How to split household expenses? Fair sharing models

The source of money arguments at home is usually not the amount but the ambiguity: who paid what, who owes how much? Writing the rule down upfront ends the argument.
Model 1: Equal split
All shared expenses are divided by headcount. Simple and fast; works best where incomes are similar.
Model 2: Income-based sharing
Everyone contributes in proportion to their income. The fairest model when incomes differ significantly; agree on the ratios upfront, in writing.
Model 3: Item-based split
One person covers rent, the other covers groceries and bills. Easy but can drift out of balance; needs occasional comparison.
How to track it?
The payer logs it, the system does the math. In the Parasyo+ Home+ Shared Wallet, whoever spends enters the amount; in-home debts are tracked automatically and settled with one tap at month-end. The "you paid less last month" conversation becomes history.
Whichever model you choose, the golden rule is the same: sharing that isn't written down is sharing that gets forgotten.