It is common to hear that football should “just bring in a salary cap like the NFL.” The suggestion misunderstands what the American cap is and why the European systems look nothing like it. A hard cap and a loss-limit regime are not two flavors of the same idea; they are answers to different problems, made possible by different structures. Lay them side by side and the divergence stops being a matter of will and becomes a matter of architecture.
The hard-cap model
The NFL sets a fixed dollar ceiling on team payroll, recalculated each year as a share of league revenue — players collectively receive roughly half. Every team faces the same spending limit; no owner can buy a structural advantage with payroll. The design goal is competitive balance, and it largely achieves it: the worst team can become the best in a season or two, and franchise values rise across the board because every franchise is a viable contender.
The players' union is the load-bearing piece most European observers miss. A hard cap is a restraint on wages, and in the American model the players agreed to it in exchange for a guaranteed share of revenue and other protections, negotiated collectively. Without a single counterparty that can bind all players, a hard cap is not just politically hard in football — it is legally fragile, exposed to challenge under labor and competition law the moment it bites.
The soft-control model
European football does not cap spending; it constrains losses. UEFA's squad-cost ratio limits wages and transfer amortization to a percentage of revenue. La Liga runs its preventive squad cost limit. The Premier League's Profit and Sustainability rules allow a defined loss over a rolling three-year window. All three police solvency rather than equality. Crucially, none of them equalize: a club with more revenue is permitted to spend more, so the biggest clubs remain the biggest, and the systems entrench hierarchy rather than flatten it.
The result is that European “caps” do not cap the thing fans think they cap. A club can spend more than any rival every single season, provided its revenue justifies it, and stay perfectly compliant. The rules prevent a club from spending money it does not have; they do nothing to stop a club that has more money from spending more of it. That is why the same names recur at the top — the system polices solvency, and solvency is easiest for the clubs that were already rich.
Why the models diverge
The American cap is possible because of structure the European game does not have: closed leagues with no promotion or relegation, a single collective-bargaining agreement with a players' union, and shared national media revenue. In that closed system, owners can agree to constrain themselves because none of them can be relegated out of the cartel. European football has an open pyramid, promotion and relegation, dozens of jurisdictions, and no continent-wide bargaining counterparty. A hard cap would require clubs across the pyramid to agree to cap themselves — and the ones with the most to lose from equalization are exactly the ones with the power to block it.
What each optimizes
The two systems are not better and worse; they optimize different things. The NFL optimizes competitive balance and, through it, the value of every franchise. European football's controls optimize solvency — keeping clubs from spending themselves into administration — while tolerating, even protecting, dynasties. One system is built to make any team able to win. The other is built to make sure clubs survive losing. Given how differently the two leagues are owned and structured, each has arguably chosen the constraint that fits it.
The trade-off each system makes is visible in the product. The hard cap manufactures uncertainty — any team can rise or fall quickly, which keeps more fan bases engaged and props up every franchise's value. The soft-control model tolerates dynasties, which produces reliable elite spectacle and durable global brands at the cost of domestic balance. One sells parity; the other sells the aristocracy. Fans of each are, in effect, buying different products, and often do not realize the other model was ever on the menu.
This is also the unspoken engine behind periodic breakaway-league proposals. A closed European super-competition would, among other things, import the economics of a North American league — no relegation, fixed membership, shared negotiated revenue — which is precisely the structure that makes a hard cap and guaranteed franchise values possible. Every super-league push is partly an attempt to convert open-pyramid economics into closed-league economics, and the resistance to it is partly a defense of the open pyramid that makes those economics impossible.
Also noted
The NBA occupies a middle ground: no hard ceiling but escalating luxury-tax penalties and “apron” restrictions that make sustained overspending progressively painful — a soft cap with teeth.
Major League Baseball has no cap at all, only a luxury tax, and shows what European football would look like without even loss limits: persistent spending gaps and weak balance.
Promotion and relegation is the single structural fact that makes a hard cap unworkable in Europe — you cannot run a closed cartel's tool inside an open pyramid.
Next week, back to the Champions League. The league phase is halfway through, the table is forming, and it is a good moment to trace exactly where the prize money goes — and why two clubs on identical points can earn very different sums.
Views my own. Educational, not investment advice.
— @thesportsstrategist