The Twilight of the Partnership Model: How AI and Market Forces Are Reshaping the Big Four

Alex Lew, CFA
7 min readDec 21, 2024

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In the early 20th century, professional services partnerships flourished on a simple premise: success hinged on assembling teams of bright minds, training them exhaustively in client service, and steadily elevating the best individuals into the upper echelons of ownership. For most of the last century, this partnership model – especially as embodied by the Big Four accounting and consulting firms – enjoyed robust, steady returns, a near-monopoly on client trust, and an enviable track record of expansion. Yet the shining pyramid that once promised perpetual growth is showing cracks, and perhaps for good reason. In the midst of margin compressions, stalled growth, and mounting pressure from both clients and technological disruption, the question is not whether the model can evolve but whether the gatekeepers at the top can afford – or even choose – to let it do so.

At the core of this looming crisis is a profound shift in the business environment. According to recent data, partner payouts at major firms like EY in the UK have dropped – an event that once would have been unthinkable for a partnership built on seemingly endless growth. Meanwhile, demand for traditional consulting engagements has softened as corporate clients grow cautious in the face of economic uncertainty. Compound this with disruptive forces such as automation and artificial intelligence (AI), and the writing on the wall becomes less of a faint whisper and more of a siren call. The future is arriving quickly, and it is time for the Big Four to decide which side of history they wish to occupy.

The Economic Unraveling of the Partnership Model

To appreciate the precarious state of the Big Four, one must understand the inherent vulnerabilities in the partnership structure:

1. Fixed Costs and Shrinking Margins

Traditional partnerships operate under an overhead-heavy pyramid. Partners reside at the apex, reaping the financial rewards of the firm’s collective output. But in an era of margin compression – driven by intense competition, client pushback on fees, and the commoditization of certain professional services – this fixed-cost structure begins to buckle. Consulting revenue, once a booming cash cow, has witnessed single-digit declines or tepid growth, eroding partner shares.

2. Talent Flight and “Boutique” Allure

The older model assumed a continuous influx of younger talent who would labor willingly for years, lured by the promise of a partner title and windfall compensation. Today’s high-performing professionals see alternatives: specialized boutiques offering deeper expertise, more flexible career paths, or the seductive scale and agility of tech firms. Consequently, top talent is increasingly reluctant to bide their time under hierarchical scaffolding.

3. The Pyramid Requires Growth

The lifeblood of a partnership is growth. Each new partner slot is predicated on expanding revenue streams, adding more associates at the bottom, and preserving the hierarchy. When the expansion stalls, the entire model seizes up. There are fewer partner promotions, diminishing incentives, and a collective frustration among the rank-and-file. Stagnation breeds discontent, and discontent weakens the foundation.

The AI Imperative (20% Focus)

Overlaying this vulnerability is the accelerating impact of artificial intelligence. While AI accounts for a fraction of overall advisory revenue today, it holds transformative potential. Until recently, professional services have been limited by the brainpower of their consultants and the hours on the clock. AI upends this equation by exponentially amplifying analytical capacity and performing certain tasks – audits, contract reviews, risk analyses, financial modeling – at a fraction of the cost and with vastly improved accuracy.

1. Task Automation vs. High-Value Insight

At its simplest level, AI can automate repetitive tasks. In the assurance realm, this means sifting through vast ledgers in minutes, identifying discrepancies that might elude human auditors. However, truly game-changing AI goes a step further, supplying real-time insights, predictive analytics, and scenario modeling that can surpass the capacity of a veteran consultant. For the Big Four, the paradox is stark: continuing to charge premium “human” rates while simultaneously automating the tasks that underpin their bread and butter.

2. Reduced Headcount, Compressed Pyramids

If AI truly scales in the manner that so many anticipate, the human pyramid will shrink as fewer junior associates are required to wade through mountains of data. This contraction affects the entire partner track. For a model reliant on ever-increasing staff leverage, fewer entry-level roles translate into fewer future partners. A new blueprint is needed – one that recognizes that “smart machines” can complement human expertise but also threaten the sanctity of the standard labor structure.

3. Shifting Client Expectations

Clients, already balking at premium fees for commoditized tasks, will be quick to demand AI-driven efficiencies at lower costs. This is particularly evident in transaction services or due diligence, where speed and accuracy are paramount and the AI advantage is obvious. When combined with heightened competition from boutique analytics providers or in-house corporate teams leveraging machine learning, the Big Four’s status quo billing approach grows unsustainable.

