When planning a move to the United States, most people focus squarely on visas, paperwork, and immigration strategies. However, there is another critical piece of the puzzle that frequently gets left behind the scenes: U.S. tax compliance. In reality, immigration and taxes are much more deeply intertwined than they appear at first glance.
Relocating to the U.S. doesn’t just change your country of residence; it fundamentally shifts your entire tax landscape. You will face brand-new U.S. tax obligations, including requirements to report and disclose income streams that previously didn’t require separate tracking, as well as assets that were formally outside the scope of U.S. oversight.
Ultimately, pre-immigration tax planning is one of the most underestimated aspects of moving to the United States. Even with a meticulously crafted immigration strategy, many fail to realize that the moment they become a U.S. tax resident, the IRS (Internal Revenue Service) casts a very wide net. Their rules apply not just to U.S.-source income, but also to foreign earnings, accounts, and assets. For this reason, tax planning should be treated as a core part of both immigration strategy and financial preparation for relocation.
When does someone become a U.S. tax resident?
The first and most vital rule to understand is that immigration status and tax residency do not automatically align. Holding a specific visa or even obtaining a green card does not always dictate a single, predictable tax regime. For federal tax purposes, the IRS determines residency based on specific statutory tests rather than your visa category.
A person is generally considered a U.S. tax resident if they meet one of two tests:
- The green card test, which applies to lawful permanent residents.
- The substantial presence test, which is based on the number of days physically spent in the United States.
The substantial presence test is calculated based on the number of days a person spends in the United States. The test generally requires at least 31 days of presence in the current year and a total of 183 days under a special three-year formula:
- All the days present in the current year;
- One-third (1/3) of the days from the preceding year;
- One-sixth (1/6) of the days from the year before last.
In practical terms, this means a person may not yet think of themselves as having fully relocated, but under U.S. tax rules, they may already be considered a U.S. tax resident.
The year of the move can be more complicated. A person may have what is known as a dual-status tax year, meaning that within the same calendar year, they are treated as a nonresident for part of the year and as a U.S. resident for tax purposes for another part of the year. Different tax rules apply to each period. As a nonresident, a person generally pays U.S. tax only on income from U.S. sources. Once they become a resident for tax purposes, the scope of reportable income becomes broader.
This is why tax status should be analyzed separately from visa status. In some cases, a person may become subject to U.S. tax rules earlier than expected, and that can heavily affect the financial strategy for the move.
Understanding worldwide income taxes
One of the most significant shocks for foreign nationals is the reality of U.S. worldwide income taxation. As a general rule, the United States taxes its citizens and tax residents on their global income, regardless of where the money is earned or where the business is located.
Consequently, your U.S. tax return must include not only salary or local business profits, but also income generated anywhere else in the world. This doesn’t just apply to multinational corporations or massive investment portfolios; it frequently triggers reporting for:
- income from a foreign company or an ownership interest in a business outside the United States;
- dividends from foreign companies;
- investment income and capital gains;
- rental income from real estate located outside the United States;
- compensation for remote work performed for a foreign client;
- interest earned on foreign bank accounts.
It is important to separate two questions:
- The first is whether additional U.S. tax is actually due.
- The second is whether the income must be reported.
Even if, in a particular situation, international tax rules or a foreign tax credit reduce the amount of U.S. tax due, or bring it down to zero, the obligation to disclose that income may still remain.
That is why, when analyzing taxes for people moving to the United States, the final amount of tax owed is only part of the picture. Proper reporting is just as important.
Double taxation is another issue that should be reviewed separately. The U.S. tax system provides mechanisms that may help reduce the risk of being taxed twice on the same income. One of them is the foreign tax credit, which allows certain taxes paid abroad to be credited against U.S. tax liability. In addition, the United States has tax treaties with a number of countries.
However, neither a foreign tax credit nor a tax treaty applies automatically. Whether these tools can be used depends on the type of income, the person’s tax status, and the ownership structure of the relevant assets. For this reason, the tax consequences should always be reviewed individually, especially when business activity or foreign investments are involved.
Taxes for entrepreneurs and business owners
For entrepreneurs, tax analysis is usually more complex than it is for employees. Taxes for entrepreneurs in the United States depend heavily on how the business is structured.
A person may operate:
- as a sole proprietor, meaning an individual business owner without a separate legal entity;
- through a partnership;
- through a corporation;
- through an LLC;
- or while continuing to own or manage a foreign company outside the United States.
The IRS treats business structure as a key factor in determining which tax forms must be filed. As a result, business structure becomes part of the broader tax and immigration strategy.
