The management of social declarations and contributions represents a heavy administrative burden for the payroll services of French companies. With constant regulatory changes, increased controls from URSSAF, and the growing complexity of the DSN, the risks of errors and adjustments increase every year. Software like Côté RH aims to reduce this exposure by automating part of the declaration process.
Substitute DSN URSSAF: a concrete risk since 2026
Since 2026, URSSAF has a new lever to correct persistent anomalies in employers’ DSNs. The mechanism, called substitute DSN, allows the organization to directly replace the data declared by the company after a contradictory phase.
In practice, URSSAF compares the declared base to that recalculated from the monthly DSNs. If discrepancies persist, particularly regarding the capped gross base (the target of the first 2026 campaign), and the company does not correct within the given timeframe, the substitution is triggered. Companies have about two months to regularize or contest the anomalies before URSSAF takes over.
This mechanism relies on the exploitation of business reports (CRM) sent monthly to employers. CRMs of types 119, 120, 124, or 132 signal specific anomalies.
A payroll software capable of reading and automatically processing these returns offers a real advantage: it allows for the detection of discrepancies before they trigger a substitution procedure. This is where tools like Côté RH can differentiate themselves, provided that the automated processing of CRMs is effectively integrated. A practical guide on Europe Entreprises details the software’s features in this declarative aspect.
Reform of the contribution triggering event: preparing payroll before 2027
A structural reform is on the horizon for payroll services. The triggering event for social contributions will evolve, with a pilot phase engaged between 2025 and 2026, and an enforceability planned for 2027. This reform modifies the rule for attaching contributions: the date to be retained will no longer necessarily be that of the salary payment, but that of the triggering event of the remuneration.
For payroll managers, the change is far from cosmetic. It involves revising the logic of calculating contributions on certain bonuses, allowances, or deferred remuneration elements. Payroll software that does not integrate this new attachment rule will expose companies to calculation errors on the contribution base as soon as it comes into effect.
Field feedback varies on this point: some companies are already testing the new settings alongside their current DSN, while others are waiting for the final texts. A tool like Côté RH can add value if it offers an anticipatory setting that allows simulating the impact of the reform on the payroll before its mandatory application.
Social contributions and compliance audit: what the software can (and cannot) do
The automation of payroll and social declarations reduces a well-identified category of errors: data entry errors, omissions in updating rates, inconsistencies between payslips and DSNs. In these aspects, efficient management software saves significant time for HR teams.
However, some risk areas remain difficult to cover with the software alone:
- Improperly applied social contribution exemptions, which are among the main reasons for URSSAF regularizations
- Professional expenses whose treatment varies according to collective agreements and each company’s internal practices
- Atypical situations (multi-employer employees, expatriates, employee savings schemes) where standard settings are insufficient
A regular audit of social data remains complementary to the use of software. The tool secures the current process, while the audit covers the blind spots. Côté RH can integrate automated consistency checks, but human verification on complex cases remains necessary.
Social reporting and management of employee data with Côté RH
Beyond declarative compliance, centralizing payroll data in a single software opens up management possibilities. Social reporting allows HR departments to track the evolution of the payroll, identify the heaviest contribution items, and detect recurring anomalies.
Côté RH offers reporting features that aggregate employee data over several periods. This type of monitoring allows for identifying:
- Discrepancies in contributions from one month to another without apparent justification
- Employees whose insurance or supplementary retirement settings are incomplete
- Outdated contribution rates that have not been updated after a regulatory change
The quality of the reporting directly depends on the reliability of the data entered upstream. Software does not correct erroneous input data. The initial data entry and control work, often underestimated, conditions the relevance of any social dashboard.
The period 2026-2027 concentrates several regulatory deadlines that increase pressure on payroll services: active substitute DSN, imminent reform of the triggering event, increasingly automated URSSAF controls. Software like Côté RH addresses part of these challenges by automating declarations and structuring social data.
The limits remain those of any tool: it processes what is configured for it. Human vigilance on atypical cases or recent regulatory changes remains the last line of defense against costly errors.
