A month can cost more than the one you pictured without a single splurge in it. The rent and the phone bill go out as expected, and so do a car insurance renewal nobody remembered, a birthday dinner and a train ticket home, none of them extravagant and none of them in the plan.

The short version of how to make a budget, drawn from government money guides in the US, Canada and Australia, runs to 6 steps:

1. Count the money that actually reaches you
2. List what you really spend, from statements
3. Give irregular costs a monthly line
4. Subtract, and close any gap
5. Treat savings as a bill paid on payday
6. Check the plan against reality every month

Money left over each month is the goal

In the Federal Reserve’s October 2025 survey of US adults, 86 percent of those who always had money left over at the end of the month had savings to cover 3 months of expenses, against 13 percent of those who never did. That is a link, not proof that budgeting builds savings. Income is linked to both: adults with higher incomes were more likely to have that cushion, and those in the top income band were about three times as likely as those in the bottom band to always or often have money left over.¹

The US Federal Trade Commission’s consumer guide describes a budget as a written plan for spending your money each month, meant to make sure there is enough every month and to help you save for goals or emergencies.² For US adults as a whole, the Federal Reserve’s survey found:

Why spending estimates come in low

People tend to underestimate their own coming spending, largely because they picture a typical week and leave out unusual costs, according to a 2022 series of 10 studies, published in the Journal of Marketing Research and including field studies in Canada and the UK and a national US sample. The same series tested a simple prompt that narrows the gap.³

The study

Moderate evidence

Howard and colleagues' 10 spending-forecast studies, 2022

In a 5-week field study, members of a Canadian credit union forecast each coming week’s spending, then reported what they had actually spent from their online bank accounts; their unprompted forecasts fell significantly short week after week. In a preregistered field experiment with UK users of a personal finance app, people who simply forecast their next week of online shopping underestimated it by about 32 percent. Those randomly assigned to first type one reason the week might differ from a typical one came within about 2 percent. For groceries, a steadier category, the prompt made no clear difference.³

The authors trace the gap to the shape of spending: most weeks cost about the same, while the occasional expensive one, such as a medical bill or a home repair, pulls the average above the typical week people picture. The main caveat is the outcome: the studies measured how accurate forecasts were, not whether people went on to save or borrow differently, which the authors call an important next step.³

A different research team reported the same underestimate in 4 studies published in 2009; according to the paper’s abstract, the only part we could read, people predicted spending substantially less in the coming week than they actually spent or remembered spending the week before, and those with stronger savings goals predicted lower spending, though the goals were not related to what they actually spent.⁴ The 2022 series found no clear link between the bias and having a savings goal, so that part is unsettled.³

1. The typical week: most weeks cost about the same, and this is the week people tend to picture when they forecast
2. The average week: what a budget has to cover over a year; rare expensive weeks pull it above the typical one
3. The rare expensive weeks: a medical bill, a home repair or a bill that comes once a year

How to make a budget in 6 steps

Making a budget takes 6 steps, from counting take-home pay to a monthly check, drawn from government agencies’ budgeting guides and from research on spending forecasts. The agencies are the US Federal Trade Commission and Consumer Financial Protection Bureau (CFPB), the Financial Consumer Agency of Canada, and Moneysmart, run by the Australian Securities and Investments Commission.

The steps work on paper, in a spreadsheet or in an app. On a low or uneven income the same steps apply, though closing a gap can take outside help as well as cuts.

1. Count the money that actually reaches you

Start with take-home pay, the amount that arrives after taxes and other deductions; the CFPB’s 2022 teaching guide calls it net income and says a budget should be built on it.⁵ Then add every other source of money you receive, such as a second job, self-employment, child support or government benefits, all of which the CFPB’s 2019 budgeting guide, now archived on its site, says should count.⁶

If you are not paid every month, the Federal Trade Commission’s guide suggests adding up last year’s income and dividing by 12.² If your income varies from week to week, Moneysmart suggests working out an average.⁷ For example, an uneven US$42,000 of take-home pay over 2025 (an illustrative figure) gives a planning figure of US$3,500 a month.

2. List what you really spend, from statements

The Financial Consumer Agency of Canada suggests gathering recent pay stubs, bills and account statements, and noting what you spend for 1 or 2 months.⁸ List every cost, including loan and credit card repayments; Moneysmart suggests checking bank statements so that nothing is missed, and recording what each cost is for, how much it is and when it is paid.⁷ The CFPB’s archived 2019 guide calls logging spending the heaviest lift of budgeting, and if it feels overwhelming, it suggests starting with one week at a time, using receipts or your checking account.⁶

3. Give irregular costs a monthly line

Costs that come once or twice a year belong in the budget too: Moneysmart’s guide lists irregular or unexpected costs, such as car repairs and services, annual bills and pet costs, as the last group of expenses to add.⁷ Add up a year’s worth and divide by 12 to get the amount to set aside each month.

