The deal is signed. Now two firms have to work as one.

Law firm merger integration is where a deal succeeds or stalls. We bring your systems, data and people together: practice management, conflicts, trust, billing and documents, so your clients feel the change as an upgrade, not a disruption, and your firm gets the most out of it.

Why is law firm merger integration harder than the deal?

Partners agree on the vision. Then Monday comes, and your team asks the questions nobody had time for:

• Which system are we keeping, and what happens to everything in the other one?
• Can we run a conflict check across both firms’ clients on day one?
• Whose rates, whose invoice template, whose way of opening a file?
• Do our trust balances still match after we combine accounts?

Most of the post-merger technology work lands on the practice management system, because it touches nearly everyone and everything in your firm (ABA Law Technology Today). Get that right, and the rest of the integration has something solid to stand on.

More firms are combining. Most aren’t giant ones.

In the US, Fairfax Associates tracked 59 completed law firm mergers in 2025, up 18% from 50 in 2024, and 76% of them involved at least one firm with 5 to 20 lawyers (Fairfax Associates, 2026). Canadian firms are combining too, from regional mergers to boutique acquisitions. Big-firm deals come with big-firm integration teams. Mid-size firms usually have a managing partner, an office manager and a deadline.

Not a merger? These moves need the same care.

Buying a practice or taking over from a retiring lawyer. The files, the clients and the trust ledger are moving to you, and often an aging system with them. We help you take over the practice and modernize it at the same time, without losing the history your clients rely on. Read: Taking over a retiring lawyer’s practice

Leaving a firm to start your own. You’re building a firm from scratch while clients follow you over. We help you choose and set up your systems, and get your intake, billing and trust workflows ready before the first file arrives. Which files and clients can move, and how they’re told, is a professional responsibility question for you and your law society or state Bar Association. We handle the operational side. Read: Leaving a law firm to start your own practice

Notary offices in BC. BC notaries are a separate profession from lawyers, with their own regulator and scope of practice. Combining notary offices, or a notary and a law practice, still means merging files, trust, billing and teams, and we work to your profession’s rules. Read: When a notary practice changes hands

Before you sign: an operational due diligence audit

Find the operational surprises while you can still plan around them. Building on our Law Firm Technology Audit, we review how the other firm (or both firms) actually runs, and report on:

1. Practice management and accounting systems. Which platforms, versions and contracts, and what data can actually be exported.
2. Trust processes. How trust is handled day to day: who reconciles, how often, which system it lives in, and what it’ll take to combine the workflows.
3. Conflicts and intake. How clean and complete each firm’s conflicts data is, and what it’ll take to search across both.
4. Billing workflows. How time is recorded, how invoices get made and approved, and where the two firms do it differently.
5. Documents and email. Where files live, how they’re organized, and what has to move.
6. Licences and subscriptions. Overlapping software, renewal dates and early-termination terms.
7. AI and security. Which AI tools each team uses, approved or not, and whether policies line up. See AI for Law Firms

You get a clear integration effort estimate, a risk list, and a recommendation on which systems to keep.

Our review is operational, not financial. We’re not accountants, and we don’t audit financial statements, verify balances, value a practice or give tax or legal advice. Your accountant and legal advisors handle that side of due diligence, and we’re happy to work alongside them.

During due diligence we follow your conflicts lawyer’s direction on what information can be shared and when.

What we bring together

Practice management systems. Clio, Actionstep, LEAP, PCLaw and others. We help you choose the platform that goes forward (or a fresh start for both firms), then plan the move. Clio migration · Actionstep implementation

Data migration oversight. Contacts, matters, balances and documents mapped, de-duplicated and test-imported, with matter numbering that makes sense for the combined firm.

Conflicts database merging. Both firms’ client, matter and party data cleaned and combined so your conflict checks see everything.

Trust and opening balances. We work alongside your controller, bookkeeper or accountant to make sure opening trust and A/R balances carry over cleanly and tie out, to your provincial law society’s rules in Canada or your state Bar Association’s IOLTA rules in the US.

Billing and rate harmonization. One rate structure, one set of invoice templates, one billing workflow, without surprising your clients.

Document management. One structure, one naming convention, one place to find the file.

Workflows. File opening, intake, matter templates and approvals rebuilt as one way of working, not two.

Two cultures, one way of working

Technology is the visible part of a merger. Habits are the hard part. One team dockets daily; the other at month-end. One firm runs on templates; the other on memory. If you just pick a system and flip the switch, people quietly keep doing it their old way.

Change management. A rollout plan built around your people from both firms, with clear owners and timing.

Your liaison with the vendors. We’re the go-between for your firm and each software provider’s team, so nobody is stuck translating between legal workflows and software settings.

Customization. Your combined firm’s practice areas, matter stages, fields and templates set up to match how you’ve agreed to work.

Tailored training. Role-based sessions for lawyers, assistants and accounting, with extra support for whichever team is learning a new system.

6 steps from letter of intent to one firm

1. Confidential discovery call. Your deal timeline, your systems, your biggest worries.
2. Operational due diligence audit. Systems, data and workflows reviewed before you commit.
3. Integration plan. Which systems stay, what moves, what day one looks like, and what can wait.
4. Data clean-up and test migration. Conflicts, matters, trust and billing data checked in a trial run before cutover.
5. Cutover. Ideally at a reconciled month-end, with your accountant or controller signing off on opening balances.
6. Training, go-live and support. At least two weeks of hands-on support after go-live, and often longer. Many firms keep us on for ongoing support as the combined firm settles in.

Firms we’ve helped through big transitions

Taking over a retiring lawyer’s practice, and modernizing it. A lawyer was taking over a long-established practice from a retiring lawyer. The practice ran on PCLaw, with invoices typed up by hand in Word. We moved the team to Actionstep Legal Financial Management (formerly Soluno) on the go-live date we set at kickoff. We ran a trial conversion first, and no data conversion issues were flagged at go-live. We set up their invoice and cheque templates, ran role-based training, and stayed on afterward to train new staff and support a bookkeeping handover. The lawyer who took over the practice told us they “couldn’t have done this without Chops.” Read the full story

A notary practice becomes a lawyers-and-notaries firm. A retiring notary sold his practice to a lawyer, and the office relaunched as a combined lawyers-and-notaries law corporation. Working alongside the buyer’s accounting advisor, we assessed how the office actually ran, then got every procedure out of the owner’s head and onto paper before he stepped away. The result was a company handbook and operations manual rewritten around a managing lawyer, plus a training checklist for whoever steps into that role. Read the full story

A group of lawyers leaves to launch their own firm. A group of partners and associates, with their support staff, left their firm to start their own, and called us on short notice. We mapped which data moved from the old firm’s PCLaw: only the departing lawyers’ contacts, open matters, work in progress and trust balances (into the new firm’s trust accounts). We ran a blackout plan so nobody lost time entries during the switch, and took them live on Actionstep Legal Financial Management (then Soluno) before the new firm’s launch date. Then we trained the team and their bookkeeper, and delivered a detailed process manual. Read the full story

Why firms bring us into a merger

• Multi-platform experience. Certified on Clio, LEAP and Actionstep Legal Financial Management (formerly Soluno), and an Actionstep partner, so we can help with any combination of systems.
• Over 70 law firms across Canada and the US. We know how law firms really run, not just how software is configured.
• We don’t stop at the plan. We oversee the migration, configure, train, and stay on after go-live.
• Everywhere you are. We work with law firms in every province and territory across Canada and throughout the United States, including cross-border combinations.

FAQ

Related: Law Firm Technology Audit · Clio Migration · Actionstep Implementation · AI for Law Firms