Child Support with 50/50 Custody in Ontario: Complete 2026 Guide

In Ontario, having 50/50 parenting time does not eliminate child support. Under Section 9 of the Federal Child Support Guidelines, when each parent has the child at least 40% of the year, courts apply the set-off method: the higher-earning parent pays the difference between both parents' table amounts. Income, not time, drives the obligation.

This is the single most misunderstood rule in Ontario family law. Thousands of separating parents assume that equal parenting time means neither parent pays support. The opposite is usually true. The Federal Child Support Guidelines treat shared parenting as a trigger for a specific calculation method, not as a reason to cancel support. If you earn more than your co-parent, you will almost certainly pay something—even with a perfect 50/50 schedule.

Key Facts: Child Support and 50/50 Custody in Ontario

Do You Pay Child Support with 50/50 Custody in Ontario?

Yes. The filing of equal parenting time does not cancel child support in Ontario—if there is an income difference between the parents, the higher earner pays a set-off amount. Under Section 9 of the Federal Child Support Guidelines, child support in shared parenting situations is based on each parent's income, the increased costs of two households, and each child's circumstances. Time alone does not erase the obligation.

The reasoning is rooted in the purpose of child support itself. Child support belongs to the child, not the parent, and its goal is to give the child a comparable standard of living in both homes. When one parent earns $100,000 and the other earns $40,000, identical parenting schedules cannot produce identical households without a financial transfer. A child should not experience a materially lower standard of living simply by walking from one parent's door to the other's. For this reason, the question "do I still pay child support with joint custody?" almost always resolves in favour of some payment from the higher earner. Equal custody child support is calculated, not waived, and the calculation begins the moment each parent crosses the 40% parenting-time threshold defined in the Guidelines.

The 40% Threshold: When Shared Parenting Rules Apply

Shared parenting rules in Ontario activate when each parent has the child for at least 40% of the year, which equals approximately 146 days annually, or roughly 4.5 days per week averaged across the year. This 40% threshold under Section 9 of the Federal Child Support Guidelines is the gateway to the set-off method. Below 40%, the standard table amount applies based on the paying parent's income alone.

The 40% figure is calculated over a full calendar year, not week by week. Courts count the time the child is in each parent's care, including overnights, holidays, school breaks, and—per the 2021 Divorce Act definition—time when the child is at school but under that parent's parenting time. A true 50/50 schedule comfortably exceeds the 40% minimum for both parents, so shared parenting child support rules clearly apply. The threshold matters most in arrangements near the boundary, such as a 60/40 split, where one parent argues they have crossed 40% to access the set-off method. The burden of proof falls on the parent seeking the set-off—usually the higher earner—who must prove on a balance of probabilities that they actually meet 40%. If the math is too close to call, Ontario courts often revert to the full table amount to protect the stability of the child's primary household.

How the Set-Off Method Works for Shared Custody Child Support

The set-off method calculates child support for 50/50 parenting time by determining what each parent would owe under the federal tables based on their income, then having the higher earner pay the difference to the lower earner. For example, if Parent A earns $80,000 and owes $710 monthly under the tables, while Parent B earns $50,000 and owes $439, Parent A pays the $271 difference each month.

The calculation follows a clear sequence. First, you find each parent's table amount using their individual annual income and the number of children, drawn from the Federal Child Support Tables for Ontario. Second, you subtract the lower amount from the higher amount. Third, the parent with the higher table amount pays that net difference to the other parent. This single transfer replaces two notional payments flowing in opposite directions. The set-off works because both parents are presumed to be directly spending money on the child during their own parenting time, so only the differential needs to change hands. The greater the income gap, the larger the set-off payment. When two parents earn nearly identical incomes, the set-off can shrink to almost nothing—but it is the income equality, not the equal schedule, that produces that result. The 50/50 parenting time support figure is always anchored to the income comparison.

Contino v. Leonelli-Contino: The Set-Off Is Only a Starting Point

The set-off amount is a presumptive starting point, not an automatic right, under the Supreme Court of Canada's decision in Contino v. Leonelli-Contino, 2005 SCC 63. The Court ruled that judges must consider the full financial picture—the actual increased costs of maintaining two households and the conditions, means, and needs of each parent—before settling on a final number. A judge can order more or less than the straight set-off.

