Payroll SaaS

Payroll Software in Belgium

Aligned with Belgian Payroll Regulations

Our Payroll Platform in Belgium Supports You With

SEPA Payments
Statutory Filings

Standard, Statutory and Year-End Reports
Custom API Integrations

Dive deeper into Belgium

French

English

Written by Global Payroll Team

Published on September 25, 2026

Last updated September 25, 2026

Expert Reviewed

Payroll Software in Belgium

Mercans Payroll Software is a trusted solution for efficient, compliant, and streamlined payroll management in Belgium. Designed to address the practical needs of Belgian payroll, our software helps employers manage payroll processing, sector-based collective bargaining, double holiday pay, and statutory declarations with confidence.

Mercans Payroll Software is an all-in-one native SaaS solution for complete digitalization of your payroll process. Supporting businesses across more than 160 countries, it is designed for organizations of all sizes, from single entities to global conglomerates. Its scalable architecture and seamless integration across modules enhance the user experience with an intuitive interface that is both simple and effective.

Trusted the world over

Aligned with Belgian Payroll Regulations

National Social Security Office (NSSO/RSZ/ONSS) & Federal Public Service Finance

Our payroll software for Belgium is designed in alignment with Belgian statutory payroll reporting requirements and employer obligations involving authorities such as the National Social Security Office (NSSO/RSZ/ONSS) and the Federal Public Service Finance. Built to support established payroll reporting standards, the platform helps businesses navigate Belgium’s sector-based collective bargaining landscape with confidence, reducing compliance risk and supporting accurate quarterly multifunctional declarations (DmfA), withholding tax (bedrijfsvoorheffing/précompte professionnel) remittances, and single and double holiday pay calculations.

Why Choose Mercans

Native SaaS and payroll platform
Trusted by Fortune Global 500 companies and multinationals
Manage all employment types – employees, freelancers, contractors, expats
More than 100 inbound and outbound integrations are available today
Suitable for enterprise businesses
GDPR aligned, SOC 1 & SOC 2 compliant
Supports multiple currencies
ISO 20000 & ISO 27001 Certified
Global presence and multi-country payroll capabilities
OWASP ASVS aligned

Payroll Software Modules

Mercans Payroll Software offers managers and employees a powerful and intuitive online portal designed to streamline and enhance your HR and payroll activities.

Our advanced software modules are equipped with functionality to support efficiency, compliance, and a superior user experience. Learn about them here:

Manager Self Service

Empowers managers to handle HR tasks, including approvals, performance tracking, and employee management, directly from the platform.

Employee Self Service

Provides employees with direct access to their personal information, payroll details, and other HR resources, enhancing transparency and convenience.

Employee Help Desk

Offers a centralized support system for employees to address payroll and HR-related queries, ensuring quick resolution and improved satisfaction.

Data Exchange

Facilitates seamless integration with other systems and platforms through robust data exchange capabilities, streamlining data management and reducing errors.

eDrive and Workflows

Automates and streamlines HR processes with configurable workflows and document management, improving efficiency and compliance.

Time & Attendance

Tracks employee work hours, attendance, and productivity with precision, integrating seamlessly with payroll calculations.

Leave Management

Manages various types of employee leave, including vacation, sick leave, and other absences, with automated approval workflows and accurate tracking.

Loans & Expenses

Handles employee loans and expense claims, ensuring accurate processing and integration with payroll for seamless financial management.

Features of Payroll Software in Belgium

Employment Contracts & Collective Labour Agreements

Our payroll software supports Belgium’s employment framework, including the sector-level Joint Committees (paritair comité / commission paritaire) that negotiate the collective bargaining agreements covering nearly all Belgian employees. It can be configured for company- and sector-specific pay scales, allowances, and tailored employment terms, helping employers manage payroll in line with the applicable Joint Committee for each role.

SEPA Salary Payments

Mercans Payroll Software for Belgium supports processing salary payments in Euro (EUR) through the SEPA banking system, helping employers pay employees accurately and on time in line with Belgian payroll practice.

You have two options:

Option1

Send generated salary payment details from Mercans Payroll Software to Mercans Gateway. The Financial Gateway will then handle the dispatch of SEPA payments to Belgian banks, supporting locally compliant EUR processing.

Option2

Prepare and process salary and statutory contribution payments directly through your bank from within Mercans, without the need to download a separate payment file.

Mercans facilitates both options to accommodate your payment processing needs efficiently.

