South Korea’s ruling and opposition parties are preparing for a 100-day legislative confrontation beginning September 1, while the government is expected within days to submit its 2027 budget proposal to the National Assembly. The budget is expected to exceed 800 trillion won for the first time, although parliamentary materials describe it as roughly 800 trillion won, and senior policymakers have suggested it could contain features unseen in South Korea for decades. The proposal is being prepared as the economy is expected to record its strongest growth in about a decade, excluding periods distorted by major shocks. The session will cover real estate supply and price stabilization, legislation to abolish prosecutors’ supplementary investigation authority, capital-market reforms and a proposed 100 trillion won Future Response Fund financed by additional semiconductor-related tax revenue. The National Assembly will hold a plenary session on September 3, policy speeches on September 7–8, government questionings on September 9–11 and September 14, further plenary sessions on September 17 and October 1, and a three-week state-affairs audit beginning October 6. The session will also include confirmation hearings for 10 personnel reshuffles announced by Cheong Wa Dae. The Democratic Party of Korea is prioritizing housing, small-business support, capital-market reform, semiconductor, data-center and physical-AI projects, while the People Power Party has selected 133 legislative tasks across seven areas and is preparing filibusters. Investors will also assess South Korean economic data, U.S. employment figures and Federal Reserve signals after Jackson Hole.