This is the rule that surprises high earners. Even with exactly 50/50 parenting time, a parent whose income vastly exceeds the other's may end up paying an amount closer to the full table figure rather than the smaller set-off difference. The Supreme Court rejected a purely mechanical approach because the set-off can sometimes leave the lower-income household unable to provide a comparable standard of living. Under Section 9, the three factors a court must weigh are: (a) the table amounts for each parent, (b) the increased costs of shared parenting arrangements, and (c) the conditions, means, needs, and other circumstances of each parent and child. Contino requires judges to examine real budgets—actual housing, food, and child-related expenses in both homes—rather than assuming the set-off automatically achieves fairness. Parents negotiating shared custody child support should treat the set-off as the opening position in a discussion, not the guaranteed outcome.

The October 2025 Federal Table Update

The Federal Child Support Tables were updated effective October 1, 2025—the first comprehensive revision since 2017—and these figures are the standard for all new orders in 2026. The updated tables reflect modern tax rules, current cost of living, and revised social policy. Sample 2025 figures for one child include $556/month at $60,000 income, $710/month at $80,000, and $1,485/month at $100,000.

The update matters for both new and existing arrangements. New orders and agreements made after October 1, 2025 must use the current tables; the 2017 figures no longer apply to them. However, existing orders do not update automatically. If your parenting order or support order predates October 1, 2025, it remains at the original amount until you take action to vary it. This creates a practical issue for 50/50 families: a set-off calculated under the old 2017 tables may differ from one calculated under the 2025 tables, because both parents' table amounts have shifted. Parents with shared parenting arrangements should recalculate their set-off under the current tables to confirm whether their existing payment is still accurate. A material change in the table figures, combined with an income change, can support a request to vary the order. Always run the equal custody child support numbers against the version of the tables in force when the order was made versus the current version.

Section 7 Special and Extraordinary Expenses

Section 7 expenses are handled separately from the set-off amount and are divided between parents in proportion to their incomes, not their parenting time. Under Section 7 of the Federal Child Support Guidelines, these special or extraordinary expenses include child care, medical and dental premiums, health expenses over $100/year, extraordinary education costs, post-secondary expenses, and significant extracurricular activities. A parent earning 65% of the combined income typically pays 65% of these costs.

This proportional split applies on top of the base support transfer, which is why a 50/50 parenting family can still face substantial support obligations. Consider two parents who earn $90,000 and $60,000, a combined income of $150,000. The higher earner accounts for 60% of that total and therefore pays 60% of every qualifying Section 7 expense—daycare, orthodontics, competitive hockey fees, or university tuition—regardless of which parent's house the child sleeps in that night. Section 7 expenses must be both necessary in relation to the child's best interests and reasonable in relation to the family's means before they qualify. Courts often require the parent claiming an expense to provide receipts and advance notice. For families with young children in full-time care or teenagers in expensive activities, Section 7 obligations frequently exceed the base set-off amount itself. Equal parenting time provides no discount on these proportional costs.

Agreements Below the Guidelines May Be Rejected

Parents cannot simply agree to waive child support, even with 50/50 parenting time, because child support is the right of the child, not the parent. Ontario courts and judges reviewing divorce applications routinely reject settlement agreements that fall below the guideline minimums. A clause stating that the arrangement is "fair" does not, by itself, make it enforceable. Judges have refused to grant divorces specifically because the proposed child support did not meet guideline requirements.

This principle catches many amicable couples off guard. Two parents who genuinely believe their 50/50 schedule justifies zero support may draft a separation agreement to that effect, only to have a court decline to incorporate it. The court's role is to protect the child's entitlement, and that entitlement cannot be bargained away by the parents. There are narrow exceptions—Section 9's discretion can produce a low or zero figure when both incomes are genuinely comparable and both households are adequately resourced—but the parents must show their work. A bare agreement waiving support, without disclosure of both incomes and a Section 9 analysis, is unlikely to survive judicial scrutiny. The safest course is full financial disclosure from both parents, a documented set-off calculation, and a written explanation of any deviation grounded in Contino factors. This protects the agreement from being set aside later and shields both parents from a future claim of unpaid support.

Income Disclosure and Imputing Income

Both parents must provide full income disclosure in a 50/50 arrangement, because the set-off depends entirely on comparing accurate incomes. When a parent under-reports earnings or is intentionally underemployed, Ontario courts can impute income under Section 19 of the Federal Child Support Guidelines, assigning a figure that reflects true earning capacity. Once income is imputed, the tables apply to that higher figure, increasing the set-off the under-reporting parent must pay.

