🔎 Business Code & Expense Rate Search

Business code: a 6-digit code the NTS assigns per business type, used for registration and income tax filing. Simplified expense rate: deems income x rate as necessary expenses without bookkeeping (estimated filing). Simplified excess rate (in parentheses): personal-service providers (lecturers, actors, writers, code 940xxx) use a lower rate on income above 40 million KRW. Standard expense rate: only non-major expenses are deemed via income x rate; double-entry filers apply half. Whether you fall under the simplified or standard rate depends on your prior-year revenue and industry threshold — confirm on Hometax or with a tax agent.

⚠️ Based on the National Tax Service of Korea expense-rate notice

Why the business code matters

The 6-digit business code identifies your business type and drives income tax filing. The same activity registered under a different code can carry a different expense rate and materially change your tax, so freelancers and small businesses filing by estimation should verify the rate for their code.

Simplified vs standard expense rate

The simplified rate deems income x rate as expenses and is used by small or new businesses. The standard rate recognizes major costs (purchases, rent, payroll) only with documentation and deems the rest via income x standard rate. Once revenue exceeds the industry threshold, filers move from simplified to standard.

Excess rate for personal services

Personal-service providers (lecturers, actors, models, writers, one-person creators, code 940xxx) have a base and an excess simplified rate. Income up to 40 million KRW uses the base rate; the excess uses a lower rate, shown here in parentheses.