How to split the cost fairly with neighbors

Even split, by quantity, or by usage? A clear guide to dividing a group job so it feels fair to everyone — and stays drama-free.

The fastest way to sink a group buy is a split that feels unfair. The good news: a few simple methods cover almost every job. Agree on the method before the work, in writing.

Even split

Everyone pays the same share. Best when the work is roughly equal per home — a shared booking fee, a flat per-house service, a simple bulk order where everyone takes one.

By quantity

Each home pays for what it takes. Right for product buys (you order three, I order one) and anything measured in units — footage of fence, square metres of driveway, number of panels.

By usage or size

Cost tracks how much each home drives the price. Useful when homes differ a lot — a two-storey gutter job costs more than a bungalow, a bigger roof needs a bigger solar system.

Custom

Sometimes the coordinator just sets each share by hand because the job is lumpy. That's fine — as long as the numbers are visible to everyone.

Make it stick

• Decide the method up front, not after the invoice lands.
• Show the math openly so anyone can check their share.
• Have each home pay the vendor directly where possible, so no neighbor is stuck holding the group's money.

A platform like CohortBuy can generate the split automatically and track who's paid, which keeps the awkward money conversations to a minimum.