Due Diligence Guide · Law Firm

Due Diligence When Buying a Law Firm

A structured framework for evaluating client portability, malpractice exposure, bar compliance, and attorney retention before closing on a law practice acquisition.

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Acquiring a law firm requires diligence that goes well beyond standard financial review. Client relationships often walk out the door with the selling attorney, malpractice tail costs can surprise buyers, and state bar ethics rules constrain deal structures. This guide addresses the legal, financial, and operational risks specific to law firm acquisitions in the $1M–$5M revenue range.

Law Firm Due Diligence Phases

01

Phase 1: Financial and Revenue Quality Review

Assess the reliability, composition, and transferability of the firm's revenue before advancing to deeper diligence.

Client Concentration and Revenue Portability Analysiscritical

Identify whether any single client exceeds 15–20% of revenue and assess how many active matters are tied exclusively to the selling attorney's personal relationships.

Accounts Receivable Aging and WIP Valuationcritical

Review AR aging schedules for uncollectible balances and assess contingency case pipeline value using realistic settlement probability and timeline assumptions.

Owner Add-Back and EBITDA Normalizationimportant

Recast financials to separate personal expenses, excess compensation, and non-recurring items to establish true owner's discretionary earnings for valuation purposes.

02

Phase 2: Legal, Ethical, and Liability Review

Evaluate professional liability exposure, bar compliance, trust account integrity, and deal structure permissibility under applicable state rules.

Malpractice Claims History and Tail Insurance Assessmentcritical

Request a full five-year claims history from the seller's malpractice carrier and obtain a tail policy quote to understand post-closing professional liability obligations.

IOLTA Trust Account and Client Funds Reconciliationcritical

Review trust account reconciliation records and confirm no commingling violations, overdrafts, or open bar complaints related to client fund handling.

State Bar Ownership and Deal Structure Complianceimportant

Confirm the proposed ownership structure complies with state bar rules on non-attorney ownership and fee sharing, particularly if buyer is a PE platform or non-attorney investor.

03

Phase 3: Operational and People Risk Assessment

Evaluate staff retention risk, systems transferability, and the seller's ability to transition clients and relationships to the buyer.

Key Attorney and Rainmaker Retention Riskcritical

Identify which attorneys generate or control the majority of client relationships and assess employment agreements, non-solicitation clauses, and post-closing transition commitments.

Practice Management Systems and File Documentationimportant

Confirm all active matters are documented in practice management software with current statuses, deadlines, and billing records — not stored in paper files or personal email.

Office Lease, Vendor Contracts, and Digital Asset Transferabilitystandard

Review lease terms, assignment clauses, and confirm transferability of the firm's website domain, Google reviews, phone numbers, and referral partner relationships.

04

Phase 4: SBA Financing and Deal Structure Validation

Verify the Law Firm acquisition qualifies for SBA financing, the purchase price is supportable by the verified cash flow, and the deal structure protects the buyer's downside.

SBA Eligibility Confirmationcritical

Confirm the Law Firm meets SBA 7(a) eligibility requirements: the business is for-profit, U.S.-based, within SBA size standards, and the buyer meets personal financial requirements. Some industries have specific SBA restrictions — verify before LOI.

Normalized EBITDA vs. SBA Debt Service Coveragecritical

Model verified normalized EBITDA against projected SBA loan payments at current rates. A $1M SBA 7(a) loan at 10.5% over 10 years costs approximately $13,000/month. The Law Firm must generate at least 1.25x debt service coverage after a market-rate manager salary to pass underwriting.

Seller Note and Earnout Structure Reviewimportant

Confirm the seller note is properly subordinated to the SBA loan and goes on 24-month standby as required by SBA rules. If an earnout is included, define exact measurement metrics, time period, and dispute resolution process before signing the purchase agreement.

Law Firm-Specific Due Diligence Items

  • Request a full IOLTA trust account audit history and confirm no bar disciplinary proceedings are pending or unresolved against any equity partner.
  • Obtain a written client transition plan from the seller that complies with state bar ethics rules on client notification and consent to transfer of representation.
  • Evaluate the contingency case pipeline by practice area, estimating time-to-close and expected recovery rates to understand when and whether deferred revenue will materialize.
  • Assess referral network relationships — including CPA, financial advisor, and real estate broker referrals — to determine whether they are firm-level or attorney-level relationships.
  • Confirm malpractice tail insurance is budgeted in deal economics and negotiate responsibility for tail premium coverage between buyer and seller in the purchase agreement.
  • Verify that the purchase price divided by verified normalized EBITDA produces a multiple consistent with current market comparables for Law Firm transactions — overpaying by 0.5x–1.0x EBITDA is the most common buyer error in this sector.
  • Confirm the lease terms are assignable to the buyer with the landlord's written consent, and that the remaining lease term extends at least through the SBA loan term — lenders require this before funding.
  • Request copies of all material vendor contracts, supplier agreements, and service relationships — confirm which are transferable, which require novation, and which may terminate on change of ownership.

Standard Document Request List

Before signing a Letter of Intent, request these documents from the seller. Missing or incomplete items are a red flag — not a reason to proceed without them.

  • 3 years of business tax returns (Schedule C or Form 1120)
  • Last 3 years profit & loss statements (monthly detail)
  • Current balance sheet and accounts receivable aging
  • Customer/client list with revenue by account (anonymized)
  • All active contracts, subscriptions, and recurring agreements
  • Equipment list with condition and estimated replacement cost
  • Employee roster with tenure, title, and compensation
  • Any pending or threatened litigation or regulatory complaints
  • Owner compensation and discretionary expense add-backs
  • Year-to-date financials vs. prior year same period

Frequently Asked Questions

Can a non-attorney buy a law firm?

Only in states permitting alternative business structures, currently Arizona and Utah. In most states, law firm ownership is restricted to licensed attorneys, significantly limiting the buyer pool and deal structuring options.

How is a law firm typically valued for acquisition?

Most small law firms are valued at 2.5x–4.5x owner's discretionary earnings. Practice areas with recurring matter flow like estate planning and business law command higher multiples than contingency-heavy personal injury practices.

What is the biggest risk when acquiring a law firm?

Client portability is the primary risk. If the selling attorney is the sole relationship holder for most clients, revenue may not transfer to the buyer regardless of deal structure or earnout provisions.

Is SBA financing available for a law firm acquisition?

Yes, SBA 7(a) loans can finance law firm acquisitions when the buyer is a licensed attorney. Non-attorney buyers face restrictions in most states, limiting SBA eligibility due to professional ownership requirements.

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