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Three district‑heat contract clauses that will bite foreign buyers after the Wärmenetzpaket (Eckpunkte, 26 Aug 2026)
After the federal Wärmenetzpaket Eckpunkte (26 Aug 2026), district‑heat contracts may carry new price, indexation and transfer risks for purchasers. How to read price‑review triggers, index formulas and assignment/termination language before notarisation.
What changed on 26 August 2026 — the Eckpunkte in short
On 26 August 2026 the Federal Cabinet published the Eckpunkte for a Wärmenetzpaket setting the framework for a new Wärmenetzgesetz. The document keeps the basic structure of the current AVBFernwärmeV (the federal general terms for district‑heat supply) but explicitly permits price‑change clauses that refer to the supplier's actual costs rather than to a public index. The Eckpunkte also propose a mandatory federal price‑transparency platform, an ex‑post price supervision function at a federal body, limits on customers' special‑termination rights and new rules on performance adjustment and compensation for customer‑specific connection investments. These are policy decisions that will be turned into statutory text in the coming legislative process; the Eckpunkte are the Cabinet position of 26 Aug 2026. (Bundeswirtschaftsministerium, 26 Aug 2026).
Clause 1 — the price‑review (price‑change) clause: timing, notices and customer rights
The AVBFernwärmeV already requires that price‑change clauses disclose the calculation factors in an understandable form and separately show the percentage of the factor covering fuel costs (§24 AVBFernwärmeV). It also prescribes timing: where a supplier exercises a contractual price‑adjustment right after a supplier‑to‑supplier gas price rise, the adjustment may take effect no earlier than two weeks after the supplier sends a reasoned text notice, and the customer has a four‑week window to declare an extraordinary termination taking effect no later than one year after the change. The Eckpunkte keep that framework but make two practical changes that matter to buyers: (1) suppliers may present cost‑linked formulas that are not index‑based, and (2) a federal price‑transparency portal and ex‑post price review are to be introduced. For a buyer about to sign, check every notification trigger ("if X happens then price increases by Y%"), the exact notice text requirement, the effective date formula and the buyer's termination windows. Ask the seller for copies of any price‑change notices sent in the last 24 months and for the supplier’s standard wording; do not rely on a generic statement in the purchase contract that "prices follow the supplier's conditions."
Clause 2 — indexation vs. cost‑linking: what the Eckpunkte permit and why it matters
Under the current AVBFernwärmeV many suppliers use a publicly‑published heat‑price index or a mix of indices (fuel, consumer prices) inside the price formula. The Eckpunkte explicitly permit an alternative: a price‑change clause that "orients itself on the supplier’s actual costs" rather than a statistical index. That change makes forecasting harder. An index ties future bills to a transparent, published series; a cost‑linked clause can reference internal input prices, pass‑through rules, allocation of overheads and supplier margins. For a foreign buyer this raises three practical questions to insist on in the notarisation file: the exact arithmetic formula (show every numerator and denominator), the supporting accounts or data the supplier must publish on request, and any caps, floors or review triggers (for example a maximum increase per year). Where the contract refers to "costs" without defining them, treat that as a red flag and demand express limits or a pricing example covering at least the last 36 months.
Clause 3 — transfers, performance adjustment and who pays for connection investments
The Eckpunkte say customers will get a more limited, structured right to adjust contracted heat performance after energy‑efficiency measures, after receiving energy advice, or where the originally contracted performance is oversized; suppliers will be able to claim compensation for customer‑specific connection investments. The Cabinet text also says the BMJV will adjust the BGB rules that govern the legal relationship around a connection. This means two risks for a purchaser: first, the seller’s contract may allow the supplier to demand compensation from the property if the buyer reduces contracted performance; second, the supplier may require explicit consent to transfer the supply contract to a new owner or may impose conditions on assignment. Before notarisation, confirm whether the contract is binding on successors, whether supplier consent is required for assignment, and whether any seller warranty exists about historic connection investments and outstanding claims. If the contract contains a provision that the supplier can demand repayment or additional payment for "kundenspezifische Investitionen" on transfer, have that obligation quantified and secured (for example by proving the investment was already amortised or by inserting a capped indemnity in the purchase deed).
Practical pre‑notarisation checklist for foreign buyers
1) Obtain the supplier’s full standard terms and the tariff sheet; check the price‑change formula line‑by‑line and ask for worked examples covering the last 24–36 months. 2) Demand copies of all price‑change notices and any disputes or arbitration decisions involving the building. 3) Ask the seller for a written statement whether the supplier has been asked to consent to assignment and whether consent was given, refused or not requested. 4) If the price formula is cost‑linked, insist on a contractual obligation for the supplier to publish supporting data on request (or to place data on the federal transparency portal once available). 5) Make the notary record any outstanding supplier claims and require seller indemnities or escrow for quantified risks. Finally, instruct a German energy lawyer or notary familiar with Fernwärme to review clause wording – do not rely on informal translations.
Where to get help and what we relied on
This guide explains common traps and documents to request; it is not legal advice. For binding legal advice ask a German lawyer (Fachanwalt für Energierecht or Immobilienrecht) and the notary who will handle the deed. The factual points in this article are drawn from the Cabinet‘s Eckpunkte on the Wärmenetzpaket (26 Aug 2026) and the current AVBFernwärmeV (statutory text: §24 on price‑change clauses). See sources below for the primary documents.
Nothing on this page is investment, tax or legal advice. Price bands are indicative asking prices and disagree between sources by design. Verify every figure with a qualified German notary, tax adviser (Steuerberater) or lawyer before committing capital.
