A client-retention adjustment can align part of an accounting-practice purchase price with the fees that actually continue after completion. It does not remove retention risk. Unless the opening client pool, measurement rules and conduct expectations are precise and operationally workable, the mechanism may simply move disagreement from due diligence to the post-sale period.

Buyers should first establish a verified client-and-fee baseline, then model the adjustment independently of the headline price. The sale agreement belongs with the parties’ lawyers. The buyer’s commercial task is to make sure the proposed rules reflect how the practice bills, collects fees, groups clients and delivers work—and that the result can be reproduced from agreed records.

Start with the commercial purpose

Ask what uncertainty the adjustment is meant to address. Is it protecting against clients who decline the transition, non-recurring work, a seller-dependent relationship base, or all three? A revenue-only mechanism may not respond sensibly to scope reductions, price increases or changes in service mix.

CPA Australia’s practice-sale checklist describes retention or claw-back provisions as one way of making part of consideration conditional on maintaining agreed fees over a period. It also treats the arrangement as a matter for contract negotiation (CPA Australia). That is a useful concept, not a substitute for a transaction-specific calculation or legal advice.

Separate three decisions:

  • the value attributed to the practice on available evidence;
  • how much consideration is paid at completion, deferred or held back; and
  • how a later client outcome changes the amount ultimately payable.

A retention adjustment should not make an unsupported price reasonable. Government guidance recommends reviewing financial records, operations and legal documents before signing, including independently checking three to five years of financial information (business.gov.au).

Fix the opening baseline before completion

The baseline should be a dated schedule, not merely “annual fees”. Give each client group a stable identifier and record its entities, services, billing basis, responsible partner, historic fees, credits and collection status. Reconcile it to job records, invoices, the general ledger and cash receipts.

Agree which amount is measured: invoiced fees, fees earned under a consistent work-in-progress policy, or cash collected. Each can produce a different result. GST, disbursements, interest, bad-debt recoveries and pass-through charges should not be left implicit.

Also identify what the baseline excludes, such as:

  • one-off projects, dormant clients and work already known to be ending;
  • fees generated by services or licences the buyer will not acquire;
  • exceptional catch-up work, recoveries or seller-related entities;
  • work referred out rather than performed by the acquired practice; and
  • unbilled or disputed amounts that have not been supported.

The parties’ advisers should decide the contractual consequences. The buyer should retain the source data and a baseline-to-ledger reconciliation so the opening figure can later be audited.

Define retention and the measurement window

A name remaining in practice software is weak evidence of retention. Define the operational milestones that matter: the client received the transition communication, accepted or entered the required engagement, supplied records, received the relevant service, was invoiced on the agreed basis and paid.

APES 305 requires members in public practice to document and communicate engagement terms and includes guidance for recurring engagements (APESB). Accordingly, the buyer should test whether the measurement rules distinguish a genuinely continued engagement from an untouched database record.

Choose a window that captures the normal service cycle. A twelve-month test may cover an annual compliance cycle but still misstate a client with irregular advisory work, a late lodgement or an eighteen-month project. Define the start and end dates, cut-off treatment and whether later collections of in-window invoices count. Consider separate cohorts where monthly bookkeeping, annual tax work and project-based advisory services behave differently.

Make like-for-like fee rules explicit

The calculation should distinguish retention from buyer-created growth and from seller-era revenue that does not continue. Work through these questions with financial and legal advisers:

  • Are price rises measured at old rates, new rates or actual invoiced amounts?
  • Does additional work for an existing client count, and is there a cap?
  • Does a smaller replacement service count as full, partial or no retention?
  • Are new clients referred by an acquired client included?
  • How are credits, write-offs, refunds and bad debts treated?
  • What happens when work shifts between entities in the same client group?
  • Are fees lost because the buyer lacks capacity, registration or capability treated differently?

Group rules matter. One family may control several companies, trusts and individuals, while one consolidated invoice may cover multiple engagements. Decide whether the unit is each legal entity, a related group, a service line or an agreed combination. Apply the same grouping to the baseline and the outcome.

Hypothetical example: an acquired group historically paid $24,000: $15,000 for recurring compliance, $6,000 for bookkeeping and $3,000 for a completed restructuring project. During the test period, compliance continues at $16,000 after a price increase, bookkeeping ends and a new $5,000 project begins. Depending on the agreed rules, reported retained fees could range from $15,000 to $21,000. The example shows why definitions matter; it is not a recommended formula or benchmark.

Address exclusions and both parties’ conduct

Build a clear process for deaths, client business sales, insolvency, mergers and voluntary closures. Also address losses associated with either party’s conduct, fee increases, service failures, staff departures, relocation, technology changes or conflicts.

Seller obligations might cover introductions, agreed meetings, file explanations and non-solicitation; buyer obligations might address service continuity, staffing, communication and reasonable acceptance of work. Lawyers should determine whether and how these become enforceable. They should be capable of evidence without requiring either party to control a client’s decision.

Client data access also needs care. The OAIC says that where the Privacy Act applies, vendors should generally avoid providing customer names and identifiers during due diligence, consider de-identification and use controlled access; prospective purchasers must also protect privacy rights (OAIC). Design baseline verification, reporting and dispute access with privacy and confidentiality advice rather than circulating unrestricted client-level files.

Make reporting and payment mechanics testable

Before signing, run a mock calculation using historic data. Specify who prepares reports, their frequency, the accounting system fields used and the time allowed for review. A useful report bridges opening baseline fees to retained fees, with separate columns for loss, scope change, pricing, additional work, credits and collections.

Ask advisers to examine:

  • whether the adjustment is one-way or can increase as well as decrease;
  • any cap, floor, tolerance or client-level limit;
  • whether funds are deferred, held under an agreed arrangement or paid then potentially recovered;
  • access to records and personnel after completion;
  • correction of errors discovered after a report;
  • tax, GST and accounting treatment of changing consideration; and
  • what happens if the buyer resells, merges systems or changes the practice during the window.

The safest operational design is not necessarily the most complicated. It is the one both parties can calculate from preserved evidence without repeatedly exercising subjective judgement.

Plan a dispute path before one exists

Define a staged process: exchange the calculation and supporting schedule, allow a specified review period, require senior representatives to meet, and identify the questions that may go to an independent accountant or another expert. Lawyers should draft the appointment, scope, information rights, cost allocation, finality and interaction with broader dispute rights.

Keep an issue register during the measurement period. Record departures, reasons, supporting communications, disputed classifications and corrections as they arise.

Questions for the buyer’s advisers

  • Does the baseline reconcile to evidence and remove non-maintainable fees?
  • Can the calculation be performed consistently for every client group?
  • Are privacy, confidentiality and professional obligations respected?
  • Do seller and buyer conduct rules allocate controllable risks coherently?
  • Is the holdback or deferred amount proportionate to the uncertainty being tested?
  • Are reporting, access, expert determination and payment timing workable?
  • Have the tax, GST, accounting, financing and legal effects been assessed together?

Sources

Disclaimer

This article provides general information only. It does not constitute legal, tax, accounting, financial, credit, valuation or other professional advice. Circumstances differ. Obtain advice from appropriately qualified advisers before acting or entering a transaction.