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South Korea e-Invoicing

Updated 30 August 2025

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

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Standards:

XML format with PKI digital signatures

Supported Formats:

XML with mandatory PKI digital signatures and NTS validation

Clearance Model:

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

Archiving Requirements:

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.

N/A
No SAF-T implementation; Korea uses e-Tax Invoice system with NTS platform validation.

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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Frequently asked questions about e-Invoicing in South Korea

Primary sources for South Korea

nts.go.kr.

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Armenia
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Azerbaijan
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