Project Overview
Company A, the general contractor on a public construction project in the Seoul metropolitan area, included special conditions in both subcontracts requiring all on-site workers to be enrolled in industrial accident and workplace compensation insurance and obligating the subcontractors to submit proof of enrollment. Subcontractors B and C never enrolled. From April through August 2023, Company A paid the full premium amounts — covering the subcontract portions as well — to COMWEL (Korea Workers’ Compensation and Welfare Service) in a lump sum. Having already paid the subcontract prices in full, Company A’s out-of-pocket loss reached approximately KRW 66 million.
Legal Issue: Statutory Employer Status and the 30-Day Deadline
Under Article 9(1) of the Act on the Collection of Insurance Premiums for Employment Insurance and Industrial Accident Compensation Insurance, the general contractor is the default employer for insurance purposes in multi-tier construction projects. To transfer that status to a subcontractor, the general contractor must execute a written handover agreement and apply to COMWEL for approval within 30 days of the subcontract commencement date (Enforcement Decree, Article 7(3)). Company A missed that window, leaving it responsible for the subcontractors’ premium obligations as a matter of public law — but that did not extinguish its contractual and civil law remedies.
Key Evidence: Special Conditions Clause and Cost Breakdown Schedule
The court’s finding of unjust enrichment rested on two categories of documentary evidence. First, the special conditions clause (Article 7) of each subcontract expressly required the subcontractor to enroll in insurance and submit proof to the general contractor. Second, consistent with Article 22(7) of the Framework Act on the Construction Industry — which mandates separate itemization of insurance premiums in contract cost schedules — the subcontract cost breakdown schedules for both Company B and Company C listed industrial accident insurance (labor cost × 3.5%) and employment insurance (labor cost × 0.9%) as distinct line items. The construction cost calculation sheets attached to the subcontractors’ own completion payment requests carried identical figures. The subcontractors’ argument that a reduced final payment meant the premiums were not included was rejected.
Court Outcome
The Incheon District Court rendered judgment on February 6, 2025, granting Company A’s claim in full. Company B was ordered to return KRW 41,862,951 and Company C KRW 24,295,644, together with delay damages at the annual rate of 20% under the Act on Special Cases Concerning Expedition of Legal Proceedings, accruing from the day after service of the complaint on each defendant respectively.
Practical Takeaways
This case demonstrates that missing the 30-day COMWEL approval window does not foreclose civil recovery. Three practices remain essential regardless: clearly stating the insurance enrollment obligation in the subcontract special conditions; separately itemizing premium amounts in the subcontract cost breakdown schedule; and regularly collecting proof-of-enrollment certificates from subcontractors throughout the project.
Legal Expertise
Atlas Legal advises and litigates across construction disputes, subcontract claims, and civil recovery actions. Our team handles matters from contract drafting and pre-execution review through trial and enforcement, applying experience-based judgment to protect clients’ financial interests at every stage.