Nebenkostenabrechner

Guido Gottwald

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About this app

Utility billing made easy – legally compliant for Germany, Austria, and Switzerland. Are you a landlord and want to create your utility bills correctly, quickly, and without expensive property management? Rent Calculator is the app that helps you do just that – whether for a single apartment or a large property portfolio.

Rent Calculator is the app that helps you do exactly that – whether for a single apartment or a large real estate portfolio. This is what Rent Calculator can do:

• Create legally compliant utility bills according to German Civil Code (BGB) §556, German Operating Costs Ordinance (BetrKV), Austrian Tenancy Act (MRG), and Swiss Code of Obligations (OR)

• All 17 chargeable cost categories according to the German Operating Costs Ordinance are included

• Heat cost statements according to the German Heating Costs Ordinance (HeizkostenV) with correct allocation of fixed and consumption costs

• Generate professional PDF statements with all mandatory information

• Multiple allocation keys: living space, number of occupants, consumption, residential units, or co-ownership share

• Automatic deadline monitoring – never miss the 12-month deadline again

• Daily pro-rata calculation in case of tenant changes

• Correctly balance advance payments and calculate additional payments or credits

• Meter reading management for water, heating, and electricity

Country-specific for the DACH region (Germany, Austria, Switzerland):

🇩🇪 Germany: German Civil Code (BGB) §556, German Operating Costs Ordinance (BetrKV), German Heating Costs Ordinance (HeizkostenV)

🇦🇹 Austria: Austrian Tenancy Act (MRG) §§21-24 Heating Cost Billing Act (HeizKG)

🇨🇭 Switzerland: OR Art. 257a-257b, VMWG Art. 4-8, correct CHF billing

The right option for every size:

Basic – Ideal for beginners with one property and up to 5 units. All the essential functions for accurate

billing.

Standard – For experienced landlords with up to 10 properties and an unlimited number of units. Extended features for
efficient work.

Premium – For professionals without limits. Unlimited properties, DATEV export for your tax advisor, multi-user access, and

API integration.

Why Rent Billing Software?

✓ Usable offline – Your data belongs to you, even without an internet connection

✓ Cloud sync – Seamlessly switch between smartphone, tablet, and desktop

✓ GDPR-compliant data protection – Server location in the EU, no sharing with third parties

✓ Calculation accurate to the cent – ​​No rounding errors in billing

✓ Vacancy costs are automatically assigned to the landlord

✓ Documented receipt access for tenants

✓ Regular updates for legal changes

Save time and money:

Professional property management can easily cost €20–30 per unit per month. With Rent Calculator, you create your

billing yourself – legally compliant, transparent, and in a fraction of the time. Buy once, use it permanently –

no subscription, no hidden costs.

It's that easy:

1. Create property and units

2. Assign tenants and leases

3. Record costs and select allocation keys

4. Enter meter readings

5. Generate billing and export as a PDF – done!


Rent Calculator Perfect for private landlords, homeowners' associations, and small property management companies throughout the DACH region (Germany, Austria, Switzerland).

For questions or suggestions, please contact us at [e-mail] – we look forward to your feedback!

What’s new

Anmeldung vereinfacht: Sie erhalten jetzt einen Code per E-Mail und geben ihn direkt in der App ein. Das Hin und Her über einen Link entfällt.

Lizenz lässt sich nun vom Gerät entfernen – praktisch beim Gerätewechsel oder wenn Sie ein anderes Konto nutzen möchten.

Hinweis- und Fehlermeldungen sind im dunklen Design wieder lesbar.

E-Mails mit dem Lizenzschlüssel kommen zuverlässig an.