Spousal support duration in Ontario ranges from 0.5 to 1.0 years of support for each year of marriage or cohabitation under the Spousal Support Advisory Guidelines (SSAG), with support becoming indefinite (no specified end date) after marriages lasting 20 years or longer, or when the recipient spouse qualifies under the Rule of 65. The Rule of 65 provides indefinite support when the years of marriage plus the recipient's age at separation equals or exceeds 65, even for marriages shorter than 20 years. For a typical 10-year marriage in Ontario, spousal support duration would range from 5 to 10 years, while a 5-year marriage would typically result in 2.5 to 5 years of support payments.
Key Facts: Ontario Spousal Support Duration
| Factor | Details |
|---|---|
| Duration Formula | 0.5 to 1.0 years per year of marriage |
| Indefinite Threshold | 20+ years of marriage |
| Rule of 65 | Marriage years + age at separation = 65+ |
| Minimum Marriage for Rule of 65 | 5 years |
| Governing Law | Divorce Act, R.S.C. 1985, c. 3, s. 15.2 |
| Provincial Law | Family Law Act, R.S.O. 1990, c. F.3, s. 33 |
| Filing Fee | $669 (two installments: $224 + $445) |
| Residency Requirement | 1 year in Ontario before filing |
How Long Does Alimony Last in Ontario: The Basic Duration Formula
Ontario courts determine how long alimony lasts using the Spousal Support Advisory Guidelines (SSAG), which establish that support duration ranges from 0.5 to 1.0 years for each year of marriage or cohabitation, with a maximum cap that makes support indefinite after 25 years of marriage under the without-child formula. The SSAG provides two distinct formulas for calculating both the amount and duration of spousal support: the Without Child Support Formula for couples without dependent children, and the With Child Support Formula when children remain dependent. Under Divorce Act, R.S.C. 1985, c. 3, s. 15.2(3), courts may order support for a definite or indefinite period or until a specified event occurs.
The duration calculation depends heavily on the length of the relationship. For a marriage lasting 8 years, Ontario courts would typically order spousal support for 4 to 8 years under the SSAG guidelines. A 15-year marriage would result in support lasting 7.5 to 15 years at the low and high ends of the range. These ranges provide negotiating parameters for settlement discussions and judicial decision-making, though judges retain discretion to deviate from the guidelines in appropriate circumstances.
Duration Examples by Marriage Length
| Marriage Duration | Low End (0.5 years/year) | High End (1 year/year) | Notes |
|---|---|---|---|
| 3 years | 1.5 years | 3 years | Short marriage provisions apply |
| 5 years | 2.5 years | 5 years | Rule of 65 minimum threshold |
| 10 years | 5 years | 10 years | Standard formula range |
| 15 years | 7.5 years | 15 years | Approaching indefinite territory |
| 20+ years | Indefinite | Indefinite | No end date specified |
The Rule of 65: When Spousal Support Becomes Indefinite
The Rule of 65 provides indefinite spousal support when the years of marriage plus the recipient spouse's age at separation equals or exceeds 65, creating a pathway to indefinite support even for marriages shorter than 20 years. Under this formula, a recipient spouse aged 50 at separation after a 15-year marriage (50 + 15 = 65) qualifies for indefinite support rather than the 7.5 to 15-year range that would otherwise apply. The Rule of 65 requires a minimum marriage duration of 5 years; couples married fewer than 5 years cannot qualify regardless of the recipient's age at separation.
Indefinite support under the Rule of 65 does not mean permanent or lifetime support. The term "indefinite" in Ontario family law means no automatic end date is specified in the support order, but the paying spouse retains the right to seek variation or termination if circumstances change materially. Recipients who achieve self-sufficiency, remarry, or experience significant improvement in their financial circumstances may see their indefinite support reduced or terminated through a motion to change under Divorce Act, R.S.C. 1985, c. 3, s. 17.
