According to new data published in March 2026 by the Organization for Economic Cooperation and Development (OECD), G20 GDP growth decelerated to 0.7% in the fourth quarter of 2025, down from 0.9% in the previous quarter, according to preliminary estimates.

The slowdown was driven by contractions in Canada and South Korea, both falling 0.2% after posting growth of 0.6% and 1.3% respectively in Q3. The United States saw growth plummet from 1.1% to just 0.2%, partly reflecting the impact of the government shutdown during the quarter.

Several major economies also lost momentum, with Turkey slowing from 1.0% to 0.4%, France from 0.5% to 0.2%, and India from 2.1% to 1.8%. However, some G20 nations bucked the trend with stronger performance.

Japan rebounded sharply from -0.7% to 0.3%, while Mexico accelerated from 0.1% to 0.9%. Germany, China, Australia, and Saudi Arabia also posted modest improvements in quarterly growth rates.

Despite the Q4 deceleration, annual G20 GDP growth edged up to 3.4% in 2025 from 3.2% in 2024, with India leading at 7.5% and Germany trailing at 0.5%. This mixed performance suggests continued uncertainty in global economic momentum heading into 2026.