Business investment relief lets someone taxed on the remittance basis bring foreign income and gains into the UK without triggering a tax charge — provided the money goes into a qualifying UK business within 45 days. It is the most generous route ever offered for repatriating offshore wealth productively, it has been consistently underused, and its future is now defined by the end of the non-dom regime that created it.
What the relief does
Under the remittance basis, bringing foreign income or gains into the UK made them taxable. Business investment relief disapplies that: money remitted for the purpose of a qualifying investment is treated as not remitted at all, so the funds can be invested here without the charge that would otherwise apply.
There is no limit on the amount. A person could bring in millions of untaxed foreign income to fund a UK company, and provided the investment qualifies and stays qualifying, no tax arises on the remittance itself. That is the scale of the relief, and it explains why the conditions are precise.
Qualifying investments and target companies
The investment must be a subscription for, or acquisition of, shares or a loan to a target company. The company must be a private limited company falling into one of the defined categories:
- An eligible trading company, carrying on one or more commercial trades;
- An eligible stakeholder company, which exists to invest in eligible trading companies;
- An eligible holding company of a trading group;
- An eligible hybrid company — a private limited company which carries on one or more commercial trades, or may do so within the next five years, and holds investments in eligible trading companies. This category was added to accommodate structures that did not fit neatly into the others.
Property letting is the point most often got wrong, and in the taxpayer's favour. For business investment relief only, "trade" carries an extended meaning that expressly includes a business of generating income from land — the profits of renting or leasing property. A letting company does not have to clear the ordinary badges-of-trade hurdle to be an eligible trading company, which makes the relief considerably more useful to UK property investors than is generally understood. The extended definition applies for this relief and nothing else; the same company is still an investment business for every other tax purpose. What does not qualify is investment in listed companies, in partnerships, or in a company that has ceased trading.
The 45-day rule and chargeable events
Timing is unforgiving. The money must be invested within 45 days of being brought into the UK, and where an investment is later disposed of, the investor has 45 days from the proceeds becoming available to take them offshore again or reinvest them in another qualifying investment.
A range of potentially chargeable events can undo the relief: disposing of the holding, the company ceasing to be eligible, a breach of the start-up rules where the company was expected to begin trading within a set period, and — most commonly — the extraction of value by the investor or a connected person. Value extraction is drawn widely: a payment, a benefit, or anything received from the company other than ordinary commercial returns on the investment.
Each event has a mitigation route and a grace period, ranging from 45 days to two years depending on the event. Miss the window and the original remittance becomes taxable — in the year of the event, at the investor's rates, on money that may long since have been spent inside the business.
Where it sits now
The relief was built on the remittance basis, and the remittance basis has gone for new claims — replaced by the residence-based foreign income and gains regime. Its role has therefore narrowed to what remains: pre-2025 foreign income and gains held offshore by people who were taxed on the remittance basis, which is a very large pool of money that still cannot be brought into the UK without charge by any other route.
Alongside it sits the temporary repatriation facility, which allows designated pre-regime income and gains to be brought in at a reduced rate for a limited window — a different mechanism with a different arithmetic. For someone holding offshore funds and considering a UK business investment, the two need comparing rather than assuming: the facility's rate against the relief's conditions and its ongoing compliance burden. Business investment relief has also been announced as closing to new investments from April 2028, which turns the comparison into a question with a deadline.
Making it work in practice
The relief rewards planning and punishes informality. Confirm the target company's eligibility in writing before the money moves. Diarise the 45 days from the date funds arrive. Document the source of the funds clearly, because the relief operates by reference to specific income and gains and a mixed fund makes the analysis far harder. Avoid anything resembling value extraction — including a director's loan back to the investor, which is the single most common way the relief is lost. And build the exit into the plan: when the shares are sold, the 45-day clock starts again, and a family that has not planned for it discovers a tax charge attached to a successful exit.
Acumon advises on the relief, the surrounding remittance position and the investment structuring through non-dom tax and private client tax work, with international tax support where the funds sit in more than one jurisdiction. If you hold pre-2025 foreign income offshore and have a UK business in mind, the window for this route is now finite.