A circle that collapses rarely collapses over money. It collapses over a rule nobody wrote down, which two members remember differently, at the worst possible moment. The founding conversation is short, and it is the cheapest work the circle will ever do.
The five that are not optional
Settle these before the first contribution, in front of everyone, and write them where every member can read them afterwards:
The amount, and the date it is due. One figure, one day of the month.
The order of payout, and how it was decided.
What counts as late, and what happens then.
Who may join after the circle has started, and on what terms.
How a member leaves, including what they are owed and what they still owe.
Decide the exit while everyone is calm
Members leave. They move, they lose work, they fall out with someone. A circle that has never discussed it treats the first departure as a betrayal, and the group spends its goodwill arguing about a case it could have settled in a sentence before anyone had a stake in the answer.
The hard case is the member who leaves after receiving. There is no neutral answer, but there are honest ones: a repayment schedule, a replacement member who takes over the remaining contributions, or a deduction from a deposit held for exactly this. Any of them works. Having never chosen does not.
Put the record where everyone can see it
A circle run out of one person’s notebook asks every member to trust both that person’s honesty and their arithmetic. Most members are happy to extend the first. The second is where circles quietly break: an entry missed, a cycle counted twice, a payout nobody can reconstruct.
When the record is open, the treasurer stops being the only person who knows and becomes one of the people who can check. That is a better job, and it is the one most treasurers actually want.
Start smaller than you can afford
The first rotation is a test of the rules, not of the ambition. Run it at an amount every member could still pay in a bad month, see which rule turns out to be vague, and raise the amount for the second rotation with the vague rule now written properly. A circle that starts at its ceiling has no room to discover anything.
