Registering as a Foreigner
- Choose the individual sign-up path.
- Enter your Alien Registration Number and your registered name.
- Select an available identity-verification method and complete the account setup.
An Alien Registration Card is required for registration and for obtaining a digital certificate. Enter the name attached to your registration record rather than changing its spelling or order to match a preferred English format. If you do not yet have resident registration, start with Koursea's ARC appointment guide.
Choosing a Login and Verification Method
Public or financial certificate
A 공동인증서 or 금융인증서 can be issued through a Korean bank and used for Hometax authentication. A Korean bank account is also generally needed to receive a tax refund. See the separate Korean bank-account guide for foreign visa holders for that prerequisite.
Simple authentication
간편인증 through KakaoTalk, Naver, PASS or Toss covers most common Hometax functions as of 2026, including income-tax filing, the simplified year-end settlement service, certificate issuance and refund-status lookup. These apps generally expect an existing Korean mobile-carrier number tied to your identity. Confirm that your specific carrier and plan support the chosen service before relying on it.
What Should You Check When Hometax Login Fails?
| What you find | What it means | Next step |
|---|---|---|
| Your entered name differs from the registration record | Hometax cannot match the account to the ARC details | Use the exact registered spelling and order |
| The phone subscriber details differ from the ARC record | Simple authentication may fail its identity match | Confirm the subscriber name, phone number and registration details with the carrier |
| The bank certificate was issued under different identity details | The certificate and Hometax registration do not resolve to the same person | Ask the issuing bank to confirm the certificate record before trying again |
| One simple-auth app fails | The app, carrier plan or registered details may not support that verification path | Confirm eligibility or use another available Hometax authentication method |
| Every method fails despite matching details | The issue needs account-specific help | Call the Foreign Taxpayer Service Center or visit an NTS office |
Check one identity record at a time: registered name, ARC number, mobile subscriber details, then the bank certificate or simple-auth account. Repeating the same login without resolving a mismatch will not correct the underlying record.
What If None of the Login Methods Works?
Call the National Tax Service Foreign Taxpayer Service Center at 1588-0560 and select the English-language option. If the issue cannot be resolved remotely, visit an NTS office in person with your identification and the details of the failed authentication method.
Official sources
Portal and support details were checked against the National Tax Service on 2026-09-09.