Nettokaltmiete, Bruttokaltmiete, Inklusivmiete: Why the Same Figure Isn't the Same Thing

Two apartment listings with an identical Nebenkosten figure can, in reality, cover completely different services. The reason lies in the different rent pricing models that exist side by side on the German market.

Nettokaltmiete plus advance payment: the standard model

In the most common model, the Nettokaltmiete — the pure usage fee for the apartment — is shown separately from a monthly Nebenkosten advance payment. That advance payment gets reconciled against actual costs at year end in the Nebenkostenabrechnung, resulting in either a Nachzahlung (additional payment) or a credit. This model is transparent, since both figures are visible separately, but it does mean tenants need to be ready for a possible additional payment.

Bruttokaltmiete or Teilinklusivmiete: a hybrid model

Under Bruttokaltmiete, also called Teilinklusivmiete, certain cold operating costs like water or waste collection are already folded into a single total, while heating and hot water are still billed separately. This model shows up less often, but can appear in furnished apartments or shared rooms, where the landlord bundles part of the recurring costs into a flat sum.

Inklusivmiete or Bruttowarmmiete: everything in one figure

Inklusivmiete, also called Bruttowarmmiete, covers cold rent and all operating costs, including heating, in a single fixed amount. For the items included, the annual Nebenkostenabrechnung disappears entirely — but in exchange, the landlord can't simply demand a Nachzahlung if operating costs rise. Adjusting the total is only possible under the conditions set out in § 560 BGB, for example when an increase is agreed and justified in the rental contract.

Why this matters when comparing offers

A figure of €400 in Nebenkosten can already cover everything, including heating, under an Inklusivmiete — while the same figure under a pure advance-payment model is only an estimate that can still lead to a Nachzahlung at year end. Before comparing two offers, it's worth asking which of the three models actually underlies each rental contract.

What to look for in your rental contract

Your Mietvertrag should clearly state whether you're dealing with an advance payment or a flat rate, and if it's a flat rate, which specific cost types it includes. If that's missing, it's worth asking the landlord before signing, to avoid misunderstandings once the statement arrives.

If you want to check whether your own Nebenkosten figure, whichever model it comes from, looks reasonable, our guide on how high Nebenkosten can legally run relative to rent is a good starting point. For what has to be spelled out in your rental contract regardless of the model, see our guide to Nebenkosten in the Mietvertrag. And for the difference between cold rent and warm rent more broadly, check our complete guide to Warmmiete.

Frequently Asked Questions

What's the difference between Nettokaltmiete and Inklusivmiete?

Nettokaltmiete is the pure apartment rent without Nebenkosten, while Inklusivmiete bundles cold rent and all operating costs, including heating, into one fixed figure.

What is a Bruttokaltmiete?

A hybrid model where certain cold operating costs are already included in the total, but heating and hot water are still billed separately.

Do I have to expect a Nachzahlung under an Inklusivmiete?

No, for the cost types included in the fixed figure, the annual statement disappears entirely; an adjustment is only possible under the conditions of § 560 BGB.