What can the Lohnica Payroll API do today?

Complete payroll calculations in real time: gross-to-net, net-to-gross, employer costs and trial payroll runs with PDF export – including historisation and automatic corrections for previous months.

A complete payroll calculation takes milliseconds. That is enough for interactive scenarios: every change can be recalculated instantly without making users wait.

Is the API GDPR compliant?

The Gross-to-Net API works anonymously and needs no personal data – which makes integration particularly easy. All transfers are encrypted end to end.

What does the API cost?

All calculation APIs – including trial payroll runs – are billed by request volume. Live operation from 2027 starts at €5 per employee per month, via API or in the payroll software. Details on the pricing page.

How can I test the API?

Right away and without registration: in the salary calculator on this website or on brutto-netto-api.de. For the Payroll API we are happy to set up a test account.

Contact

REST API · Real time

Payroll API

for Germany

The full complexity of German payroll accounting behind one simple interface.

Book a call Try it now API documentation

REST / JSONResponses in millisecondsGDPR compliantGross-to-Net API liveTrial payroll runs liveNotifications 2027

What it covers

Complete payroll accounting as an API

The Lohnica API lets you run even complex payroll calculations in real time.

01Staff costs

Calculating and forecasting staff costs

What does a new hire really cost?
Which gross salary fits the planned budget?
How large does the accrual for the next payroll run including social security have to be?

The answers are calculated within a few milliseconds.

02Gross ↔ net

Real-time net salary calculator

Calculation of net and gross salary
Takes tax classes, child allowances and further factors into account

03Scenarios

Smart planning of salary increases

What is left of the gross salary? Play through different scenarios.
The fast response times of the API allow you to explore other types of income interactively – company car, gym membership, private use of the company phone.

Reference

The features in detail

3 areas · 6 topics

Historisation of master data

For changes in the past and in the future
Query the valid master data for a given date
For employee and company data

Send the data to the API in any order – Lohnica takes care of the rest.

Historisation of variable data

Working hours
One-off payments
Allowances

Data for previous months can be added and corrected later as well.

Transparency

Where Lohnica stands

What is already live in production today – and what comes next.

Live today

Gross-to-Net API in production use
Payroll API with complete trial payroll runs
MCP server for AI assistants
Salary calculator to try right away

In progress

ITSG system examination: completion planned for 2027
Electronic notification procedures for tax and social security

2027

Live payroll runs including electronic notifications
Online payroll software in self-service

FAQ

Frequently asked questions

Yes – Lohnica has been building a payroll API for the German market since 2023. Gross-to-net calculations run in production, complete trial payroll runs too; electronic notifications to the authorities follow in 2027.

Contact

Interested?

We would be happy to discuss the many ways you can put our Payroll API to work.

Please note: The API currently supports trial payroll runs only. Notifications to the social security authorities will be possible from 2027.

info@lohnica.de