---
title: "Dimona, DmfA and NSSO filings for employers | Paycore"
description: "We file your Dimona before every start date and your quarterly DmfA on time. No penalties, no delays, no forgotten declaration to worry about ever again."
url: "https://www.paycore.be/en/services/dimona-nsso"
lang: "en"
---

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3. Dimona and NSSO declarations

Filings

# Dimona and NSSO declarations

A Dimona goes out before every start date, a DmfA every quarter. These are the statutory filings whose omission costs you penalties, and they are ours.

[Book a 30-min call](https://www.paycore.be/en/contact)[Call us on 02 537 77 71](tel:+3225377771)

## In practice

Before a worker sets foot in your business, the NSSO has to know they work there. That is the Dimona: an immediate electronic declaration, filed before the first day, which proves the employment is in order. Every quarter the DmfA is added, detailing what each person earned and worked.

These two filings are the most expensive to forget, and also the easiest: a replacement decided the day before, a student who comes in on a Saturday, a contract extended without a second thought. We file them for you, follow the receipts, and warn you when the NSSO flags an anomaly.

## What is included

- Dimona in and out, filed before the first working day
- Quarterly DmfA, corrections and adjustments
- Social risk declarations: sickness, temporary unemployment
- Occupational accident declaration to your statutory insurer
- Follow-up on receipts and anomalies flagged by the NSSO

## The other responsibilities

- [Payroll management and payslipsFair salaries, calculated and checked every month, on a fixed date.](https://www.paycore.be/en/services/payroll-management)
- [Employment contracts and legal documentsSound contracts and documents that comply with the law.](https://www.paycore.be/en/services/employment-contracts)
- [Employment law adviceA clear answer where the rule is not.](https://www.paycore.be/en/services/employment-law-advice)
- [Hiring your first employee, without the stressFrom affiliation to the first payslip, without missing anything.](https://www.paycore.be/en/services/hiring-your-first-employee)
- [Labour inspection: preparation and supportBefore, during and after the inspection, you are not alone.](https://www.paycore.be/en/services/labour-inspection-support)

## Frequently asked questions

What employers ask us most often about this.

When must the Dimona be filed?

Before the worker starts, without exception. It is what proves the employment was declared from the first minute, and it is the first thing an inspector checks.

What is the risk if a Dimona is forgotten?

Employment without a Dimona is treated as undeclared work, with the administrative penalties that follow. That is why we file it ourselves rather than reminding you to.

What is the DmfA, and how often?

It is the quarterly return that reports each worker's pay and hours to the NSSO. It follows from the quarter's payroll: if that is right, so is the return.

## A question about this in particular?

Ask it. A handler answers within 24 working hours, without jargon.

[Book a 30-min call](https://www.paycore.be/en/contact)[Call us on 02 537 77 71](tel:+3225377771)