The large-group split for
year-end and new-year parties

A large-group split starts from a roster

A large-group split means a gathering of roughly 10 to 30 where, more than the math itself, managing "who's here and who you collected from" takes center stage. Four you can count at the register, but tracking 20 out loud is a stretch. So, rather than waiting for the check on the day, prepare a roster of participants first.

A roster makes two things far easier at once. One is being able to pick "in" or "out" per payment. You can accurately separate later who was only at the first round and who joined from the after-party. The other is that it becomes a collection checklist. Since you can see by name who paid and who hasn't, you don't miss anyone even in a big group. Keep names short and consistent, and if there are many same surnames at work, add first names or initials to prevent double entries too.

Payments are "added by everyone on the spot"

If the organizer holds all the receipts, it breaks down the bigger the group. Extra all-you-can-drink, the after-party check, taxi fares. Collecting them afterward, one will always slip through. Suguwari's live split is a setup where you share the "link everyone can add to" at the start, and whoever fronted money adds their own payment on the spot. Since people enter it the moment they pay, the organizer is freed from being the tally clerk.

Then at the end of the party, someone handles the check. Even, or drinkers pay more. The live participants' screens show the current split, so showing it — "right now the drinkers pay more" — you can get to agreement before people leave. The last few minutes with 30 people face to face are worth far more than 10 back-and-forths in the group chat the next day.

For a big group, two groupings is enough

The more people, the more you want to vary the amount person by person, but hold back there. Chase 30 people's drink counts and you get accuracy in exchange for collecting that never ends. What's practical is splitting into two groupings: drinkers and non-drinkers. Looking at the baseline four and ¥10,000, drinkers are ¥2,805 and non-drinkers ¥2,195, a gap of ¥610.

This two-way division holds up however many people. You can use it as-is with a split like 12 of 20 drank and 8 didn't. The more non-drinking attendees at a year-end party, the bigger the effect of this one extra step. When you want the finer ways to tilt, see the article on weighted splits.

Funnel the collection through the organizer

The messiest thing with a big group is the flow of transfers. Once each person starts sending to whoever they like, you can't track who paid whom. Funnel the check through the organizer alone and everyone just sends to the organizer, keeping transfers within "number of people minus one" at most. It's a form of settling only the gap between what the organizer fronted and each person's share.

Narrow the receiving methods to one or two. Accepting both cash and a payment app is fine, but line up three payment apps and the places to check scatter. For the deadline, add a non-blaming guide like "within the year" or "this week." For those not yet done, give a short nudge one-on-one rather than to the whole group. This kind of care pays off with a big group.

Same-day and later message templates

For a big group, one word in the nudge changes the impression. Write "some people still haven't paid" in front of everyone and anyone who suspects it's them feels awkward. Find the unconfirmed people from the roster and deliver it gently to just them. That's how the person who gets asked to organize again next year does it.

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