Rule of 65 Qualification Examples
| Age at Separation | Years Married | Total | Qualifies for Indefinite? |
|---|---|---|---|
| 45 | 20 | 65 | Yes |
| 50 | 15 | 65 | Yes |
| 55 | 10 | 65 | Yes |
| 60 | 5 | 65 | Yes (minimum 5 years met) |
| 62 | 3 | 65 | No (marriage under 5 years) |
| 40 | 15 | 55 | No (use standard formula) |
Short Marriage Spousal Support Duration in Ontario
Ontario courts generally consider marriages lasting less than 5 years to be short-term, and spousal support duration for these relationships typically follows the standard 0.5 to 1 year per year formula without access to the Rule of 65 provisions. For a 3-year marriage, spousal support would last 1.5 to 3 years under SSAG guidelines, while a 4-year marriage would result in support lasting 2 to 4 years. Short marriages rarely result in indefinite support orders unless exceptional circumstances exist, such as permanent disability arising during the marriage or immigration sponsorship agreements.
The SSAG without-child-support formula calculates support amount as 1.5% to 2.0% of the difference between the spouses' gross annual incomes, multiplied by the number of years of marriage or cohabitation, with a maximum range of 37.5% to 50% of the gross income difference reached at 25 years. For short marriages, this typically results in relatively modest support amounts for limited durations. However, even in short marriages, if one spouse made significant financial or career sacrifices that created lasting economic disadvantages, courts may extend duration beyond the guideline ranges to address compensatory needs.
When Does Alimony End in Ontario: Automatic Termination Events
Spousal support in Ontario automatically terminates only upon the death of the recipient spouse or when a time-limited support order reaches its specified end date, according to established Ontario family law principles. Contrary to common belief, the remarriage or cohabitation of the recipient spouse does not automatically terminate spousal support obligations in Ontario. Under SSAG section 14.7, remarriage or repartnering of the support recipient does not lead to automatic termination; instead, the support amount may be reduced or terminated based on the changed circumstances.
The paying spouse seeking to reduce or terminate support due to the recipient's remarriage or new relationship must bring a Motion to Change under Divorce Act, R.S.C. 1985, c. 3, s. 17 or Family Law Act, R.S.O. 1990, c. F.3, s. 37, demonstrating a material change in circumstances. The court will consider whether the new relationship has improved the recipient's financial situation and whether ongoing support remains appropriate based on the original basis for the award (compensatory versus needs-based).
Termination and Variation Triggers
| Event | Automatic Termination? | Action Required |
|---|---|---|
| Death of recipient | Yes | None |
| End date in order reached | Yes | None |
| Recipient remarriage | No | Motion to Change required |
| Recipient cohabitation | No | Motion to Change required |
| Payor job loss | No | Motion to Change required |
| Recipient self-sufficiency | No | Motion to Change required |
| Payor retirement | No | Motion to Change required |
Compensatory vs. Needs-Based Support: Duration Differences
Ontario recognizes two primary types of spousal support with different duration implications: compensatory support, which addresses economic disadvantages arising from roles during the marriage, and needs-based (non-compensatory) support, which addresses the recipient's ongoing financial needs regardless of marital roles. Compensatory support typically lasts longer because it compensates for lasting economic harm, such as career interruption to raise children or relocation to support a spouse's career advancement. Under Family Law Act, R.S.O. 1990, c. F.3, s. 33(8), courts must recognize the spouse's contribution to the relationship when determining support.
Needs-based support is more vulnerable to reduction or termination when the recipient's circumstances improve through remarriage, new employment, or other means. If the recipient's financial need diminishes due to a new relationship that provides economic support, the paying spouse may successfully argue for termination through a variation motion. Compensatory support, however, may continue even after remarriage because the economic disadvantage it addresses (such as career advancement opportunities lost during the marriage) persists regardless of the recipient's new relationship status.
