Is POS software mandatory: who is concerned in 2026?
- The obligation targets VAT-registered businesses that record payments from private customers using POS software or a POS system.
- The software must meet four conditions known as ISCA: inalterability, security, retention and archiving of data.
- Compliance is proven by an NF525 / LNE certificate or, since the 2026 finance law, an individual attestation from the publisher (self-certification).
- Failing to use compliant software exposes you to a fine; keep the supporting document provided by the publisher.
Mandatory POS software concerns many retailers, but not everyone. The rule is above all aimed at fighting VAT fraud, and its scope is precise. Here is who is really concerned, what compliance means and what the 2026 finance law changes.
Who is concerned
The obligation applies to professionals subject to VAT who record the payments of their private customers using POS software or a POS system. This is typically the case for retail shops, restaurants or activities open to the public.
Conversely, a business that does not use a till, or that works exclusively B2B with invoicing, is not targeted in the same way. The central criterion remains the recording of payments from private individuals via a POS system.
The four ISCA conditions
A compliant POS software must guarantee four requirements, summed up by the acronym ISCA:
- Inalterability: recorded data cannot be modified afterwards;
- Security: operations are secured and traceable;
- Conservation (retention): data is kept over time;
- Archiving: it can be archived and provided to the authorities.
These conditions aim to prevent the discreet removal of revenue.
Proving compliance: certificate or attestation
Compliance is demonstrated in two ways:
- an NF525 certificate (issued by Infocert) or LNE, issued by an accredited body and stating the certified version of the software;
- an individual attestation from the publisher, drawn up according to the template set by the tax authorities.
News update: the 2026 finance law has reinstated the possibility, for publishers, of using self-certification via this individual attestation. The end of self-certification, considered at one point, has been postponed according to available information. In all cases, it is up to the user to hold and keep the supporting document.
The penalties
Being unable to present a valid certificate or attestation exposes you to a fine, and the authorities can request proof at any time. The reflex: systematically ask your publisher for the supporting document and file it carefully.
Choosing the right solution
Beyond compliance, a good POS software handles payments, sales tracking and receipt printing. Our comparison of the best POS software assesses solutions against these criteria, compliance included.
The till does not operate in isolation: sales feed into accounting. A compatible accounting software smooths this link and secures your declarations.
For the exact scope of the obligation and the attestation templates, refer to the official sources (economie.gouv.fr, impots.gouv.fr).
Frequently asked questions
Who must use certified POS software?
Professionals subject to VAT who record payments from their private customers using POS software or a POS system. Those who do not use a till, or who invoice only professionals, are not targeted in the same way.
NF525 certificate or publisher's attestation: what is the difference?
The NF525 certificate (or LNE) is issued by an accredited body. The 2026 finance law also reinstates the publisher's individual attestation, drawn up according to a template from the authorities, as proof of compliance (self-certification).
What is the risk without compliant software?
A fine is provided for in the event of missing proof of compliance, and the authorities can request proof at any time. You must therefore keep the certificate or attestation provided by the publisher.