Frequently Asked Questions (FAQ) - OneGate

What is OneGate?

OneGate is a completely secured online application provided by the National Bank of Belgium to declarers. The application allows the companies to submit declaration forms online, either by entering the data manually or by uploading files.

Go to top...

Access to OneGate

How to access OneGate?

Here you will find the login pages to the application.

Go to top...

Do I need a username/password or do I need an Electronic Certificate?

In most of the cases, you will only need a username and a password. If however, the inquiry concerns sensitive information, you will be asked to log-in using an Electronic Certificate. This depends on the inquiry you have to submit. For more details, please contact the manager of the inquiry within the National Bank.

Go to top...

How to connnect with a username and password?

You can request a username and password by sending an email to Please mention the following:

  • your company number,
  • the name of your company,
  • name and telephone number of a contact person,
  • the domains for which you request access (if known) and
  • if you'd like access to the production or the test environment.

Access by means of username and password is used for the majority of the declarations. For some enquiries, a higher degree of security is requested. For this we use the access by means of Electronic Certificate.

Go to top...

How to connect with an electronic certificate?

Connecting with an Electronic Certificate, you provide an even higher degree of confidentiality. The use of the electronic certificate is even compulsory for certan declarations.

OneGate recognizes Electronic Certificates from Globalsign, Isabel & Quo Vadis. These are the same certificates that are accepted in E-Government-applications like Intervat, Finprof, Dimona, DMFA and DRS.

These certificates can be acquired from the following providers:

These providers issue Electronic Certificates after payment and after authentication by the applicant. Generally, it is compulsory to physically report to these companies with your ID-card before receiving the Electronic Certificate.

When logging into to OneGate-application, choose the option "identification with an Electronic Certificate" and choose your copy of the certificate.
During your first login, the person logging in will be asked to identify themselves. This happens by entering an identification-code (e.g. BIC-code, KBO-number...). During the next hours, access will by granted to the user. This is confirmed via email.
If the certificate was already registered and valid, the user will get immediate access.

Only for Banks and Monetary ICB's, there exists a possible to work with a NBB Electronic Certificate.

Go to top...

What do I do when I lose my password?

I you loose or forget your username and/or password, the declarer must contact the administration of the OneGate-application. He will be given an new username and password.

Go to top...

Third Party Declarers

What is a Third Party Declarer?

The OneGate-Application allows declarers to given access to a third party (accounting firm, fiduciary office...) to fill in their inquiries for them.

Go to top...

What do I do when I want to assign a Third Party Declarer?

If you want to assign a Third Party Declarer, you have to fill in this document. This document should then be sent to the administration of the application. They take all next steps regarding the Third Party Declaration.

Toegangsbeheer OneGate
NBB - Dienst DQSI
de Berlaimontlaan 14
1000 Brussel

Go to top...

Compatibility of Webbrowsers

Which browers can I use with OneGate?

The new OneGate application works on the following operating systems and browsers:

  • Windows: Internet Explorer 11 (*), Edge, Mozilla Firefox, Chrome or Opera.
  • Linux: Mozilla Firefox, Chrome or Opera.
  • Mac: Mozilla Firefox or Safari.

  • (*) Like Microsoft, we recommend for performance reasons using the Edge browser instead of Internet Explorer 11

We can not guarantee you proper operation on other web browsers.

Go to top...

Openingshours OneGate

Monday - Friday 00:00-24:00, Saturday 00:00-16:00, Sunday 12:30-24:00(*)
(*) Declarations submitted on Sunday will only be processed from Monday 00:00.

Go to top...

reated: 17 March 2021 | Updated: 17 March 2021