For Europe's 230,000+ cross-border workers

Your cross-border finances,
on autopilot.

You work in Luxembourg. You live in France. Your taxes shouldn't be a second job. Frontalia is the AI agent that monitors, optimizes, and manages your cross-border finances while you sleep.

Calculer mon net → Gratuit · Barèmes 2025–2026 · Aucune inscription
Avg. tax savings found
€2,352
per frontalier / year
Treaty changes tracked
24/7
FR-LU, FR-DE, FR-CH
236K
Cross-border workers
in Luxembourg alone
€33K
Average salary gap
between LU and FR
3
Tax systems to navigate
just to file correctly
0
Tools built specifically
to manage it all for you

Not a tool. An employee.

Frontalia doesn't wait for you to ask questions. It works around the clock, catching what you'd miss.

Tax Optimization Engine

Continuous simulations across filing scenarios. Should you claim tax assimilation? File jointly or separately? How many remote days before you lose Luxembourg taxation? Frontalia runs the numbers so you don't have to.

Regulation Radar

The 2025 France-Luxembourg treaty changed everything. Frontalia tracks every treaty update, reform, and threshold shift, then tells you exactly what it means for your wallet.

Deadline Guardian

Luxembourg filing deadlines, French declarations, social security thresholds. Never miss a date, never pay a penalty. Frontalia handles the calendar.

Take-Home Calculator

Real-time net salary estimation that accounts for both countries. Input a raise, a bonus, overtime, remote days, and instantly see the impact across borders.

How it works

01

Tell Frontalia about you

Where you live, where you work, your family situation. Two minutes of setup. That's it.

02

It goes to work

Frontalia analyzes your cross-border situation, identifies optimization opportunities, and monitors regulatory changes 24/7.

03

You save money

Actionable alerts when something changes. Pre-filled tax documents. Deductions you didn't know existed. All automatic.

Built in Thionville.
For everyone who crosses the border.

Every morning, 124,000 French workers drive to Luxembourg. They earn more, live better, and navigate an impossible tax maze in between. Frontalia exists to make the maze disappear.

Cross-border work is the future of Europe. The financial tools should match.