In June I introduced incomly, back then as a gross-to-net salary calculator in MVP shape. Now the plan for the first version is fully done: incomly.eu has reached version 1 and is final and live.
What arrived since the MVP
- Company car calculator at
incomly.eu/firmenwagen: the German 1-percent rule plus the 0.03-percent commute surcharge, with a plain explanation of what a company car really costs you net. - Non-cash benefits calculator at
incomly.eu/geldwerter-vorteil: enter benefits in kind and see the net impact. - Hand-over into the main calculator: both special calculators have a “take this into the salary calculator” button. The benefit value flows straight into the salary calculation, where it correctly increases the tax and social-security base without being paid out.
- Glossary and FAQ: 24 explained terms from contribution ceilings to additional health-insurance rates, and ten common questions, each on their own page and in both languages.
The core stays the same: the wage tax is generated from the official specification of the German Federal Ministry of Finance and therefore computes bit-for-bit what the tax office computes. The details are in the introduction post.
Quality and operations
For the final stretch I worked less on features and more on substance: the calculation logic is now covered by 76 automated tests, including integration tests against known reference values. On top of that came the SEO basics (sitemap, structured data, proper preview images) and a self-built anonymous traffic counter with a small admin dashboard, without cookies of course.
Nothing changes about the privacy architecture, which is the reason the project exists: every calculation runs locally in your browser. Your salary never leaves your machine, there are no ads, no cookies and no consent banner.
What’s next?
Version 1 is not the finish line. The list holds more specialised calculators (mini-job, working students, severance pay with the German one-fifth rule) and, further out, more countries. For now, this version gets to show what it can do.
Try it at incomly.eu. If your real net pay differs from the calculation, I want to hear about it: the contact form is enough.
