How do you plan a hen party people actually enjoy?

A bachelorette party goes wrong in predictable ways: it is too expensive for a third of the group, it is planned around what the organiser would enjoy, or the guest list quietly becomes a diplomatic incident. All three are avoidable, and all three are decided in the first two weeks of planning.

This article covers who does the organising, when to hold it, what different formats cost per person and how to run the day itself. Hen party and bachelorette party are used interchangeably throughout; the two have converged almost entirely, apart from the vocabulary and the average length.

By convention the chief bridesmaid or maid of honour leads, with the rest of the bridal party helping and the bride herself kept at arms length from the logistics. That convention exists for a reason: the party is a gift, and being handed the spreadsheet for your own gift is not one.

Arms length is not the same as excluded. Four decisions genuinely belong to the bride and should be settled with her in the first conversation.

• The guest list. Who is in, and specifically whether mothers, aunts and future mothers-in-law are in.
• The ceiling. The most she is comfortable asking her friends to spend.
• The no list. Anything she genuinely does not want: strippers, costumes, a surprise, being filmed, karaoke.
• The shape. One evening, one day, one night away or a full weekend.

Everything after that is yours. Surprises work well for the activity and badly for the date, the destination and the cost, because those are the three things guests need in order to say yes.

Four to eight weeks before the wedding is the reliable window. It is far enough out that a bad night has no consequences and close enough that it still feels connected to the wedding.

Avoid the weekend immediately before. Whatever the film industry suggests, the last seven days hold dress fittings, seating plans, deliveries and family arrivals, and a hangover is not the problem so much as the lost Saturday.

Two other timing points matter. If a meaningful share of the group has to travel or arrange childcare, send the date six to eight weeks before the party itself, not two. And if the wedding is abroad, consider holding the bachelorette party closer to home and earlier, because guests asked to fund two trips will pick one.

A rough sequence that works: agree the shape and budget three to four months out, send the date and cost to the group ten to twelve weeks out, take payment four to six weeks out, send the running order and the packing list the week before.

Cost is the single biggest cause of resentment, and it is entirely controllable. The figures below are per person and indicative, for the US.

Two rules keep it civil. Publish the all-in figure before anyone commits, including the bride's share if the group is covering it, because a headline price that later grows by 150 dollars is what people remember. And collect money before you book rather than after, so the person who drops out is not a debt for the organiser.

Splitting the bride's costs across the group is common and worth stating openly. On a ten-person weekend it adds roughly a tenth to everyone's bill.

There is also a quieter version of the cost problem. A guest who cannot afford the weekend rarely says so; she says she is busy that month. If one or two people decline for vague reasons, treat it as information about the price rather than about them, and consider whether a shorter or cheaper version would bring the group back together. An evening at home that everyone attends beats a weekend abroad that half the group misses.

The most common structural mistake is booking every hour. Groups move slowly, someone is always late, and a schedule with no slack turns the organiser into a sheepdog.

1. Late morning: arrival and something low effort. Brunch, a walk, checking in. Nobody is at their best before this.
2. Early afternoon: the main activity, ideally the one thing you have paid for. Two to three hours.
3. Late afternoon: genuine downtime. Two hours with nothing booked. This is where the party actually happens.
4. Evening: dinner, booked, with a table held past the time you think you need.
5. After: one plan, optional, that people can leave.

Make the evening leavable. On any group above six there will be someone pregnant, someone driving home, someone with a baby at home and someone who simply does not drink. A night that assumes everyone is out until two loses four people and gains an atmosphere.

Practical details that carry more weight than the theme: a single group chat with the address and times pinned, one person holding the bookings, a packing list if anything needs specific clothing, and dietary requirements collected once rather than three times.

The guest list is the bride's and the organiser's job is to hold the line she sets. Two conventions help. Everyone at the bachelorette party should be invited to the wedding, without exception. And the invitation is not automatic for every bridesmaid's friend or every cousin who hears about it.

Mothers and future mothers-in-law are the recurring problem, and there is no single right answer. Three arrangements are all normal:

• They come to the whole thing, and the plans are set accordingly.
• They come to the daytime or the dinner and leave before the later part.
• They are not invited, and a separate lunch is arranged instead, which avoids the awkwardness entirely.

Whichever you choose, apply it symmetrically to both mothers. Asymmetry is what causes offence, not the decision itself.

One more piece of etiquette that is often missed: someone who declines the bachelorette party has not declined the wedding, and should not be treated as having done so. Weekends away are expensive and people have lives you cannot see. Keep them in the group chat, and make sure they still get whatever the couple are sending round, whether that is a message thread or the details on the wedding website.

The reverse case is worth naming too. If a guest asks to bring somebody who is not on the wedding list, the answer is no, and it is easier to say once at the start of the planning than in the week before. The group is the group.