Behind this technical term lies a structuring reform: it is no longer just a matter of declaring remuneration in the month it is paid, but of allocating it to the period to which it is legally due.<\/p>\n\n
This shift, strengthened from 1 January 2025<\/strong>, imposes a new requirement on employers: to produce payroll that is not only compliant, but also justifiable and traceable.<\/p>\n\n In payroll, the triggering event corresponds to the principle used to determine which period remuneration should be allocated to<\/strong>, in order to apply correctly:<\/p>\n\n In other words, the reasoning is no longer based solely on the \u201cpay month\u201d, but on the period of employment or acquisition of entitlement<\/strong>.<\/p>\n\n This change in logic was initiated by the decree of 9 May 2017, then consolidated in the French Social Security Code, notably in Article R. 242-1. The version resulting from the decree of 29 December 2023 applies in full to sums paid from 1 January 2025<\/strong>, further strengthening this event-based approach. <\/p>\n\n A common confusion remains between two distinct notions:<\/p>\n\n Thus, remuneration may be paid in M+1, while still needing to be allocated to M for the calculation of contributions.<\/p>\n\n It is precisely this time lag that makes payroll configuration and DSN more complex.<\/p>\n\n Each pay element must be associated with a clear reference period.<\/p>\n\n The BOSS doctrinal work reinforces this principle: the applicable legislation is that in force during the period to which the remuneration is allocated<\/strong>, not that of the payment month alone.<\/p>\n\n This requires a fine-grained classification of payroll items, well beyond simplified calendar-based reasoning.<\/p>\n\n Complexity arises mainly when payroll includes elements relating to past periods:<\/p>\n\n The operational positions published by net-entreprises provide a pragmatic framework: for common situations in the normal payroll cycle, the applicable rules are those in force at the time they are taken into account in payroll<\/strong>, even if the original period is earlier.<\/p>\n\n This requires clearly distinguishing between:<\/p>\n\n DSN provides specific correction mechanisms. A past error must not be adjusted informally in the current month, but via the dedicated regularisation blocks, allocated to the period concerned. <\/p>\n\n A correction declared \u201cin the wrong place<\/em>\u201d can lead to:<\/p>\n\n The triggering event is not only a technical topic: it is also organisational.<\/p>\n\n Without a clear reference framework, risks multiply:<\/p>\n\n A payroll team must be able to demonstrate:<\/p>\n\n The triggering event directly impacts:<\/p>\n\n An adaptation phase is announced from 1 July 2025, with full enforceability from 1 January 2027.<\/p>\n\n The reform leads to a mechanical strengthening of checks:<\/p>\n\n The risk relates to both:<\/p>\n\n The triggering event requires formalising practices that are sometimes implicit:<\/p>\n\n Before closing<\/strong><\/p>\n\n After closing<\/strong><\/p>\n\n Configuration becomes critical:<\/p>\n\n Without reliable upstream data (HRIS, time and attendance), compliance becomes difficult to guarantee, even with robust configuration.<\/p>\n\n Payroll is gradually becoming event-based:<\/p>\n\n Situations long handled uniformly must now be distinguished:<\/p>\n\n This distinction directly determines allocation and reporting methods.<\/p>\n\n By 2027, the challenge will no longer be only to avoid technical rejections, but to be able to justify:<\/p>\n\n The triggering event in DSN goes far beyond a simple technical change. For payroll teams, the challenge is clear:<\/p>\n\n The triggering event thus becomes a lasting foundation for compliance, rather than a one-off DSN adjustment.<\/p>\n\n Engagement Manager ALTHEA<\/p>\n<\/div>\n<\/div>\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" For several years, the D\u00e9claration Sociale Nominative (DSN) has been profoundly transforming payroll teams\u2019 practices. Among the major developments is a notion that is now central: the triggering event. Behind this technical term lies a structuring reform: it is no longer just a matter of declaring remuneration in the month it is paid, but of […]<\/p>\n","protected":false},"author":20,"featured_media":19226,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19222","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classe"],"acf":[],"yoast_head":"\nThe triggering event: what exactly are we talking about?<\/u><\/strong><\/h1>\n\n
A principle for allocating remuneration<\/strong><\/h2>\n\n
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Not to be confused: triggering event \u2260 DSN due date<\/strong><\/h2>\n\n
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What obligations apply to employers and payroll teams?<\/u><\/strong><\/h1>\n\n
Applying the social rules for the \u201cright month\u201d<\/strong><\/h2>\n\n
Securing the processing of prior periods<\/strong><\/h2>\n\n
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Correct properly\u2026 and avoid false corrections<\/strong><\/h2>\n\n
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Documenting and tracing allocation rules<\/strong><\/h2>\n\n
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What are the concrete impacts in payroll and DSN?<\/u><\/strong><\/h1>\n\n
Impacts on calculations<\/strong><\/h2>\n\n
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Impacts on checks and audits<\/strong><\/h2>\n\n
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Impacts on payroll processes<\/strong><\/h2>\n\n
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Impacts on HRIS and DSN configuration<\/strong><\/h2>\n\n
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What this reform really changes<\/u><\/strong><\/h1>\n\n
From payment-centred payroll to event-centred payroll<\/strong><\/h2>\n\n
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A now-structuring boundary between back pay and correction<\/strong><\/h2>\n\n
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A more auditable DSN<\/strong><\/h2>\n\n
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![\"\"](\"https:\/\/althea-groupe.com\/wp-content\/uploads\/2026\/01\/2025_01_08_BENEZIT_Guillaume_0239_-1-1024x1024.jpg\")
<\/figure>\n<\/div><\/div>\n\n\n\nWritten by<\/h3>\n\n\n\n
Guillaume Benezit <\/h4>\n\n\n\n