ISA Cuts, ETF Delistings — How Korea's Tax Overhaul Is Rattling Everyday Investors

Korea's 2026 tax overhaul has sparked fierce pushback from investors—strong enough that President Lee signaled a full review of the package. Let's break down exactly what's changing and why it matters.

First: ISA Tax Benefits Are Being Cut

ISA (Individual Savings Account) is a single account where you can hold stocks, bonds, and funds while enjoying preferential tax treatment up to a set limit. The current structure offers tax-free gains up to certain thresholds and allows loss offsetting. The new proposal alters this framework in ways that increase the effective tax burden for many retail investors who have relied on ISA as a core tax-optimization tool.

Second: Active ETFs May Be Forced to Delist

The more surprising change involves 'correlation rules.' Active ETFs aren't passive index trackers—they're managed by fund managers who pick stocks to try to beat the market. The new rules require delisting if an active ETF's returns correlate too closely with its benchmark index.

The problem is the threshold has been set so strictly that well-run active ETFs are now facing mandatory delisting. The government says it wants Korean assets to grow through capital markets, not real estate—but these rules are literally eliminating capital market products.

Third: Property Tax Has Gotten Stricter

Couples who co-own a single home now face property taxes calculated under multi-home owner rates. That means owning just one property could result in a higher tax bill. Taxpayers can opt into the single-home exemption, but the process is complex and many affected homeowners don't yet know this change applies to them.

The Lesson for Investors