Too Dependent on One Customer
in Law Firms

The short answer

A client that accounts for a large share of fees is only a problem to the extent that the firm could be replaced at the next matter, which turns on how far the equity partners' knowledge is embedded in the client's files rather than on the share of the £24.8 m. The version of this question that applies to law firms is not the generic one. 19 of 28 equity partners aged 55 or over with no formal lateral hire programme or associate-to-partner track for eight years — so an answer that ignores 82 % realisation will be confidently wrong. The analysis has to start from 68 % utilisation and £184 k profit per equity partner rather than from revenue.

A client that requires only a change of instruction is an exposure. A client whose matters would require other equity partners to rebuild relationships and re-learn the facts is a stronger position that happens to look concentrated on the revenue line.

The trap is that the same client usually drives lower realisation because it negotiates harder, pulls fee earners into more administrative work that lowers utilisation, and stretches payment terms that increase lock-up days, so the risk and the pressure on profit per equity partner arrive together. Growing other practice groups to dilute the share is slow; the faster lever is usually adjusting the terms on the existing client to reflect the risk carried by the equity partners.

It is also worth separating the share of gross revenue from the share of contribution to profit per equity partner. They can move in opposite directions, and only the second would actually reduce what the equity partners take home.

How to tell this is actually your problem

These three together are the signature. One on its own usually points somewhere else.

✓ One client drives a quarter or more of billable time across fee earners in one or more practice groups.
✓ That client has lower realisation or longer lock-up days than the rest of the book.
✓ Losing the client would force an immediate reduction in headcount or drawings rather than a reallocation of matters among existing equity partners.

The move that usually makes it worse. Trying to grow the other four practice groups to dilute the percentage, which adds cost and lock-up while leaving the terms with the dominant client unchanged.

Who this is for — and who it is not

It is for you if you run or finance a law firm and one customer exceeds a quarter of revenue. It is the situation where the numbers are available but nobody has put them in an order that produces a decision.

It is not for you if Percision is the wrong tool if you already know the answer and only need execution capacity, or if the business is pre-revenue — then the constraint is evidence about the market, not analysis of your own figures. Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library. Also wrong if you need facilitation, politics, or someone to sit with a lender or buyer. Those are human jobs.

Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library.

What this looks like when the analysis is actually run

Below is an excerpt from a real run of this analysis on a law firm. It is a sample profile rather than a customer, and it is unedited engine output — this is the format you get, on your own numbers.

The subject is Ashgrove Legal LLP, a sample company profile used for testing rather than a customer — £24.8 m gross revenue from five practice groups.

This is one move out of a full analysis. Read a complete report — every page, no email required.

What the engine does with this question

This question routes to Proprietary EFF Methodology, one of 29 engagements the platform runs. For law firms it works through 82 % realisation, 68 % utilisation, £184 k profit per equity partner and 112 lock-up days, then produces the sequence rather than a list of options — which move first, what it funds, and the observation that would say the sequence is wrong.

You watch the analysis get built before paying anything. Read a complete report here if you would rather see the depth first.

Questions people ask about this

What level of customer concentration is dangerous?

There is no threshold that means much on its own. What matters is how quickly they could replace you and what happens to your fixed costs if they do. Both are answerable.

Should I turn away business from a large customer?

Rarely on concentration grounds alone, and often on margin grounds. If the largest account is also the worst-priced, the concentration problem and the margin problem have the same fix.

How do I reduce dependency without losing the account?

Increase what it would cost them to leave, and reprice the exposure. Growing a second segment is the right long answer and does not help within the notice period you actually have.

Is this different in law firms than in other industries?

Materially, yes. 19 of 28 equity partners aged 55 or over with no formal lateral hire programme or associate-to-partner track for eight years — which changes both the diagnosis and the order of the fixes. The metrics that decide it here are 82 % realisation, 68 % utilisation, £184 k profit per equity partner, and an answer built on industry-general benchmarks will usually point at the wrong one first.

What data do I need before this analysis is worth running for a law firm?

Less than most people expect. Your last twelve months of revenue and cost split the way you already split it, plus whatever you hold on 82 % realisation and 68 % utilisation. The analysis is explicit about what it is assuming where your data stops, which is more useful than waiting for numbers you may never have.

When is Percision the wrong tool?

Percision is the wrong tool if you already know the answer and only need execution capacity, or if the business is pre-revenue — then the constraint is evidence about the market, not analysis of your own figures. Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library. Also wrong if you need facilitation, politics, or someone to sit with a lender or buyer. Those are human jobs.

Does Percision replace a lawyer, tax advisor, auditor, or AI implementation team?

Percision is not a lawyer, tax advisor, auditor, licensed appraiser, clinical or regulatory filer, or an AI implementation shop. It does not do HR casework, creative-only brand work, or impersonate a named consulting firm. It is a strategy analysis engine — not a template library.