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Rent calculator

Combine base rent, service charges and heating costs into a gross rent and plan the cost per m2, per year and over a chosen period with rent increases.

Available

Inputs

Enter values

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Miete und Fläche

EUR
m²

Laufende Kosten

iBetriebskosten ohne Heizung, meist als Vorauszahlung.
EUR

Betriebskosten ohne Heizung, meist als Vorauszahlung.

iHeiz- und Warmwasserkosten, meist als Vorauszahlung.
EUR

Heiz- und Warmwasserkosten, meist als Vorauszahlung.

EUR
EUR

Zeitraum und Einmalkosten

iZum Beispiel Kaution und Umzug.
EUR

Zum Beispiel Kaution und Umzug.

iOptional; 0 = nur monatliche und jährliche Kosten.
Jahre

Optional; 0 = nur monatliche und jährliche Kosten.

iOptional für Staffel- oder Indexmieten.
%

Optional für Staffel- oder Indexmieten.

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Explanation

How Rent calculator works

The rent calculator combines all ongoing housing costs into a gross rent and projects them onto square metres, the year and a freely chosen period. This makes offers and your own burden comparable.

Gross rent and cost per m2

Gross rentKaltmiete + kalte Nebenkosten + Heizkosten + Stellplatz + Sonstiges

All ongoing monthly costs.

Cost per m2Warmmiete / Wohnfläche

A key figure from your entries, not a rent-index value.

Period considered

Total costsSumme der jährlich steigenden Warmmieten + einmalige Kosten

Each annual rent grows by the entered increase.

Practice

Practical examples

Gross rent of a three-room flat

Base rent EUR 850, 72 m2 living area, EUR 180 cold service charges, EUR 110 heating costs, EUR 45 parking space, EUR 0 other.

Result: Gross rent of EUR 1,185 per month, around EUR 16.46 per m2 and month, annual costs of EUR 14,220.

Five years with rent increases

Gross rent as above, period considered 5 years, 2 % annual rent increase, EUR 2,550 deposit and EUR 1,200 move as one-off costs.

Result: Total costs over five years of around EUR 77,750 including one-off costs; on average about EUR 1,233 per month.

Notes

Common mistakes

  • Only the base rent compared

    Two flats are measured by the base rent alone.

    Always compare the gross rent including service and heating costs.

  • Deposit and move forgotten

    Only the ongoing rent is planned.

    Include one-off costs such as the deposit and the move in the total costs.

  • Advance payment read as final cost

    Service-charge advance payments are understood as final costs.

    The annual operating-cost statement may result in back payments or credits.

FAQ

Frequently asked questions

What is the difference between base rent and gross rent?

The base rent is the pure rent for the flat. The gross rent adds cold service charges and heating costs and corresponds to the actual monthly burden.

Which costs go into the gross rent?

Base rent, cold operating costs under the Operating Costs Ordinance (Betriebskostenverordnung), heating costs and optionally a parking space and other ongoing costs. One-off costs are shown separately.

How is the price per square metre calculated?

The calculator divides the gross rent by the living area. In addition, the base rent per m2 is shown, because rent indexes usually use the base rent per m2.

Does the calculator use a rent index?

No. The calculator does not pretend to reflect local rent indexes (Mietspiegel) or market prices. All values are your inputs; the price per m2 is only a key figure derived from your own entries.

How are the deposit and the move taken into account?

One-off costs such as the deposit or the move flow undistributed into the total costs of the period considered, but do not change the monthly gross rent.

How does the annual rent increase work?

For each year of the period, the annual rent is increased by the entered percentage. This shows how graduated (Staffelmiete) or index-linked rents add up over time.

Why are service charges and heating costs separate?

Heating costs are usually billed by consumption under the Heating Costs Ordinance (Heizkostenverordnung), whereas cold service charges are allocated by a distribution key. Entering them separately keeps both blocks visible.

Are these advance payments or actual costs?

As a rule you enter advance payments. The actual service charges only emerge from the annual operating-cost statement; back payments or credits are not reflected here.

How do the annual costs arise?

The gross rent per month is multiplied by twelve. For a period with an increase, the calculator sums the individual, rising annual rents.

How much rent is reasonable?

A common guideline is that the gross rent should not exceed about a third of net income. That is a rule of thumb, not a fixed limit, and does not replace individual household planning.

Is the result binding?

No. The calculator provides planning orientation based on your entries. The tenancy agreement and the operating-cost statement are decisive.

Limits

Limitations

  • All amounts are user inputs; no rent indexes or market prices are stored.
  • Back payments or credits from the operating-cost statement are not reflected.
  • No legal or tenancy advice; the tenancy agreement and the statement are decisive.

Sources

Sources and references

  • § 556 BGB – Vereinbarungen über BetriebskostenBundesministerium der Justiz / Bundesamt für Justiz

    Official basis for allocating operating and service charges in residential tenancies.

    View source
  • Betriebskostenverordnung (BetrKV)Bundesministerium der Justiz / Bundesamt für Justiz

    Official list of the allocable types of operating costs as the basis of the service-charge items.

    View source
  • Verordnung über Heizkostenabrechnung (HeizkostenV)Bundesministerium der Justiz / Bundesamt für Justiz

    Official basis for the consumption-based allocation of heating and hot-water costs.

    View source