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How to Build a Budget You Can Actually Maintain

A simple spreadsheet to track income, expenses, and upcoming bills without expensive apps or too many categories.

By descobriu3 min readUpdated Oct 23, 2026
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Photo: Kelly Sikkema / Unsplash

A financial spreadsheet can get so detailed that you end up giving up on updating it. To start, you do not need to design a full dashboard or choose dozens of categories. The primary goal is to see the money coming in, commitments already made, and expenses yet to be paid. A simple system you maintain is more useful than a sophisticated template you stop opening after the first week.

Take a Snapshot of the Current Month#

The Central Bank presents personal budgeting as a financial planning tool. Our implementation proposal is to start with a list: date, description, category, amount, and payment status. Use a few categories that make sense to you. Separating housing, food, transportation, and other expenses can already help discover where you need more detail.

Record income when you know the amount and differentiate what was received from what is still expected. Do the same with expenses: a projected bill is not the same as a paid bill. If income varies, do not treat an optimistic expectation as available cash. The record should show uncertainty rather than hide it in a single sum.

Avoid Counting the Same Expense Twice#

Decide how credit card purchases will appear in your tracking. You can organize purchases and installments in a dedicated area and link that tracking to the statement. The point is not to add the entire purchase as a paid expense and then add the corresponding statement again. Choose a method, describe the rule, and apply it consistently.

A transfer between your accounts also deserves its own treatment: it can change where the money is without representing new income. When a transaction seems confusing, keep the description and check the statement. Do not delete a record just to make the balance look nice. The spreadsheet is a tool for understanding, not a demonstration of perfection.

Set Aside a Short Moment to Review#

The Central Bank guidance on budgeting encourages starting to note income and expenses and building this tracking. To turn this into a routine, our suggestion is to set aside a time that is already part of your week. Check recent records, mark payments, and look out for bills due before the next review.

After a full cycle, look for a specific issue: small unrecorded expenses, forgotten recurring charges, or installment purchases without a schedule. Adjust only what is necessary. Adding a category or a column makes sense when it answers a question, not just because another template online has more pages and charts.

When an App Can Help#

An app is worth comparing when it saves you from a truly annoying task. Test manual entry, export, and history reading before connecting accounts. Check the price, renewal terms, and plan limits, without assuming the free version will have the same features forever. Also read how data will be used and deleted.

rein You can stick with paper or a free spreadsheet if the method suits your routine. Before subscribing, define which feature you will use and how you will return to the previous control if you give up. This article is educational and does not recommend credit, investment, or a universal income split. In situations of debt or complex decisions, seek guidance suited to your case.

Sources

  1. Central Bank: what is a personal budget
  2. Central Bank: personal budget guidelines

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