Korean Construction Zombie Companies Triple in Five Years as Residential Margin Collapses to 1%

The Quick Take

• Zombie companies in Korea's construction sector increased from 62 firms (4.5%) in 2021 to 173 firms (11.3%) in 2025 — nearly tripling — across 2,004 externally audited construction companies
• Residential construction net income margins collapsed from 5.0% in 2021 to 1.0% in 2025 while debt ratios surged from 204.8% to 256.3%, driven by PF loan burdens and unsold housing inventory
• Civil engineering margins declined more moderately (4.3% to 3.5%) with stable debt ratios, revealing that residential housing — not infrastructure — is the epicenter of Korea's construction sector stress

South Korea's residential construction sector bears the concentrated weight of the post-2021 real estate downturn. High land acquisition costs, project financing liabilities tied to unsold inventory, and declining new housing starts have squeezed margins to near breakeven while borrowing costs remain elevated. The tripling of zombie company incidence signals that a meaningful cohort of construction firms can no longer sustain themselves without external support — lender forbearance, asset sales, or government restructuring programs.

The structural severity is underscored by the debt ratio divergence: at 256.3%, residential construction companies carry debt more than two-and-a-half times their equity — a level where even modest revenue shortfalls can trigger covenant breaches or insolvency proceedings. Policy responses have focused on PF restructuring and regulatory forbearance, but unless residential demand recovers materially, the zombie firm count is likely to continue rising through 2026.

Synthesized from 2 sources.