A budget starts with net worth, not with what's left over
Why "save whatever is left" almost never works, and how to build the month with your contribution as the first bill you pay.
The most common budget has three lines: the salary comes in, the bills go out, and whatever is left goes to savings. The trouble is the third line. It is the only one with no creditor on the other side — rent chases you, the card chases you, the future never does. So it is always the one that gives.
Flip the order
The fix is easy to state: the contribution is the first bill of the month, not the last.
- Decide how much goes to net worth — a fixed amount, not a share of what's left.
- Treat it as a commitment with a date, just like rent.
- Build the rest of the month with what remains.
If the month gets tight, the adjustment happens in spending, where you can see it. If it still falls short, withdrawing is still possible — but then it's a named decision with a known amount, not a silent leak.
How much to contribute
There's no universal number. There is the question next to it: how long could your family keep its standard of living if the income stopped? Start with the amount that takes that answer to six months, and adjust from there.