How to Modify Spousal Support Duration in Ontario
Modifying spousal support duration in Ontario requires demonstrating a material change in circumstances that was not contemplated at the time of the original order, with the onus on the applicant to prove the change would likely have resulted in different terms had it existed when the order was made. Under Divorce Act, R.S.C. 1985, c. 3, s. 17, the court must satisfy itself that a change in the condition, means, needs, or other circumstances of either former spouse has occurred since the original order before making a variation order.
Material changes that may justify modifying support duration include: substantial and lasting income changes for either party (job loss exceeding 6 months, significant promotion, or income reduction), serious illness or disability affecting either spouse's earning capacity, retirement of the paying spouse at a normal retirement age, or the recipient achieving reasonable self-sufficiency through employment or training. The test for material change is stringent: the change must be one the original court did not foresee and cannot be considered to have taken into account when making the initial order.
Steps to Vary Spousal Support Duration
- Document the material change with evidence (employment records, medical reports, financial statements)
- File a Motion to Change (Form 15) with the Ontario Superior Court of Justice
- Pay the court filing fee (approximately $224 for the motion)
- Serve the motion materials on your former spouse
- Attend the case conference and any subsequent hearings
- Present evidence demonstrating the change was not contemplated in the original order
Common Law Couples: Spousal Support Duration Rights
Unmarried common law couples in Ontario may claim spousal support under Family Law Act, R.S.O. 1990, c. F.3, s. 29 if they have cohabited continuously for at least 3 years, or are in a relationship of some permanence and have a child together. The SSAG duration formulas apply equally to common law relationships, with support lasting 0.5 to 1 year per year of cohabitation, and the Rule of 65 available for qualifying relationships of 5 or more years. Common law partners who separate after 10 years of cohabitation would receive support for 5 to 10 years under the standard SSAG formula.
The key difference for common law couples lies in property division rather than support duration. While common law partners have equivalent rights to spousal support under the Family Law Act, they do not have automatic rights to property equalization under Part I of the Act. Support duration calculations for common law couples follow the same SSAG principles as married couples, measuring the relationship from the date cohabitation began to the date of separation. Common law couples must prove their cohabitation dates to establish the duration calculation baseline.
Filing for Divorce and Spousal Support in Ontario: Procedural Requirements
Filing for divorce in Ontario requires meeting the one-year residency requirement under Divorce Act, R.S.C. 1985, c. 3, s. 3(1), meaning at least one spouse must have ordinarily resided in Ontario for at least one year immediately before filing the application. The total court filing fees for a sole divorce application are $669, paid in two installments: $224 when filing the initial Divorce Application (Form 8A) and $445 when filing the Affidavit for Divorce. Joint divorce applications require a filing fee of $632. An additional $10 mandatory fee goes to the federal Central Registry of Divorce Proceedings.
Applicants receiving Ontario Works, ODSP, or meeting specific low-income thresholds may apply for a fee waiver that covers the $669 court fee entirely. The divorce application must include a claim for spousal support if you seek a support order as part of the divorce proceedings. Support claims can also be made under the Family Law Act through a separate application without filing for divorce. As of October 2025, online filing portals are available: the Ontario Courts Public Portal for Toronto-region matters and the Justice Services Online portal for matters outside Toronto.
Factors Courts Consider When Determining Support Duration
Ontario courts exercise discretion within the SSAG framework when determining how long alimony lasts, considering multiple factors beyond simple marriage length calculations. Under Family Law Act, R.S.O. 1990, c. F.3, s. 33(9), courts consider: each spouse's current assets and means, assets and means each is likely to have in the future, the dependent's capacity to contribute to their own support, and the respondent's capacity to provide support. Courts also consider the four objectives of spousal support orders under Divorce Act, R.S.C. 1985, c. 3, s. 15.2(6).
