Every renter in Germany receives a Nebenkostenabrechnung (operating cost statement) once a year. It often results in an unexpected additional payment or, occasionally, a refund. Here is what it contains and how to read it.
What Nebenkosten Are
Nebenkosten (additional costs / Betriebskosten) are the costs of running the building that landlords are legally entitled to pass on to tenants. They are paid as a monthly advance (Vorauszahlung) included in the total rent (Warmmiete = Kaltmiete + Nebenkosten), then reconciled annually. The legally permissible Nebenkosten (§2 BetrKV): central heating costs, hot water, cold water, sewage, waste disposal, building insurance, general electricity for common areas, elevator maintenance, cleaning of common areas, gardening for common property, and the doorbell/intercom system maintenance. Not permissible in Nebenkosten: repairs, management fees beyond administration, insurance covering only the landlord’s liability, and vacancy-related costs.
Reading the Statement
The Nebenkostenabrechnung must be delivered within 12 months after the end of the billing period (Abrechnungszeitraum, usually the calendar year). After 12 months, the landlord loses the right to demand additional payment — but you retain the right to any refund. The statement must list: each cost type separately, the total building cost, the distribution key (Verteilerschlüssel — how costs are split between apartments, typically by floor area proportion), your apartment’s share, your advance payments made, and the balance (Nachzahlung if you owe more, Guthaben if you are owed a refund). Heating costs (Heizkosten) are regulated separately: they must be split between a consumption component (at least 50–70% based on meter reading) and a fixed component — tenants who heat less pay less, tenants who heat more pay more.
What to Check
Key things to verify: Was the statement delivered within the 12-month deadline? Are all cost types listed individually (lump-sum billing is not permitted)? Is the distribution key clearly stated and consistent with your rental contract? Are the costs listed ones that are legally permitted? Is the billing period correct (should cover exactly 12 months, pro-rated for partial years)? Are your advance payments correctly credited? Common errors: costs included that are not legally permissible (repairs, management costs), incorrect distribution key, heating costs not split between consumption and fixed components. You have 12 months after receipt to dispute the statement in writing. If you discover an error, write a Widerspruch (written objection) stating the specific error and requesting correction.
The Typical Outcome
Most Nebenkostenabrechnung statements result in an additional payment (Nachzahlung), not a refund. The reason: landlords typically set conservative monthly advances to avoid refund obligations, and energy costs have risen significantly in Germany since 2021. The average additional payment in Germany in recent years has been €200–350 per household per year. After receiving the statement, you can also request that your monthly advance be adjusted upward to prevent a large payment next year — landlords can require this if the advance significantly underestimates actual costs. The refund case (Guthaben): if your advance payments exceeded the actual costs, the landlord must pay the difference within 30 days of the statement.
