You have confirmed the guest list at 120, booked the venue, and now you are staring at a spreadsheet trying to work out whether 15 cases of prosecco is generous or reckless. Estimating drinks per head is one of the most anxiety-inducing tasks in wedding planning, and getting it wrong means either embarrassing dry spells at 9pm or boxes of untouched wine cluttering your hallway for months afterwards.
The good news is that there is a practical formula behind the guesswork. With a few sensible calculations and an understanding of how wedding drinking patterns actually work, you can nail your bar quantities with confidence.
The Golden Rule: Five to Six Drinks Per Guest Over Five Hours
Industry data and years of real-world wedding experience point to a surprisingly consistent average. Most adult guests will consume between five and six drinks over a typical five-hour evening reception. That includes everything from the welcome drink through to the last dance.
Here is how that typically breaks down across the evening:
- Arrival drinks (first hour): One to two drinks per guest. This is the fastest consumption period because guests arrive thirsty and excited. Prosecco, a signature cocktail, or Pimms in summer all work brilliantly here.
- Dinner service (one to two hours): One to two drinks per guest. Consumption slows while people are seated and eating. Wine on tables is the standard, and you should budget roughly half a bottle of wine per person for the meal.
- Evening reception (two to three hours): Two to three drinks per guest. The bar is open, the dancing starts, and guests shift to whatever they fancy. Beer, spirits and mixers, and cocktails tend to dominate.
A 120-guest wedding therefore needs roughly 600 to 720 individual servings across the evening. That sounds like a lot, but spread across wine, beer, spirits, soft drinks, and cocktails it becomes far more manageable.
Adjust for Your Crowd (Because No Two Guest Lists Are the Same)
The five-to-six rule is an average, and your wedding is not average. Several factors push consumption up or down, and being honest about them saves both money and embarrassment.
- Time of year: Summer weddings see higher consumption of cold drinks, especially prosecco, gin and tonic, and beer. Winter weddings tend towards wine and spirits, with slightly lower overall volume.
- Day of the week: Saturday evening weddings consistently see higher consumption than midweek or Sunday celebrations. Guests feel freer to indulge when there is no Monday morning alarm.
- Demographics: A guest list heavy with university friends in their twenties will drink differently from one dominated by elderly relatives and families with young children. You know your crowd better than any formula does.
- Food provision: Generous canapes, a substantial meal, and late-night snacks all slow alcohol consumption. If food is lighter, guests drink more and faster.
- Duration: A three-hour afternoon reception needs far less than an all-day celebration running from noon until midnight.
A practical tip: estimate that around 10 to 15 per cent of your adult guests will not drink alcohol at all. Always provide appealing non-alcoholic options rather than relegating teetotallers to tap water and orange juice.
The Split: What Types of Drinks Should You Stock?
Knowing how many drinks you need is only half the puzzle. You also need to know what kinds. A reliable starting split for a mixed guest list looks something like this:
- 40 per cent wine (split roughly 60/40 white to red in summer, 50/50 in winter)
- 25 per cent beer and cider
- 20 per cent spirits and mixers (gin and tonic remains the dominant choice at UK weddings)
- 10 per cent cocktails or signature drinks
- 5 per cent soft drinks and non-alcoholic alternatives
If you are offering a signature cocktail on arrival, bump the cocktail percentage up and reduce wine accordingly. If your crowd is firmly a beer-and-lager crowd, adjust the beer allocation upwards. The key is knowing your guests and being realistic rather than aspirational about their tastes.
Where Professional Bar Hire Takes the Stress Away
One of the biggest advantages of hiring a professional mobile bar service is that the drinks estimation problem largely disappears. Experienced bar teams have served hundreds of weddings and know exactly how consumption flows through an evening. They can look at your guest count, your venue, your timings, and your preferences and build a drinks plan that minimises waste and avoids shortages.
With a staffed bar, stock can often be managed on a sale-or-return basis, meaning you are not gambling with cases of wine you might not need. Bartenders also pace service naturally, ensuring drinks flow steadily without the chaos of an unmanaged free-for-all.
For couples who prefer a more hands-on approach, a self-serve option like a Bar in a Box can work brilliantly alongside these calculations, letting you stock precisely what you want while giving guests the freedom to help themselves.
Stop Guessing and Start Planning
The difference between a wedding where the bar runs dry at half nine and one where everything flows perfectly is rarely luck. It is arithmetic, a little honesty about your guest list, and ideally the input of someone who has done this hundreds of times before.
If you would like help building a drinks plan tailored to your wedding, Viva Bar Hire can talk you through the options. Whether you want a fully staffed cocktail bar, a relaxed self-serve setup, or something in between, the team works across the whole of the UK and can advise on quantities, styles, and logistics. Visit vivabarhire.co.uk to start the conversation.