Tax Agency Builds Crypto Tracking System Across 100 Blockchains

System to Analyze More Than 100 Million Transactions Experts Question Ability to Calculate Actual Gains

Finance|
|
By Kim Jung-woowoo@sedaily.com
||
Yonhap News - Seoul Economic Daily Finance News from South Korea
Yonhap News

South Korea's National Tax Service is accelerating work on a transaction tracking network ahead of the planned taxation of cryptocurrency next year.

The agency plans to equip its Integrated Virtual Asset Analysis System, under construction through the end of this year, with the ability to automatically trace transactions across more than 100 blockchains, according to financial industry sources on the 2nd. A recently published request for proposals for next year's system operation and maintenance project specifies a transaction tracking function that will automatically trace more than 100 million transactions across more than 100 blockchains and visualize the movement of funds. The goal is to follow the flow of money even when cryptocurrency moved to a personal wallet travels through multiple blockchains.

The system will also be able to trace so-called mixing transactions, which blend holdings from multiple users to conceal the path of funds. The tax agency plans to add functions that trace mixed transactions back to their source and automatically detect suspicious activity, such as splitting cryptocurrency across multiple wallets or moving it repeatedly.

The Integrated Virtual Asset Analysis System is tax infrastructure being built with an investment of about 3 billion won ($2.1 million). It combines transaction data from domestic exchanges with blockchain transaction records to analyze each taxpayer's cryptocurrency holdings and transaction flows going back as far as five years. About 500 million won has been allocated for operating the system and licensing transaction tracking software next year.

Industry officials say that even with these capabilities, tracking every transaction accurately will be difficult. "When funds pass through a combination of multiple exchanges, swap services and personal wallets, the difficulty of tracing them rises," said Cho Yoon-sung, head of product at Tiger Research. "The mere fact that funds moved out of a particular wallet makes it hard to determine whether it was a trade or simply a transfer between wallets. Calculating the acquisition cost and the actual gain or loss [for taxation] is a separate problem."

Original reporting by Kim Jung-woo for Seoul Economic Daily.

AI-translated from Korean. Quotes from foreign sources are based on Korean-language reports and may not reflect exact original wording.

Watch · Seoul Economic Daily

More →
1:05

AI KEY

Preview
Korean Corporate Intelligence HubKOSPI · KOSDAQ · 12 sectors

A live, cap-weighted view of every KOSPI and KOSDAQ sector, with same-day Korean reporting distilled by company — built for foreign investors, correspondents and analysts who need to scan Korea before the next session.

Korea Company Atlas

Preview
Market Ontology · The Feedback LoopKFTC 2025 · 92 groups · 121,954 articles

An English ontology of the Korean market — how companies, the media, the government and the National Assembly move each other in a loop. Korea's named controlling persons and designated business groups are a mechanism, not a risk to be priced blind.

SIGNAL

Now live
English Edition · Capital MarketsM&A · IPO · PE · Fund Flows

SIGNAL English Edition is live — Korea's deal desk reporting in English. M&A, IPOs, private equity and fund flows, covered daily for global institutional investors. Browse free; subscriber-only scoops at the 50% intro rate.