South Korea’s tax windfall gives Seoul new room to spend and borrow less



Briefings South Korea’s tax windfall gives Seoul new room to spend and borrow less Seoul’s revised forecast opens room for targeted support and lower bond issuance, but much of the gain is cyclical KOREA PROOctober 1, 2026 SHARE COPY LINK FACEBOOK X LINKEDIN MASTODON A technician holds up a semiconductor chip, Sept. 28, 2022 \| Image: Unsplash South Korea expects national tax revenue to reach $353 billion (478.6 trillion won) in 2026, up $77.2 billion (104.7 trillion won) from 2025 and $46.6 billion (63.2 trillion won), or 15.2%, above the supplementary budget estimate, according to the Ministry of Economy and Finance (MOEF). The ministry attributed the increase to stronger-than-expected semiconductor profits, special dividends from chipmakers, buoyant equity markets and recovering private consumption. Corporate tax revenue is now projected at $100.6 billion (136.4 trillion won), $25.8 billion (35 trillion won) above the supplementary budget forecast and 61.2% higher than in 2025, while income tax revenue is expected to © Korea Risk Group. All rights reserved. No part of this content may be reproduced, distributed, or used for commercial purposes without prior written permission from Korea Risk Group. LATEST ANALYSIS 01South Korea’s CPTPP push exposes the cost of turning trade gains into consensus 02AI storage boom gives South Korea battery makers an EV overcapacity lifeline 03South Korea’s Mexico strategy runs into the hard limits of USMCA politics 04Preschool test ban forces South Korea’s English hagwons to rethink placement 05Lee Jae Myung’s Wall Street pitch tests South Korea’s capital market credibility 06US midterm clock raises stakes for South Korea’s $200 billion investment talks 07Lee’s Hormuz red line tests South Korea’s leverage in $350 billion US talks 08South Korea’s AI data center boom is colliding with the true cost of power

Briefings

South Korea’s tax windfall gives Seoul new room to spend and borrow less

Seoul’s revised forecast opens room for targeted support and lower bond issuance, but much of the gain is cyclical

KOREA PROOctober 1, 2026

South Korea’s tax windfall gives Seoul new room to spend and borrow less

A technician holds up a semiconductor chip, Sept. 28, 2022 | Image: Unsplash

South Korea expects national tax revenue to reach $353 billion (478.6 trillion won) in 2026, up $77.2 billion (104.7 trillion won) from 2025 and $46.6 billion (63.2 trillion won), or 15.2%, above the supplementary budget estimate, according to the Ministry of Economy and Finance (MOEF). The ministry attributed the increase to stronger-than-expected semiconductor profits, special dividends from chipmakers, buoyant equity markets and recovering private consumption.

Corporate tax revenue is now projected at $100.6 billion (136.4 trillion won), $25.8 billion (35 trillion won) above the supplementary budget forecast and 61.2% higher than in 2025, while income tax revenue is expected to

South Korea’s tax windfall gives Seoul new room to spend and borrow less

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