What the law says
The Taiwan Relations Act, signed in 1979 after the U.S. switched formal diplomatic recognition from Taipei to Beijing, directs the United States to make available to Taiwan "such defense articles and defense services... as may be necessary to enable Taiwan to maintain a sufficient self-defense capability." The law does not specify what weapons to send or how much to spend, leaving those choices to the president and Congress.
How aid is delivered
U.S. support to Taiwan flows through two main channels. Foreign Military Sales let Taiwan buy American weapons, sometimes with U.S. financing. Foreign Military Financing provides grants or loans to help pay for those purchases. The 2023 National Defense Authorization Act authorized up to $2 billion per year in such grants for Taiwan through fiscal year 2027, though Congress must still appropriate the money each year.
The backlog
The State Department has reported a backlog of more than $20 billion in arms sales that Washington has approved for Taiwan but not yet delivered. The delays reflect strains on U.S. defense production lines, competing demand from Ukraine and other partners, and the long lead times for advanced systems such as F-16V fighters and anti-ship missiles.
Taiwan's own spending
Taiwan's 2025 defense budget was about $19.7 billion, roughly 2.5% of its gross domestic product. Officials in Taipei have proposed raising it above 3%, citing growing Chinese military activity. U.S. lawmakers in both parties have urged Taiwan to spend more, while Taiwanese leaders note that their economy is smaller and that they already face political pressure at home over the cost.
The case for more aid
Supporters argue that larger and faster deliveries would strengthen deterrence against a possible Chinese invasion or blockade, fulfill long-standing U.S. legal commitments, and reassure other Asian allies such as Japan and the Philippines. They point to Taiwan's role in global semiconductor supply and to the precedent set by Russia's invasion of Ukraine.
The case for caution
Skeptics warn that expanded military aid could provoke Beijing, accelerate an arms race, or draw the United States into a direct conflict. Some argue that Taiwan should bear more of the burden itself, that U.S. stockpiles are already stretched, or that diplomatic engagement with China is a safer path. Others question whether grant aid—rather than sales—is appropriate for a wealthy democracy.
The China factor
The People's Republic of China considers Taiwan part of its territory and has not renounced the use of force to achieve unification. Beijing routinely protests U.S. arms sales and has increased military exercises near the island. Washington's official "One China" policy acknowledges Beijing's position without endorsing it, and U.S. officials say they oppose any unilateral change to the status quo by either side.
Who decides
Decisions on aid to Taiwan are split among branches of government. The executive branch negotiates and notifies arms sales; Congress can block them and sets funding levels through annual defense authorization and appropriations bills. Voters influence the debate by electing presidents and members of Congress who set the direction of U.S. policy toward both Taipei and Beijing.