Hometax
The National Tax Service online tax portal used for filing, payment, certificates, and refund checks.
Glossary
Korean Tax Glossary in Simple English
Sontax
The mobile tax app from the National Tax Service. Some Hometax tasks may also be available in the app.
Global Income Tax
A Korean income tax filing category that may apply when a person has income requiring annual filing, often reviewed in May.
Year-End Tax Settlement
An employer-led annual tax adjustment process for many employees in Korea.
Withholding Tax
Tax withheld before income is paid, such as salary withholding or the common 3.3% freelance withholding arrangement.
3.3% Tax
A common withholding pattern for freelance or business-type service income. It does not automatically mean a refund is guaranteed.
Local Income Tax
A local tax connected to income tax. Payment or refund details may appear separately from national tax items.
Certificate of Income
A document that can show reported income and is often requested for visa, banking, housing, or employment purposes.
Tax Payment Certificate
A certificate showing tax payment status. Some offices may request it together with income documents.
Tax Residency
A tax concept that may depend on stay period, living base, income source, and treaty rules.
Tax Treaty
An agreement between countries that may affect how certain income is taxed. Treaty application depends on facts and documentation.
Flat Tax Rate
A special tax option that may be available to some foreign workers depending on eligibility and timing. It is not always the best choice.
ARC
Alien Registration Card, now commonly described as a foreigner registration card. It is often needed for identity verification.
Visa Extension
A process where immigration may ask for income or tax documents depending on visa type and situation.
National Tax Service
Korea's national tax authority. Always check official NTS or Hometax information for current rules and procedures.