Payroll Reporting

Mercans Payroll Software supports accurate and timely payroll data submission for Belgian employer reporting obligations. It supports payslip generation, retroactive adjustments, special pay runs, and electronic reporting workflows to the National Social Security Office (NSSO/RSZ/ONSS) and the Federal Public Service Finance, including the quarterly multifunctional declaration (DmfA), monthly withholding tax (bedrijfsvoorheffing/précompte professionnel) remittances, and the annual individual salary certificate (Form 281.10).

Earnings and Deductions Calculation

Earnings: Global Payroll for Belgium allows you to define and manage various types of earnings. This includes base salary components, sector collective agreement allowances, single and double holiday pay, and applicable premiums and overtime.
Deductions: The software also supports the definition and processing of different types of deductions. Regular deductions can include withholding tax and employee social security contributions, while incidental deductions include salary advances, loans, and garnishments.

Taxes

Tax Calculation for Regular and Non-Regular Payments

Belgium applies a progressive federal withholding tax scale to regular payments, such as base salary and allowances, as well as to non-regular payments, such as the end-of-year bonus and double holiday pay, calculated according to the official withholding tax scales published each year.

Personal Income Tax Thresholds and Rates

Belgium’s federal income tax brackets are indexed annually. As a general guide, taxable income is taxed progressively at 25%, 40%, 45% and 50% as it rises through the relevant thresholds, with a basic tax-free allowance and a municipal surcharge (typically around 0-9% of the federal tax due) layered on top. Mercans confirms the exact current-year thresholds for each engagement.

Social Security Contribution Rates

Belgian social security contributions are calculated on gross salary: employees contribute a flat 13.07%, while employer contributions are category-dependent, running to approximately 27% (all-in) for white-collar employees and approximately 33% (all-in) for blue-collar employees, reflecting the additional employer funding of the blue-collar holiday-pay system.

Double Holiday Pay & Category-Based Holiday Funding

On top of ordinary salary continuation during leave, white-collar employees receive double holiday pay directly through payroll – an additional lump sum equal to approximately 92% of one month’s gross salary, typically paid in May or June. Blue-collar employees instead receive both single and double holiday pay as a combined holiday cheque funded through employer contributions to the National Office for Annual Holidays (RJV/ONVA).

Tax & Social Security Reporting Deadlines

Employers must remit withholding tax to the tax authorities by the 15th of the month following the month in which employees were paid. Social security contributions are declared quarterly through the multifunctional declaration (DmfA), generally due by the last day of the month following the end of each quarter. By the end of February each year, employers must issue and file each employee’s annual individual salary certificate (Form 281.10).

Termination Notice & Indemnity

Since the 2014 Unified Status reform, notice periods for employer-initiated termination of an indefinite contract follow a single statutory formula based on seniority, applying equally to blue-collar and white-collar employees, ranging from one week for under three months’ service up to 63 weeks plus one week per additional year beyond 21 years. Employers may instead pay an indemnity in lieu of notice covering base salary and all contractual benefits for the full notice period.

Mercans payroll software for Belgium efficiently manages and processes social security and holiday fund obligations. This encompasses

NSSO/RSZ/ONSS Employer Registration

Registration as an employer with the National Social Security Office before employing any staff in Belgium, together with the mandatory Dimona declaration filed before each new employee’s first working moment.

Contribution Calculation

Calculation of the flat 13.07% employee social security contribution and the category-dependent employer contribution, approximately 27% for white-collar and 33% for blue-collar employees.

Holiday Fund Coordination

Coordination with the National Office for Annual Holidays (RJV/ONVA) for blue-collar holiday pay, and calculation of double holiday pay paid directly through payroll for white-collar employees.

Accredited Social Secretariat

Support for affiliation with a government-accredited social secretariat, which is legally empowered to collect and remit social security contributions on the employer’s behalf.

Reporting

Integration of social security and holiday fund obligations into the quarterly DmfA filings required by Belgian authorities.

Mercans payroll software for Belgium provides comprehensive tools for managing various types of employee absences

Annual Leave

Administration of the statutory 20 days of paid annual leave for a full five-day working week, calculated based on work performed during the preceding reference year and pro-rated accordingly.

Public Holidays

Tracking of the 10 statutory paid public holidays observed each year.

Sick Leave

Tracking of continued salary during illness, with the duration and funding source – employer-paid guaranteed salary versus mutual health insurance – depending on worker category and length of incapacity.

Maternity Leave

Management of the statutory 15-week maternity leave entitlement (19 weeks for twins or triplets), with a cash sickness benefit of 82% of gross salary for the first 31 days, reducing to 75% thereafter.

Sector Holidays & Closures

Administration of any additional collective leave days or annual sector shutdown periods set by the applicable Joint Committee.

