South Korea — Hiring & Payroll Setup

All employers in South Korea are required by statute to register their business for social insurance obligations as soon as they begin employing staff. The four principal social insurance schemes are: National Pension (National Pension Act), National Health Insurance (National Health Insurance Act), Employment Insurance (Employment Insurance Act), and Industrial Accident Compensation Insurance (Industrial Accident Compensation Insurance Act).

Statutory Registration Requirement:

Upon hiring any employee—even just one—an employer must register the workplace and the employee with the appropriate government agencies. Article 3 of the National Health Insurance Act Enforcement Rules (국민건강보험법 시행규칙) specifically requires employers to submit a workplace application within 14 days of hiring their first employee. Parallel provisions apply under the National Pension Act, Employment Insurance Act, and Industrial Accident Compensation Insurance Act; all four schemes are linked via the national business registration system.

Automatic Enrollment (“Deemed Registration”):

Since December 11, 2019, under a Ministry of Employment and Labor (MOEL, 고용노동부) policy, employers who register a new business with the tax authority are now automatically considered enrolled in the health, pension, employment insurance, and industrial accident schemes as of the business start date. This “신고의제” (deemed notification) system, implemented jointly with the National Health Insurance Service (NHIS, 국민건강보험공단) and Korea Workers’ Compensation & Welfare Service (COMWEL, 근로복지공단), eliminates registration duplication. However, material changes (such as hiring the first employee) still require notice within 14 days to the relevant agencies.

Mandatory Nature and Penalties:

Registering and participating in all four insurance schemes is mandatory, regardless of business size or the number of employees; exceptions are extremely limited (such as certain part-time student workers). Penalties for late registration or non-compliance can include payment of owed premiums with surcharges and administrative fines. Compliance with these social insurance registration steps is a core prerequisite for legal payroll operations in Korea.

Source: National Health Insurance Act Enforcement Rules, Art. 3 Source: MOEL, Announcement of Automatic Social Insurance Enrollment, Dec. 2019

South Korean law requires employers to provide every employee with a written employment contract at the time of hiring, stating key terms of employment. Article 17 of the Labor Standards Act (근로기준법) imposes this obligation regardless of the formality or industry of employment: “The employer shall prepare and provide to the employee a document specifying the terms and conditions of employment.”

Mandatory contract content: The written contract must, at minimum, specify working hours, wage calculation and payment date, paid holidays, annual leave, and grounds for termination. Article 17(2) and Article 93 of the Act enumerate the minimum required disclosures and any work rules that must be clearly stated in writing.

Timing and delivery: The document must be issued immediately upon the commencement of work. The law does not permit oral-only contracts or delayed delivery. Since 2021, written employment contracts may also be delivered electronically (e.g., by PDF or secure messaging platform) if the employee consents. Failure to provide a proper written contract can result in fines up to KRW 5 million under Article 114.

Language: There is no statutory requirement to provide the contract in a foreign language, but for foreign workers, best practice is to provide an accurate Korean-language version accompanied by a translation.

This written contract requirement applies to all employees, including non-permanent and part-time workers, except in very limited exclusions for certain family and agricultural workers.

Source: Labor Standards Act, Art. 17, Labor Standards Act, Art. 93

Employers in South Korea are legally required to calculate, withhold, and remit payroll income tax (근로소득 원천징수) and local inhabitant (local income) tax on all employee wages, under the Income Tax Act (소득세법) and Local Tax Act (지방세법).

Scope and Trigger Under Article 145 of the Income Tax Act, any employer paying wages or salary to employees must withhold income tax at the source every pay period. The withholding tables and calculation methods are set by the Ministry of Economy and Finance under the Enforcement Rule of the Income Tax Act. There is no explicit carve-out by company size or ownership; exceptions are only as enumerated by law.

Withholding and Payment Deadlines

• National payroll (income) tax withheld from employees' wages must be paid to the National Tax Service (NTS) by the 10th of the month following payment (Income Tax Act, Art. 145(1)).
• Additionally, the employer must withhold and remit local inhabitant tax, calculated as 10% of the national income tax amount withheld, to the relevant local government by the same deadline (Local Tax Act, Art. 103-17).

Monthly and Annual Returns Employers are obligated to file a monthly withholding tax report (원천징수이행상황신고서), specifying the wage amounts and tax withheld and remitted (Income Tax Act, Art. 145(7)). There is also a statutory annual settlement (“year-end tax adjustment” or 연말정산) requirement: employers recalculate tax liability for each employee at the year’s end based on actual income, credits, and deductions, and must make necessary adjustments, typically in the February payroll of the following year (Income Tax Act, Art. 137(1)-(3)).

Penalties for Non-Compliance Failure to withhold or remit employee payroll taxes on schedule exposes the employer to penalties and surcharges as set forth under the National Tax Collection Act (국세징수법). Unable to confirm as of 2026-07-11.

Source: Income Tax Act, Art. 145 Source: Income Tax Act, Art. 137 Source: Local Tax Act, Art. 103-17