How to make a monthly budget in 6 simple steps

The salary arrives, the bills go out, and somewhere around the 20th you start wondering where the rest went. If that sounds familiar, you do not need more discipline, you need a plan. Learning how to make a monthly budget takes about an hour the first time, and much less after that. Here is a simple method in six steps, with a full example you can copy and adapt.

What a monthly budget really is

A monthly budget is just a decision, made in advance, about what each part of your income will do. Rent, food, transport, savings, fun: every amount gets a job before the month starts. It is not about cutting everything you enjoy. It is about choosing, rather than discovering at the end of the month what you chose without noticing.

Step 1: calculate your monthly take-home pay

Start with the money that actually lands in your account each month, after tax and deductions, not your gross salary. Add any regular extra income, such as a side job or an allowance.

If your income varies, use the average of your last three months, or better, your lowest month of the last three. Planning on a low month and treating anything extra as a bonus is the safest approach.

For our example, let us take Sara, who lives in Lisbon and takes home 1,800 EUR a month.

Step 2: list your fixed expenses

Fixed expenses are the amounts that come back every month and barely change: rent, utilities, phone, internet, insurance, loan repayments, subscriptions. Write them all down, even the small ones.

Do not forget irregular bills that come once or twice a year, like car insurance or a professional fee. Divide the yearly total by twelve and include it here, so it never takes you by surprise.

Sara's fixed expenses:

• rent: 750 EUR;
• utilities and internet: 110 EUR;
• phone: 20 EUR;
• transport pass: 40 EUR;
• insurance, yearly bills divided by twelve: 45 EUR;
• subscriptions: 25 EUR.

That is 990 EUR of fixed expenses.

Step 3: estimate your variable expenses

Variable expenses change from month to month: groceries, eating out, fuel, clothes, outings, gifts. They are the hardest to predict and the easiest to overspend on.

Look back at one or two months of spending to get realistic figures. If you have never tracked anything, a few weeks of logging every purchase will give you a far better estimate than a guess. Log cash purchases too, since they leave no trace on your statements.

Sara's variable expenses:

• groceries: 280 EUR;
• eating out and coffee: 120 EUR;
• personal and clothes: 80 EUR;
• outings and hobbies: 60 EUR;
• buffer for the unexpected: 50 EUR.

That is 590 EUR of variable expenses.

Step 4: set a savings goal and pay yourself first

Subtract fixed and variable expenses from income. For Sara: 1,800 minus 990 minus 590 leaves 220 EUR. That is her savings for the month, about 12 percent of her income.

The key habit is to move that money on payday, before spending starts, not at the end of the month with whatever is left. Give the savings a purpose, such as an emergency fund, a trip or a deposit, because a named goal is much easier to protect.

If the numbers come out negative, that is not failure, it is information. Go back to steps 2 and 3 and look for the categories you can trim, starting with the smaller variable ones.

Step 5: choose a budgeting method that suits you

There is no single right method. Pick the one you will actually stick to:

• The 50/30/20 rule: 50 percent for needs, 30 percent for wants, 20 percent for savings. Simple and great for beginners. See our full explanation of the 50/30/20 rule.
• The envelope method: a fixed amount for each variable category, in cash or virtual envelopes. When an envelope is empty, spending stops. Here is how to set up the cash envelope system.
• The daily allowance: divide what is left for variable spending by the number of days in the month. Sara's 590 EUR gives her about 19 EUR per day, a number that is easy to keep in mind.

You can combine them. Many people use the 50/30/20 rule to set big targets, then a daily allowance to stay on track day to day.

Step 6: track and review every week

A budget only works if you compare it with reality. Log your expenses as you go, then take ten minutes once a week to check each category. Are groceries on track? Did eating out already use most of its amount?

At the end of the month, look at what went well and what did not, then adjust next month's numbers. Your first budget will not be perfect, and that is normal. By the third month, it usually reflects your real life much better.

Making it easier with an app

A notebook or a spreadsheet works, but a budget app removes most of the effort. In Pennoway, the monthly wallet asks for your income at the start of each month, lets you carry over last month's balance, and computes how much you can spend per day. Your “left to spend” updates after every expense, so you always know where you stand without doing the maths.

The app also handles bills: you can schedule reminders before rent or subscriptions are due, and record the payment in one tap. If you are looking for a tool built around this kind of monthly plan, our page on the monthly budget planner app explains how it works.

Common mistakes to avoid

• Using your gross salary instead of what actually reaches your account.
• Forgetting yearly bills, which then break the month they arrive.
• Having no buffer. Something unexpected happens almost every month.
• Making it too strict. A budget with zero room for fun rarely survives past the second week.
• Never reviewing it. A budget you set once and never look at again is just a wish.

The bottom line

To make a monthly budget, start from your take-home pay, list fixed costs, estimate variable ones, pay your savings first, choose a simple method and check in every week. It takes an hour to set up and a few minutes a week to keep running. Pennoway, a free budget app, can do the arithmetic for you, with a daily allowance that keeps the whole month in view.

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