Overtime Pay Calculation

Our system calculates overtime at 150% of the normal hourly rate on weekdays and Saturdays, rising to 200% for work performed on Sundays or public holidays, in line with Belgian labour requirements.

Bank Integration

Global Payroll for Belgium integrates with Belgian banking workflows to support secure and efficient payroll processing by automating SEPA EUR payment data and minimizing errors.

Payment Files

The software generates and stores the necessary SEPA payment files for Belgian banks, covering EUR salary payments, social security contributions, and other deductions and benefits.

Sector Allowances

Support for the calculation and payment of common statutory and sector-level allowances, including transport reimbursement and shift premiums set by the applicable Joint Committee.

Reporting

Generation of the payment and reporting files required for National Social Security Office (NSSO/RSZ/ONSS) and Federal Public Service Finance submissions.

Payroll Workflows

Streamlines payroll processes with automated workflows tailored to the needs of Belgian businesses, enhancing efficiency and accuracy.

Social Security & Holiday Funds

Mercans payroll software for Belgium efficiently manages and processes social security and holiday fund obligations. This encompasses

NSSO/RSZ/ONSS Employer Registration

Contribution Calculation

Calculation of the flat 13.07% employee social security contribution and the category-dependent employer contribution, approximately 27% for white-collar and 33% for blue-collar employees.

Holiday Fund Coordination

Coordination with the National Office for Annual Holidays (RJV/ONVA) for blue-collar holiday pay, and calculation of double holiday pay paid directly through payroll for white-collar employees.

Accredited Social Secretariat

Support for affiliation with a government-accredited social secretariat, which is legally empowered to collect and remit social security contributions on the employer’s behalf.

Reporting

Integration of social security and holiday fund obligations into the quarterly DmfA filings required by Belgian authorities.

Absence Management

Mercans payroll software for Belgium provides comprehensive tools for managing various types of employee absences

Annual Leave

Administration of the statutory 20 days of paid annual leave for a full five-day working week, calculated based on work performed during the preceding reference year and pro-rated accordingly.

Public Holidays

Tracking of the 10 statutory paid public holidays observed each year.

Sick Leave

Maternity Leave

Sector Holidays & Closures

Administration of any additional collective leave days or annual sector shutdown periods set by the applicable Joint Committee.

Overtime, Bank and Payment

Overtime Pay Calculation

Our system calculates overtime at 150% of the normal hourly rate on weekdays and Saturdays, rising to 200% for work performed on Sundays or public holidays, in line with Belgian labour requirements.

Bank Integration

Global Payroll for Belgium integrates with Belgian banking workflows to support secure and efficient payroll processing by automating SEPA EUR payment data and minimizing errors.

Payment Files

The software generates and stores the necessary SEPA payment files for Belgian banks, covering EUR salary payments, social security contributions, and other deductions and benefits.

Sector Allowances

Support for the calculation and payment of common statutory and sector-level allowances, including transport reimbursement and shift premiums set by the applicable Joint Committee.

Reporting

Generation of the payment and reporting files required for National Social Security Office (NSSO/RSZ/ONSS) and Federal Public Service Finance submissions.

Payroll Workflows

Streamlines payroll processes with automated workflows tailored to the needs of Belgian businesses, enhancing efficiency and accuracy.

Payroll Implementation

Mercans’ standard payroll implementation process for Belgium is designed to ensure a smooth transition to our payroll system. This process is customized to meet the specific needs of each client, with timelines and deliverables varying based on complexity, data availability, and the number of parallel runs required. Below is an overview of the key steps involved in our implementation process.

Implementation Planning

Assign resources and define roles for the project. Conduct a kick-off meeting to outline objectives and confirm scope. Develop a detailed implementation calendar and plan. Provide a welcome package with project details and contacts. Schedule weekly update calls or emails to monitor progress. Obtain sign-off on the project scope.

Requirements Gathering

Hold workshops to understand client needs and document them. Complete business blueprinting to detail requirements and perform a gap analysis. Define and document any customization needs, including the applicable Joint Committee and sector collective agreement. Obtain sign-off on requirements to ensure they meet client expectations. Establish a comprehensive list of payroll-specific requirements.

System Configuration

Set up configurations tailored to Belgian payroll requirements. Customize the wage type catalog for relevant pay components, including single and double holiday pay. Configure data dictionaries and necessary interfaces for data integration. Adapt reports to meet Belgian regulatory standards. Set up Employee Self-Service (ESS) and Manager Self-Service (MSS) features.

