Disclosure: DROZlegal publishes this guide and builds the billing, matter-profitability, and AR-automation tools described below. Third-party statistics are sourced directly from Clio, the Law Society of Ontario, and the Canada Revenue Agency, cited where used.
What "AI billing and AR automation" actually means here
The phrase gets used loosely across the legal-tech market. On DROZlegal's platform, it maps to three distinct pieces of the billing lifecycle: generating the invoice itself, tracking whether a matter is actually profitable once time is counted against it, and following up on accounts that go overdue. None of the three move money.
This is not trust accounting. Trust money — retainers, settlement funds, real-estate deposits — lives in a separate, compute-only system governed by LSO By-Law 9, with its own three-way reconciliation and its own hard rule that no AI ever touches a trust transfer. This post is about general billing: the fee invoice a firm sends for work performed, and the AR process of getting that invoice paid. If you're here for trust bookkeeping specifically, that guide is the right one to read instead.
It's also not payment processing. Generating an invoice and collecting the payment on it are two different systems on any real platform, DROZlegal's included. A client-payment-collection feature has been built and has been through adversarial security review here, but it's switched off in production while the company finalizes a payment-processor agreement — worth checking for on any vendor's roadmap page, since "billing software" marketing sometimes implies payment collection is live when it isn't.
Where general billing and AR quietly leak margin
Most of the money a firm loses on billing never shows up as one dramatic write-off. It leaks out in small, repeatable failure points:
| Failure point | What it actually costs |
|---|---|
| Delayed invoicing | Work sits unbilled for weeks; by the time an invoice goes out, the client has mentally moved past the matter. |
| No per-matter profitability visibility | A firm can be busy and still losing money on a specific matter type without anyone noticing until year-end. |
| Inconsistent AR follow-up | The partner who should be practising law instead keeps a mental list of who owes what — and it slips. |
| Fee and disbursement lines blurred on the statement | A statement of account that doesn't separate fees from disbursements clearly isn't just sloppy formatting — it's a Rule 3.6-3 problem. |
Realization and collection benchmarks: Clio's 2025 Legal Trends Report puts the industry-average realization rate at 88% and average collection rate at 93% — meaning roughly 12% of billable work never gets invoiced, and roughly 7% of what does get invoiced never gets paid.
Invoice generation: what's live, and the one gap to know about
Generating the invoice itself is live today. The system pulls billable time and fee arrangements into a draft invoice, applies Rule 3.6-3's requirement that fees and disbursements be detailed clearly and separately on the statement of account, and calculates HST the way the CRA actually requires: based on whether the underlying charge is a taxable fee or a disbursement passed through as the client's agent, not a flat percentage applied to the total.
The gap: disbursements aren't live in production yet. As of this writing, disbursement tracking sits behind a feature flag that isn't enabled in the production environment. The disbursements API returns an error rather than data, and disbursement line items are excluded from the billing run — meaning today's invoices cover fees, not disbursements. A vendor that doesn't disclose which billing components are actually shipped versus still in development is asking a firm to find that out the hard way; we'd rather a firm know before it evaluates the product, not after.
Fee/disbursement separation: LSO Rules of Professional Conduct, r.3.6-3, requiring fees and disbursements to be clearly and separately detailed on a statement of account. HST treatment of fees vs. disbursements: CRA GST/HST Policy Statement P-209R, "Lawyers' disbursements" — what matters is the tax status of the fee itself and whether the disbursement was incurred as the client's agent, not the tax charged on the underlying expense.
Matter profitability: seeing which work actually pays
Time entries and invoices tell a firm what it billed. They don't tell a firm what a given matter actually cost to run, or whether a certain matter type is quietly subsidized by the rest of the practice. Per-matter profitability tracking pulls those numbers together — time invested against fees billed and fees collected — into a view a managing partner can act on before the year-end financials do it for them.
This is a visibility tool, not a pricing algorithm. It doesn't set rates or recommend which clients to fire. It surfaces the numbers a partner would otherwise have to reconstruct manually from three different reports, on a matter-by-matter basis instead of only at the firm level.