US May Cut China Tariffs by 20% as Supreme Court Ruling Looms

The United States Supreme Court is set to deliver a final ruling this Friday on former President Donald Trump's global tariff strategy, a decision widely viewed as a turning point for U.S.–China trade relations. Chinese companies and affected industries are closely monitoring the outcome, which could reshape trade flows, cost structures, and corporate financial planning.

The ruling focuses on tariffs imposed under the International Emergency Economic Powers Act (IEEPA), including the 10% 'fentanyl tariff' and the 10% 'reciprocal tariff' applied to China. If the court rules these measures unlawful, U.S. tariffs on Chinese goods could be reduced by up to 20%, and companies may be eligible to apply to U.S. Customs and Border Protection for refunds estimated to reach hundreds of billions of dollars.

After returning to office, Trump reinstated his strategy of using tariffs to push manufacturing back to the United States. In April 2025, he announced a universal 10% tariff and imposed additional 'reciprocal tariffs' ranging from 10% to 50% on most countries. Citing the fight against fentanyl sources, his administration also introduced an extra 10% tariff on China, Canada, Mexico, and others under IEEPA authority.

However, these tariff measures have faced strong legal challenges from the outset. Both the U.S. Court of International Trade and the Federal Circuit Court of Appeals ruled that tariffs imposed under IEEPA exceeded presidential authority and violated congressional limits. During Supreme Court oral arguments in November 2025, most justices similarly expressed skepticism toward the government's position.

Forecasting platforms currently estimate only a 22%–30% likelihood that Trump's tariff policy will remain intact, while the probability of a full overturn stands at 70%–78%. Multiple research institutions also believe the chances of reversal are high. Several U.S. companies have already filed legal claims in advance, and conservative estimates suggest total tariff refunds could surpass USD 100 billion. This would inject short-term liquidity into U.S. manufacturing and retail sectors, while enabling Chinese exporters to resume circulation of delayed or unsold goods in the U.S. market, potentially revitalizing trade momentum.

Although the Trump administration insists the tariffs are justified, Trump has publicly expressed concern that a reversal would seriously damage U.S. manufacturing competitiveness. The tariffs have also become a politically symbolic issue ahead of the 2026 election cycle. Advisors indicate that if IEEPA-based measures are invalidated, Trump may pivot to Section 232 (national security tariffs) or Section 301 (unfair trade tariffs). However, these mechanisms involve longer review processes, stricter evidence requirements, and narrower scope, meaning the U.S. could temporarily lose its ability to impose tariffs quickly — creating a short strategic window for Chinese and American businesses.

Since the tariffs were introduced, inflation pressures in the United States have remained elevated, with higher import prices driving up consumer spending. The government has already issued temporary tariff exemptions for certain critical sectors. If the tariffs are overturned, U.S. CPI growth could ease significantly by the second quarter of 2026. The global 'decoupling' trend may slow temporarily, China's export structure could stabilize, cross-border e-commerce and manufacturing orders may rebound, and the renminbi could see a short-term strengthening. Some Southeast Asian countries may also face pressure as production capacity shifts partially back to China.

Overall, the likelihood of a U.S. tariff reduction on China is considered high, but the final outcome depends on Friday's Supreme Court ruling. Chinese enterprises and related industries are urged to closely track developments, prepare response strategies in advance, and seize potential opportunities for recovery and growth.