Data Migration

Migrate employee and payroll master data and confirm its accuracy. Obtain sign-off on the migrated data to ensure correctness. Verify data integrity and completeness before proceeding with further steps.

Test Payroll Run

Run simulation payrolls to validate system configurations and perform parallel runs with existing systems. Complete test run sign-offs to confirm accuracy and execute end-to-end testing. Conduct user acceptance testing (UAT) and address any issues found.

Payroll Management Transition & Sign-off

Develop a transition plan for moving to live payroll and provide training for users. Implement a hypercare plan for post-go-live support and an escalation plan for critical issues. Create a fallback plan for potential disruptions and complete a go-live checklist for final sign-off.

Payroll Integration

Mercans Global stands out with its extensive reach and robust integration capabilities. Operating across more than 160 countries, Mercans supports connections with payroll, tax, HR, finance, banking, and compliance ecosystems to help employers maintain efficient payroll operations in Belgium.

Recognised Trust Sources

National Social Security Office (NSSO/RSZ/ONSS) & Federal Public Service Finance

Mercans’ integration capabilities are designed to support Belgian payroll reporting processes and secure data exchange with connected systems, reflecting our commitment to global standards and best practices.

Integration with HCM/ HRMS/ Workforce management platforms

Mercans’ Payroll Software integrates seamlessly with most HCM and payroll software, creating a unified experience between HR administration and payroll processing. Through the Employee Self Service (ESS) feature, employees can directly handle their payroll tasks, such as submitting worked hours or declarations. Once approved, these entries are processed within the payroll system. This efficient integration reduces errors and enhances productivity for both employees and HR administrators.

Custom API Integrations

Mercans provides custom API integrations across diverse industries, including hospitality, catering, theme parks, transport, sports, construction, healthcare, events, promotional sectors, greenhouse horticulture, and fresh produce.

Xero Integration

Integrate Mercans payroll with Xero to sync data, automate HR tasks, and streamline processes. Save time, reduce errors, and focus more on growing your business.

Payroll Reports – Standard, Statutory and Year-End Reports

Mercans’ payroll software is equipped to generate a comprehensive range of reports to support both standard and statutory requirements. These reports provide transparency, accuracy, and ease of integration with financial and regulatory systems.

Mercans Standard Reports

Report	Description
Gross to Net Report	Details employee earnings, taxable wages, employee deductions, employer costs and net pay for each payroll run in Belgium.
Payslip	Generates individual payslips showing gross pay, allowances, deductions, withholding tax and net pay.
Payroll Register	Provides the employee payroll register used to support Belgian payroll administration and social security calculations.
DmfA Filing Report	Produces the payroll reporting data required for the quarterly multifunctional declaration (DmfA) submitted to the National Social Security Office (NSSO/RSZ/ONSS).
Annual Payroll Summary	Generates the annual payroll summary for each employee, summarizing total compensation, statutory deductions and other year-end totals.
Bank Payment File (EUR)	Creates a SEPA-compatible EUR salary payment file according to client or bank specifications for payroll disbursement.

Statutory Standard Reports

Report	Frequency	Description
Monthly Withholding Tax Remittance	Monthly (by the 15th of the following month)	Statutory remittance of withholding tax (bedrijfsvoorheffing/précompte professionnel) deducted from employee salaries, paid to the Federal Public Service Finance.
Quarterly DmfA Declaration	Quarterly (by the last day of the month following quarter-end)	Statutory multifunctional declaration of employment and remuneration data submitted to the National Social Security Office (NSSO/RSZ/ONSS).
Annual Individual Salary Certificate (Form 281.10)	Annually (by the end of February)	Statutory annual certificate detailing each employee’s salary, benefits and withholding tax, filed with the tax authorities.

Year-End Reports

Report	Frequency	Description
Annual Payroll Summary	Annually	Annual employee statement summarizing total compensation, statutory deductions and other required year-end payroll totals.

These detailed reports are designed to support statutory and regulatory requirements, helping ensure efficient payroll management and accurate compliance.

Benefits of Payroll Software

Mercans offers a powerful payroll solution that optimizes payroll administration and HR processes. Here’s how our software benefits your organization:

Streamlined Payroll Processing
Additional Key Features

No External Dependency

Manage payroll directly through our application, eliminating the need for third-party processors.

Integrated HR and Leave Management

Handle payroll, HR tasks, and employee leave requests within one platform, simplifying administrative duties.

Reduced Manual Work

Automate routine tasks to minimize errors and ensure accurate payroll processing.

Customization

Personalize workflows to meet your specific business needs, enhancing efficiency.

