What is the difference in tax implications when transitioning from an F1 visa to an H1B visa?

When transitioning from an F1 visa to an H1B visa, the tax implications change because H1B visa holders are considered resident aliens for tax purposes, while F1 visa holders are typically considered nonresident aliens. This means H1B visa holders are subject to U.S. income tax on their worldwide income, while F1 visa holders are generally only taxed on income from U.S. sources.