Your plan
The most elastic item is the guest list: ten fewer people move more money than any negotiation.
Three rules that hold
First, set the budget before the guest list, never the other way round: it is the only way to stay in control. Second, keep a contingency of at least 10 %: overruns almost always come from the same items — drinks, venue overtime, guest transport. Third, agree in writing who pays for what, including where families contribute: it is the leading source of friction in planning a wedding, well ahead of the decoration.
Where the money actually goes
Across most weddings the split is remarkably stable: catering and drink take around 40 % of the total, the venue 15 to 20 %, photography and video 10 %, outfits 10 %, music 7 %, flowers and decoration 7 %, with the rest spread over stationery, transport, rings and contingency. When a budget blows up it is almost always through the first item — because the guest list grew.
- Drink is the most underestimated item. Check whether corkage is allowed: bringing your own wine can change the total by thousands.
- Venue overtime is expensive and gets decided at one in the morning, when nobody feels like counting.
- The date is money: a Saturday in June costs far more than a Friday in September for exactly the same service.
- Guest favours and decorations bought new are the two expenses couples most often remember as pointless.
Frequent questions
Which item is most underestimated?
Drink, then venue overtime. Both are decided late and billed dearly.
Should there be a contingency?
Ten per cent at least. On a thirty-thousand budget, unplanned spending routinely passes three thousand.
How do you cut the total sharply without losing the party?
Shorten the guest list, move the date off a peak-season Saturday, and check whether corkage is allowed. Those three levers outweigh all the others combined.