Base rent

Base Rent - Base rent (also known as net base rent or basic rent) is the rent amount for the use of a residential or commercial unit, excluding all utility costs. It serves as the key benchmark for rent indices, rent increases, and the application of rent control measures.

What exactly does base rent mean?

Base rent covers only the fee for the use of the rental space. Operating costs such as heating, water, garbage collection, property tax, or building insurance are not included-they are billed separately as utility costs or operating costs. The sum of the base rent and all ancillary costs equals the total rent (gross rent), i.e., the total amount that tenants must actually pay each month.

In practice, the distinction between base rent and gross rent is of significant legal importance. A city’s qualified rent index-including the Nuremberg rent index-always lists the local comparative rent as the net base rent per square meter. If landlords demand a rent increase to the local comparative rent (Section 558 of the German Civil Code), only the base rent may be raised. Similarly, the rent control provision (Section 556d of the German Civil Code) applies to the net base rent for new leases.

In addition to the traditional base rent, there are other rental models based on the base rent. With index-linked rent (Section 557b BGB), the base rent is linked annually to the consumer price index of the Federal Statistical Office-an adjustment to the rent index is then not required. With graded rent (Section 557a BGB), fixed rent increases are agreed upon in the lease agreement, so that the base rent rises by a specific amount at set intervals. Both variants offer landlords and tenants planning security, but differ in their flexibility and adjustment mechanism.

The amount of the base rent is generally agreed upon freely between the parties to the lease agreement. In areas with a tight housing market-such as in many districts of Nuremberg-the rent cap applies, however: The base rent for new leases may not exceed the local comparative rent by more than 10%.

Base Rent as the Basis for Landlord Decisions

For landlords, correctly determining the base rent is economically crucial. It directly determines the rental yield and influences the market value of the property, as investors often calculate the purchase price as a multiple of the annual net base rent (rent multiplier).

The security deposit is also calculated based on the net base rent: a maximum of three months’ base rent may be required as security (§ 551 BGB). Setting the base rent too low not only means forgoing current income but also limits the permissible security deposit amount and makes future rent increases more difficult-since the cap allows for a maximum increase of 20% (15% in tight markets) over a three-year period.

Basic Rent and Tax Law: The 66% Threshold

A critical threshold for landlords is the 66% limit in tax law (Section 21(2) EStG): If the agreed-upon basic rent is less than 66% of the local comparative rent, the lease is considered discounted. In this case, income-related expenses (interest, depreciation, administrative costs, maintenance) are only partially recognized for tax purposes-in proportion to the ratio of the actual rent to the market rent. Landlords who provide housing at a reduced rate to family members or acquaintances should always keep this threshold in mind.

If the base rent is between 66% and 100% of the market rent, all income-related expenses are considered fully deductible. For landlords with a significant tax interest in deductibility (e.g., high interest burden, large depreciation amounts), falling below the 66% threshold is particularly costly.

Practical Tip for Property Owners in Nuremberg and Franconia

The current rent index for the city of Nuremberg shows significant variations in the local comparative rent depending on location, year of construction, and amenities. In sought-after neighborhoods such as St. Johannis, Gostenhof, or the Südstadt, net base rents for existing apartments are significantly above average, while more moderate rates apply in outlying areas such as Langwasser or Kornburg.

We recommend that landlords in the Nuremberg metropolitan area review the base rent before each new lease based on the current rent index and comparable listings. This ensures that the rent is set in line with market conditions while also complying with the requirements of the rent control law. Particularly relevant: Landlords who have long-term tenants and have not adjusted the rent for a long time can implement a gradual adjustment to the market rent within the cap limit. Our team is happy to assist you with professional rent determination and the preparation of legally compliant rent increase notices.

Frequently Asked Questions

What is the difference between base rent and gross rent?

Base rent (net base rent) is the basic rent excluding utilities. The gross rent (gross rent) additionally includes all operating costs-that is, heating costs, water, garbage collection, building insurance, property tax, and other apportionable items in accordance with the Operating Costs Ordinance. For tenants, the gross rent is the actual monthly expense, while landlords and rent indices always use the net rent as a benchmark.

How is the local comparative rent determined?

The local comparative rent is determined based on the qualified rent index, which the City of Nuremberg compiles regularly. Factors such as neighborhood, year of construction, apartment size, and standard of amenities are taken into account. Landlords may alternatively substantiate the comparative rent through an expert appraisal or by referencing at least three comparable tenancies. However, the rent index is the instrument most frequently used in practice and recognized by the courts.

Can the base rent be increased freely for existing lease agreements?

No. For existing lease agreements, an increase in the base rent is only permitted under certain legal conditions. The most common form is an adjustment to the local comparative rent (Section 558 of the German Civil Code), which requires a waiting period of 15 months following the last increase and compliance with the cap limit. In addition, increases are possible following modernization measures (Section 559 of the German Civil Code) or in cases of contractually agreed index-linked or graduated rent.

What advantages does an index-linked rent offer over a standard base rent?

With an index-linked rent, the base rent is automatically linked to the consumer price index-if consumer prices rise, the rent increases accordingly. This is advantageous for landlords because they can make regular adjustments without having to go through the time-consuming rent increase procedure under § 558 BGB. For tenants, an index-linked rent provides planning security, as increases are tied to an objective criterion. However, please note: In the case of index-linked lease agreements, a separate rent increase based on the local comparative rent is excluded.

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