Why clients hold more power than they realize

2. A switchable mandate. The work is not locked in by history, relationships, or regulatory constraint. It can genuinely move.

3. Repeat volume as a carrot. "This is the first of several matters this year." Firms discount today to secure the pipelinepipelineAll active sales opportunities across the stages of the sales process, together with their combined potential value and probability of closing.Voir la définition complète →.

Remove any one lever and power leaks back to the firm. A GC who cannot actually switch (because only one firm has the sector expertise) has credible alternatives on paper only.

Concentrated buyers versus fragmented buyers

This is the core of the module: how buyer structure changes the balance of power.

Compare two clients.

Client A: a global bank's legal department. It spends heavily every year, runs formal panels every two to three years, and employs procurement professionals whose job is to squeeze rates. It can move an entire category of work (say, employment litigation) from one firm to another with a memo. This is a concentrated buyer.

Client B: a family-owned manufacturer that hires a lawyer once every four years, when something goes wrong. No procurement, no panel, no memory of last time's rate, and a strong preference for the person who helped before. This is a fragmented buyer.

Client A pays materially lower effective rates than Client B for the same partner's hour. Not because Client A is a better negotiator in the moment, but because its structure makes switching cheap and repeatable.

The lesson: fee pressure is a function of buyer concentration and switching cost, not of how tough the individual in the room is.

Where this shows up across professional services

• Big Four audit and advisory (Deloitte, PwC, EY, KPMG). Large listed companies rotate auditors under mandatory rotation rules (in the EU, the Audit Regulation of 2014 requires rotation, typically every 10 years with conditions). Rotation is forced switching, and it hands buyers leverage they did not have to create themselves.
• Management consulting (McKinsey, BCG, Bain). A corporate with a strong internal strategy team and a preferred-supplier panel pays far less per day than a first-time buyer dazzled by the brand.
• Investment banking (Goldman Sachs, Morgan Stanley, JPMorgan). Here the balance tilts back toward the seller for the marquee deal, because league-table credibility and relationship history are genuinely scarce. The buyer's leverage is weaker when the alternatives are not interchangeable.

That last point matters. Buyer power is not automatic. It depends on how substitutable the firms are.

Why firms fight back with de-commoditization

Firms are not passive. Their strategic response to buyer power is to make themselves un-switchable.

They do this by moving work up the value chain: from commodity tasks (document review, standard due diligence, routine audit testing) toward bespoke judgment (bet-the-company litigation, contentious cross-border deals, regulatory strategy). Commodity work is where buyer power is strongest and margins thinnest. Bespoke judgment is where the client cannot credibly say "I have three of you."

You can see the fault line clearly:

• Commoditized, high buyer power: high-volume contract review, standard tax compliance, basic bookkeeping. This work is increasingly automated or offshored. Fees fall.
• Bespoke, low buyer power: the novel regulatory question, the reputation-defining crisis, the deal no one has structured before. Fees hold.

Generative AI is accelerating this split. Routine drafting and research, historically billed by the hour, are collapsing in cost. That squeezes the bottom of the pyramid and pushes firm value toward the scarce senior judgment at the top. A useful primer on how competitive forces distribute margin is Michael Porter's Five Forces framework, well summarized here by the Harvard Business School reading list overview.

A simple worked example of the squeeze

Let's make the fee squeeze concrete. These are illustrative numbers to show the mechanics, not market benchmarks.

A firm's standard blended rate (average across the team) for a matter is estimated at $800 per hour. The matter is scoped at 500 hours.

• List price: 500 x $800 = $400,000.

Now the client runs a three-firm parade and asks for a 15% panel discount plus a fee cap on the first phase.

• Discounted rate: $800 x 0.85 = $680 per hour.
• New fee: 500 x $680 = $340,000.

The client just extracted $60,000, or 15%, without doing anything except making switching credible. If the firm's marginal cost of that team's time is well below $680 (because the associates are salaried and would otherwise be under-utilized), the firm still takes the work. It would rather earn a thinner margin than earn nothing. That asymmetry is why the buyer wins.

Multiply this across an annual mandate of, say, ten such matters and the concentrated buyer has moved $600,000 of value from the firm's margin to its own budget.

The players and the power mapmapUsing software to automate repetitive marketing tasks and campaigns, enabling personalisation at scale across channels like email, web, and social.Voir la définition complète →

Pulling the module's players together:

• Incumbents: established firms with the relationships and the brand. Their moatmoatA lasting edge over competitors: a resource, capability or position they cannot easily replicate, letting a firm earn above-average returns over time.Voir la définition complète → is trust and switching cost, not price.
• Challengers: hungry firms and alternative legal / advisory providers (including the Big Four pushing into legal services, and legal-tech-enabled boutiques). They compete by lowering the client's switching cost, which increases buyer power across the market.
• Suppliers: the talent. Senior partners are the scarce input, and star partners have their own bargaining power (they can lift out to a rival and take clients with them). This internal power struggle shapes what firms can afford to discount.
• Buyers: GCs, CFOs, and procurement functions. Their power rises with concentration, sophistication, and switchability.
• Regulators: bodies like the SEC and PCAOB in the US, and the EU's audit rules, that force rotation or restrict conflicts, sometimes manufacturing switching where the market would not.

The margin flows to whichever node is scarcest. When judgment is scarce, the partner wins. When firms are interchangeable, the buyer wins.

What a smart buyer does deliberately

The GC in our opening scene did three things worth copying:

1. She engineered credible alternatives before she needed them, keeping a live panel rather than a single relationship.

2. She made the mandate switchable by documenting the matter clearly, so any firm could pick it up. Documentation destroys lock-in.

3. She signaled repeat volume to convert one negotiation into a standing rate.

Most buyers do none of this. They default to the incumbent, hand over power for free, then complain about fees.

Key Takeaways

• Buyer power in professional services comes from structure, not attitude. Concentration, low switching cost, and repeat volume beat tough talk every time.
• The beauty parade works because firms sell perishable capacity. An idle senior hour is lost margin, so a credible threat of switching drops the firm's reservation price fast.
• Fragmented buyers overpay for identical work. Build a panel, document mandates, and make switching visible to claw that value back.
• Firms defend margin by de-commoditizing. They flee price-sensitive routine work toward scarce judgment where the buyer has no credible alternative, a trend AI is sharpening.
• Margin flows to the scarcest node in the chain. Know whether the scarce thing in your deal is the firm's judgment or your own switchability, and you know who holds the power.