HeizkostenV: 31 December 2026 deadline — who pays, how tenant rebates work, and four notary clauses to allocate upgrade risk

What the law requires (short)

The federal Heizkostenverordnung (HeizkostenV) requires that devices used to measure heating and hot‑water consumption be “remote‑readable” if installed after 1 December 2021, and that non‑remote devices installed earlier be retrofitted or replaced by 31 December 2026. The regulation defines “remote‑readable” as readable without access to individual rented units. See § 5(2)–(3) HeizkostenV for the legal text. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

The rule also imposes information duties: where remote‑readable equipment exists, landlords must give consumption and billing information at specified intervals (§ 6a). The interoperability requirement for devices installed from 1 December 2022 and technical‑security rules are also in § 5. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

Who legally must arrange and who can be charged

The legal duty to equip the building and to record consumption lies with the building owner (Gebäudeeigentümer). § 4 and § 5 of the HeizkostenV place the obligation to provide the measuring equipment on the owner; the owner must fit the necessary devices. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

That said, the regulation recognises cost‑sharing mechanisms. If the owner intends to procure the equipment by renting it or otherwise providing it for use, he must tell the users in advance and list the resulting costs; the measure is inadmissible if a majority of users objects within one month. Moreover, the rules on distributing heating‑operation costs explicitly include the costs of renting or using measuring equipment, so those running costs (rent, reading and billing charges) can be allocated across users under the normal cost‑distribution rules (§ 7). In short: the owner must ensure compliance, but operational costs (including rental) can be passed on subject to the notification/majority veto rule. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

Practical implication for buyers: a seller who has not complied by 31 December 2026 remains the party with the statutory duty. Contractually, however, buyer and seller can re‑allocate financial risk by warranties, price adjustments or escrow at notarisation (clauses below).

What tenants may deduct and how to calculate it

Section 12(1) of the HeizkostenV gives tenants two separate statutory reduction rights. If heating or hot‑water costs are not billed according to consumption at all, a tenant may reduce their billed share by 15 %. If the owner failed to install remote‑readable measuring devices as required by § 5(2) or § 5(3), the tenant may reduce their billed share by 3 %. The same 3 % reduction applies when the owner does not provide the required consumption/billing information under § 6a. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

How to apply the rebate in practice: the tenant’s billing position is reduced by the stated percentage of the tenant’s heating‑/hot‑water charge on the invoice. Example (illustrative): if a tenant’s heating charge is €600 for the year, a 3 % statutory reduction reduces the tenant’s billed amount by €18 (3 % of €600). This is a statutory deduction right; in disputes courts will examine whether the statutory conditions apply and for which billing periods. Always document notices and invoices carefully and consult local counsel or the notary if the issue arises after a sale.

Four notary clauses investors and buyers can use

Below are pragmatic clause templates. These are drafting suggestions only — have a German notary or Rechtsanwalt review and adapt them to the deal and the property type. Do not treat these as personalised legal advice.

1) Seller warranty of compliance and evidence “The seller warrants that, as of the date of signing, all measuring devices required under the Heizkostenverordnung (HeizkostenV) have been installed or retrofitted in accordance with § 5, and hands over supporting documentation (invoices, certificates, service reports). If the seller cannot deliver such proof, the seller shall bear the costs to achieve compliance.”

Purpose: forces seller to prove compliance at signing and links failure to a seller cost obligation. Cite: § 5 HeizkostenV. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

2) Escrow / holdback for retrofit “If, on transfer, proof of full compliance is not provided, the buyer shall withhold €[estimated‑cost] in escrow. The escrow shall be released upon presentation of invoices and proof of installation meeting § 5 requirements or upon final court decision.”

Purpose: money on deposit funds retrofit after closing and avoids post‑closing disputes. Estimate conservatively and let the notary hold funds.

3) Costs‑allocation clause (contractual reallocation) “The parties agree that, notwithstanding statutory obligations, the parties shall bear retrofit costs as follows: seller [x %] / buyer [y %], and the party liable shall reimburse tenants for statutory Kürzungen under § 12 insofar as those Kürzungen relate to the period before transfer.”

Purpose: contractual allocation of economic risk; be explicit about time windows and tenant rebate exposure. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

4) Tenant‑information and majority‑veto confirmation “The seller confirms in writing that, where applicable, users were timely notified under § 4(2) about any plan to procure measuring equipment by rental and that no majority objection was recorded; copies of the notices and responses shall be delivered at signing.”

Purpose: preserves buyer’s position on whether a rental‑pass‑through is permissible (the majority veto can block a rental pass‑through). Cite: § 4(2). ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))

Final note: the statute, its deadlines and technical rules are the controlling sources; the evaluation prepared for the ministry contains empirical figures about cost impacts and acceptance of remote reading. For transaction risk allocation rely on notarial escrow and precise seller warranties, and consult a German notary or specialised real‑estate lawyer before signing. ([bundeswirtschaftsministerium.de](https://www.bundeswirtschaftsministerium.de/Redaktion/DE/Evaluationen/Gesetze-Verordnungen/evaluierung-der-heizkostenverordnung-zur-ausstattung-zur-verbrauchserfassung.pdf?__blob=publicationFile&v=10&utm_source=openai))

Practical due diligence checklist

Before signing, demand: (1) copies of invoices and installation/interop certificates for all measuring devices; (2) copies of notices under § 4(2) to tenants and any responses (majority objections); (3) the last heating cost statements and any tenant claims under § 12; (4) a written schedule and cost estimate to complete any required retrofit. Verify technical conformity with § 5 and keep proofs in the notarial file. ([gesetze-im-internet.de](https://www.gesetze-im-internet.de/heizkostenv/BJNR002610981.html))