Who actually pays for a new stadium?
Usually some combination of the club, private investment and public money — and the proportion of public money is consistently higher than fans assume, which is why stadium funding is politically contentious wherever it happens.
The funding sources:
Club or owner capital, frequently the smallest share in the largest projects.
Debt, secured against future revenues, which is how many clubs fund construction and why a stadium can constrain a club financially for decades.
Naming rights and sponsorship, sold upfront or over a long term.
Seat licences and premium seating, sold in advance — effectively supporters pre-paying for the right to buy tickets.
Public subsidy, which takes many forms: direct grants, land provided free or below market value, infrastructure built at public expense, tax exemptions, and favourable financing.
Property development, increasingly the real model — the stadium anchors a scheme of housing, retail and offices, and the development pays for the venue.
The economic argument, and what research finds. Clubs argue new stadiums create jobs and regenerate areas. The academic consensus is considerably more sceptical: sports economists have repeatedly found that public subsidies for stadiums generate little net economic benefit, largely because spending is displaced from other local leisure rather than created, and because many jobs are seasonal and low-paid.
What is genuinely defensible: infrastructure improvements that serve the wider area; regeneration of genuinely derelict land; and civic and cultural value, which is real and hard to monetise but should be argued on its own terms rather than dressed as economics.
Why clubs have leverage. The implicit or explicit threat of relocation is powerful in leagues where franchises can move, which is a substantial part of why public subsidy is higher in those systems than in leagues with promotion and relegation and deep local roots.
What to look for in any proposal: who owns the asset at the end; what happens if the club leaves or fails; whether the public contribution is a loan, a grant or forgone revenue; and whether the projected attendance and spending figures have been independently reviewed.