Household budget for the loan application: 5 steps to bank approval
1 Jul 2025
5
Minutes
Katrin Straub
CEO at nextsure
An incomplete household budget is one of the most common reasons for a loan rejection. However, this doesn't have to be the case. We will 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 statement of all monthly income and expenses and serves as the central basis for the bank's creditworthiness assessment.
Be absolutely honest and precise with all details, as the bank will verify your information against account statements and Schufa reports.
After deducting the new loan installment, plan for a financial buffer of at least 15 to 20 percent of your disposable income for unforeseen expenses.
The Foundation: Why Banks Require a Detailed Household Budget
Banks do not grant loans out of sheer generosity, but as a business venture. A household budget calculation serves as a central tool for risk assessment. It is the basis used by credit institutions to examine your ability to pay back the loan, meaning the timely payment of installments. Legal requirements for creditworthiness assessment even obligate banks to take this step. An incomplete or incorrect statement often leads to rejection; estimates suggest that over ten percent of applications fail due to such shortcomings. Your household budget calculation is therefore the most important document for building trust. A clean digital loan application always begins with an honest self-disclosure. The accuracy of your information significantly determines the success of your application. By doing so, you lay the foundation for a positive credit decision.
Step 1: Record all income thoroughly
For a comprehensive household budget, you must take into account all regular income. Salary is only part of it. Income includes all funds available to you monthly. An employee with a net income of 3,000 euros needs to add further items. For instance, if you receive child benefit for two children, an additional 500 euros is included. Here is a list of typical sources of income:
Net salary (including proportional bonuses or Christmas money)
Income from self-employment or a side business
Pension payments
Rental income from property ownership
Maintenance payments you receive
State benefits such as child benefit or parental allowance
Do not forget to also provide evidence of variable income over the past three years. This creates a solid basis for calculation. A loan for any purpose can be realised more easily this way. This complete recording is the first step towards realistic budget planning.
Step 2: List fixed and variable expenses accurately
Following the income, comes the detailed recording of all expenses. Banks differentiate between fixed costs and variable living expenses. Fixed costs are contractual, regular payments. This includes, for example, a monthly rent of 1,100 euros or existing loan repayments of 250 euros. Variable costs fluctuate but must be realistically estimated. Here is an overview for guidance:
Fixed costs: Rent, utilities (electricity, heating), insurance premiums, subscriptions, savings contributions.
Variable costs: Food, clothing, leisure, transport (car/public transport), vacation.
Many banks use a household flat rate for living expenses, often around 800 euros for the first person in the household. If your actual costs are lower, provide evidence of this with account statements from the last three months. If you consolidate multiple loans, it reduces the number of fixed installment payments. A precise listing prevents the bank from calculating overly high flat rates and assessing your creditworthiness more poorly.
Step 3: Determine the freely available amount
The actual household calculation is a simple comparison: total income minus total expenses. The result is your disposable income, from which the new loan installment must be paid. Let’s take an example: your income adds up to 3,500 euros, your expenses to 2,400 euros. This leaves you with 1,100 euros per month. The future installment for your desired loan should be easily covered by this amount. Banks always plan a safety buffer. A general rule of thumb is that the new loan installment should not exceed 50 to 60 percent of the disposable income. In our example, an installment of up to 550 euros would be realistic. With an online calculator for loan adjustments, you can explore various scenarios. This way, you can see how the installment affects your monthly budget.
Step 4: Avoid Common Mistakes in the Application Process
Even a well-prepared household budget can lose its effectiveness due to avoidable mistakes. Inaccurate or incomplete information quickly leads to queries or rejection. Be sure to navigate around the following three common sources of errors:
Forgetting irregular expenses: Annual insurance premiums (e.g., 480 euros for car insurance) or the utility bill must be calculated on a monthly basis (here 40 euros).
Underestimating living expenses: Unrealistic amounts for food or leisure of only 200 euros a month seem implausible and will be corrected by the bank.
Concealing existing liabilities: The bank checks your credit data and will find any loans or instalment payments not disclosed, which reduces your credibility.
Our expert tip: Keep a digital household book for at least three months before applying for a loan. This gives you realistic values 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 household budget online
In the digital age, you no longer have to laboriously create your household budget on paper. Most banks offer digital forms as part of the online application, where you can directly enter your figures. This significantly speeds up the process. An advantage is that these forms already query all relevant items, so you can't forget anything important. For preparation, you can also use simple Excel templates or budgeting apps. These tools help you gain an accurate overview of your finances over several months. Use the Online Identification Procedure to complete the application process entirely digitally. A well-prepared online household budget is the last building block for your successful loan application. Request an individual risk analysis now: Have your insurance situation checked for free and receive concrete optimization suggestions.
More useful links
Deutsche Bundesbank provides detailed analyses and assessments on the stability of the German financial system in its financial stability reports.
KfW informs about its support programmes for private individuals, covering various financing needs.
Wikipedia offers a comprehensive explanation of the credit agreement, its components, and legal aspects.
gesetze-im-internet.de provides the official legal text of § 488 BGB, which regulates the legal foundations of loan agreements.
FAQ
What additional documents does the bank need alongside the household budget?
The bank typically requires the last three payslips, account statements from the last three months, existing loan agreements, and proof of additional income such as rental contracts or pension statements.
What happens if I forget expenses in the household account?
If you forget any expenses, the bank will likely discover them by reviewing your account statements or your credit report. This could lead to inquiries or be perceived as an attempt to embellish your financial situation, which could jeopardize loan approval.
Is my overdraft taken into account in the household budget?
Yes, if you use your overdraft regularly, the bank will record the interest charges as a recurring expense in the household budget. Restructuring the overdraft could be a sensible option here.
How do I deal with irregular income like bonuses?
Irregular income such as annual bonuses or Christmas money should be substantiated with evidence from the last two to three years. The bank will then proportionally calculate these additional earnings toward your monthly income.
Can a partner be included in the household budget?
Yes, if you take out the loan jointly, both incomes and expenses will be recorded in a joint household account. This generally increases the chances of obtaining loan approval and better terms.
Does keeping a budget book improve my credit prospects?
Indirectly, yes. Keeping a household budget over several months can help you create an extremely accurate and realistic household account. This precision and the accompanying documentation can convince the bank of your financial reliability.
