Personal finance: getting off to a good start

What personal finance covers

This guide explains how the basic concepts connect, how to prepare a realistic budget and a simple routine for reviewing your financial situation. The idea is not to control every cent at all costs, but to understand where your money goes and decide what you want to do with it.

Personal finance covers the decisions that affect your money: how you earn income, what expenses you have, how much you set aside for the future and how you manage debts. It also includes planning goals, from paying an outstanding bill to preparing for an expected expense.

In practice, the starting point is to compare what comes in with what goes out. You can then organise expenses, decide which priorities to address and check whether the plan still makes sense when your circumstances change. There is no universal allocation that works for everyone: housing costs, income stability, family responsibilities and other factors all play a part.

An organised overview can help you answer specific questions: how much money usually comes in, and when? Which expenses are essential, and which vary? What debt payments do I have outstanding? Is there money available for goals or unexpected expenses? Which category should I review first?

If you are learning the concepts from scratch, you can also consult these personal finance guides to explore specific aspects of organising money. A good foundation is not about getting a perfect budget right on your first attempt, but about knowing your situation and updating it when necessary.

How income, expenses, savings and debt relate

These elements are all part of the same balance. Income determines how much money you receive; expenses and debt obligations reduce what is available; savings let you set some aside for later. If one of them changes, you may need to adjust the others.

For example, if your income falls for a month, you may need to review variable expenses or postpone a savings goal. If debt instalments come to an end, that amount could go towards another priority. The aim is to see the connections before deciding what to change.

Income and expenses: the starting point

Income is the money you receive, such as a salary, payments for work completed or money from other sources. Expenses are the payments you make and the things you spend money on. To understand them better, you can separate them into two groups:

Fixed or recurring expenses: these tend to repeat, although the amount may change. Examples include rent, utilities or certain regular payments. Variable expenses: these fluctuate according to usage or decisions during the month, such as food, transport or leisure activities.

The classification does not have to be perfect. An expense can vary in amount and still recur regularly. What matters is identifying when it usually arrives and roughly how much it represents. To track income and expenses, record actual amounts whenever possible; estimates provide guidance, but it is worth checking them against available transactions or bills.

Saving for goals and unexpected expenses

Saving means setting money aside to use later. It may have a specific purpose, such as a trip or a household appliance, or it may help cover an unexpected expense. Keeping goals separate helps prevent all the money you have set aside from seeming available for any purchase.

If your margin is small, starting with a modest, sustainable amount may be more practical than setting a target that leaves needs unmet. You can also establish priorities: first cover upcoming expenses and obligations, then gradually increase what you set aside if your budget allows.

There is no single amount that is right for everyone. The goal depends on your expenses, the stability of your income, your dependants and other commitments.

Debt and ability to pay

A debt is an obligation to repay money under agreed conditions. To plan for it, record how much you owe, which payments are scheduled and when they fall due. This allows you to include instalments in your budget and distinguish money that is genuinely available from money that is already committed.

Your ability to pay cannot be determined by looking only at the size of an instalment: other expenses and income stability also matter. If an obligation becomes difficult to meet, avoid assuming that cutting a minor category will be enough; review your overall situation and seek appropriate guidance. For debt decisions that could significantly affect your circumstances, consult a qualified professional.

An organisational tool can help you record income, expenses and debts in one place. For example, a personal finance app can help you organise this information; recording it is not the same as executing payments or transfers.

How to prepare a budget you can maintain

A budget is a plan for allocating income to expenses, obligations, savings and other goals. It is not an exact prediction or a rigid rule: it is a reference you can adjust when your situation changes.

To prepare one, follow these steps: note the income you expect to receive during the period. If it varies, use a cautious estimate based on what you actually know. Record essential expenses and the debt instalments you need to pay. Add variable expenses, using observed amounts rather than just approximate recollections. If possible, set aside an amount for goals or unexpected expenses. Compare the plan with the money available and correct any discrepancy before treating it as valid.

A simple example: if 2.000 € comes in during a month, you could record 900 € for housing and utilities, 400 € for food and transport, 250 € for instalments and other commitments, 150 € for a goal and 300 € for variable expenses and other items. The total is only an example of organisation: it does not indicate how someone else should allocate their money. If your figures do not fit, adjust the categories to your actual needs and check that priority payments are included.

A useful budget should allow you to cover necessities and reflect your priorities. If a category falls short every month, it does not always mean a lack of discipline: the forecast may not match your actual spending. Review the amounts and change the plan rather than repeating an unrealistic figure.

You can choose how to get started based on what feels simplest for you. The essential thing is to begin with a few understandable categories, observe the data and increase the level of detail only if it helps you make better decisions.

Review your financial situation step by step

An initial review can be done in three parts: gather the data, calculate the balance and choose an adjustment. You do not need to reconstruct years of transactions; start with a period you can reasonably review, such as the last complete month.

