Six free calculators for common Ontario family law questions: the child support table amount, section 7 expenses, parenting time, spousal support, family law deadlines and net family property. Each one runs in your browser, explains its formula and cites the law it relies on. When you have a number, we can go through it with you in a free consultation.
Can you calculate Ontario family law numbers yourself? For child support, largely yes — the basic table amount is set by the Federal Child Support Guidelines and follows directly from the payor’s gross annual income, the number of children and the province. For property division, the equalization payment follows a defined formula under Ontario’s Family Law Act, though the valuations that feed it are often disputed. What a calculator cannot settle is entitlement, imputed income, shared-parenting adjustments under section 9, or whether spousal support is owed at all — those turn on facts and argument, not arithmetic. Treat any calculator figure as a starting point for a conversation, not an answer.
Each calculator covers a different part of a separation. They are free and anonymous: nothing you enter is sent to us or stored.
Available now · free
Finds the basic monthly child support amount for 1 to 6 or more children under the Ontario table of the Federal Child Support Guidelines in force from October 1, 2025, including incomes over $150,000.
Available now · free
Estimates each parent’s share of parenting time from a regular schedule, to show whether the 40 percent threshold in section 9 of the Federal Child Support Guidelines may be reached.
Available now · free
Splits special or extraordinary expenses, such as childcare or activity costs, between parents in proportion to their incomes.
Available now · free
Gives a rough range based on the Spousal Support Advisory Guidelines for couples without dependent children. It does not decide whether support is owed.
Available now · free
Shows key dates that follow from a separation, divorce or death, such as the earliest date a divorce can be granted and property claim time limits.
Available now · free
Estimates each married spouse’s net family property and the resulting equalization payment under Ontario’s Family Law Act.
For background, read our guide to calculating child support in Ontario, or contact us and we will walk you through the numbers.
A calculator can be accurate for what it measures. The difficulty in most real cases is not the arithmetic — it is agreeing on the numbers that go into it. The most commonly contested inputs are:
Total income (line 15000 of the T1 return, Guidelines s. 16) is the starting point, not the finish. Self-employment, corporate income, bonuses, stock compensation and non-taxable benefits are all routinely adjusted. Where a payor is intentionally under-employed or has not disclosed properly, a court can impute income — a figure no calculator can predict.
Equalization is measured at the valuation date, usually the date the spouses separated with no reasonable prospect of resuming cohabitation (Family Law Act, s. 4(1)), and establishing that date is itself sometimes in dispute. Pensions, business interests and property owned before the marriage all require proper valuation before the formula produces a meaningful number.
Spousal support requires establishing entitlement first, and the Spousal Support Advisory Guidelines then produce a range rather than a figure. Read how spousal support is determined in Ontario.
Equalization of net family property applies to married spouses only. Common-law partners in Ontario have no automatic right to property division and must advance a different kind of claim, such as unjust enrichment or a constructive trust.
The basic amount comes from the Ontario table in the Federal Child Support Guidelines and depends on the payor’s gross annual income and the number of children. On top of that, section 7 special and extraordinary expenses — childcare, health costs, and some education and activity costs — are usually shared in proportion to each parent’s income.
Yes. They are free, need no sign-up, and the calculations run in your browser: nothing you enter is sent to Tailor Law or stored. You can also book a free consultation and we will work through your figures with you.
Often it is close for the basic table amount of child support, because that figure is set by regulation. It is far less predictable for equalization, arrears and anything involving shared parenting, where the inputs themselves are frequently contested. Treat the output as an informed estimate.
Under Ontario’s Family Law Act, each married spouse totals the value of their assets less debts at the date of separation, then deducts the net value of what they brought into the marriage. The spouse with the higher net family property pays the other half of the difference. The matrimonial home receives special treatment and is generally not deducted even if one spouse owned it before the marriage.
Because of section 9 of the Guidelines. Once a parent has the children at least 40 percent of the time, child support is no longer simply the table amount — the court considers the set-off between both parents’ table amounts, the increased costs of shared parenting, and the circumstances of each household.
The FRO enforces support orders and agreements filed with it. Its powers include garnishing wages and bank accounts, suspending a driver’s licence, reporting to credit bureaus, and bringing a defaulting payor before the court. Arrears do not expire simply because time has passed.
Bring your figures to a consultation and we will tell you where they hold up, where the other side is likely to push back, and what the realistic range actually looks like.
Book Your Free 30-Minute Consultation
Or call (905) 366-0202 · info@tailorlaw.com
These calculators provide general estimates based on Ontario family law and are not legal advice. Results depend entirely on the accuracy of the figures entered and on facts a calculator cannot assess. Speak with a lawyer before relying on any number for a settlement or court filing.
Our experienced family law team is ready to help. Book a confidential consultation today.
Book Your Free 30-Minute ConsultationOr call us: (905) 366-0202