Your Accounting Partner in Marcq-en-Barœul, Supporting Businesses Across Hauts-de-France
We support SMEs and business leaders at every stage of their development, in France and internationally. Our added value lies in delivering reliable accounting and financial expertise, provided by experienced accountants who understand both local and cross-border business environments.
75+ independent professionals advised
Craftspeople, retailers and liberal professionals rely on us for strategic and legal guidance, allowing them to focus fully on their core business.
+800 employees supported
Beyond figures, this represents a human responsibility: securing payroll, ensuring social compliance and simplifying daily management for both leaders and teams.
Over €100 million in turnover supervised
A figure that reflects the strength of the businesses we support and the reliability of our advisory services.
9 countries
represented
Companies from Europe, Asia and North America trust Alliés Conseils to support their successful establishment in France.
Two Founding Partners Fully Committed to Your Business
As strategic partners to our clients, our founding associates are directly involved in every engagement, ensuring financial compliance while providing clear, actionable insights to support your business decisions.
Independent and people-focused, we combine proximity with expertise to deliver measurable value and advice that directly supports your growth.
Fabien CASSAN,
Partner
Chartered Accountant & Statutory Auditor
Fabien Cassan is a Chartered Accountant and Statutory Auditor with over 15 years of experience across accounting firms of all sizes. Trusted business partner, he supports companies in achieving their financial objectives by delivering tailored, pragmatic solutions.
He is driven by a strong commitment to excellence, accuracy, and long-term client satisfaction.
Sylvain LECAT,
Partner
Chartered Accountant & Statutory Auditor
With over 15 years of experience, Sylvain Lecat advises self-employed professionals and SMEs across a wide range of industries. Highly engaged and client-focused, he works with business owners to make financial information clear and actionable, helping them define effective accounting, payroll, tax, and legal strategies.
His approach is built on proximity, clarity, and practical advice tailored to each stage of a company’s development.
Our Vision : Being at the Heart of Your Financial and Accounting Strategy
At Alliés Conseils, accounting is not just about numbers — it is about strategy. We work alongside business leaders to support critical financial, tax, and social decisions, helping them turn compliance into a source of clarity and growth.
Our approach combines technical expertise with business insight to deliver measurable value at every stage of your development.
Your Dedicated Accounting Team in Northern France
Based in Marcq-en-Barœul, at the heart of the Lille metropolitan area, our accounting firm supports businesses across Northern France and the wider Hauts-de-France region.
Our team brings together specialised Chartered Accountants and committed professionals, delivering tailored support to business owners — whether SMEs, franchises, self-employed professionals, or non-profit organisations.
As an independent, human-sized firm, Alliés Conseils places proximity at the core of its client relationships. Each client benefits from a dedicated point of contact—responsive, accessible, and fully invested — ensuring that our partnership is built on trust, not just processes.
Our Services
Alliés Conseils offers a comprehensive range of services designed to meet both the day-to-day and strategic challenges of businesses. Our support covers:
Alliés Conseils : Your Accounting Partner for SMEs
As Chartered Accountants specializing in SME support, we understand the daily challenges faced by business owners. Our role is to provide tailored solutions based on your company’s size, sector, and specific needs.
Based in Marcq-en-Baroeul, near Lille, our independent accounting firm partners with businesses across the Hauts-de-France region to ensure secure financial, legal, and payroll management — allowing you to stay focused on growing your business.
Chartered Accountants, Strategic Allies for Business Leaders
Experience at the Service of Businesses
With over 15 years of experience, we have supported local SMEs, growing start-ups, and international groups. This expertise allows us to provide practical, personalised support at every stage of a company’s lifecycle.
More Than an Accounting Firm – A Growth Partner
We go beyond bookkeeping: we become true strategic allies, supporting our clients through growth, successes, and challenging moments. Our firm combines accounting rigour, personal attention, and strategic insight to build long-lasting relationships based on trust.
The Expertise of Our Accounting Firm
Accounting and Tax Advisory
We support SMEs with their day-to-day operations: general accounting, tax filings, VAT, legal obligations, and legal assistance. We also make accounting information accessible and implement processes designed to simplify management and decision-making.
Management Control and Performance Monitoring
We deploy tracking tools, budgets, and performance indicators to help business leaders make informed decisions. This precise oversight enables companies to anticipate cash flow changes and strengthen financial resilience.
Cross-Border Business Support
As specialists in international business, we assist foreign companies establishing operations in France, covering accounting, tax, payroll, and reporting in compliance with local regulations. This tailored support helps avoid administrative pitfalls and facilitates smooth growth in the French market.
Statutory Audit and Assurance
Registered with the Compagnie des Commissaires aux Comptes, our firm offers legal and contractual audit services. Audits and account certifications enhance financial transparency and credibility with partners and investors.
Comprehensive, Tailored Support
From tax filings to payroll management, management control, and auditing, we provide 360° support to secure compliance and optimise decision-making. Our goal: enable SME leaders to focus fully on their core business, supported by an independent, responsive, and client-focused accounting firm.
Get in Touch with Our Team
Have a project, a question, or simply want to better understand our services? Our team is here to listen and provide initial guidance on your accounting, legal, or payroll challenges.