South Korea's 2026 tax reform plan does not legally reclassify married couples who jointly own one home as multiple-home owners for the Comprehensive Real Estate Holding Tax, the Ministry of Economy and Finance said, but it would materially change how some one-home households are taxed. The strongest criticism has focused on non-resident joint owners, whose combined basic deduction would fall to 800 million won from 1.8 billion won if they do not choose the one-household, one-home special provision, while resident joint owners can in some cases retain a combined 1.8 billion won deduction. From 2028, the fair market value ratio used to calculate the tax base will also diverge, with single-household, single-home taxpayers at 70% and joint owners of one home in regulated zones who do not elect the special provision facing 80%, the same ratio applied to multiple-home owners. More than 5,300 public comments had been posted by Aug. 12, most opposing tougher taxation, and Deputy Prime Minister and Finance Minister Koo Yun-cheol said the government would revise the package during the legislative notice period through Aug. 20 before submitting it to the National Assembly.