One of the principal financial goals for internationally mobile individuals is to build passive income: streams of money flowing in that do not require active work. Offshore investment portfolios, property rental income, interest on overseas deposits, and royalties can all contribute to financial independence. But each category of passive income is taxed differently, and the picture becomes more complex once you layer in UK residency status, the Foreign Income and Gains (FIG) regime for new arrivals, and double tax treaties.
This guide sets out how each major type of passive income is treated for UK tax purposes and what planning steps make a meaningful difference.
The Starting Point: Are You UK Resident or Non-Resident?
UK tax residence is determined by the Statutory Residence Test (SRT), which weighs up the number of days you spend in the UK alongside various "connecting factors." Most people who have left the UK properly and spend fewer than 16 days in the UK each year are non-resident. Those who maintain closer ties may be UK resident even if they live primarily abroad.
UK resident: You are taxable on your worldwide income, whether or not you bring it to the UK. From 6 April 2025, the remittance basis for non-domiciled individuals was abolished and replaced by the Foreign Income and Gains (FIG) regime — new arrivals with at least 10 years of prior non-UK residence can receive a four-year exemption on foreign income and gains (see below). For all other UK residents, worldwide income is taxable as it arises.
Non-UK resident: You are generally only taxable on UK-source income. Foreign passive income is usually outside HMRC's reach while you remain non-resident.
This distinction is the foundation for all passive income tax planning.
Dividend Income from Offshore Investment Portfolios
If you hold shares in overseas companies — either directly or through offshore funds — dividends you receive are foreign income.
For a UK-resident investor, foreign dividends are taxed at UK dividend tax rates (8.75%, 33.75%, or 39.35% depending on your marginal rate, as of 2026/27 rates). A dividend allowance of £500/year shelters modest amounts.
New UK arrivals eligible for the FIG regime (at least 10 years of prior non-UK residence) are exempt from UK tax on foreign income and gains — including foreign dividends — for their first four UK tax years. This exemption applies regardless of whether the income is remitted to the UK or kept offshore, and no annual charge applies. After the four-year FIG window closes, all worldwide dividend income is taxable as it arises.
Prior to 6 April 2025, non-domiciled individuals could elect the remittance basis to shelter unremitted foreign income. That regime has been abolished and no longer applies to income or gains arising from April 2025 onwards.
Offshore funds that are "reporting funds" (on HMRC's approved list) have their gains treated as capital gains rather than income. Non-reporting offshore funds have all gains — including those that are genuinely capital in nature — taxed as income on disposal. Choosing reporting funds is therefore an important decision for offshore portfolio construction.
Rental Income from Overseas Property
Overseas rental income is a common passive income stream for internationally mobile investors. From a UK tax perspective:
UK residents must declare overseas rental income on their Self-Assessment return (SA106 form). The income is taxed at your marginal income tax rate after allowable expenses — mortgage interest, agent fees, maintenance, insurance, and local property taxes incurred in generating the income. The UK mortgage interest restriction (Section 24) applies to UK property owned personally but does not apply to overseas property — full mortgage interest deductibility on overseas rental property is still available for individuals.
New UK arrivals in their FIG window (first four tax years of UK residence, with at least 10 years of prior non-UK residence) are exempt from UK tax on overseas rental income under the FIG regime. Once the FIG window closes, overseas rental income is taxable in the UK as it arises.
Non-residents are generally not subject to UK income tax on overseas rental income — only UK rental income is within HMRC's jurisdiction.
Double tax treaties often cover rental income, and the country where the property is located usually gets "first tax" under most treaties. The UK then gives credit for the overseas tax paid, reducing (but not always eliminating) the UK liability.
Interest Income from Overseas Deposits and Bonds
Interest earned on offshore bank deposits, fixed income instruments, and bonds is "foreign savings income" for UK tax purposes.
UK-domiciled residents must declare and pay UK income tax on offshore interest. The personal savings allowance (£500 for higher rate taxpayers; nil for additional rate taxpayers) shelters modest amounts. Above the allowance, interest is taxed at your marginal rate.
The Common Reporting Standard (CRS) means that HMRC will automatically receive information from the banks in participating countries about your account balances and interest paid. As of 2026, over 100 jurisdictions participate in CRS — including major expat hubs: UAE, Singapore, Cyprus, Jersey, Isle of Man, Cayman Islands, and many more. HMRC's data-matching capacity has increased significantly, and undeclared offshore interest is no longer a viable approach.
