Limits of this calculation
The calculator deliberately recommends no fees: what you charge a client follows your own practice and the German fee ordinance, not a marketing tool. It prices only your time, at the hourly rate you enter yourself. And at small volumes it tells you openly that software does not pay off yet.
What Stablewerk concretely takes over
The software has read-only access to wallets, values every transaction at a documented market rate from a named source, and books via a versioned rulebook with legal citations. Whatever the rulebook cannot place unambiguously reaches a human as a review case. At month-end there is a DATEV EXTF batch your firm imports like any other, with a hash-chained audit trail for a tax audit. You learn no new tool. The output lands in the one you already use.
A model, not a measurement; every assumption is named on the page and adjustable. Staffing figure: ifo survey, cited via Kanzleiwelt. No fee recommendation, no legal or tax advice.