Choosing Allocation Keys: Tenant Rights in Germany

Utilities & Service Charge Billing 2 min read · published September 07, 2025

As a tenant in Germany, the chosen allocation key can significantly affect the amount of a back payment on your utility bill. This article explains in plain language what an allocation key is, when and how back payments arise, and which steps you as a tenant can take to identify errors or resolve disputes. We explain basic terms, show typical checkpoints in the statement, and name deadlines, courts and forms that are relevant in case of conflict. The goal is to give you concrete actions for handling utility cost statements safely so you can better avoid financial surprises and assert your rights in Germany.

What an allocation key is and why it matters

The allocation key determines how operating costs are distributed among tenants. Common keys are per person, by living area, or as a share for multiple flats. An incorrect or non-agreed key can lead to an excessive back payment. Check your lease to see which key is specified and whether it matches the listed operating costs.

A clearly worded allocation key reduces disputes over back payments.

What to check on the utility cost statement

  • Compare total amounts with the previous year and check for unusual increases.
  • Verify whether the allocation key stated in the lease was applied.
  • Request receipts, such as invoices or meter readouts, if amounts are unclear.
  • Watch the deadlines: generally you should review statements within 12 months and, if necessary, object.
Keep all statements and payment receipts for at least three years.

If a back payment is demanded

First check formal points: was the agreed allocation key used, are all items listed separately, and are there calculation errors or misallocated cost types? Mark each unclear item and ask the landlord for written clarification. Note the request and the date.

Object in writing within a reasonable period to preserve your rights.

Jurisdiction and legal bases

Tenant disputes over operating costs and back payments are usually heard first in local courts (Amtsgericht); higher instances are regional courts and possibly the Federal Court of Justice. Legal bases include the BGB (rental contract, obligations) and the Operating Costs Ordinance (BetrKV). For lawsuits or payment proceedings, the Code of Civil Procedure (ZPO) applies.[1][2][3]

Forms and correspondence (practical)

  • Complaint form / claim: Use the appropriate form or a properly drafted claim under the ZPO for eviction or payment claims.
  • Letter of objection: Send a clear, dated letter with reasons and a requested response deadline.
Early written contact with the landlord resolves many misunderstandings without court involvement.

Help and Support / Resources


  1. [1] Bürgerliches Gesetzbuch (BGB) - Gesetze im Internet
  2. [2] Betriebskostenverordnung (BetrKV) - Gesetze im Internet
  3. [3] Zivilprozessordnung (ZPO) - Gesetze im Internet
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights Germany

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for tenants everywhere.