Process optimization

Import data from your accounting software and avoid errors with our extensive set of verifications.


Transfer information from the previous accounting year. Quickly navigate through the sofware via hyperlinks and the advanced search functionality.

Regulatory compliance

Close collaboration with the competent authorities ensures our software consistently complies with the most recent regulations.

User friendly

Navigate through the application and verifications easily using our intuitive interface.

Reliable helpdesk

Have a question or need assistance? Our helpdesk is a trustworthy partner. We will gladly help you by telephone or by email.


First Software is linked to most accounting packages and runs under both Microsoft Windows and macOS.

  • First Tax Declarations

    • Create Tax Declarations efficiently
    • Corporate tax
    • Non-residents tax (corporate)
    • Legal Person Tax
    • Easy deposit in Biztax
    • Real-time verifications
    • Accurate calculation
    • Deposit in envelope
  • First Annual Accounts

    • Create annual accounts efficiently
    • File XBRL-files at the NBB
    • File PDF-files at the NBB
    • Schemes for companies and NPOs
    • Statistical survey
    • NBB verifications and additional verifications
    • Financial analyses over 5 periods
    • Print in 4 languages

Linked Accounting Software

First Annual Accounts is an extension to your accounting software. It is a specialised task within accounting. Only few accounting software tools include an annual account module. Therefore, an efficient alignment between accounting software and software to fill in your annual accounts is very important.

Intersentia wants to collaborate actively with various accounting software developers. Click here for a full overview of all linked accounting software tools.


"Thank you for the very fluent intervention. TOP-support."

Filip De Frène - Financial Responsable Belgium/The Netherlands Group Galloo Recycling

"I had to use the helpdesk two days in a row and was helped two times in a very fluent and accurate way. An example for all helpdesks."

            Guy De Roover - Financial Manager Benelux Esselte


Our clients are our best reference. More and more accountants and companies are using First Software

We have over 2.000 clients, ranging from independent accountants to the big four audit- and accounting firms; from SME's to multinationals!