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How to make a monthly budget that actually works

6 min readUpdated 14 October 2026

Making a monthly budget means deciding in advance what job every euro of your salary will do: pay for your home, buy groceries, fund a holiday six months from now, build some savings. It isn't about going without — it's the opposite: when you know what you can spend on each thing, you spend without guilt.

1. Start from take-home pay

Build your budget on what actually lands in your account. Add up your net salary and any fixed income. Treat bonuses and refunds separately: add them only in the month they arrive, so you never budget money you don't have.

2. List fixed and annual costs

Fixed costs are the ones you don't choose each month: rent or mortgage, bills, subscriptions, loan repayments, insurance. Go through your last two or three bank statements and find them all.

Then think about annual costs: car insurance, road tax, holidays, Christmas presents. They wreck budgets because they arrive all at once. Divide them by 12 and set that aside every month: €480 of insurance becomes €40 a month.

3. Split your salary into spending categories

Give every euro a category. A few clear ones beat thirty line items: Home, Groceries, Transport, Health, Fun, Savings, plus annual costs. If you don't know where to start, use the 50/30/20 rule.

The golden rule: categories must add up to exactly your salary. Leftover euros go to savings; if you're short, reduce a category rather than ignoring the gap.

Example: a monthly budget on €1,800

Example monthly budget on a take-home pay of 1,800 euros
CategoryAmountCovers
Home€650rent, service charges, bills
Groceries€320supermarket, market
Transport€150fuel, travel pass, parking
Health€60pharmacy, appointments
Fun€200eating out, hobbies, shopping
Annual costs€60insurance, car tax, presents
Savings€360emergency fund, goals
Total€1,800every euro has a job

4. Log expenses as you spend

A budget you check once a month is just a report. Log each expense straight away, at the till, in seconds. If you forget, importing your bank statement at the end of the week catches up in a minute.

5. Check what you can still spend, every day

The useful question isn't “how much have I spent?” but “how much can I still spend until month-end?”. If you've used 70% of your budget by mid-month, you know to slow down now, not on the 30th.

6. Close the month and start again

At month-end, decide what to do with leftovers (savings, or carry them over) and overspending (taken from next month). Copy the budget to the new month and fix only what didn't work. After three months your numbers are realistic.

Mistakes that sink a budget

  • Categories that are too tight: an unrealistic budget lasts a week.
  • Forgetting annual costs: one insurance bill and it all falls apart.
  • No room for fun: cutting every treat makes you quit.
  • Only checking at month-end: by then you can't correct anything.

Doing your monthly budget with an app

A spreadsheet works, but you have to build and maintain it, and it's awkward on a phone. WeBudget does these 6 steps for you: it starts from your salary, suggests categories (even from your bank statement), sets aside annual costs and tells you every day what you can still spend. It's free and never asks for bank access.

Put this guide into practice with WeBudget

Ready-made categories, what you can spend each day and couples budgeting. Free, no bank connection.

Create your free budget