How to make a monthly budget, step by step
A monthly budget is simply a plan for your money: you decide in advance how much goes to each thing, instead of finding out at the end of the month. You don't need to be good with numbers or use complicated software. A sheet of paper and an hour are enough.
Why make a budget?
Without a budget, money tends to go to whatever is urgent or tempting. With one, you can:
- Know exactly how much you can spend without going into debt.
- Save consistently for your goals.
- Spot unnecessary expenses that repeat every month.
- Reduce stress: financial surprises become less frequent.
How to make a monthly budget in 6 steps
Step 1: work out your net income
Add up all the money that lands in your account each month after taxes and deductions: salary, side jobs, benefits, pensions. If your income varies, use the figure from your worst month in the last six. It's better to plan cautiously and end up with extra.
Step 2: list your fixed expenses
These repeat every month at the same or a very similar amount: rent or mortgage, loan payments, insurance, internet, phone, transit pass, childcare. They're the easiest to write down because you already know them.
Step 3: estimate your variable expenses
Groceries, fuel, eating out, clothes, gifts, going out. This is where leaks usually hide. Review your bank statements for the last three months and calculate the average for each category. Don't forget yearly expenses (car insurance, taxes, holidays): divide them by 12 and include them as a monthly expense.
Step 4: decide how much you'll save
Treat savings as another fixed expense, not as what's left over. A useful benchmark is the 50/30/20 rule, which suggests putting 20% toward savings and paying off debt. If you don't have an emergency fund yet, that should be your first goal.
Step 5: adjust until it balances
Subtract expenses and savings from your income. If the result is negative, you need to cut. Start with variable expenses, which are the most flexible, then review fixed ones: could you switch phone providers, renegotiate insurance or cancel a subscription? If the result is positive, assign the extra to a specific goal so it doesn't get lost.
Step 6: review and adjust every month
At the end of the month, compare what you planned with what you actually spent. The first few times there will be differences, and that's normal. Each month your budget gets a little more accurate.
Monthly budget example
Imagine someone with a net income of 2,000 a month (use your own currency; the proportions are what matter):
| Category | Type | Amount | % of income |
|---|---|---|---|
| Rent | Fixed | 700 | 35% |
| Utilities (power, water, internet, phone) | Fixed | 150 | 7.5% |
| Transportation | Fixed | 80 | 4% |
| Groceries | Variable | 300 | 15% |
| Fun and eating out | Variable | 200 | 10% |
| Clothes and other | Variable | 100 | 5% |
| Yearly expenses spread monthly | Fixed | 70 | 3.5% |
| Savings | Fixed | 400 | 20% |
| Total | 2,000 | 100% |
Notice that the budget adds up exactly to the income: every unit of money has a job. This is sometimes called "zero-based budgeting".
Common budgeting mistakes
- Being too strict. If you leave nothing for fun, you'll abandon the budget within two weeks. Include something to enjoy.
- Forgetting irregular expenses. Birthdays, car servicing or back-to-school costs aren't surprises: they happen every year. Spread them out.
- Having no cushion. Without an emergency fund, any surprise breaks the budget and pushes you into debt.
- Doing it once and forgetting it. A budget is a habit, not a document. Review it every month.
Tools to keep track of your budget
The best tool is the one you'll actually use:
- Spreadsheet: flexible and free. One column for the plan and another for the actual numbers is enough.
- Budgeting apps: many connect to your bank and categorize spending automatically.
- Envelope method: putting the cash for each category into its own envelope. Very visual and effective for controlling variable spending.
Want a quick way to split your paycheck? Try our 50/30/20 calculator.
This article is for information only and is not personalized financial advice. Before making important decisions, consider your own situation or talk to a professional.