Forecasts tend to miss these costs more than regular ones. In the 2022 UK field experiment, people underestimated a spiky category, online shopping, by more than they underestimated steadier grocery spending.³

4. Subtract, and close any gap

Take total monthly spending, including the irregular-cost line, away from monthly income. The Federal Trade Commission’s guide says the result should be more than zero; if it is less, you are spending more than you make, and the guide suggests looking for things in the budget you can change.² The Financial Consumer Agency of Canada suggests separating needs, which are necessary, from wants, which you would like but don’t necessarily need.⁸

A shortfall is not always about the total. The same archived CFPB guide notes that coming up short at the end of the month can mean the timing of your bills and income doesn’t match, and it pointed readers to a bill calendar for tracking due dates.⁶

5. Treat savings as a bill paid on payday

The Federal Trade Commission’s guide suggests you can make savings one of the expenses in your budget.² Moneysmart suggests setting a savings goal and automating it with a regular transfer to a savings account on payday, and it describes keeping separate accounts for bills, for spending and for savings.⁷

A first goal can be small; the archived CFPB guide suggests having one to work toward, whether small or large.⁶ A buffer for surprises matters: in the Federal Reserve’s 2025 survey, 12 percent of US adults said they could not pay a surprise US$400 expense by any means.¹

6. Check the plan against reality every month

The Federal Trade Commission describes a budget as something you use every month: plan at the start, write down what you spend each day, check at the end whether you spent what you planned, and use that to plan the next month.² The Financial Consumer Agency of Canada also suggests comparing your budget with what you actually spend at the end of each month.⁸ Moneysmart suggests updating the budget when your income changes, your bills rise or your goals change.⁷

Before each new month, add one question from the 2022 research: what could make it different from a typical one? In those experiments, which mostly used one-week forecasts, listing such reasons closed most of the gap between forecast and actual spending, except for steady costs such as groceries.³

1. 1Plan the monthask what could make it different
2. 2Record spendingdaily, or from statements
3. 3Compare at month endplan against what happened
4. 4Adjustcarry the lessons into next month

Then repeat from “Plan the month”

The first few cycles show which lines were guesses. Changing money habits won’t happen overnight, the archived CFPB guide cautions, and it suggests a support system of family or friends who will budget with you or listen when you are struggling.⁶

WiserHours

Your first budget

• Take-home pay from every source, averaged if it varies
• 1 or 2 months of spending listed from statements
• A year of irregular costs, divided by 12
• Income minus spending worked out, and any gap tackled
• A savings transfer set for payday
• A monthly check-in in the calendar
• Before each month: what could make it different?

Find this checklist online:
https://wiserhours.com/budgeting/how-to-make-a-budget/#checklist-how-to-make-a-budget-first-month

Budget rules of thumb are starting points

Rules of thumb such as 50/30/20 offer a first split of take-home pay, but they are teaching devices rather than tested findings: the research reviewed for this guide includes no trial of them. The CFPB’s 2022 teaching guide describes the rule as 50 percent of net income for needs, 30 percent for wants and 20 percent for savings goals, such as an emergency fund or paying down debt, and tells teachers to explain that not everyone can follow it.⁵

The same gap applies to named methods such as zero-based or envelope budgeting: the research reviewed here includes no trial comparing them with each other. Your own figures from steps 2 to 4 show whether a split fits.

Which budgeting steps have research behind them?

Most budgeting steps rest on government guidance rather than trials; the experiments on a single step in this guide concern spending forecasts. A 2022 series of 10 studies, published in the Journal of Marketing Research, found that people underestimate their coming spending and that a simple prompt narrows the gap.³

Trials of whole programs, which often teach budgeting among other skills, point in different directions. A 2022 meta-analysis of 76 randomized experiments with more than 160,000 people, in the Journal of Financial Economics, found that financial education programs on average improved financial knowledge and later financial behaviors.⁹ For one-to-one financial coaching, a 2026 Campbell systematic review of 11 US studies, 8 of them randomized, judged the effect on finances uncertain, because the studies had methodological weaknesses and measured different outcomes.¹⁰

If the numbers don’t add up, get help early

Free or low-cost debt help exists in the US, the UK and Australia, and Australia’s Moneysmart advises using it early, because the earlier you get help, the more options you will have.¹¹ The tiers below are WiserHours’ own ordering of advice from US, UK and Australian government sources.

• Now: if you cannot pay for housing, food or utilities, or a creditor or court is taking action, get help straight away. In Australia, the free National Debt Helpline (1800 007 007, weekdays) puts callers through to financial counsellors, and Moneysmart says anyone facing legal action should get free legal advice straight away.¹¹ In the US, the CFPB says credit counseling organizations are usually non-profits and can give free or low-cost advice on money and debts.¹² In the UK, the government’s debt guidance points to MoneyHelper for free debt advice services.¹³ If money worries come with thoughts of suicide or self-harm, call or text 988 in the US, free and confidential at any hour, or your local emergency number elsewhere.¹⁴
• Soon: if step 4 shows spending above income for more than a month or two, or everyday costs are going on credit, contact one of the free services above within weeks. In the US, the CFPB says credit counselors can help with a budget and develop debt management plans, but it cautions that counselors may charge fees for some services and that, according to the Federal Trade Commission, some organizations offering such plans have defrauded people. It suggests getting a price quote in writing and checking an organization with your state attorney general and consumer protection agency.¹²
• At your next planning point: for personal decisions such as investing, retirement saving or a large loan, see a qualified, regulated financial adviser.

The bottom line

A first budget is only as good as its spending figures, so build it from statements rather than memory, give once-a-year costs a monthly line, and move savings on payday before the month can spend them. Before each new month, ask what could make it different from a typical one: in 2022 experiments, listing such reasons brought spending forecasts close to actual spending, though not for steady costs such as groceries.³ If spending keeps outrunning income, free or low-cost debt help from non-profits and government services exists in the US, the UK and Australia.