Contract clauses to limit exposure to municipal second‑home tax in Munich, Stuttgart and Potsdam

What the tax is, in plain terms

Several German cities levy a local Zweitwohnungsteuer (second‑home tax). It is charged on the person who “has” a second home in the city and is calculated on the annual net cold rent (Nettokaltmiete). Municipal statutes set the rate and the declaration and payment rules — these differ between cities and have changed in recent years. For the legal definition of who is taxable, see the municipal ordinance language (example: Munich § 3 defines the taxable person as the natural person who holds a second home). ([stadt.muenchen.de](https://stadt.muenchen.de/rathaus/stadtrecht/vorschrift/997/version2/0.html))

Rates and effective dates you must know

Munich: the city’s ordinance sets the rate at 18 % of the annual Nettokaltmiete; the service page and the ordinance record the change from 9 % to 18 % that took effect from 1 January 2022. Payment is due according to the local rules (Munich’s page notes a general deadline of 1 July in the absence of a new assessment). ([stadt.muenchen.de](https://stadt.muenchen.de/service/info/zweitwohnungsteuer/1074722/n0/))

Stuttgart: the city’s information page states a rate of 10 % historically and an increase to 20 % effective 1 January 2026. Check the local tax office notice and the municipal ZwWStS for implementation mechanics and filing. ([stuttgart.de](https://www.stuttgart.de/rathaus/finanzen/steuern-und-abgaben/zweitwohnungssteuer?utm_source=openai))

Potsdam: the city’s published Zweitwohnungssteuersatzung (5th amendment) fixes the rate at 25 % of the Nettokaltmiete; the amendment was adopted 23 December 2025 and appears in the published lesefassung (effective entry in the 2026 Amtsblatt). Potsdam’s text also sets quarterly payment dates and sanctions for late or missing declarations. ([potsdam.de](https://www.potsdam.de/system/files/document/Lesefassung%20Zweitwohnungssteuersatzung%202000%20mit%205.%20%C3%84nderung%202025_0.PDF))

Why a buyer should care (short list)

• The tax targets the person who holds the second home — if you buy but do not change the registration or use, the municipality may pursue the natural person who appears to occupy or hold the property. (See municipal definitions and notification rules.) ([stadt.muenchen.de](https://stadt.muenchen.de/rathaus/stadtrecht/vorschrift/997/version2/0.html))

• Municipal rules commonly require prompt notification and permit the city to estimate a notional ‘usual rent’ where the contractual rent is below market; that can increase the tax base. Potsdam’s statute includes penalties and administrative fines for late or missing declarations. ([potsdam.de](https://www.potsdam.de/system/files/document/Lesefassung%20Zweitwohnungssteuersatzung%202000%20mit%205.%20%C3%84nderung%202025_0.PDF))

• Rates vary materially (Munich 18 %, Stuttgart 20 % from 2026, Potsdam 25 %) so post‑completion tax cost can be significant and should be allocated contractually. ([stadt.muenchen.de](https://stadt.muenchen.de/rathaus/stadtrecht/vorschrift/997/version2/0.html))

When to insist on specific contract protections

Insist if any of these apply: the seller is a private individual who currently occupies the flat as a second home; the property is registered as a Nebenwohnung in the local register; you plan to keep the property vacant or use it as a pied‑à‑terre; the purchase closes after a recent municipal rate increase; or the buyer is non‑resident and will remain registered abroad while owning the property. In these situations the commercial impact of a 18–25 % annual tax on the Nettokaltmiete is large enough to justify escrow, seller indemnity or price reduction clauses. (See city statutes for registration and notification duties.) ([stadt.muenchen.de](https://stadt.muenchen.de/rathaus/stadtrecht/vorschrift/997/version2/0.html))

Model clauses (English wording for your draft)

1) Seller warranty and indemnity "The Seller warrants that, up to the date of notarisation, there are no outstanding assessments, demands or unresolved declarations relating to municipal Zweitwohnungsteuer for the property. The Seller shall indemnify the Buyer and hold the Buyer harmless against any such tax, penalties and collection costs attributable to periods prior to notarisation."

2) Price‑hold / escrow for unknown exposure "A sum equal to €[X] (or €[Y] per month of exposure calculated as Rate × annual notional net cold rent) shall be retained in escrow for up to 12 months after completion to meet any confirmed Zweitwohnungsteuer assessments attributable to periods prior to completion; any remainder shall be released to the Seller."

3) Cooperation and notification "The Seller shall, at Seller’s cost, provide the Buyer and the relevant tax authority with all information and documents required to determine whether the property constitutes a second home and to obtain any available exemptions. The Seller shall reimburse the Buyer for reasonable costs of such cooperation if an assessment arises relating to the pre‑completion period."

These clauses are model text. Tailor them to the deal and seek a German notary or tax adviser to draft enforceable German wording.

Final practical steps

1) Check the city rate and the ordinance text for the property’s municipality and cite them in the contract. Munich, Stuttgart and Potsdam statutes are linked below. ([stadt.muenchen.de](https://stadt.muenchen.de/rathaus/stadtrecht/vorschrift/997/version2/0.html))

2) If the seller is a natural person or the flat is currently registered as a Nebenwohnung, insist on a warranty plus escrow/indemnity. 3) Ask a German tax adviser or the notary to confirm whether any registration or filing at closing (Anmeldung/Ummeldung) will change tax exposure, and draft the final German clause accordingly. This article is explanatory only; seek professional tax or legal advice for your transaction.