World 5 · Spending & consumption · Lesson 2 of 12

Where your money actually goes

Fixed and variable, essential and discretionary: seeing a month of spending clearly changes decisions.

6 min read · Level: Foundation · Free — no account needed to read

The idea

Ask most people what they spend in a month and the answer will be lower than the truth. Large costs — rent, bills — are easy to remember. Small, frequent costs — snacks, rides, top-ups, subscriptions, small treats — fade from memory while quietly adding up to a large share of spending.

Two ways of sorting spending help. Fixed expenses stay about the same each month (rent, loan payments, subscriptions); variable expenses change (food, transport, entertainment). Essential spending keeps life running; discretionary spending is optional. Fixed-and-essential costs are hard to change quickly; variable-and-discretionary costs are where change is easiest and least painful.

Before changing anything, it helps simply to see. A month of spending, written down and grouped without judgement, often shows more than any budget.

Why it matters

You cannot steer money you cannot see. Knowing where it really goes is the foundation for every other money decision.

A real example

The situation

Wei feels she never has money left at the end of the month, but cannot think of anything she spends much on besides rent and food.

What happened

She records every purchase for a month and finds three forgotten subscriptions and daily takeaway coffees that together cost more than her phone bill. She cancels two subscriptions and keeps the coffees she enjoys most.

The takeaway

She looked at what she really spent before deciding what the problem was.

How people actually behave

Memory favours large, unusual purchases and forgets small, regular ones. That is why people are often surprised by how much a month of small spending adds up to.

Common mistakes

• Trying to cut spending before you have looked at it.
• Focusing only on big costs while small ones add up unnoticed.
• Judging yourself for what you find instead of treating it as information.

Questions to think about

• Which category do you think you spend most on after housing? Check whether you are right.
• Which spending did you not enjoy or value at all last month?

Try it: One month, four groups

1. Log everything you spend for one month, or use last month’s statement.
2. Group it into fixed-essential, variable-essential, fixed-optional and variable-optional.
3. Look first at the variable-optional group for easy changes.

Words in this lesson

• Fixed expense — A cost that is about the same every month and hard to change quickly.
• Variable expense — A cost that changes from month to month.
• Discretionary spending — Spending on things you could choose to do without.