Optimization of the Social Solidarity Contribution for Companies (C3S) and Other Parafiscal Taxes
Since 2020, the tax trajectory of French companies has experienced two distinct phases: a period of massive relief to support the economy during the health crisis, followed, from 2024-2025, by a “brake” marked by exceptional contributions to restore public finances.
It is all the more important that you have control over the amounts claimed by the tax authorities and a full understanding of the calculation methods applied.
The Althéa Approach
Challenge the contribution base to generate cash flow.
At Althéa, we provide you with unique technical expertise as well as legal and case law monitoring, ensuring increasingly relevant support in line with legislative or doctrinal developments.
Our continuously evolving cost-saving levers cover the following areas:
- Social Solidarity Contribution for Companies (C3S)
- Parafiscal taxes
- VAT
- Exceptional transactions
- Special statuses
- Sector-specific commercial practices
Our Optimization Methodology
Our processes place your practices and sector-specific characteristics at the heart of our studies. To identify secure cost-saving opportunities, we deploy the following method:
Steps:
- Familiarize ourselves with the specifics of your industry and organization
- Secure internal practices
- Identify areas of overpayment to recover excess payments for non-statute-barred periods
- Support your teams in adopting new processes. We ensure that your savings are sustained internally
GDPR
With the growing importance of data security, we also guarantee the protection of your information in accordance with the EU General Data Protection Regulation (GDPR).
Optimization Challenges for the Private Sector
Controlling Tax Costs
Analyzing your C3S guarantees that you pay the correct amount. It is not always easy for internal teams to allocate the time necessary for a thorough study. We find optimization opportunities in 80% of our engagements.
Generating Cash Flow and Reinvesting It
The reimbursement of overpayments over the 3 non-statute-barred years generates significant savings. These can prove strategic in the context of an investment plan.
Expertise to Secure Your Practices
Our expertise secures the scope of our intervention. High-risk practices are identified along with proposals for corrective actions.
Choose Althéa as your partner to optimize your taxation!
Would you like to learn more or initiate a tax charge optimization project?
Business Cases
Textile Industry
€150,000+ recovered and C3S divided by three
Client profile:
- Sector: Textile Industry and Distribution
- Model: Mixed (B2B and B2C)
- Market: France and Export (International)
Issue:
An overestimated C3S taxable base due to lack of fine distinction between sales flows. A textile sales company operating in B2B and B2C.
Before our intervention:
The company declared its entire revenue without considering the specifics of its sales structures. It incorrectly added certain commercial flows to its base.
Our intervention:
Our firm conducted a comprehensive audit of the last three years (non-statute-barred period) to redefine the actual taxable base.
Results:
- Immediate reimbursement (Cash flow): + €150,000 (Non-statute-barred period)
- Annual tax reduction: – 66% (Divided by 3)
- Recurring savings generated: €50,000 / year
Construction
€270,000 in savings and sustainable gains on C3S
Client profile:
- Sector: Building and Public Works (BTP)
- Activity: Major national or international projects with extensive use of subcontracting
- Sector specificity: Retention guarantees, subcontracting, complex discounts—sources of invisible additional costs
Issue:
Complex management of price discounts and financial flows related to subcontracting contracts, resulting in an overestimated taxable base.
Before our intervention:
Given the workload of accounting teams and CFOs, as well as the complexity of managing daily flows, the C3S had never received particular attention and the data reported by URSSAF was not challenged.
Our intervention:
We reviewed all contracting methods, all pricing discount practices, and all VAT practices.
Results:
- Savings achieved (Cash flow): + €270,000
- Recurring annual gain: + €90,000 / year
- Compliance: Securing internal practices for the future
FAQ
How can a company reduce its tax burden?
It is possible to challenge the amounts of taxes paid by taxpayers by acting on:
- Rates: act on the tax rate and seek to apply reduced rates
- Base: reduce the base subject to tax
Our expertise enables us to conduct a detailed analysis of strategies that could be deployed to reduce the amounts paid.
What is the cost of a tax review?
Our study is conducted free of charge: from gathering the necessary elements for analysis to presenting our conclusions. We are compensated based on the amount of savings actually reimbursed by URSSAF.
What is the timeframe between submitting a claim and receiving the refund?
On average, 4 months elapse between URSSAF receiving the reimbursement request and the receipt of savings.
Why challenge your C3S?
With its rate of 0.16% and its automatically reconstituted base, the C3S is rarely analyzed: finance departments prefer to focus on taxes that weigh more heavily on team workload (VAT) or on company finances (corporate tax).
Are holding companies subject to payroll tax?
A distinction must be made between pure holding companies: they have no economic activity. They only hold and receive dividends. These holding companies are subject to the Payroll Tax.
Active holding companies: they play a real role in the group’s strategy. They are true managers, etc. They are therefore partial payers of the Payroll Tax.
