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How to make a budget from your bank statements
A budget built from guesses tends to fail in the first week. A budget built from your own statements starts from what you really spend, so the limits you set are ones you have already lived with. The method below works with a spreadsheet or pen and paper; each step also notes how Home Budget Analytics does it, if you would rather not do the sorting by hand.
Why start from statements
Memory is a poor record of spending. People remember the big purchases and forget the small repeated ones - the coffee, the delivery fee, the app that renews every month. A statement lists every one of them with a date and an amount, which makes it the most honest source you have.
The aim is not to judge past spending. It is to get a realistic baseline, decide where you want it to change, and give each category a limit you can check against.
Six steps from statements to a working budget
Allow an hour for the first pass. Later months take a fraction of that.
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1
Collect two or three months of statements
One month can hide irregular costs, so take at least two, ideally three. Include every account you spend from, credit cards included. In Home Budget Analytics you upload the files (CSV, OFX/QFX, CAMT.053 and some PDF or Excel formats); if two files overlap, duplicates are skipped.
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2
Give every transaction a category
Use a short list - groceries, housing, transport, utilities, dining out, subscriptions, health, leisure. By hand this is the slowest part. In the app you confirm a category the first time a merchant appears, and that rule then applies every time that merchant appears.
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3
Separate fixed from variable costs
Fixed costs are the same every month and hard to change quickly: rent, insurance, loan repayments. Variable costs move with your choices. Total the fixed ones first, because they decide how much room is left for everything else.
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4
Set a limit for each category
Start from the monthly average of your statements, then adjust: keep fixed costs as they are, and lower the variable categories you want to change. In the app these are monthly category budgets, showing the limit, the percentage used, a safe daily spend and a projected month-end figure.
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5
Look for recurring payments
Scan for charges that repeat at the same interval. Cancel what you do not use. The app detects recurring payments for you and shows the cadence, the next expected date, any price increase, and the monthly and annual cost of each.
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6
Check the result against your income
Add up your limits. They should fit under your take-home pay with something left over, and that remainder is what you can give a job, such as a savings goal. Make sure transfers between your own accounts are not counted as spending; the app detects those and leaves them out.
Fixed and variable costs at a glance
| Type | Typical examples | How to budget it |
|---|---|---|
| Fixed | Rent or mortgage, insurance, loan repayments | Use the exact amount. Revisit it only when the contract renews. |
| Recurring | Streaming, software, gym membership | Review each one. Keep what you use, cancel the rest. |
| Variable essentials | Groceries, transport, utilities | Use your two or three month average plus a small margin. |
| Variable discretionary | Dining out, shopping, entertainment | Set the limit you want, not the average you had. This is where change happens. |
| Irregular | Annual fees, repairs, gifts | Divide the yearly total by twelve and treat it as a monthly cost. |
Mistakes that make a statement budget unreliable
- Using a single month. One quiet or one expensive month gives a distorted baseline.
- Counting money you moved yourself. A transfer from your current account to your savings account is not spending, and neither is a card repayment you already counted at the till.
- Leaving a large category called "other". If a quarter of your spending has no name, the budget cannot guide anything.
- Setting limits from an ideal month instead of real data. A limit you break every week is noise.
- Never rechecking. A budget is useful when you compare it with the next statement, not when it is written.
Common questions
Can I do this in a spreadsheet?
Yes. The six steps work with any tool. A spreadsheet is fine for one or two accounts; the effort grows with the number of transactions and the number of accounts, which is where a tool that remembers your category rules saves time.
How many categories should I use?
Between eight and twelve is enough for most households. Fewer than that hides patterns; many more makes every transaction a decision and the budget hard to read.
What about costs that only happen once a year?
Divide the annual amount by twelve and include it as a monthly line. That way the month the insurance or fee is due does not look like an overspend.
How often should I update the budget?
Compare each new statement with your limits. Adjust a limit when your situation changes, such as a new rent or a new subscription, rather than after every unusual week.
Skip the manual sorting
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