Guide

TSE Compliance for Restaurants in Germany

Since 2020, electronic cash register systems must be equipped with a certified TSE. What does this mean for your restaurant?

Try TSE-compliant POS system

What is a TSE?

The Technical Security Device (TSE) is a security module mandatory since January 1, 2020 under Section 146a of the German Fiscal Code (AO) for all electronic cash register systems in Germany. The TSE cryptographically signs every transaction and stores it tamper-proof.

Note: This guide is for general information only and does not constitute legal advice. Please consult your tax advisor or attorney for specific questions.

Sources: Section 146a AO, BSI — Technical Guideline TR-03153

What Restaurant Owners Need to Know

These requirements apply to all businesses with electronic cash register systems:

  1. Use Certified TSE

    Your POS system must have a BSI-certified TSE — as hardware module (USB/SD) or cloud TSE.

  2. Sign Every Transaction

    Every transaction — sale, cancellation, return — is cryptographically signed by the TSE.

  3. Receipt Obligation

    Since January 2020, a receipt must be issued for every transaction — digital or paper.

  4. Registration with Tax Office

    Cash register systems must be registered and deregistered with the local tax office.

  5. Retain Data for 10 Years

    All TSE data, receipts, and logs must be stored immutably for 10 years.

Penalties for TSE Non-Compliance

Tax authorities are tightening enforcement — especially in gastronomy:

EUR 25,000

Fine per Violation

Missing or manipulated TSE can result in fines up to EUR 25,000 per case.

Estimation

Revenue Estimation

Without proper TSE, tax authorities may estimate your revenue — usually significantly higher than actual income.

Cash Audit

Unannounced Inspection

Tax authorities can inspect your TSE and cash data at any time without prior notice.

TSE-Compliant with GastroSystem

GastroSystem offers a POS system that automatically meets all TSE requirements:

Certified Cloud TSE

Our integrated cloud TSE is BSI-certified — no additional hardware needed.

Automatic Signing

Every receipt is automatically signed. You don't have to worry about anything.

DSFinV-K Export

Export all cash data in the legally required DSFinV-K format for tax audits.

10-Year Archiving

All transactions are stored audit-proof and GoBD-compliant for 10 years.

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Frequently Asked Questions About TSE

Do I need a TSE for an open cash register?

No. The TSE requirement only applies to electronic cash register systems. Open cash registers are not affected.

Hardware TSE vs. Cloud TSE?

A hardware TSE is a physical module (USB/SD card). A cloud TSE signs data via a certified online connection. Both are BSI-certified and equally recognized.

What deadlines apply in 2026?

The TSE requirement has been in effect since 2020. Since 2026, tax authorities have intensified enforcement with more unannounced cash audits.

How much does a TSE cost?

With GastroSystem, the cloud TSE is included in the monthly flat rate — no additional costs.

Is GastroSystem TSE-compliant?

Yes. GastroSystem meets all requirements including BSI-certified TSE, receipt obligation, and DSFinV-K export.

TSE-Compliant from Day One

GastroSystem handles compliance — you focus on your guests. Not legal advice — consult your tax advisor for specific questions.

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