Finance

Cashflow

Net income from property after all expenses and debt payments

Last updated: October 28, 2026
Editorially reviewed

Cashflow analysis is a core part of real estate investing in Germany. Whether you are acquiring your first rental apartment or building a multi-property portfolio, knowing how money flows in and out of your investment each month shows whether you can carry the property over the long term.

Understanding Cashflow in German Real Estate

In the context of German property investment, cashflow is the monthly or annual surplus (or deficit) remaining after all income is collected and all expenses are paid. Positive cashflow means your property puts money in your pocket each month, while negative cashflow requires you to contribute funds from other sources. Several German features affect cashflow: tenant protection law, Hausgeld obligations for apartment owners, and annuity loans in which each payment includes principal repayment (Tilgung).

Income side: Kaltmiete (cold rent), parking income, cellar or storage rent
Expense side: Mortgage payment (Zinsen + Tilgung), non-recoverable Hausgeld, property management fees, maintenance reserves, vacancy allowance
Tax effects: Depreciation (AfA) and interest deductions can create tax savings that improve after-tax cashflow
Positive cashflow provides a financial buffer against unexpected costs and vacancy periods
German investors often differentiate between pre-tax and after-tax cashflow

How to Calculate Monthly Cashflow Step by Step

Calculating cashflow for a German investment property requires a methodical approach that accounts for all income and expense components. Leaving out non-recoverable costs or underestimating maintenance makes the result look better than it is. Following a structured calculation gives you a realistic picture before committing to a purchase.

Step 1: Determine monthly Kaltmiete (cold rent), using current market rent or existing lease amount
Step 2: Add any supplementary income (parking spaces, storage units, advertising space)
Step 3: Subtract non-recoverable Hausgeld components (management fee, Instandhaltungsrücklage, owner-only costs)
Step 4: Subtract your monthly mortgage payment (Annuität = Zinsen + Tilgung)
Step 5: Subtract vacancy reserve (a share of annual rent depending on location)
Step 6: Subtract unit-specific maintenance reserve (beyond building reserves)
Step 7: The remaining amount is your pre-tax monthly cashflow

Strategies for Achieving Positive Cashflow in Germany

Where purchase prices are high relative to rents, positive cashflow takes deliberate planning. The higher the price per euro of rent, the larger the loan payment compared to the income. The following levers can tilt the equation in your favor without sacrificing property quality or tenant reliability.

Increase your equity contribution to reduce the mortgage payment and improve monthly surplus
Target properties with higher gross yields where rents cover financing costs more comfortably
Negotiate a lower Tilgung rate to reduce monthly outflows, though this slows equity buildup
Look for properties with below-market rent where legal rent increases can be implemented over time
Consider properties where value-add renovation can justify meaningful rent adjustments

Practical Example: Monthly Cashflow Calculation

You purchase a 70m² apartment in Düsseldorf for €250,000. Monthly Kaltmiete is €850. Your mortgage is €200,000 at 3.5% interest with 2% Tilgung, giving a monthly Annuität of €916.67. Monthly non-recoverable Hausgeld: €180 (management €30, reserves €100, insurance share €50). Vacancy reserve: €850 × 3% = €25.50/month. Unit maintenance reserve: €200/month. Monthly cashflow: €850 − €916.67 − €180 − €25.50 − €200 = −€472.17 (negative). Simplified tax view (building completed between 1925 and 2022): annual rent €10,200 minus interest €7,000, deductible Hausgeld items €960 (management and insurance) and 2% AfA on an assumed building share of €200,000 (€4,000) gives a rental loss of €1,760. At a 42% marginal tax rate this saves €739.20 a year, or €61.60 a month, so the after-tax cashflow is about −€410.57 a month.

Frequently Asked Questions

Is it normal to have negative cashflow on German investment properties?

It happens, especially where property prices are high relative to achievable rents. Negative pre-tax cashflow can be acceptable if you can carry the monthly top-up over the long term and the total return (cashflow + appreciation + equity buildup + tax effects) is positive. The key is ensuring the deficit fits your overall financial situation, including periods of vacancy or repairs.

How does Tilgung (principal repayment) affect my cashflow?

Tilgung directly reduces your monthly cashflow because it is part of your mortgage payment, but it simultaneously builds your equity in the property. A higher Tilgung rate (e.g., 3% instead of 1%) means lower monthly cashflow but faster debt reduction and lower total interest paid over the loan term. The right rate is a balance between cashflow and equity buildup. Every euro of Tilgung lowers your debt and so adds to your net worth.

Should I include tax benefits when calculating cashflow?

You should calculate both pre-tax and after-tax cashflow. Pre-tax cashflow shows the raw financial performance of the property and is useful for comparing investments. After-tax cashflow includes the impact of depreciation (AfA), deductible interest, and other tax benefits, giving you a more accurate picture of the actual money in your pocket. For example, at 2% AfA a building share of €200,000 gives €4,000 of deductible depreciation per year.