- The single most important principle to internalize: money held in trust belongs to the client, not the lawyer or the firm.
- Because a law practice's real value is largely its client relationships and files, sellers sometimes think of a practice sale the same way they'd think of selling customer lists in an…
Selling a law practice — whether it's a sole practice, a small firm, or a defined book of files — is not the same transaction as selling a retail shop or a trades business. Alongside the usual questions of price, assets, and employees sits a set of obligations that exists nowhere else in the business-sale world: what happens to the client trust funds the practice is holding.
Every Ontario lawyer who has ever held money in trust for a client knows the Law Society of Ontario (LSO) treats trust accounting seriously. A practice sale doesn't pause those obligations — it usually intensifies them, because trust liabilities have to be identified, reconciled, and properly resolved before (or as part of) the deal closes, not quietly folded into "assets purchased."
This article walks through how trust accounting considerations typically fit into a law practice sale in Ontario, and where sellers and buyers most often get it wrong.
Trust Funds Are Not a Business Asset You Can Sell
The single most important principle to internalize: money held in trust belongs to the client, not the lawyer or the firm. It cannot be treated as part of the purchase price, folded into working capital, or transferred to a buyer as if it were inventory or accounts receivable.
This has practical consequences for deal structure:
- A purchase agreement for a law practice generally needs to address trust funds separately from the operating assets or shares being sold.
- The selling lawyer typically remains personally responsible for their trust accounting obligations up to the point those files and their associated trust funds are properly dealt with — a sale doesn't automatically discharge that responsibility.
- A buyer taking over active client files needs a clear, documented basis for any trust funds associated with those files before treating them as connected to their own practice.
What Usually Needs to Happen Before or At Closing
| Step | Why it matters |
|---|---|
| Reconcile all trust ledgers and identify funds tied to files being transferred | You can't respond to "what happens to this money" until you know exactly what's held and for whom |
| Resolve or properly disburse trust funds tied to closed or inactive matters | Old, unreconciled trust balances are a red flag the Law Society and any reviewing lawyer will want addressed |
| Obtain client consent or provide notice where a file (and any associated trust funds) is moving to a new lawyer | Clients generally have the right to choose who continues to act for them, independent of the practice sale |
| Confirm how ongoing trust obligations on transferred files will be handled going forward | The buyer needs to know they're stepping into current, accurate trust records — not inheriting an unreconciled mess |
| Document the trust-related terms in the purchase agreement | A handshake on "we'll sort out trust stuff after" is not a substitute for clear written terms |
Client Files Are Not Simply "Sold" Either
Because a law practice's real value is largely its client relationships and files, sellers sometimes think of a practice sale the same way they'd think of selling customer lists in an ordinary business deal. Client files require more care:
- Clients generally have to be given notice of the transition and the opportunity to choose whether they want their file to move to the buyer, go to another lawyer of their choosing, or be returned to them.
- Confidentiality obligations to clients continue regardless of who now owns the practice — a purchase agreement can't override a lawyer's professional obligations to a client.
- Conflicts of interest need to be checked before the buyer takes on the seller's client files, the same as with any new client intake.
Common Misconceptions
- "The buyer's purchase price includes whatever is sitting in trust." No — trust funds are client money and are never part of what a buyer is purchasing, regardless of how the deal is priced.
- "Once I sell, trust accounting is the buyer's problem." A selling lawyer generally can't simply hand off unresolved trust obligations; those need to be properly wound up as part of the transition, and the seller can remain accountable for the state of their own trust records up to that point.
- "This only matters for firms with a lot of real estate or estate files." Any lawyer who has held client money in trust — even occasionally — has trust obligations to address on a sale, not just practices that are heavy in trust-intensive work.
Frequently asked questions
Can I just transfer my trust account balance to the buyer's trust account?
Not without properly accounting for whose money it is and why it's being held. Each client's trust funds need to be tracked to that client's file, and any movement of funds needs a proper basis — it isn't a simple bulk transfer between two firms' trust accounts.
Do clients have to agree before their file moves to the buyer?
Clients generally have the right to decide who acts for them going forward; a practice sale doesn't automatically bind them to the buyer. Notice and, where appropriate, consent are typically part of a properly handled transition.
What if I find old, unreconciled trust balances while preparing to sell?
This is common enough that it's worth building time into your sale timeline to reconcile trust ledgers before you go to market. Unresolved trust discrepancies are the kind of issue that can delay or derail a deal if discovered late.
Does the Law Society need to be told about the sale?
Requirements can depend on the specifics of the transition and your practice structure. Given how seriously trust accounting compliance is treated, confirm your specific notification and reporting obligations directly with a lawyer familiar with Law Society requirements before you finalize a sale.
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