a), which asks about "the length of time the spouses cohabited", and the Family Law Act does the same at section 33 (9) (l) (i).

For the Mississauga couple, the two years between moving in and marrying are worth about $204 a month, and far more than that on duration. Eighteen years produces an order ending somewhere between nine and eighteen years out. Twenty years produces one with no end date in it at all. Same people, same incomes, same house, and the difference is which anniversary they count from.

Memories differ and the paperwork thins out fast, so this is worth pinning down early. A lease with both names on it, a joint account opened in a particular month, a change-of-address confirmation: those are the documents that settle it years later.

The income figure: rarely the number on the T4

Support runs on Guidelines income. Section 16 of the Federal Child Support Guidelines builds it from the sources of income under the heading "Total income" on the T1 return, line 15000, and then adjusts it under Schedule III. For an employee with one job it is usually the same number. For anyone else, it often is not.

The Revised User's Guide lists three income errors it still sees regularly: running the numbers on figures nobody has actually agreed on, treating social assistance as income, which it flags for Ontario by name because Ontario Works and ODSP look like income on a bank statement and do not count as it, and failing to gross up non-taxable income so that a tax-free benefit is compared fairly against a taxable salary.

Then there is imputation. Where a court finds someone is capable of earning more than they do, it can attribute the higher figure and calculate on that. It cuts both ways: a payer who takes a lower-paid job after separation can be assessed on the old income, and a recipient who could reasonably work full time can be assessed as though they did. In the Mississauga example, imputing $58,000 to the lower earner instead of their actual $45,000 takes about $379 a month off the midpoint. Adding a bonus and taxable benefits to the higher earner's $115,000 adds about $350.

A change in income later is its own event rather than an automatic recalculation. Someone who loses a job carries on owing the ordered amount until an agreement or a court changes it, which is why a severance package and a support obligation are worth looking at together.

Which formula applies, and the one this page will not guess

If child support is being paid for a dependent child of the relationship, a different formula applies, and it cannot be done in a browser.

That formula works on individual net disposable income: each household's income after tax, after child support, and after government benefits and credits, with the recipient landing somewhere between 40% and 46% of the combined pool. The Guidelines say plainly that "net income computations will usually require computer software", which is why family law offices run licensed software for it.

A rule of priority sits underneath. Under section 15.3 of the Divorce Act, a court considering both applications gives priority to child support, and where that leaves no room for spousal support it records its reasons. Section 15.3 (3) then treats a later reduction or ending of child support as a change of circumstances, which is how support can appear years after a separation once the children are grown.

One trap here is the one the Guidelines' own authors call "the single most common and most significant mistake": leaving out the section 7 contributions to a child's special or extraordinary expenses. Miss them and the payer pays too much spousal support, "possibly way too much if the s. 7 expenses are substantial." Our guide to child support in Ontario sets those out, and the one on parenting arrangements covers the time-sharing underneath them.

How long spousal support Ontario orders actually last

Duration runs from half the length of the relationship to its full length, unless one of two conditions removes the end date. Both are arithmetic, and neither depends on anything a judge weighs.

"Indefinite" is the word the Guidelines use, and it causes more misunderstanding than any other term in this area. Section 7.5.2 adopts a word long used in spousal support law to mean "an order for support without a time limit at the time it is made", then adds that it "does not necessarily mean permanent support, and it certainly does not mean that support will continue indefinitely at the level set by the formula." Indefinite orders get varied when incomes change and when people retire. The end date is simply not fixed at the start.

The other half of that lesson runs the opposite way. Where duration is limited, it marks the end of entitlement, and support can stop while an income gap is still there. Any interim support already paid counts inside the durational range rather than sitting outside it.

Death does not end it either, at least not automatically. Section 34 (4) of the Family Law Act says a support order binds the payer's estate unless the order provides otherwise, which is why support belongs in the conversation about estate planning rather than after it.

Ontario's own rule for partners who never married

Spousal support Ontario law reaches unmarried partners too, on a definition set by the province rather than by Parliament. There is no divorce to file, and the claim runs under the Family Law Act instead.

