Cash flow
Most money problems that feel like income problems are timing problems, and timing problems have a cheaper fix.
A great many money problems that feel like income problems are timing problems, and the two need completely different solutions. A household whose income comfortably exceeds its annual expenses can still be short in the last week of most months, because income arrives on one day and expenses do not.
The distinction is between solvency and liquidity. Solvency asks whether the year works; liquidity asks whether today does. Someone who is solvent but not liquid experiences exactly what someone with insufficient income experiences, and will usually respond by trying to earn more or cut deeper — neither of which addresses a sequencing problem.
Two changes remove most of it. A one-month float, so this month is funded by last month's salary rather than by the credit arriving on the first. And a monthly provision for the annual bills that appear in no monthly budget and are therefore always a shock. Neither requires earning more or spending less, which is why they are the cheapest improvements available to most households.
Key terms
- Solvency
- Income exceeding expenses over a full year, including the annual ones. A household can be solvent and still run out of money most months, which is why solvency alone is not a useful test of whether the finances work.
- Liquidity
- Having money available on the day it is needed. The constraint that actually bites in week four, and one that is independent of whether the year balances.
- Float
- One month of expenses held permanently in the current account, so that this month is funded by money that arrived last month. Not an emergency fund and not counted as one — its only job is to break the dependency on the salary date.
- Annual lumps
- Predictable expenses that do not recur monthly — insurance renewals, fees, festivals, servicing, travel. Typically one to two months of income across a year, absent from every monthly budget, and experienced as emergencies for exactly that reason.
Frequently asked questions
Why do I run out of money before payday even though I earn enough?
Because the large fixed costs cluster at the start of the cycle and what is left has to last the rest of it. By week four the buffer is whatever survived rent, EMIs and insurance, and there is no tolerance for anything unexpected. This is a sequencing problem, and it persists at every income level until the sequence is changed.
What is the fastest fix?
Moving payment dates, because it costs nothing and can be done in an afternoon. Ask lenders to shift EMI dates, move subscription renewals, and spread the fixed outflows across the month rather than concentrating them in the first week. For many households this alone resolves it.
How much should a float be?
One month of typical expenses, held in the current account and never spent down. It is separate from the emergency fund and should not be counted toward it — one solves timing, the other solves shocks, and treating them as one pot means neither does its job when needed.
How do I stop annual bills surprising me?
List every non-monthly expense from twelve months of statements, total it, divide by twelve, and set that amount aside every month by standing instruction. The spending does not change; only the timing of when it is provided for does. Most households find the total is one to two months of income, which is why it has been destabilising every budget they have written.