Household budget calculation for the loan application: 5 steps to bank approval
01/07/2025
3
Minutes
Katrin Straub
Managing Director at nextsure
An incomplete household budget is one of the most common reasons for a loan application being rejected. But it doesn’t have to be that way. We’ll show you how to prepare your finances correctly and convince the bank of your creditworthiness.
The topic in brief and concise terms
A household budget is a detailed breakdown of all monthly income and expenses and the central basis for the bank's credit assessment.
Please be absolutely honest and precise in all details, as the bank will verify your information against bank statements and SCHUFA reports.
After deducting the new loan instalment, plan a financial buffer of at least 15 to 20 per cent of your freely available income for unforeseen expenses.
The foundation: Why banks require a detailed household budget calculation
Banks do not grant loans out of pure generosity, but as a business. A household budget calculation serves as a central instrument for risk assessment. It forms the basis with which lenders assess your ability to service debt, i.e. to make repayments on time. Legal requirements for creditworthiness assessments even oblige banks to take this step. An incomplete or incorrect statement often leads to rejection; estimates suggest that more than ten per cent of applications fail because of such shortcomings. Your household budget calculation is therefore the most important document for building trust. A clean digital loan enquiry always begins with an honest self-disclosure. The accuracy of your details is crucial to the success of your application. This lays the foundation for a positive credit decision.
Step 1: Record all income in full
For a complete household budget calculation, you must take all regular incoming payments into account. Salary is only part of it. Income includes all earnings available to you on a monthly basis. An employee with net income of 3,000 euros must add further items. If you receive child benefit for two children, for example, another 500 euros is added. Here is a list of typical sources of income:
Net salary (including proportional bonuses or Christmas bonus)
Income from self-employment or a side business
Pension and retirement payments
Rental income from property ownership
Maintenance payments you receive
State benefits such as child benefit or parental allowance
Don't forget to also provide evidence of variable income from the last three years. This creates a solid basis for the calculation. A loan for unrestricted use can therefore be arranged more easily. This complete recording is the first step towards realistic budget planning.
Step 2: List fixed and variable expenses precisely
After your income comes the detailed recording of all expenditure. Banks distinguish here between fixed costs and variable living expenses. Fixed costs are contractually binding, recurring payments. These include, for example, monthly rent of EUR 1,100 or existing loan instalments of EUR 250. Variable costs fluctuate, but must be estimated realistically. Here is an overview for guidance:
Fixed costs: rent, ancillary costs (electricity, heating), insurance contributions, subscriptions, savings instalments.
Variable costs: food, clothing, leisure, transport (car/public transport), holiday.
Many banks use a flat-rate household allowance for living expenses, which is often set at EUR 800 for the first person in the household. If your actual costs are lower, prove this with bank statements for the last three months. If you combine several loans, this reduces the number of fixed instalment payments. An accurate breakdown prevents the bank from calculating with excessively high flat rates and assessing your creditworthiness more poorly.
Step 3: Determine the available amount
The actual household budget calculation is a simple comparison: total income minus total expenditure. The result is your freely available income, from which the new loan instalment must be paid. Let’s take an example: your income adds up to 3,500 euros, your expenditure to 2,400 euros. That leaves 1,100 euros per month. The future instalment for your desired loan must be comfortably covered by this amount. Banks always factor in a safety buffer. A rule of thumb is that the new loan instalment should not account for more than 50 to 60 per cent of disposable income. In our example, an instalment of up to 550 euros would be realistic. With an online loan adjustment calculator, you can try out different scenarios. This shows you how the instalment affects your monthly budget.
Step 4: Avoid common mistakes when applying
Even a well-prepared household budget can lose its impact due to avoidable mistakes. Inaccurate or incomplete information quickly leads to follow-up questions or a rejection. Make sure to avoid the following three common sources of error:
Forgetting irregular expenses: Annual insurance premiums (e.g. EUR 480 for car insurance) or the utility bill must be converted to a monthly amount (here EUR 40).
Setting living costs too low: unrealistic figures for food or leisure of only EUR 200 a month seem implausible and will be corrected by the bank.
Concealing existing liabilities: The bank checks your Schufa data and will find loans or instalment payments not declared সেখানে, which reduces your credibility.
Our expert tip: Keep a digital household budget for at least three months before applying for a loan. This will give you realistic figures for your variable expenses. A reputable loan comparison helps you find suitable offers in advance. Avoiding these mistakes significantly increases your chances of a quick approval.
Step 5: Create and submit the budget account online
In the digital age, you no longer need to painstakingly prepare your household budget on paper. Most banks offer digital forms as part of the online application, allowing you to enter your figures directly. This speeds up the process considerably. One advantage is that these forms already ask for all relevant items, so you cannot forget anything important. For preparation, you can also use simple Excel templates or household apps. These tools help you gain an accurate overview of your finances over several months. Use the online ID verification process for identification, to complete the application process entirely digitally. A neatly prepared online household budget is the final building block for your successful loan application. Request an individual risk analysis now: Have your insurance situation checked free of charge and receive specific recommendations for optimisation.
More useful links
Deutsche Bundesbank provides detailed analyses and assessments of the stability of the German financial system in its financial stability reports.
KfW provides information about its funding programmes for private individuals that cover a range of financing needs.
Wikipedia provides a comprehensive explanation of the credit agreement, its components and legal aspects.
gesetze-im-internet.de provides the official legal text of Section 488 of the German Civil Code (BGB), which governs the legal basis of loan agreements.
FAQ
What documents does the bank need in addition to the household budget calculation?
The bank usually requires the last three payslips, bank statements for the last three months, existing loan agreements and proof of additional income such as tenancy agreements or pension notices.
What happens if I forget expenses when calculating the household budget?
If you forget to declare expenses, the bank will probably discover them by checking your bank statements or your Schufa report. This can lead to follow-up questions or be interpreted as an attempt to make your financial situation look better, which jeopardises the loan approval.
Is my overdraft facility taken into account in the household budget calculation?
Yes, if you regularly use your overdraft facility, the bank will treat the interest burden as an ongoing expense in the household budget calculation. Refinancing the overdraft may make sense here.
How do I handle irregular income such as bonuses?
Irregular income such as annual bonuses or Christmas bonuses should be substantiated with evidence from the last two to three years. The bank then counts these additional earnings proportionately towards your monthly income.
Can a partner be included in the household calculation?
Yes, if you take out the loan jointly, both incomes and expenses are included in a shared household calculation. This usually increases the chances of loan approval and better terms.
Will keeping a household budget improve my chances of getting credit?
Indirectly, yes. Keeping a household budget for several months helps you create an extremely accurate and realistic household budget calculation. This precision and the supporting evidence can convince the bank of your financial reliability.