Section 29 of the Act extends the word spouse to two people who are not married to each other and have cohabited "continuously for a period of not less than three years", or who are "in a relationship of some permanence" and are the parents of a child. Three years of living together is the threshold most people hit. The parent route has no minimum period.

Two timing rules sit on either side of that claim and point in opposite directions. Property is unforgiving: section 7 (3) of the Family Law Act bars an equalization application after the earliest of two years from a divorce, six years from separation, and six months from a first spouse's death. Support is the opposite, because section 16 (1) (c) of the Limitations Act, 2002 sets no limitation period at all for a Family Law Act support proceeding. Delay still weakens a claim on its merits, but the door does not lock the way the property door does.

A domestic contract can settle support in advance, and it usually holds. Section 33 (4) lets a court set aside a support term or a waiver in three situations only: unconscionable circumstances, a person waiving who qualifies for public support, or default already under the contract. That is a real gate rather than a formality, and it is the reason a separation agreement that deals with support is worth getting right the first time.

The tax rules that change what the number is worth

Periodic spousal support is deductible to the payer and taxable to the recipient. Lump sums generally are not, which makes the two worth very different amounts even when they add to the same total. Three of the Canada Revenue Agency's rules are worth knowing before a number gets agreed.

That last pair surprises people. The person seeking support can deduct the cost of the lawyer who gets it; the person paying cannot deduct the cost of the lawyer who argues about it, and that changes the real cost of a negotiation on each side of the table. It is worth reading against what a lawyer costs in Ontario before assuming the two of you face the same bill. The lump sum line has a similar sting: because no deduction attaches, the Guidelines' authors say a lump sum built from the monthly ranges "must be discounted or reduced to reflect that tax fact."

Enforcement is the other half of the plumbing. Every spousal support Ontario order carries a support deduction order under section 10 (1) of the Family Responsibility and Support Arrears Enforcement Act, 1996, and section 12 (1) requires the court clerk to file it with the Family Responsibility Office promptly after signing. Leaving that system takes a written notice signed by both people. That order is served on an income source, a term the Act defines to include wages, commissions, pensions and severance pay. The office can also garnish a bank account, put a lien on property, suspend a driver's licence, and charge a $400 administrative fee when it takes enforcement action.

When a spousal support lawyer earns their fee

A spousal support lawyer is rarely being paid for the arithmetic. Most spousal support Ontario negotiations turn on the inputs, and that is what the fee buys.

The situations where advice changes the outcome tend to look alike:

• The income is not a simple salary. Self-employment, a corporation, commissions, a variable bonus, or income earned outside Canada.
• The relationship straddles a threshold. Nineteen or twenty years together, or a rule of 65 total sitting close to 65.
• Someone is waiving support. Waivers signed without advice are the ones most often reopened under section 33 (4) of the Family Law Act.
• A lump sum is on the table. The tax discount and the loss of any later variation both need pricing.
• The other side has counsel and you do not. The ranges are wide, and the side that can explain a point inside one tends to get it.

Checking a number is a far smaller piece of work than running a contested application, and the hourly rates behind both are set out in our guide to family lawyer rates in Toronto. Where support is one item in a larger separation, what a divorce costs in Ontario puts it against the rest of the bill.

How Olanur helps

We built Olanur because the hardest part of a support question is usually finding someone qualified to answer it quickly. You describe the situation in plain language, our matching system reads it, and you get lawyers who actually practise family law in your part of Ontario rather than a directory page sorted by who paid for placement.

Across the family requests we see, support and parenting arrive together far more often than either arrives alone, which is worth saying in your request. Matching is free, with no obligation to hire anyone you speak with. Our guide to family law situations in Canada covers the wider picture, and how to find a lawyer in Canada covers what to ask once you are in the room.

Frequently asked questions

Spousal support Ontario outcomes turn on a short list of facts that get settled long before anyone opens a calculator: whether there is entitlement, which incomes are used, and which date the relationship started on. Pin those down, in writing, with the documents that prove them, and the formula does the rest in a minute.

If a number has been put to you and you are not sure what is behind it, the useful next step is a single conversation with someone who runs these calculations weekly. You can get matched with a family lawyer in Ontario at no cost, and Steps to Justice has a plain-language overview of spousal support worth reading first.