New Jersey and the United Kingdom for Americans Abroad

New Jersey domicile and source income for a resident of the United Kingdom

New Jersey taxes residents on worldwide income and has a 30-day bright-line nonresident test for domiciliaries. Learn domicile rules, part-year filing, source income, and departure evidence. New Jersey taxes residents on worldwide income. A person domiciled in New Jersey can be treated as a nonresident only if all three conditions are met: no permanent home in New Jersey, a permanent home outside New Jersey, and no more than 30 days in New Jersey during the tax year. New Jersey source income remains taxable for nonresidents. This review covers a former New Jersey resident now living in the United Kingdom. A foreign residence or federal exclusion does not by itself settle a state filing obligation.

New Jersey rules that change the state-country file

Check the current New Jersey instructions for the year under review:

• New Jersey taxes residents on income from all sources, whether inside or outside New Jersey.
• A New Jersey domiciliary is treated as a nonresident only if there is no permanent home in New Jersey, a permanent home is maintained outside New Jersey, and the person spends no more than 30 days in New Jersey during the tax year.
• A nondomiciliary who maintains a permanent home in New Jersey and spends more than 183 days in New Jersey is treated as a resident for the full year.

Evidence to gather for New Jersey while living in the United Kingdom

Start with the departure timeline, foreign residence records, travel and workday calendar, prior New Jersey returns, and any agency notices. Add the United Kingdom-specific residence, tax, and account records.

• departure timeline and physical-presence history
• remaining state connections and ties
• state-source income records
• prior state returns and notices
• foreign residence and tax documents

Income sourcing and federal coordination

Record where services were performed, the payer, relevant property, and New Jersey workdays. These state-specific considerations can affect the result:

• The 30-day test is strict but clear; missing any condition can keep New Jersey residency.
• New Jersey source income, including rent or business income, can remain taxable after a move.
• Convenience-of-the-employer exposure is especially relevant for remote employees of New Jersey companies.

Traps and notice-response questions in New Jersey

Check these recurring issues. For a notice, preserve the full letter, response deadline, relevant return, and supporting records. Representation or a state-law opinion may require a separate specialist.

• Keeping a New Jersey home or spending more than 30 days in New Jersey while claiming nonresident status.
• Assuming a foreign assignment automatically changes New Jersey domicile.
• Failing to file both required returns in a year with resident and nonresident periods.

Residence and work records in the United Kingdom

The UK tax year runs from 6 April to 5 April, so UK assessments do not align automatically with a U.S. calendar-year return. UK residents normally report worldwide income; eligibility for the foreign income and gains regime from 6 April 2025 requires separate review. Retain dated United Kingdom permits, employment contracts, local returns, and the actual workday calendar. A permit does not replace the separate U.S. tax-home and qualifying-residence tests. Keep travel calendars, permits, leases, employer or client contracts, and local returns for each year.

How New Jersey domicile interacts with the United Kingdom residence

Domicile under New Jersey rules and tax residence in the United Kingdom answer different questions. the United Kingdom residence can affect local tax, social contributions, and residence evidence, but it does not by itself terminate New Jersey domicile. A former New Jersey resident living in the United Kingdom should keep the move date, foreign home, family location, and severed New Jersey ties in the same file. If the taxpayer retains New Jersey property, business activity, or workdays, those facts should be analyzed separately from the foreign residence. The two systems should be reconciled rather than treated as interchangeable.

Records to gather for this state-country combination

Start with the departure timeline, foreign residence records, travel and workday calendar, prior New Jersey returns, and any agency notices. Add the United Kingdom-specific residence, tax, and account records. Keep original-currency amounts and the exchange-rate method used. If the taxpayer has New Jersey-source property or business activity, add rent, repairs, taxes, insurance, management fees, invoices, payroll, and entity records. A strong file shows dated conduct rather than a statement of intent.

Scope and limits

This page is educational and records-focused. It is not a substitute for advice from a qualified tax professional. State and foreign filing obligations depend on the tax year and facts, and FileAbroad does not guarantee any specific result. Any paid review or preparation scope is agreed separately after a consultation.

Facts to review for New Jersey domicile in the United Kingdom

A former New Jersey resident now living in the United Kingdom needs a source-checked review of whether New Jersey domicile, source income, and departure-year filing still apply alongside the United Kingdom residence and U.S. filing.

• New Jersey taxes residents on income from all sources, whether inside or outside New Jersey.
• Keeping a New Jersey home or spending more than 30 days in New Jersey while claiming nonresident status.
• The UK Statutory Residence Test considers days, work, homes, and ties; 183 UK days is an automatic UK-residence test, not the only route to residence.
• The UK tax year runs from 6 April to 5 April, so UK assessments do not align automatically with a U.S. calendar-year return.
• UK residents normally report worldwide income; eligibility for the foreign income and gains regime from 6 April 2025 requires separate review.
• New Jersey nonresident status does not by itself remove New Jersey-source income filing if property, business, or work ties remain.

Relevant rules: New Jersey domicile and source-income rules; the United Kingdom residence, local tax, and FEIE records. Sources checked 2026-10-23; the filing position still requires review of your individual facts.