You have confirmed your guest list at 120, your marquee is booked, and your caterer has sent over the menu. Now comes the question that quietly haunts every couple planning a wedding reception: how much alcohol do you actually need? Order too little and your evening guests arrive to an empty bar at half nine. Order too much and you are left with thirty untouched bottles of Sauvignon Blanc and a receipt you would rather forget. Getting drinks per head right is part maths, part psychology, and part knowing your crowd.
The Golden Formula: Drinks Per Guest Per Hour
The drinks industry uses a well-worn rule of thumb that holds up remarkably well across UK weddings. During the first hour of a reception, guests typically consume around two drinks each. For every subsequent hour, that drops to roughly one to one and a half drinks per person. So for a five-hour evening reception with 120 guests, you are looking at somewhere between 600 and 840 individual serves.
That sounds like a lot, and it is. But here is where the detail matters. Not every guest drinks alcohol. A sensible planning assumption is that around 15 to 20 per cent of your guests will stick to soft drinks, mocktails, or water throughout the evening. For a 120-person wedding, that means you are really catering alcoholic drinks for roughly 96 to 102 people.
Adjust further for your specific crowd. A wedding heavy on young professionals who enjoy cocktails will drink differently from one where half the guest list are your gran's friends from the bowls club. Be honest about your people. It saves money and embarrassment in equal measure.
Breaking It Down by Drink Type
Knowing the total number of drinks is only half the puzzle. You also need to know what those drinks will be. A useful split for a typical UK wedding reception looks something like this:
- Beer and cider: 30 to 40 per cent of total alcoholic drinks, especially if you have a warm-weather wedding or a crowd that leans casual.
- Wine: 20 to 30 per cent, often consumed more heavily during the meal if you are serving wine with dinner.
- Spirits and cocktails: 20 to 30 per cent, with demand rising sharply later in the evening when the dance floor opens.
- Prosecco and champagne: 10 to 15 per cent, usually clustered around toasts and arrival drinks.
If you are offering a signature cocktail - say an Aperol Spritz for a summer reception or an Espresso Martini for an evening do - expect it to account for a disproportionate share of orders in the first hour. Novelty drives demand. Plan for around 60 to 70 per cent of guests to try it at least once.
The Mistakes That Catch Couples Out
The biggest error is not over-ordering across the board. It is over-ordering in one category and under-ordering in another. Couples frequently buy too much wine because they assume dinner drinking patterns will continue all night. In reality, once the band starts, most guests switch to beer, spirits, or cocktails. You end up with cases of untouched Merlot and a queue three deep at the bar for gin and tonics.
Another common misstep is forgetting about soft drinks and mixers. Tonic water, lemonade, soda water, and decent non-alcoholic options are not an afterthought. They are essential. Budget for at least one soft drink per person per hour as a baseline, covering both non-drinkers and those alternating between alcoholic and soft drinks.
Ice is the silent disaster. You need far more than you think, particularly for summer weddings in marquees or tipis with no air conditioning. A reasonable guide is one kilogramme of ice per guest for the entire event. That means 120 kilos for a 120-person wedding, which is roughly twelve large bags. It melts fast, and once it is gone, warm gin and tonics will be the lasting memory of your evening.
Why a Staffed Bar Takes the Guesswork Away
All of this arithmetic becomes significantly less stressful when you hand it to professionals. A staffed mobile bar service handles the stock calculation, the ordering, the chilling, and the pacing of service throughout the night. Experienced bar teams read a crowd in real time. They know when to push the cocktails, when to open more beer, and when to quietly start steering guests towards water as the evening winds down.
This is especially valuable when you are working with a venue that has no permanent bar - a country house garden, a tipi in a field, a village hall, or a barn. The logistics of getting the right stock to the right place at the right temperature are genuinely tricky, and they are exactly the kind of thing that a dedicated bar hire company manages every weekend.
Getting Your Quote Right from the Start
When you reach out for a quote, the most helpful information you can provide is your guest count, the approximate duration of your reception, and a rough idea of your crowd's drinking style. Mention whether you want a full cocktail menu or something simpler. Flag any signature drinks you have in mind. Note the venue type and whether there is power, water access, or shelter.
The more specific you are, the more accurate the stock estimate, and the less likely you are to face either a dry bar or a painful surplus.
If you are planning a wedding and want to stop worrying about whether you have ordered enough Prosecco, Viva Bar Hire can help. Their team will work through the numbers with you, build a drinks plan that matches your guest list and your budget, and arrive on the day with everything sorted. Get in touch through vivabarhire.co.uk for a no-obligation quote tailored to your wedding.