The billable hour is dying, and only a product survives it.
McKinsey already books a third of fees on outcomes; Deloitte’s own chart puts hourly work at a sliver by 2035.
The Wall Street Journal put the whole industry on the record this week: the billable hour is going obsolete, and the firms are scrambling to price like software companies instead of renting out human time. The number that ends the debate came from McKinsey, where senior partner Shelley Stewart III said more than 30% of the firm's global fees now come from pricing tied directly to client outcomes, a share that has been growing for years. A Deloitte town-hall chart made the same point internally, projecting traditional hourly work shrinking to a sliver of the market by 2035 while AI agents grow to a majority of it. One consultant's takeaway was that the model is toast.
The reason the shift is so hard is the reason it matters. Baker Tilly's chief executive named the economics: AI creates low variable cost and high fixed cost, so a firm that keeps billing by the hour erodes its own margins, even as buyers still compare bids on an hours-times-rate basis. Catalant's chief executive was harsher, calling the move an existential scramble rather than a philosophical choice, because AI is destroying the business model underneath it. The firms are not choosing to reprice. They are being repriced.
But leaving the hour is not the same as arriving somewhere. Outcome pricing carries its own traps, the year spent proving the savings and the argument over who gets credit for them, which is why the cleaner destination is the one the article names first: a fixed fee, a predictable cost for a defined output regardless of the hours behind it. The catch is that you have to be built for it. Newton Consulting has booked every fee against operational outcomes since 2001, roughly 250 to 300 million dollars a year, and its managing partner is blunt that it is incredibly difficult to pivot toward this if it is not what your organization already represents. The Big Four are the most trapped of all, barred by audit-independence rules from tying pay to client outcomes at all.
That is the whole opening. The incumbents are trying to bolt product pricing onto a business whose known value is billable utilization, and the transition is slow and expensive precisely because they were not built that way. A model that starts as a product does not have that problem. A fixed price for a defined, owned output has no overrun to absorb and no subjective metric to litigate, because the unit of sale is the artifact, not the effort.