Your German utility bill explained: what the Nebenkostenabrechnung really says

Short answer

Your German utility bill is the Nebenkostenabrechnung: a yearly statement in which your landlord splits the running costs of the building between all tenants and settles them against your monthly advance payments. It covers costs such as property tax, water, heating, waste collection, cleaning, garden care and building insurance. For each item, it shows the total for the building, the key used to split it and your share. At the end, your advance payments are deducted. If you paid too little, you owe a back payment (Nachzahlung). If you paid too much, you get a credit (Guthaben). The legal name is Betriebskostenabrechnung, and English speakers also call it a service charge statement.

Rent in Germany usually has two parts. The base rent (Kaltmiete or Nettokaltmiete) pays for the flat itself. On top of that, you pay a monthly advance for the running costs of the building (Nebenkostenvorauszahlung or Betriebskostenvorauszahlung). Base rent plus advance payments is often called Warmmiete, especially when heating is included.

Your landlord does not know the exact costs in advance. So you pay an estimate every month, and once a year your landlord adds up what the building really cost. That is the Nebenkostenabrechnung. It only exists because your rental contract (Mietvertrag) says so: the law allows landlord and tenant to agree that the tenant bears the operating costs.

What counts as operating costs is defined in the Operating Costs Ordinance (Betriebskostenverordnung, BetrKV). The key word is “laufend”, meaning recurring:

One-off costs such as a new roof, a broken heating pump or a lawyer's fee for the landlord are therefore not operating costs. Neither are management fees or repairs: § 1 (2) BetrKV excludes them expressly. Some contracts also agree a flat fee (Pauschale) instead of advance payments. Then there is no yearly statement, and the flat fee is all you pay.

Many expats expect the German “utility bill” to cover everything. It does not. These costs usually come separately, from your own contracts:

• Electricity for your flat (Strom). In most rentals you choose your own supplier and pay them directly. Only shared electricity, such as stairwell lighting, appears in the Nebenkosten as Allgemeinstrom.
• Gas for a flat-level boiler (Gasetagenheizung).If your flat has its own gas boiler, you often have your own gas contract. Then heating is not in the landlord's statement at all, apart from things like the boiler service or the chimney sweep, if your contract says so.
• Internet, phone and mobile. Always your own contracts.
• Broadcasting fee (Rundfunkbeitrag). Charged per household by the Beitragsservice, never through your landlord.
• Cable TV. Since 1 July 2024, fees for cable TV may no longer be passed on through the Nebenkosten. If they still appear for the time after June 2024, ask why.
• Household contents and liability insurance.Your own policies. The building insurance in your statement is the landlord's policy for the building.

These are the words you will find on almost every German utility bill. Keep this list open while you read yours.

Almost every statement has the same structure: a cover letter with the result, a table of cost items, and often a separate heating statement. Each line of the table follows one simple formula: total costs ÷ total of the key × your value. Here is a simplified example with made-up numbers for a 70 m² flat with two people in a building with 1,000 m²:

Read your own statement the same way. For each line, check three things: is the total plausible, is the key right, and is your value right (your floor area, your number of persons, your meter reading)? A wrong total floor area or a wrong number of persons changes many lines at once.

If the contract does not say otherwise, costs are split by floor area (§ 556a (1) BGB). Costs that depend on recorded consumption, such as water with meters, must be split in a way that reflects consumption. The cover letter usually also names a new monthly advance payment. Your landlord may adjust it after a statement to a reasonable amount (§ 560 (4) BGB).

With central heating, heating and hot water are usually billed in their own statement. It is often prepared by a metering service company (Messdienst) such as ista, Techem, Brunata or Minol on behalf of your landlord. The result then appears as one line (“Heizkosten” or “Heizung und Warmwasser”) in the main statement.

Special rules apply here, set by the Heating Costs Ordinance (Heizkostenverordnung, HeizkostenV). At least 50 % and at most 70 % of the heating costs must be split by recorded consumption (§ 7 HeizkostenV), the same applies to hot water (§ 8 HeizkostenV). The rest is split by floor area. If heating is not billed by consumption although it should be, you may reduce your share by 15 % (§ 12 HeizkostenV). Since 2023, landlords also bear part of the CO₂ costs, depending on how much CO₂ the building emits.

The German Federal Court of Justice (Bundesgerichtshof, BGH) has set out the minimum content of a statement for a building with several flats (judgment of 17 November 2004, VIII ZR 115/04, and later decisions). If one of these is missing, the statement is formally defective:

• A list of the total costs for each item
• The allocation key used, explained where it is not obvious
• The calculation of your share
• The deduction of your advance payments

The difference matters. A formally defective statement does not make a back payment due, and if your landlord only fixes it after the 12-month deadline, the back payment is lost. A statement that is formally fine but contains wrong figures is only wrong in content. That can be corrected, but after the deadline generally not to your disadvantage.

Two 12-month deadlines apply, both in § 556 (3) BGB:

Example: for the calendar year 2025, the statement must reach you by 31 December 2026. If it arrives on 10 November 2026, you can object until 10 November 2027. What counts is when the statement reaches you, not the date on the letter.

In the statements we check, we often see the same kinds of errors. Most of them cannot be spotted from the summary page alone:

• Costs that are never allowed

  Management fees (Verwaltungskosten), repairs (Reparaturen, Instandhaltung) or bank charges hidden in items such as caretaker or garden care.

• Costs not agreed in your contract

  Items your rental contract does not mention, especially under “Sonstige Betriebskosten” (other operating costs).

• Wrong key or wrong area

  A total floor area that is too small, your flat counted too large, or a wrong number of persons. This affects every item that uses the key.

• Heating not by consumption

  Heating or hot water split only by floor area, or hot water estimated by formula instead of measured.

• Advance payments missing

  Not all of your monthly advance payments are deducted, for example after a rent change.

• Wrong period

  You moved in or out during the year but are charged for 12 months.

1. 1

   Check the date and the period

   When did the statement reach you, and which period does it cover? If it arrived more than 12 months after the period ended, a back payment is generally excluded.

2. 2

   Check the formal minimum

   Total costs, key, your share and your advance payments must all be there. Lump sums without a breakdown are a warning sign.

3. 3

   Compare with your rental contract

   Only cost types that are agreed in your contract and listed in § 2 BetrKV may be charged.

4. 4

   Check your values

   Your floor area, the total floor area, your number of persons and your move-in date. Compare with last year's statement.

5. 5

   Look at the heating statement separately

   Is heating split by consumption? Are any readings estimated? Is the landlord's CO₂ share shown and credited?

6. 6

   Note large jumps

   A big increase is not an error by itself, but it shows you where to ask for the invoices.

You do not have to accept a statement you do not understand. These are your most important rights as a tenant:

• Inspect the invoices (Belegeinsicht). Your landlord must let you see the invoices behind the statement on request, and may provide them electronically (§ 556 (4) BGB). As long as a justified request is refused, you do not have to pay the back payment (BGH, 7 February 2018, VIII ZR 189/17).
• Object in writing. Name the items and the reason. You have 12 months after receipt.
• Pay only the undisputed part. Or pay with a note “unter Vorbehalt” (under reservation). Paying does not mean you accept the statement (BGH, 12 January 2011, VIII ZR 296/09).
• Get help.A tenants' association (Mieterverein), a lawyer, or a check by nebify with a ready-made letter.