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South Korea e-Invoicing

Updated 30 August 2025

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  • Key facts
  • Timeline
  • Tax & Compliance
  • Formats
  • FAQ

South Korea mandates e-invoicing for B2B businesses with revenue of at least 100M KRW since July 2023, and for all B2G transactions under the e-Tax Invoice system since 2011. Invoices use XML with PKI digital signatures and real-time validation by the National Tax Service.

South Korea e-Invoicing Overview

B2B
mandatory
since 1 July 2023
Mandatory for businesses with revenue ≥ 100M KRW.
B2G
mandatory
since 1 January 2011
Mandatory for all government transactions under e-Tax Invoice system with National Tax Service.
B2C
none
No specific B2C mandate found; system primarily focuses on B2B/B2G transactions.

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Implementation Timeline(3 events)

Key mandate dates. Select a date for detail, or show all updates below.

e-Tax Invoice system launch
1 January 2011
National system
National Tax Service launched mandatory e-Tax Invoice system.
Threshold reduction to 200M KRW
1 July 2022
Expanded coverage
Revenue threshold for mandatory compliance reduced to 200M KRW.
Current threshold: 100M KRW
1 July 2023
Current mandate
Revenue threshold further reduced to 100M KRW, expanding mandatory coverage.

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Compliance Regime

CTC Model
Real-time reporting
Real-time reporting to National Tax Service within 1 day; continuous transaction control model
Network
Real-time reporting
Standards
XML format with PKI digital signatures

Record-keeping & Reporting

Archiving
5 years retention per Value Added Tax Act ; NTS stores e-invoices centrally; Non-compliance may result in penalty tax up to 2% of transaction amount.
SAF-T
N/A
No SAF-T implementation; Korea uses e-Tax Invoice system with NTS platform validation.

Technical Formats

XML with mandatory PKI digital signatures and NTS validation

Detailed exemptions, penalties and cross-border rules for South Korea are not yet published. The official sources have the latest detail.

Official Sources

  • nts.go.krOfficial site
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Related Countries

  • ArmeniaMandatory
  • AzerbaijanMandatory
  • ChinaMandatory
  • GeorgiaMandatory

Frequently asked questions about e-Invoicing in South Korea

Yes, e-Invoicing is mandatory in South Korea for B2B (since 2023-07-01) and B2G (since 2011-01-01) transactions.

B2B e-Invoicing in South Korea is mandatory since 2023-07-01. Mandatory for businesses with revenue ≥ 100M KRW.

B2G e-Invoicing in South Korea is mandatory since 2011-01-01. Mandatory for all government transactions under e-Tax Invoice system with National Tax Service.

South Korea supports the following e-Invoice formats: XML with mandatory PKI digital signatures and NTS validation.

South Korea uses the following e-Invoicing standards: XML format with PKI digital signatures. Archiving requirement: 5 years retention per Value Added Tax Act ; NTS stores e-invoices centrally; Non-compliance may result in penalty tax up to 2% of transaction amount..

Real-time reporting to National Tax Service within 1 day; continuous transaction control model