Record income, expenses and debts

Gather whatever information you have available: receipts, statements, payslips, invoices, notes or other personal records. Record the amounts and a simple category for each one. If you do not know the exact amount of an expense, mark it as estimated and check it again when you have the figure. You can start with a table like this:

How to interpret the record and shared expenses

The table is not a recommended allocation. It helps you visualise categories and spot whether any expenses are missing. In households with shared expenses, also record who paid each amount and what share belongs to each person. For example, if one person pays 1.000 € in rent and the agreement is to split it equally, it is worth distinguishing the 1.000 € payment from each person's 500 € share when analysing their individual budgets.

Calculate how much remains available

Subtract the expenses and commitments you have recorded from your income. Using the example figures, the calculation would be:

2.000 € − 1.200 € − 400 € − 250 € − 100 € = 50 €

The result is a snapshot of that period, not a guarantee that the following month will be the same. If there is a margin left, you can decide whether to keep it available, allocate it to a goal or set some aside. If the result is close to zero, check whether you have included all expenses that arise irregularly. If it is negative, the plan does not balance, and you will need to examine which items can change and which obligations require attention.

Choose an adjustment and schedule a review

Do not try to change everything at once. Choose a specific action, such as reviewing a subscription, limiting a variable category or adjusting a savings target to a more realistic amount. Then set a date to check the result, for example at the end of the following month.

A review with a specific question is usually more useful than looking at all the numbers without a purpose: was transport spending close to the forecast? Did the money set aside remain intact? Did a payment arise that was not in the plan? The answer helps you correct the forecast and decide on the next step.

Keep tracking your finances

A budget is only useful if you can compare it with what happens. Tracking can be simple: record transactions regularly, categorise them consistently and review the differences between planned and actual figures. If you wait until the month is over, some small expenses may be hard to remember.

You can establish a short routine: during the week, record or keep a record of the expenses you want to review. Once a week, check that they are in understandable categories. At the end of the month, compare income, expenses, instalments and goals with the budget. When your income or commitments change, update the plan.

There is no need to create lots of categories at the outset. If “food” is enough to help you make decisions, you can keep it; if you need to distinguish regular shopping from eating out, add that detail later. The purpose of recording is to clarify decisions, not to turn every purchase into a chore.

Finantzak lets you organise accounts, income, expenses, budgets and debts. It can serve as a place to record and review financial information, but it does not make real payments or bank transfers. Web access and synchronisation between devices depend on Premium; free local use is available on Android. When choosing any tool, review its terms and decide what information you consider appropriate to record.

Personal finance FAQ: what do you do in finance?

In personal finance, you organise income, expenses, savings and debts to meet needs, plan goals and understand how much money remains available. You also review the plan when circumstances change.

What does the 50-20-30 rule mean?

It is a guideline that allocates 50 % of income to needs, 20 % to savings and financial goals, and 30 % to wants or personal spending. It is not a universal rule and may need adjusting according to your expenses and obligations.

How should I organise a budget if my income changes every month?

Separate essential expenses and committed instalments, and build the plan around a cautious income estimate, not your best month. When you receive more, decide in advance how to divide the surplus between needs, goals and reserves.

How much money should I keep for emergencies?

There is no amount that is right for everyone; it depends on your essential expenses, income stability and responsibilities. You can start with an achievable target and increase it as your budget allows.

Which debt should I try to pay first?

First review the conditions, due dates and consequences of each obligation; prioritise keeping required payments up to date. To decide how to allocate extra money, compare the terms of your debts and consider qualified advice if the situation is complex.

How often should I review my budget?

A brief weekly review helps keep records up to date, and a monthly review allows you to compare the plan with actual expenses. Review it as well if your income, housing or obligations change.

How can I identify expenses I can reduce?

Compare your actual expenses over several weeks or months and look for categories that repeatedly exceed the forecast or no longer reflect your priorities. Choose a specific change and check whether it is sustainable.

What is the difference between saving and leaving money unallocated?

Saving means setting money aside for a future goal or unexpected expenses; leaving it unallocated means you have not yet decided what role it will have. You can keep a flexible margin, but it is worth identifying it as such in the budget.

Start with a simple review and adjust the plan

To get started, gather the income, expenses and debts for a recent period. Calculate how much remains, identify a priority and set a date to review whether your chosen change has helped. This initial assessment does not need to resolve all your finances: it should give you a clear foundation for the next step.

Over time, you can refine categories, plan irregular expenses and adjust goals to your circumstances. A practical plan is not one that never changes, but one that helps you make decisions with current information and get back on track when the month does not go as expected.

Sources and further reading

To cross-check the concepts of budgeting and indicative money allocation, consult how to prepare a first budget and the explanation of the 50/30/20 rule from Finanzas para Todos. The percentages are a reference that can be adapted to each situation, not a mandatory allocation.

This guide is published by Finantzak. You can check the app's features and terms in what is Finantzak. The financial examples in this article are fictional and do not describe user results.

Sources consulted

• guías de finanzas personales
• app de finanzas personales
• elegir cómo empezar
• cómo preparar un primer presupuesto
• explicación de la regla 50/30/20
• qué es Finantzak