The UK's shift to the Foreign Income and Gains (FIG) regime from April 2025 changes how foreign income is taxed. If you are a UK resident, get ready to possibly pay UK Income Tax on all foreign earnings—no more non-dom remittance basis.

UK Income Tax is generally payable on taxable income received by individuals including earnings from employment, earnings from self-employment, pensions income, interest on most savings, dividend income, rental income and trust income. The tax rules for foreign income can be very complex.

However, as a general rule if you are resident in the UK you need to pay UK Income Tax on your foreign income, such as:

• wages if you work abroad
• foreign investments and savings interest
• rental income on overseas property
• income from pensions held overseas

Foreign income is defined as any income from outside England, Scotland, Wales and Northern Ireland. The Channel Islands and the Isle of Man are classed as foreign.

If you are not UK resident, you do not generally have to pay UK tax on your foreign income. There are special rules if you work both in the UK and abroad.

The remittance basis rules which allowed non-UK domiciled individuals (often referred to as non-doms) to be taxed only on UK income and gains, is being abolished. From 6 April 2025, the concept of domicile as a relevant connecting factor in the UK tax system has been replaced by a new residence-based regime known as the Foreign Income and Gains (FIG) regime. 

HMRC has launched a new "Help for Hustlers" campaign to help people who are earning extra income, figure out if they need to pay tax on the additional earnings. The campaign runs until the end of March and focuses on five key areas where tax might apply:

1. I’m buying or making things to sell.
2. I’ve got a side gig.
3. I work for myself with multiple jobs.
4. I’m a content creator or influencer.
5. I rent out my property.

The good news is there are two £1,000 tax allowances — one for property income and one for trading income. If you have both types of income, you can claim £1,000 for each.

• Trading Allowance: If you make up to £1,000 from self-employment, casual services (like babysitting or gardening), or renting out personal equipment (such as power tools), this income is tax-free and does not need to be declared.
• Property Allowance: If you earn £1,000 or less from property-related activities (like renting out a driveway), you do not need to report it to HMRC or include it in your tax return.

These allowances cover all relevant income before expenses. If your income is under £1,000, it’s tax-free. If you earn more than £1,000, you can choose to either deduct the £1,000 allowance from your income or list your actual expenses when calculating your taxable profit.

However, if your side hustle income goes over £1,000 in a tax year, you may need to complete a self-assessment tax return. Keep in mind this only applies if you are actively trading or selling services. If you are just clearing out some old stuff and selling it, there is usually no need to worry about tax.

Tax on rental income from jointly owned property depends on ownership shares, unless part of a partnership. Married couples default to a 50/50 split unless they notify HMRC of a different income allocation based on actual ownership proportions.

When property is jointly owned with one or more individuals, the taxation of rental income depends on whether the rental activity is considered a partnership. Simply owning property together does not automatically qualify the arrangement as a partnership.

If the jointly owned property is not part of a partnership, the allocation of any profit or loss from the jointly owned property is typically based on each person's ownership share in the property. However, the co-owners can agree to divide the profits and losses differently than their ownership proportions, so it’s possible for one person to receive a larger or smaller share of the profits or losses than their share in the property itself. For tax purposes, the profit and loss share must reflect the actual agreement made by the owners.

In cases where the joint owners are married or in a civil partnership, the profits and losses are generally treated as being divided equally between them, unless:

• The entitlement to the income and the ownership of the property are split unequally between the spouses or civil partners, and
• Both parties must inform HMRC that they wish the division of profits and losses to align with their respective ownership shares in the property.

If these conditions are met, the profit and loss distribution will follow the agreed-upon ownership percentages, rather than the default equal split for married couples or civil partners.