Offshore bonds and fixed-income investments can be structured within an offshore investment bond wrapper to defer income tax. Within the bond, income and gains roll up without annual tax. Tax is deferred until a "chargeable event" occurs (surrender, partial encashment exceeding the 5% annual withdrawal allowance, or the bond maturing). This can be powerful for higher earners who expect to be lower-rate taxpayers in retirement.
Royalties and Intellectual Property Income
Royalty income — from books, music, patents, software licensing, or other intellectual property — is less common but increasingly relevant in the knowledge economy.
UK-domiciled residents must declare royalties as income, taxed at marginal rates. Where royalties arise from UK sources (e.g., a UK publisher), they may be subject to withholding tax even if you are non-resident.
Double tax treaties generally contain provisions for royalties, typically reducing or eliminating withholding tax in the source country and giving the right to tax in the country of residence. The exact treatment depends on the specific treaty.
If you own intellectual property through an overseas company, the royalties may accrue to that company rather than to you personally — potentially deferring UK taxation. However, anti-avoidance rules (particularly the Controlled Foreign Company rules and the transfer of assets abroad legislation) may attribute such income to you in any case if the company lacks genuine substance.
The CRS Reporting Landscape
The Common Reporting Standard has fundamentally changed the playing field for offshore passive income. Financial institutions in participating countries are required to:
- Identify account holders who are tax resident in other CRS countries
- Report account balances, interest, dividends, and gross proceeds annually
- Send this information to the account holder's country of tax residence
HMRC receives CRS data and uses it to cross-reference Self-Assessment returns. If you have offshore accounts generating passive income that is not appearing on your UK tax return, HMRC's Connect system is likely to flag the discrepancy. The time to regularise your position is before HMRC writes to you — voluntary disclosure through HMRC's Worldwide Disclosure Facility typically results in lower penalties than a prompted investigation.
The FIG Regime: The Key Decision for New UK Arrivals
The remittance basis for non-domiciled individuals was abolished from 6 April 2025 and replaced by the Foreign Income and Gains (FIG) regime. The FIG regime is not a like-for-like replacement and operates on fundamentally different principles.
FIG-eligible new arrivals (at least 10 consecutive tax years of non-UK residence before the current period of UK residence, in their first four UK tax years): All foreign income and gains — including passive income from offshore portfolios, rental income, dividends, and interest — are completely exempt from UK tax for four years. No remittance condition applies; the income can be spent or invested in the UK without triggering a charge. No annual charge is payable. The personal allowance is retained.
All other UK residents (those not eligible for FIG, or in year 5+): Worldwide income is taxed on the arising basis — all foreign passive income is taxable as it arises, whether or not it is brought to the UK. The personal allowance is available in the normal way.
Historical note: Prior to April 2025, non-domiciled UK residents could elect the remittance basis annually, sheltering unremitted offshore income at the cost of losing personal allowances and, for long-term UK residents, paying a Remittance Basis Charge. That regime no longer applies to income and gains arising from April 2025 onwards.
Practical Structuring for Passive Income
Several structures can legitimise tax efficiency on passive income:
Offshore investment bond: Defers income tax on investment returns until encashment. Particularly useful for portfolios generating interest and dividends. Gains taxed as income on encashment, but top-slicing relief may reduce the effective rate.
Reporting fund wrapper: Ensures gains from offshore funds are taxed as capital gains (currently 18%/24% for individuals) rather than income (up to 45%), where possible.
Company ownership of overseas rental property: Using a non-UK company to hold overseas property can provide deferral of personal taxation on rental income, though there are compliance costs and substance requirements. Not appropriate in all jurisdictions.
Pension contributions: If you have a UK pension, contributing to it remains one of the most tax-efficient ways to shelter investment returns — growth within a SIPP is free from income tax and capital gains tax.
How Global Investments Can Help
Passive income planning sits at the intersection of investment strategy, tax planning, and regulatory compliance. Our team helps internationally mobile clients structure their portfolios to generate sustainable passive income in a tax-efficient way, taking into account their residency, domicile, and long-term financial goals. We work with tax specialists across key jurisdictions and can help you understand how the CRS affects your reporting obligations. Contact us to discuss your situation in confidence.
This article is for general information only and does not constitute financial, tax, or legal advice. Tax rules change and depend on individual circumstances. Always seek professional advice before acting. Investments can fall as well as rise in value.
This article is for general information only and does not constitute financial, legal or tax advice. Rules, prices and regulations change; verify current requirements with a qualified adviser before acting.