Restaurants operate on some of the thinnest margins in retail, which explains a great deal about how they behave.

Cost structure

Food, labour and rent as the dominant items.

Which together consume most of revenue.

Food cost percentage

Menu prices set as a multiple of ingredient cost.

Which is why some dishes exist.

Covers and turnover

Revenue depending on how many times a table is used.

Why so many close

Undercapitalisation, location and fixed costs that continue during quiet periods.

Where the money actually goes

Roughly a third to food, a third to staff and a substantial further share to rent, utilities and everything else.

Which leaves a margin thin enough that a modest fall in covers turns a profitable site into a loss-making one.

That is why restaurants that seem busy still close: busy at the wrong times, or busy at the wrong margin, is not the same as profitable.

Menu design

Dishes chosen partly for margin and for shared ingredients.

Which reduces waste and complexity.

Wine and drinks

Higher margins subsidising food.

Which is why drinks are pushed.

Delivery platforms

Commission rates affecting viability substantially.

Staffing

Recruitment and retention as a persistent difficulty.

Why so many close in the first years

Fixed costs continue during quiet periods, opening consumes capital before revenue begins, and the margin leaves little room for error.

Which means a restaurant can be well run and well liked and still fail on location or timing.

Undercapitalisation is the most commonly cited cause: opening with just enough money to open and none to survive a slow first winter.

Seasonality

Revenue varying substantially through the year.

Which requires reserving during good months.

Waste

Food ordered and not sold.

Which directly reduces an already thin margin.

Reviews

Online ratings affecting bookings measurably.

What diners rarely see

Preparation, ordering and administration occupying most of the day.

What this explains about eating out

Why portions and prices move together, why some dishes never leave a menu, why service charges are contested, and why closures cluster after quiet seasons.

Which are all consequences of a margin that leaves very little room.

It also explains why delivery platform commissions have been so damaging to independent restaurants: a commission of any size takes a large share of what was left.

Tipping and service charges

Arrangements varying enormously by country and by venue.

Which affects what staff actually receive.

Independent against chain

Purchasing power and overhead differing substantially.

Supporting local restaurants

Booking directly and dining in.

Which returns more to the business.

The people involved

Long hours and demanding conditions across the sector.

Why it is worth knowing how these things work

Most of the systems that shape ordinary life are invisible by design. Nobody explains why a parcel took an odd route, why a film left a streaming service, why a wait in an emergency department extended, or why the price of a flight changed between two searches.

The absence of explanation is rarely deliberate concealment. It is that the people running these systems are solving their own problems, and the reasoning behind their decisions is obvious to them and completely opaque from outside.

Understanding the mechanism does not always change what you can do about it. It does remove a category of low-grade frustration that comes from assuming something is arbitrary, unfair or aimed at you personally when it is usually none of those things.

A note on sources

Where regulation is involved, national regulators publish the actual rules and they are generally clearer than press coverage of them. Where an industry is involved, trade publications aimed at people working in it are considerably more informative than consumer coverage.

Practices described here vary substantially between countries, and anything with legal, financial or medical consequences warrants checking against the rules that apply where you are.

The pattern that recurs

Across almost all of these systems, the same three things turn out to be true. The behaviour that looks irrational from outside is optimising for something the observer cannot see. The cost that seems unexplained is usually concentrated in one specific stage of the process. And the information that would resolve the confusion is generally published somewhere and read by nobody.

That last point is the most useful one. Regulators, operators and industry bodies publish an enormous amount of explanatory material that answers exactly the questions people complain about not being able to get answers to. It is dry, it is not promoted, and it is free.

What to do with any of this

Very little of it changes a decision on its own. What it changes is the ability to ask a better question: of a company, of a service, of a regulator, or of yourself before assuming that something went wrong.

A final caveat

Everything above describes general practice. Individual companies, jurisdictions and circumstances differ, sometimes substantially, and the rules change more often than summaries of them get updated.

Where a decision matters, the official source for your own country is worth the ten minutes it takes to check.