The leading Ontario authority is Drygala v. Pauli, 2002 CanLII 41868 (ON CA), which established a three-part test for imputing income based on intentional underemployment: whether the parent is intentionally underemployed, whether the underemployment is required by the needs of a child or reasonable health or education needs, and what income is appropriately imputed given earning capacity, work history, education, and available opportunities. Ontario Regulation 391/97 sets out the circumstances permitting imputation, including unreported income, failure to disclose, and intentional underemployment. In shared parenting cases, accurate disclosure is especially critical because both incomes feed the calculation—an inflated income for one parent or a deflated income for the other distorts the entire set-off. Courts can draw an adverse inference against a parent who fails to disclose, and in 2026 cases such as Odigie v. Egharevba, 2026 ONSC 3024, judges have imputed income and ordered retroactive support reaching beyond the usual three-year window where a payor's conduct was blameworthy.

Enforcement Through the Family Responsibility Office

The Family Responsibility Office (FRO) enforces child support orders in Ontario, including set-off payments in 50/50 arrangements, under the Family Responsibility and Support Arrears Enforcement Act, 1996. Every support order is automatically filed with the FRO, which collects, distributes, and enforces payments. The FRO can garnish wages, seize bank accounts, suspend driver's licences, cancel passports, and report defaulters to credit bureaus—and may charge a $400 administrative fee for default.

A critical limitation is that the FRO enforces but never changes support amounts. The FRO does not decide how much you owe and will not reduce the amount because your income dropped; it enforces the current order or filed agreement until a court formally changes it. This means a parent in a 50/50 arrangement whose income falls cannot simply stop paying the set-off—they must apply to vary the order first. Until the variation is granted, the FRO continues collecting the original amount, and arrears accrue with 3% annual interest. A $50,000 retroactive arrears balance from five years ago grows to roughly $58,000 with interest. For shared parenting families, the lesson is to keep the support order current: if parenting time shifts or incomes change, formalize the new set-off through the court or the Online Child Support Service rather than relying on an informal handshake, which the FRO cannot recognize.

Residency, Separation, and Filing Requirements

To obtain a divorce in Ontario, at least one spouse must be ordinarily resident in the province for one year immediately before filing, under Section 3(1) of the Divorce Act, R.S.C. 1985, c. 3 (2nd Supp.). The sole ground for divorce is marriage breakdown, most commonly proven by living separate and apart for one year under Section 8. Filing fees total $669 in provincial fees plus a $10 federal fee, for a minimum court cost of $679 (as of January 2026—verify with your local court).

The one-year residency requirement and the one-year separation requirement are distinct. Residency concerns where you have ordinarily lived; separation concerns how long you have lived apart from your spouse. You can file the application before the separation year is complete, but the divorce judgment cannot be granted until one full year of separation has passed. Couples may attempt reconciliation for up to 90 cumulative days under Section 8(3) without restarting the separation clock. Spouses can even be "separate and apart" while living under the same roof if they maintain separate finances, sleep apart, and present themselves to others as separated. The provincial filing fees are payable in two installments—$224 when the Divorce Application is issued and $445 when the Affidavit for Divorce is filed—plus the mandatory $10 federal fee to the Central Registry of Divorce Proceedings under SOR/86-547. Fee waivers are available for recipients of Ontario Works or ODSP, though the $10 federal fee cannot be waived. Beginning January 1, 2026, Ontario court fees are subject to periodic CPI indexing, so always confirm the current schedule on Ontario's e-Laws website before filing.

2021 Divorce Act Terminology: Parenting Time and Decision-Making Responsibility

The 2021 Divorce Act amendments, in force March 1, 2021, replaced "custody" and "access" with "decision-making responsibility" and "parenting time." Under Section 16.1 of the Divorce Act, a court may make a parenting order allocating parenting time and decision-making responsibility to either or both parents. The reforms reframe parenting as a child-focused responsibility rather than a parental right, with all arrangements determined solely by the best interests of the child.

For Ontario families this means the legal vocabulary has shifted, even though the colloquial phrase "50/50 custody" remains common. "Parenting time" refers to the time a child spends in a parent's care, including school hours during that parent's period. "Decision-making responsibility" covers significant decisions about the child's health, education, culture, language, religion, and major extracurricular activities, and may be allocated to one parent, both parents jointly, or a third person. Importantly, there is no legal presumption of equal parenting time under the 2021 Divorce Act—the child's best interests are the only consideration, with the child's physical, emotional, and psychological safety as the primary factor. Orders made after March 1, 2021 must use the new terminology, while pre-2021 "custody" orders remain valid until varied. The terminology change is not, by itself, a change in circumstances justifying a variation. When negotiating shared parenting child support, draft your agreement using the current statutory language to ensure enforceability.