There’s an important rule that affects many expats working in the United States — and most people have never heard of it.

In this episode of Abroad in America, we break down totalization agreements, the treaties between the U.S. and certain countries that coordinate Social Security systems. These agreements help prevent expats from paying Social Security taxes to two countries at the same time and can protect future retirement benefits.

If you’re working in the U.S. on assignment, planning an international move, or splitting your career between countries, understanding how these agreements work can save you money and prevent costly mistakes.

We explain how the rules determine which country’s system you pay into, when temporary assignments may qualify for exemption from U.S. Social Security tax, and why a Certificate of Coverage is often the key document that makes everything work correctly.

You’ll also learn how totalization agreements can help combine work credits across countries so you can qualify for retirement benefits even if you haven’t worked long enough in just one system.

In this episode, we cover:

• What totalization agreements are and why they exist
• How they help prevent double Social Security taxation
• The difference between permanent work and temporary assignments
• Why a Certificate of Coverage matters
• What happens if your home country doesn’t have an agreement with the U.S.
• How work credits in two countries can sometimes be combined
• Why this is a key piece of expat financial planning

For expats, Social Security rules can feel confusing and overwhelming. Totalization agreements are one area where the system is actually designed to make things fairer and more manageable.

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