The objectives include recognizing economic advantages or disadvantages arising from the marriage or its breakdown, apportioning between the spouses any financial consequences arising from care of children, relieving any economic hardship arising from the breakdown of the marriage, and promoting the economic self-sufficiency of each spouse within a reasonable period of time. The self-sufficiency objective particularly influences duration decisions, as courts often structure support orders to decrease over time as the recipient spouse is expected to become increasingly self-supporting through employment, training, or other means.
Frequently Asked Questions
How long does spousal support last in Ontario for a 10-year marriage?
For a 10-year marriage in Ontario, spousal support typically lasts 5 to 10 years under the Spousal Support Advisory Guidelines (SSAG) formula of 0.5 to 1 year of support per year of marriage. The exact duration depends on factors including the age of the recipient at separation, income disparity between spouses, and whether the Rule of 65 applies (recipient age + marriage years = 65 or more).
Does spousal support automatically end when my ex remarries in Ontario?
No, spousal support does not automatically end when your former spouse remarries in Ontario. Under SSAG section 14.7, remarriage does not trigger automatic termination. The paying spouse must file a Motion to Change under section 17 of the Divorce Act, demonstrating that the remarriage constitutes a material change in circumstances that justifies reducing or terminating support.
What is the Rule of 65 for Ontario spousal support?
The Rule of 65 provides indefinite spousal support when the recipient's age at separation plus the years of marriage equals or exceeds 65. For example, a spouse aged 55 at separation after a 10-year marriage (55 + 10 = 65) qualifies for indefinite support. The Rule requires a minimum marriage duration of 5 years; shorter marriages cannot qualify regardless of age.
Can spousal support last forever in Ontario?
Spousal support can be ordered indefinitely in Ontario for marriages lasting 20+ years or when the Rule of 65 applies, but indefinite does not mean permanent or forever. Indefinite support means no automatic end date is set, but the order can be varied or terminated through a Motion to Change if material circumstances change, such as the recipient achieving self-sufficiency.
How long does alimony last for a short marriage (under 5 years) in Ontario?
For marriages under 5 years in Ontario, spousal support typically lasts 0.5 to 1 year per year of marriage. A 3-year marriage would result in 1.5 to 3 years of support; a 4-year marriage would result in 2 to 4 years. Short marriages cannot access the Rule of 65 regardless of the recipient's age at separation.
What triggers early termination of spousal support in Ontario?
The only automatic termination triggers for spousal support in Ontario are death of the recipient or reaching a specified end date in the order. Other potential termination events, including recipient remarriage, new cohabitation, achieving self-sufficiency, or payor retirement, require filing a Motion to Change and proving a material change in circumstances.
How do common law couples calculate spousal support duration in Ontario?
Common law couples in Ontario calculate spousal support duration using the same SSAG formulas as married couples: 0.5 to 1 year of support per year of cohabitation. Common law partners must have cohabited for at least 3 continuous years, or have a child together, to claim spousal support under section 29 of the Family Law Act.
Can I negotiate a shorter spousal support duration than the SSAG suggests?
Yes, spouses can negotiate support duration outside the SSAG ranges through a separation agreement. Courts generally respect freely negotiated agreements unless they are unconscionable or one party did not provide full financial disclosure. Many couples negotiate lump-sum buyouts or fixed-term support shorter than SSAG guidelines in exchange for other concessions in property division.
What happens to spousal support when the paying spouse retires in Ontario?
Retirement at a normal age (typically 65) may constitute a material change in circumstances justifying support reduction or termination. However, retirement is not an automatic termination event. The payor must file a Motion to Change and demonstrate reduced income. Courts consider whether retirement was foreseeable when the original order was made and whether the recipient had time to plan for reduced support.
How does spousal support duration differ from child support duration in Ontario?
Child support under the Federal Child Support Guidelines continues until the child is no longer a dependent, typically age 18 or longer if pursuing education. Spousal support duration under the SSAG is based on relationship length (0.5-1 year per year of marriage) and may be indefinite for long marriages. Child support takes priority; spousal support may be reduced if combined obligations exceed the payor's ability to pay.