Guides to household money

Straight answers about running money in a household, including where the popular advice falls apart. Written to be useful whether or not you ever install this app.

• Why budgeting apps end up unopened after three weeks

  Almost everyone who quits a budgeting app blames their own discipline. The real causes are structural, and most of them are fixable in the first ten minutes of setup.

• How to share a budget with your partner without it becoming surveillance

  Joint tracking fails for social reasons far more often than technical ones. What to agree before you start, what to keep out of the shared book, and how to run the monthly conversation so it stays about numbers.

• How to split shared household expenses when you earn different amounts

  Fifty-fifty, proportional to income, or one pot: each rule is fair by a different definition and each breaks somewhere. How the three compare, and what to do about unpaid work, debt and savings.

• Does the 50/30/20 rule actually work for a family?

  Where the rule came from, why the "50% on needs" half is the part that breaks first, and what to do when housing alone eats most of your income.

• How to set a grocery budget that survives contact with a supermarket

  Food is the category most households want to control and the one where guessed budgets fail fastest. How to derive a number from your own spending, why the first figure is usually too low, and which tactics actually move it.

• Is it safe to put your spending in a budgeting app?

  Your ledger is a detailed record of where you go and what you do. What the different kinds of budgeting app actually hold, the questions worth asking before you commit, and honest answers for this one.

• How to record cash spending without inventing the numbers

  Cash is where a household ledger quietly goes wrong: no statement, no notification, and the purchases you lose are the small frequent ones you wanted to see. Four approaches, honestly compared.

• How to budget for the expenses that only happen once a year

  The insurance premium, the school fees, the car service, the trip home. A monthly budget that ignores them is slightly wrong every month and catastrophically wrong in one, and the fix is arithmetic rather than willpower.

• How to get your data out of a budgeting app

  Export is the difference between a service and a trap. What a real export contains, what to test before you commit years of entries, and the specific ways a CSV gets corrupted on the way between two apps.

• How to handle children’s pocket money in the household ledger

  Not the parenting question — the recording one. Allowance, payment for chores and reimbursement-on-demand each do something different to your numbers, and the third one is the one that surprises people.

• Why setting a budget is much harder than tracking spending

  Recording is a description of the past; a budget is a prediction plus a commitment. Those are different jobs, and both of them fail for reasons that have nothing to do with discipline.

• How much money transparency does a household actually need?

  Total visibility of every transaction is not the maximum of trust — it is a particular arrangement with a particular failure mode. What has to be transparent regardless, and what is better left undivided.

• Does paying by card actually make you spend more?

  The honest version of a very popular claim: what the famous experiment found, why later work is much more mixed, and the one asymmetry between cash and card that holds regardless of the effect size.

• How to track spending on a trip without ruining the trip

  Multiple currencies, one person paying for everybody, cash again, and no appetite for admin. How to structure a holiday in your ledger so that one week does not destroy the readability of the month around it.