Zero-based budgeting: give every euro a job
Updated October 7, 2026 · By the Souski team
Zero-based budgeting means giving every euro of your income a job before the month starts, until nothing is left without a role. Income minus planned spending minus savings equals zero. It's the most precise way to take back control of your money. Here's how to set it up in 5 steps.
The idea: every euro has a job
In a typical budget, you plan the big expenses and "see what's left". In a zero-based budget, nothing is left to chance: you start from your income for the month and assign all of it, euro by euro, to your bills, day-to-day spending, savings and a buffer for surprises.
The formula is simple: income − everything assigned = 0. The name also reflects that you start from zero each month, instead of rolling last month's budget over without thinking.
Step 1: start from your real income this month
Add up what will actually land in your account this month: take-home pay, benefits, other income. If your income varies, use a cautious estimate.
Example: Nora takes home €2,300.
Step 2: assign your fixed bills first
Rent, energy, insurance, phone, transport, subscriptions, loan repayments. These are costs you can't avoid this month (see fixed vs variable expenses). For Nora: €1,080.
Step 3: decide your savings
Savings are an assignment like any other, and they come before wants. Nora puts aside €250: €150 for her emergency fund and €100 for her holidays.
Step 4: assign the rest down to the last euro
Nora has €970 left. She splits it across her variable spending:
| Job | Amount |
|---|---|
| Fixed bills | €1,080 |
| Savings (emergency + holidays) | €250 |
| Groceries | €360 |
| Transport and fuel | €110 |
| Eating and going out | €150 |
| Shopping | €90 |
| Health and personal care | €50 |
| Her sister's birthday present | €60 |
| Buffer for surprises | €150 |
| Left to assign | €0 |
Notice the "present" line: it's one of the method's biggest advantages. The month's one-off costs (a birthday, back to school, a car service) are planned for instead of catching you out.
Step 5: track your spending and reassign when needed
During the month, log your spending and compare it with what you planned (our guide on how to track your spending gives you a simple routine). If a category runs over, move money from another one: the total must always stay at zero. A budget isn't a fixed contract; it's a plan you adjust with your eyes open.
Pros and cons
- Pros: you know exactly what each euro is for, savings are protected, one-off costs are planned for, and spare money no longer vanishes into small purchases.
- Cons: you need to redo the budget each month and track spending regularly. The first months take a little attention while you find realistic amounts.
If the method feels too demanding to start with, the 50/30/20 rule is more flexible. If you want an even more concrete rule, envelope budgeting applies zero-based budgeting with one simple constraint: when the envelope is empty, you stop.
Zero-based budgeting with Souski
Souski is built around this principle. You enter your income for the month, set an amount for each category and savings goal, and the app always shows your money left to assign. When it reaches zero, every euro has a job. During the month, each expense you log reduces its category, and you see what you can still spend, in total and per day. It's also the core idea behind YNAB, made simpler: see our YNAB alternative page.
Your budget ready in 3 minutes, your spending logged in 5 seconds. Free, no bank connection.
Frequently asked questions
Does zero-based budgeting mean I have nothing left?
No. "Zero" refers to money without a job, not your bank balance. Every euro gets a job: spending, savings, a buffer for surprises. Your account can still hold money; it's simply set aside for something.
How is it different from envelope budgeting?
They share the same idea. Zero-based budgeting is the principle (assign everything before you spend); envelope budgeting is a concrete way to apply it, with one simple rule: when an envelope is empty, you stop.
How does it work with an irregular income?
Build your budget on your lowest income of the last six months. In good months, assign the extra as soon as it arrives: emergency fund first, then your goals. You can also budget next month using money you've already earned this month.
Do I need to redo my budget every month?
Yes, but it's quick: start from last month and adjust. Spending changes from month to month (gifts, back to school, tax, holidays), and zero-based budgeting makes you plan for it.
This guide gives general pointers and isn't personalised financial advice.