Set custom splits

Where the page is

Every house has its own Custom splits page, headed Custom splits - [house name]. You land here automatically the moment you finish adding a house. To come back later, open the house’s own page and look under Custom splits (shared bills), then select Edit custom splits.

The default: an even split

The page explains its own rule at the top: up until now, every cost centre for the house is split evenly across the participants living there. This page is where you change that - if one participant should pay a set amount for a specific cost centre, type it into their box on that line.

Blank, zero, and switched off

Three states on the same box mean three different things, worth reading in one place:

• Blank keeps that participant on an even share - blank does not mean zero. They take whatever is left of the bill once any custom amounts are subtracted.
• Typing 0 means that participant pays nothing at all, and the rest of the house covers the difference.
• Switched off applies to a consumables line specifically: if a participant’s own Consumables box is unticked elsewhere in SILWise, the provider covers their share instead, and they show here as not included and cannot be split. Every other shared bill always includes every participant living in the house - there is no per-participant switch for those.

Editing a line

Every shared bill included for this house is listed with its 90-day total and an Edit split button, which becomes Hide once open. A bill that is not switched on for the house is listed as not billed for this house and cannot be split.

As you type an amount into one participant’s box, the other participants’ shares update in front of you straight away, before you save anything - so you can see the effect of a change before committing to it. A running line under the list shows what the house is set to collect, so you can check it balances before you save.

The custom amounts you type in cannot add up to more than the bill’s total. If a participant has been switched off that bill, the amount the household owes shrinks and the provider covers the rest, so your customs only need to add up to that smaller remaining amount. If every included participant ends up with a custom amount, those amounts must add up exactly to what the house is set to collect, to the cent - SILWise blocks Save with an error until they do. The simplest way to avoid a mismatch is to always leave at least one participant blank, since they automatically absorb whatever is left over.

Continuing the chain

Once your splits are the way you want them, select Run the calculation at the bottom of the page to move on and work out what each participant owes. See run a calculation for what happens next.

How it shows up on a saved scenario

When you run a calculation and save it as a scenario, any custom splits you used are frozen into that record under its own Custom splits heading, listing which bill was split, who has a custom amount, and how much. An expandable Full line-by-line breakdown (per fortnight) table shows every participant’s figure for every cost line, with the custom amounts highlighted. If nothing was overridden, the section simply confirms every shared bill was split evenly. A saved scenario never changes after the fact - to change a split, come back to this page, update it, then run and save a fresh calculation. See the calculation reference for how these figures feed into the final rent and board totals.

What you should see

After you save a custom split, that participant’s row shows the amount you set, tagged custom, and the running total confirms what the house now collects. Next, run a calculation to see the new split reflected in each participant’s fortnightly total.