FCSG s. 9 Shared-Custody Threshold
Parenting Time Calculator (Canada)
Free parenting-time calculator. Determine each parent's annual percentage and whether the 40% shared-custody threshold under FCSG s. 9 is met — the gateway to Contino set-off analysis.
Try a preset:
Parent A
50.1%
183 of 365 days
Parent B
49.9%
182 of 365 days
FCSG s. 9 — 40% Threshold
Likely engaged — minority parent at 49.9% by overnights. Indicates set-off + Contino may apply.
Jan 2026
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Feb 2026
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Mar 2026
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Apr 2026
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May 2026
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Jun 2026
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Jul 2026
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Aug 2026
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Sep 2026
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Oct 2026
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Nov 2026
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Dec 2026
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What this schedule means for child support
On a day-count basis, the minority parent exercises 49.9% of parenting time — at or above the 40% threshold under section 9 of the Federal Child Support Guidelines. This is an estimate only: courts have not settled on a single way to measure the 40%, and weigh the time a child is in a parent’s care and control (allocating sleep, school and daycare hours), with “no universally accepted method” (Froom v. Froom, 2005 ONCA 922) — overnights are a common proxy, but Ontario case law often prefers an hours-of-care-and-control measure. Where s. 9 is engaged, the court applies the Contino v. Leonelli-Contino, 2005 SCC 63 framework: each parent’s table amount is set off, then adjusted for the increased costs of shared parenting and the parties’ means and circumstances. The result is a discretionary range, not the full table amount.
Click a preset to paint a year. Click any day to cycle Parent A → Parent B → unassigned.
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Frequently Asked Questions
What is the 40% threshold?
Section 9 of the Federal Child Support Guidelines provides that where a spouse exercises a right of access to, or has physical custody of, a child for not less than 40% of the time over the course of a year, the court has discretion to depart from the standard table amount under s. 3.
How is parenting time counted?
The method of measuring the 40% is unsettled and fact-specific — there is "no universally accepted method" (Froom v. Froom, 2005 ONCA 922). Courts consider the time the child is in a parent's care and control, which means allocating sleep, school and daycare hours, not just counting overnights. Counting overnights and dividing by 365 is a common proxy, but Ontario case law often prefers an hours-of-care-and-control measure. This calculator counts days as an estimate; it does not determine which method a court will use.
What happens above 40%?
Once the 40% threshold is met, the court applies Contino v. Leonelli-Contino, 2005 SCC 63: (a) compute each parent's straight set-off table amount; (b) consider the increased costs of shared custody; (c) consider the conditions, means, needs and other circumstances of each spouse and child. The result is a discretionary range rather than a fixed amount.
What if it's very close to 40% (e.g., 39%)?
Courts generally treat the 40% threshold as a hard gate, but evidence-quality matters. If the calculation produces 39-41%, document overnights carefully — diaries, school pick-up records, calendar entries. Some courts have applied s. 9 below 40% where the access pattern was unique, but this is rare.
Does this affect the table amount even if I don't meet 40%?
No. Below 40% parenting time, FCSG s. 3 applies — the full table amount based on the payor's gross income, number of children, and province is presumptively payable. The s. 9 discretion only opens up at the 40% gateway.