Before a Foreign Citizen Becomes a United States Tax Resident

Calculate U.S. tax residence on a real calendar

For people who are not U.S. citizens, the green-card test and substantial-presence test are central U.S. residence rules. The substantial-presence calculation generally counts current-year days and fractions of days from the prior two years, with specified exceptions. An individual's tax residence starting date and any dual-status year can require further analysis.

Collect passport travel history, visa classification, permanent-residence milestones, work dates, and a calendar of family moves. Check whether treaty residence or a closer-connection exception is relevant with a specialist, rather than assuming a short-term assignment remains outside U.S. worldwide taxation. State residence can begin under its own rules.

Example — Haruto accepts a U.S. assignment after several years of frequent visits. His preparer counts the relevant days across three calendar years and tests the first day of residence before a planned sale of company shares.

Make a pre-arrival asset and ownership inventory

List foreign bank accounts, shares, pooled funds, companies, partnerships, trusts, insurance contracts, real estate, and pensions. Include legal ownership, acquisition dates, cost basis, income, control rights, and existing valuations. A U.S. resident alien is generally taxed on worldwide income; foreign assets can also introduce information returns independent of whether an asset produced much income.

Do not assume that becoming a U.S. resident increases the U.S. basis of an asset to its value on arrival. Review the particular property and law before realizing a built-in gain. A local pension or company that was routine abroad may have a complicated U.S. classification. Keep original documents and translations while they remain easy to obtain.

Example — Sofia owns an overseas apartment and a small family company. She preserves purchase records and ownership agreements before arriving; a valuation is useful for analysis but is not automatically a new U.S. tax basis.

Examine pooled funds and business interests early

Some non-U.S. pooled funds may be PFICs for U.S. tax purposes. A foreign company can create separate classification and reporting questions. Neither the local name nor the fact that the product is held in a pension conclusively settles the U.S. answer. Selling or restructuring before arrival can have tax consequences in the departure country.

Ask advisers in both countries to compare retaining, selling, or reorganizing each material holding under the actual timeline. Record the tax on any pre-arrival transaction, the cost of U.S. reporting after arrival, and the investment or business value lost through a rushed sale. The answer for a family-owned company may differ sharply from the answer for a retail fund.

Example — Fatima owns two similarly marketed European funds. Her specialist identifies their legal issuers and ownership form separately rather than concluding that both have the same U.S. treatment from their names.

Review trusts, pensions, and family transfers

Foreign trusts can create U.S. reporting for owners, beneficiaries, contributors, or people receiving certain distributions. Private pension arrangements and life insurance contracts can be classified differently under U.S. law. A move can also change the tax outcome of a future gift or inheritance to a U.S. family member.

Collect trust deeds, financial statements, pension plan terms, contribution and distribution histories, insurance illustrations, and beneficiary forms. Before adding a U.S.-resident trustee, changing an ownership interest, or receiving a trust distribution, seek a document-specific review. An incomplete summary of a foreign arrangement is rarely enough.

Example — Kenji is named successor trustee of a family trust just before his move. The family has counsel evaluate whether he should accept the role and what information the U.S. preparer would need if he did.

Prepare the first U.S. filing year

Ask a preparer to map U.S. and state returns, any dual-status filing, foreign tax credits, foreign-account reports, and asset-specific forms. The IRS publishes a checklist for new immigrants identifying common international information returns. A local return may use a different tax year, creating timing and currency mismatches.

Assign each asset a document owner and a review date. Confirm U.S. banking and custody, healthcare coverage, payroll withholding, and what happens if the assignment ends early. Revisit the analysis after the first full U.S. year, because a move-year filing may differ from later years.

Separate income tax residence from transfer-tax questions

The U.S. income-tax residence tests do not automatically resolve estate-tax domicile or the treatment of gifts. A newly arrived professional may have significant property abroad and a non-U.S. spouse. The legal ownership of U.S. real estate, beneficiary forms, and an existing overseas will can become consequential long before retirement.

Have estate counsel map each spouse's citizenship, domicile facts, asset situs, marriage-property regime, and intended beneficiaries. Ask whether existing powers of attorney and wills can be used after the move, and whether a new document would revoke an old one. Do not retitle a family home or foreign company just to simplify a bank application without asking about gift and estate consequences.

Example — Lucia arrives with a non-U.S. spouse and shares in a family business. The couple coordinates U.S. and home-country estate counsel before naming trustees or changing account ownership.

Plan for stock awards and a possible departure

Restricted stock, options, and bonuses can relate to work performed before and after the arrival date. A payment received in the United States is not necessarily attributable entirely to U.S. work. Obtain grant, vest, exercise, payroll-withholding, and workday records from the employer before the first return. Identify which country taxes each service period and whether tax paid in a later year can be credited.

Also test an early end to the assignment. A future move out of the United States may require another residence calculation, account-access review, and examination of expatriation rules for some long-term permanent residents. A five-year plan should include both the intended stay and a plausible departure, even when the family hopes to remain indefinitely.