Bad Birnbach charges a Kurbeitrag per person and stay day; the arrival and departure days count as one day, and started days count as full days. The standard adult rate in Kurzone 1 (Bad Birnbach and Aunham) is €3.40 per person/night. The official visitor information lists €2.90 for Kurzone 2 and €1.60 for Kurzone 3. The charge includes statutory VAT. A separate annual flat-rate system applies to qualifying second-home owners and long-stay guests.
Business travelers are listed as exempt. Children under 14, persons with 100% severe disability, and a necessary accompanying person documented on the disability pass are exempt. Persons with 80% or 90% severe disability receive a 50% reduction. The official visitor page expresses the child rule as children up to age 13.
The Kurbeitrag rules cover people who accommodate guests or otherwise provide them with housing, including camping-site operators. Hosts must report all accommodated persons to the Markt without delay electronically using the municipal registration-card procedure or an interface, collect the Kurbeitrag, and remit it no later than one day after departure (unless monthly remittance is approved); they are liable for payment. The reviewed official materials do not specify a short-term-rental registration number or a general Zweckentfremdungsverbot. A separate municipal tourism-purpose statute does impose an approval reservation under §22 BauGB for creating or dividing specified condominium, leasehold, permanent-residence, or permanent-use rights across the market area.