Time Savings

Redirect time saved from automation to more strategic activities.

Seamless Integrations

Connect effortlessly with systems and leading HR platforms like SAP Success Factors, Workday, and Oracle for a unified workflow.

Centralized Data Management

Consolidate employee data in one place for easy access, updates, and analysis.

Employee Access

Empower employees with 24/7 access to their personal files.

Mercans’ payroll software provides a comprehensive, secure, and user-friendly solution, streamlining payroll processes and allowing you to focus on your most valuable asset, your people.

24/7 Access

Access payroll data anytime and from any location.

Transparent Pricing

Benefit from a fixed monthly fee plus a per-employee charge with no hidden costs.

Dedicated Support

Get expert assistance and advice to maximize the software’s benefits.

Secure Data Management

Support data protection and integrity with secure online processing and controlled backup practices.

Compliance Assurance

Stay compliant with current fiscal and employment regulations through maintained payroll rules and updates.

Mercans’ payroll software provides a comprehensive, secure, and user-friendly solution, streamlining payroll processes and allowing you to focus on your most valuable asset, your people.

Streamlined Payroll Processing

No External Dependency

Manage payroll directly through our application, eliminating the need for third-party processors.

Integrated HR and Leave Management

Handle payroll, HR tasks, and employee leave requests within one platform, simplifying administrative duties.

Reduced Manual Work

Automate routine tasks to minimize errors and ensure accurate payroll processing.

Customization

Personalize workflows to meet your specific business needs, enhancing efficiency.

Time Savings

Redirect time saved from automation to more strategic activities.

Seamless Integrations

Connect effortlessly with systems and leading HR platforms like SAP Success Factors, Workday, and Oracle for a unified workflow.

Centralized Data Management

Consolidate employee data in one place for easy access, updates, and analysis.

Employee Access

Empower employees with 24/7 access to their personal files.

Additional Key Features

24/7 Access

Access payroll data anytime and from any location.

Transparent Pricing

Benefit from a fixed monthly fee plus a per-employee charge with no hidden costs.

Dedicated Support

Get expert assistance and advice to maximize the software’s benefits.

Secure Data Management

Support data protection and integrity with secure online processing and controlled backup practices.

Compliance Assurance

Stay compliant with current fiscal and employment regulations through maintained payroll rules and updates.

This content was prepared for informational purposes only. As local laws & regulations keep on changing, please consult your tax & legal advisors.

Request a demo

Our team will guide you through our powerful payroll solutions and show you how we can tailor our services to fit your needs.

Please leave this field empty.

FAQs

What payroll functions should a SaaS platform support in Belgium (e.g., gross to net salary calculation, payslip generation, withholding tax, and social security declarations)?

Mercans payroll software for Belgium delivers end-to-end payroll processing including automated gross-to-net salary calculation, payslip generation, monthly withholding tax (bedrijfsvoorheffing/pr\xC3\xA9compte professionnel) remittance, and the quarterly multifunctional declaration (DmfA) to the National Social Security Office (NSSO/RSZ/ONSS).

How do payroll SaaS solutions ensure compliance with Belgian authorities (NSSO/RSZ/ONSS, Federal Public Service Finance) and statutory reporting obligations?

Mercans supports compliance by keeping pace with Belgian payroll legislation updates, including sector-level Joint Committee agreements and annual federal tax bracket indexation, and by streamlining filings and reports to the National Social Security Office (NSSO/RSZ/ONSS) and the Federal Public Service Finance.

What employer registration and employee data are required (e.g. Crossroads Bank for Enterprises (KBO/BCE) registration, NSSO employer registration, Dimona declaration) and how does payroll software assist with this?

Mercans automates onboarding by securely capturing and managing employer and employee data, including KBO/BCE enterprise number registration, National Social Security Office (NSSO/RSZ/ONSS) employer registration, and the mandatory Dimona declaration filed before each new employee starts work.

How does payroll software handle specific Belgian components like double holiday pay, the blue-collar/white-collar distinction, and sector Joint Committee bargaining?

Mercans payroll software automatically applies Belgium’s single and double holiday pay mechanics for both white-collar and blue-collar employees, coordinates with the National Office for Annual Holidays (RJV/ONVA) where required, and applies the correct Joint Committee collective bargaining terms for each role and sector.

Can payroll SaaS integrate with Belgian HR and ERP systems and support outsourcing or Employer of Record models?

Mercans offers robust integration capabilities with leading HR and ERP systems, supporting seamless payroll, HR management, and outsourcing models including Employer of Record, for full compliance and efficiency in Belgium.