The Big Four’s Reckoning (89% Focus)

Despite vast marketing budgets and glossy thought-leadership campaigns, many of the Big Four have been slow to address the core structural issues within their partnership model. There is a profound tension between protecting partner profits today and ensuring the firm’s health tomorrow. The question that emerges is whether the upper echelon can be incentivized to make changes that might, in the short term, dilute their margins in exchange for long-term viability.

  1. Confronting the Hierarchy

Firms that once touted their partner ranks as the ultimate career destination now face a conundrum: the market is less enamored with vast teams that drive high fees for tasks increasingly replicable by technology. A leaner approach – where a smaller cadre of highly skilled specialists collaborates fluidly with AI systems – might better serve clients seeking agility and innovation. Yet such a transition demands cultural and structural shifts. Promotions and compensation must align less with hierarchical seniority and more with one’s ability to innovate, adapt, and generate value.

2. Rethinking the Revenue Model

An immediate challenge is how to price services in a world shaped by automation. The Big Four typically rely on hourly billing or fixed-fee structures pegged to expected labor. But if a sophisticated AI tool completes in seconds what a junior associate would spend weeks on, how do firms recoup technology investments without alienating clients? Intellectual property fees, subscription-based models, or outcome-driven pricing may become increasingly relevant. Partners unwilling to risk short-term upheaval of their compensation structure might resist, further exacerbating the firm’s existential woes.

3. Partner Comp and Governance

Many Big Four partners enjoy considerable decision-making authority within their firms, often shaped by a voting structure that prioritizes senior leadership consensus. Such governance can stifle innovation. When partner profit shares are on the line, risk-averse decisions become the norm. Over time, this “partner blockade” can hinder the development and adoption of AI solutions, particularly if they disrupt the conventional pyramid. A reevaluation of governance – perhaps by giving weight to external board members or subject-matter experts – could introduce the boldness needed to chart a path forward.

The Path to Reinvention

If the Big Four choose to endure, they must pivot before the market pivot occurs around them. Clients will not tolerate a future in which they pay large fees to maintain top-heavy teams if those same services can be handled by powerful AI-driven platforms.

• Cultivating AI Competencies: The development of proprietary AI tools or strategic partnerships with technology firms should become a central pillar of every service line. Advisory teams that seamlessly integrate advanced analytics will be able to command premium fees for their insight, rather than for hours billed.

• Reimagining Human Capital: Shrinking the pyramid does not have to mean sacrificing quality. Instead, by investing in specialized talent who can interpret AI outputs, advise clients on complex strategic matters, and design innovative solutions, the Big Four can maintain a value proposition that is difficult for bots to replicate.

• Flexible, Value-Based Pricing: Rather than clinging to cost-plus or hourly-based models, forward-looking firms can experiment with fee structures tied to measurable outcomes, such as incremental revenue growth, cost savings, or risk mitigation. Although adopting a more nuanced pricing model may temporarily unsettle partners accustomed to predictable margins, it better aligns with clients’ emerging expectations.

• Adaptive Governance: Perhaps the most challenging aspect of reinvention lies in realigning incentives so that decisions are made with the future in mind. If the partnership structure remains rigidly committed to short-term payouts, the impetus for transformative change evaporates. Leadership must be empowered – not merely encouraged – to disrupt the status quo.

Conclusion

The partnership model, particularly as it exists in the Big Four, is reaching an inflection point. Stagnant demand, talent flight, competitive pressure, and especially the rise of AI are converging into a perfect storm. While the question of whether the partnership model can evolve is pressing, a more existential question looms larger: Will partners themselves allow it to change?

For firms content to double down on protecting high payouts, AI will be a threat. For those willing to reimagine how they harness talent, structure teams, and price engagements, AI becomes an ally – an accelerator that can drive the next phase of growth. Such a transition requires a candor that has rarely been part of partnership boardrooms: a willingness to let go of cherished traditions and shape a new ethos of agility, innovation, and shared risk.

The global marketplace is already making its preferences known. Clients are less inclined to fund bloated teams simply to sustain old hierarchies. In the end, the firms that build lean, flexible organizations – powered by AI yet guided by human insight – will thrive, while those clinging to the vestiges of an outdated model risk seeing their pyramids crumble under the weight of a new reality. If the Big Four hope to retain relevance, it is time for them to embrace change before change renders them obsolete.

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Alex Lew, CFA
Alex Lew, CFA

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