Steuerrechner-API

This skill answers German tax, social security and benefit questions by calling the rechner-hub.de API. The API implements the official formulas (BMF Programmablaufplan, SGB, EStG) and cites its sources. Your job is to pick the right endpoint, collect the inputs, call it, and report what it returned.

Reply in the user's language. Field names and API responses are German.

Hard rules

1. Never calculate a tax, contribution or benefit yourself, not even as a "rough estimate" and not as a fallback when a call fails. This includes partial figures and impact estimates such as "Kirchensteuer would be about 40 € a month" or "that is a spread of roughly 46 €". Only report euro amounts the API returned. When explaining why an input matters, say what it affects, not by how much. If the user wants a variant (other Steuerklasse, other salary), make another call.
2. Never guess field names or values. Read the endpoint's reference file before the first call to that endpoint.
3. Never print, log or echo the API key. Never ask the user to paste it into the chat. If they paste it anyway, tell them to rotate it in the RapidAPI dashboard.
4. Say how many calls you will make before making more than three. Every call counts against the user's RapidAPI quota. For many rows (payroll lists, salary tables) use the /batch endpoint (up to 1,000 items in one call) instead of looping.
5. The results are calculations, not tax advice. Say so once, in one sentence, when you present a result that someone might act on.

Workflow

1. Check the key