How to prepare for divorce in Ontario - the pre-filing checklist

Most of the work of an Ontario divorce happens before you file anything. Preparing properly — confirming the separation date, gathering financial documents, settling parenting, running the support numbers, and signing a separation agreement — is what turns a potential year-long contested fight into a four-to-six-month paperwork exercise. The checklist below sits one step before filing the divorce application. Work through it in this order. Skip steps and the divorce itself takes longer and costs more.

This is a sequence, not a menu. Each step depends on the one before it. The order keeps you from making expensive choices early — like hiring a lawyer for litigation before knowing whether your file actually needs one.

Step 1 — Confirm your date of separation

The single most important fact in the file. The day you and your spouse began to live separate and apart. Everything downstream runs from it — the one-year separation rule, the eligibility to file, the equalization valuation date, the support start date. Write it down. If you cannot identify it with confidence, that is the first conversation to have, even before any lawyer call.

Step 2 — Gather your financial documents

The court (and your spouse, and any paralegal you retain) will need:

• Your last three years of T4s and Notice of Assessments from CRA.
• Recent pay stubs (last 3 months).
• All bank account statements (joint and individual) showing the separation date.
• All debt statements — credit cards, lines of credit, mortgage.
• Investment and RRSP statements.
• Property valuation — appraisal or recent market estimate for the matrimonial home and any rental.
• Pension statements if applicable.
• The marriage certificate (original or certified copy).
• Birth certificates for any children under 19.

A scanned folder of these documents is what every later step depends on. Get it done in week one.

Step 3 — Settle parenting in principle

Before any paperwork, decide — even tentatively — how parenting time and decision-making will work. The schedule that fits your family, the pickup/drop-off mechanics, the holidays. See the parenting pillar for the framework. The court will look at the best interests of the child, so the parenting plan should reflect that, not what you can negotiate for yourself.

Step 4 — Run the support numbers

Child support is calculated under the Federal Child Support Tables — your income, your spouse's income, the number of children, the parenting arrangement. Spousal support, where it applies, follows the Spousal Support Advisory Guidelines (SSAG). Run both before you talk to a lawyer. Cairn's free calculator gives you a five-minute estimate that anchors the conversation in numbers, not anxiety.

Step 5 — Decide your route

Three honest options:

• Agreement, then uncontested divorce. The cheapest, fastest path. Settle parenting/support/property in writing, then file Form 8A at month 12. Cost: about $670 + $700–$1,500 paralegal.
• Joint divorce. Same as above but you and your spouse sign one application together. Cost: the same, often split.
• General application. Used when you cannot settle. Becomes a contested file by default. Cost: $7,500–$35,000 per side.

If route 1 or 2 is genuinely possible — even with hard conversations — take it. Route 3 should be the absolute last resort.

Step 6 — Get Independent Legal Advice on the agreement

Each spouse sees their own family-law lawyer or paralegal for one hour before signing the separation agreement. ILA is what makes the agreement hard to set aside later. Skipping it to save $300 is the most common mistake on otherwise clean files. The hour buys you durability.

Step 7 — File the divorce application

Once the agreement is signed, file Form 8A at the Superior Court of Justice in your region — in person, by mail, or through Family Submissions Online. By that point, the divorce is procedural. The substance has already been decided.

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