The empty chairs nobody booked a second time.

A missing table at 8pm on Saturday is not just one empty seat. It is the wine that never got poured, the dessert that never got plated, the staff hour you already paid for, and the walk-in you turned away three hours earlier. Most restaurants carry a 5 to 15 percent no-show rate and never put a number on it. Once you do, the path forward gets embarrassingly obvious.

• 01

  Average restaurant no-show rate sits between 5 and 20 percent, worst on Fridays and Saturdays.

• 02

  A well-timed 24-hour reminder typically reclaims around a quarter of no-shows on its own.

• 03

  Deposits or card holds on peak slots consistently cut no-shows by roughly a third to a half.

• 04

  EU consumer protection law allows modest, refundable pre-authorisations when disclosed clearly.

• Do deposits actually work, or do they just scare guests away?

  Both, a little. A small deposit or card hold on peak slots — 10 to 25 euros per person is typical in EU fine casual — reliably cuts no-shows by a third to half. You will lose a handful of bookings at the edges who would rather gamble on a different place. The maths almost always favours keeping the deposit. The trick is making the policy obvious at the point of booking and honouring it gracefully when life genuinely gets in the way.

• When should a reminder go out to actually reduce no-shows?

  Between 18 and 28 hours before the booking. Earlier than that and people have not re-engaged with their week yet. Later and they have already mentally committed or un-committed. One reminder, one clear cancel link, one line of warmth. A second nudge two hours before only helps if your cancellation window is still open — otherwise it is just noise.

• Is it legal in the EU to charge a no-show fee or keep a deposit?

  Yes, with the usual caveats. Under EU consumer protection rules, you can charge a pre-disclosed, proportionate fee or keep a pre-authorised deposit, as long as the terms were communicated clearly before the guest booked and they had a real chance to read them. Screaming "non-refundable" in 8pt grey footer text does not count. Reasonable amounts, plain language, visible at booking — that is the whole policy.

• SMS, email, WhatsApp — which channel wins for reminders?

  The one they actually chose. Open rates for SMS and WhatsApp sit around 95 percent, email closer to 30 to 40 percent for this kind of transactional note. If you can only do one, SMS wins by default. If you can ask at booking, let them pick — guests who opt for WhatsApp reply four to five times more often than guests you guessed on.

• Will tightening the cancellation window to 24h just annoy regulars?

  Only if it shows up as a surprise. Communicate it at booking, enforce it gently for first-time slips, and give your regulars an obvious human path to reschedule. A 24-hour window does two things: it recovers the seat in time for another booking, and it trains guests to treat the reservation like the mutual promise it is. Nobody is annoyed by policies they knew about.