If, after moving to the United States, a person continues to manage a foreign company from within the U.S., additional tax risks may arise. In some cases, owners, directors, or shareholders of foreign corporations may be required to file separate informational forms, such as Form 5471. This is one reason immigration planning for entrepreneurs almost always requires earlier tax planning than a standard employment-based move.
There is another side to the issue as well. If a high-skilled professional or entrepreneur begins working independently in the United States without an employer, the IRS may treat that person as self-employed.
In that case, the person becomes responsible for managing their own tax obligations. This may include:
- filing an annual tax return;
- making estimated tax payments throughout the year;
- paying self-employment tax, if applicable.
Self-employment tax is a separate tax that includes contributions to Social Security and Medicare.
Unlike standard employment, where a company automatically withholds taxes from an employee’s paycheck, self-employed individuals carry 100% of the administrative responsibility. This mechanism catches many new residents off guard, making proactive cash-flow management and tax forecasting absolutely essential.
Additional financial reporting requirements
Another risk area that new U.S. residents often underestimate is reporting foreign accounts and assets. If, after relocating, you continue to hold foreign bank accounts, brokerage accounts, or other financial assets outside the United States, filing a standard tax return may not be enough. In certain cases, U.S. law requires separate informational filings.
Most frequently, taxpayers will encounter the following requirements:
- FBAR (Foreign Bank Account Report / FinCEN Form 114): This must be filed if a U.S. person (citizen or tax resident) holds a financial interest in, or signature authority over, foreign financial accounts that collectively exceeded $10,000 at any single point during the calendar year.
- Form 8938 (FATCA Disclosure): This form is required when the total value of specified foreign financial assets crosses certain regulatory thresholds. For single taxpayers residing in the U.S., this baseline generally starts at $50,000, though thresholds increase for married couples filing jointly or U.S. citizens living abroad.
Additional informational filings may also be required when a person owns foreign companies, trusts, or other foreign structures.
Common tax risks when moving to the United States
In practice, the same mistakes tend to come up repeatedly:
- failing to do tax planning before entering the United States;
- misunderstanding when U.S. tax residency begins;
- overlooking the worldwide income rule;
- failing to account for foreign accounts and assets;
- contacting tax professionals only after the move, when the business structure, income flows, and financial arrangements are already in place and harder to change without tax consequences.
For entrepreneurs, the cost of a mistake is usually higher. A poorly planned financial strategy before moving to the United States can lead not only to an unnecessary tax burden, but also to reporting issues, penalty risks, and complicated corrections later. That is why tax matters are best addressed before the move, not after the first message from a tax advisor or accountant.
How to prepare for tax changes before moving
Smart preparation begins with a holistic review of an applicant’s entire financial ecosystem. Before changing their country of residence, individuals must systematically evaluate their income streams, asset holdings, and corporate ties. This proactive approach allows taxpayers to forecast potential U.S. tax liabilities well before the first filing deadline.
An effective pre-immigration checklist typically includes:
- reviewing all sources of income, including income from outside the United States;
- analyzing the current business structure and how it will operate once U.S. tax residency begins;
- checking whether additional reporting may be required for foreign companies, accounts, and assets;
- assessing the risk of double taxation and the possible use of available relief mechanisms;
- consulting with a qualified tax professional before the move, not after it.
There is no one-size-fits-all blueprint. Tax planning for immigrants depends on a web of moving variables: the applicant’s visa type, exact arrival date, country of income origin, corporate architecture, and marital status.
Still, the basic principle remains the same: the earlier tax planning begins, the more options there are to build a sound financial model and reduce legal and financial risks after relocation.
Key takeaways
Moving to the United States is not only an immigration matter. It is also a tax matter. For high-skilled professionals, entrepreneurs, and investors, it is critical to understand in advance when U.S. tax residency begins, how taxes work when moving to the United States, what happens to foreign income, and what tax risks may be connected to foreign accounts, assets, and companies.
Careful preparation does not guarantee that there will be no complications, but it can make the process much more predictable. If you are planning to move to the United States and want to build a legally sound immigration strategy in advance, it is worth discussing your path to legal status with an immigration attorney and reviewing the tax consequences with a qualified tax professional before the move.
Shamayev Business Law guides clients through every step of the U.S. immigration process, crafting comprehensive strategies aligned with their long-term professional and financial goals.
Not sure whether you qualify for a U.S. visa? Start with a free case evaluation. The SBL team will evaluate your situation and help you understand your immigration options.
