Fixed and variable expenses: how to sort them in your budget
What fixed, variable and discretionary expenses are, how to sort your own with examples and why splitting them shows you how much you can spend each day.
Fixed expenses are the ones you pay about the same every month; variable ones change with what you do. Splitting them is the first step of any budget, because only the variable ones leave you room to manoeuvre.
What each type is
Finanzas para todos suggests three categories:
| Type | What it is | Examples |
|---|---|---|
| Fixed, compulsory | Constant every month | Rent or mortgage, loan repayments, utilities, transport |
| Variable, necessary | Essential, but they vary | Food, clothes |
| Discretionary | Leisure, not essential | Nights out, treats, some subscriptions |
How to sort yours
- Gather your spending for the last two or three months. The more realistic the record, the better. That’s what Finanzas para todos recommends.
- Put each expense in its category. If you can’t decide between necessary and discretionary, ask yourself: would anything happen if I stopped paying for it for a month?
- Add up each group and compare it with what you earn.
Why splitting them helps
- Fixed costs are your floor. If you can’t cover them, the rest doesn’t matter.
- Variable costs are your margin. This is where you can adjust without moving house or changing contract.
- Discretionary costs are the first to cut if a month gets tight.
And remember what the same source says: put part of your income towards saving, however little.
Common mistakes
- Forgetting yearly costs, such as insurance or taxes. Divide them by twelve so they don’t catch you out.
- Putting everything under “miscellaneous”. If a category grows, break it down.
- Not reviewing. A fixed cost can stop being fixed: a new contract, a bill that goes up.
In Pastizal you assign what comes in to each category and see how much is left in each one; what’s left over rolls into next month, and every morning it tells you how much you can spend today.