On 28 October, Budget day, HM Treasury published a consultation entitled “Modernising taxation of foreign sovereign investments”. It proposes that from 1 January 2029 “the current non-codified sovereign immunity from direct tax regime will be modernised with a new sovereign tax status”, putting the UK taxation of sovereigns “on a statutory footing for the first time”. Sovereign wealth funds, central banks and a new category of State-operated Overseas Pension Funds (SOPFs) would have to apply to HMRC for the status, including those that benefit from immunity today. Comments close on 20 January 2027.
The Treasury expects the main effect to be “to bring sovereigns’ returns from directly held UK real estate into the charge to tax for the first time”. Holders of the status would be taxed like other non-residents on income from UK land, on gains from UK land and certain property-rich vehicles, and on UK trading income. The Treasury’s Budget costings score the measure at £495m in 2028-29, rising to £690m in 2029-30.
What stays exempt, and what is offered instead
UK-source interest stays exempt, and dividends remain generally untaxed, as for other non-residents. So do the investment-management profits of sovereigns’ UK investment offices. Funds that qualify as SOPFs keep an exemption on chargeable gains, “in line with treatment of other overseas pension funds”. Sovereign wealth funds would not get it.
The main concession is a bespoke route into real estate investment trusts. Sovereigns could control and wholly own a UK REIT while paying 15% on property income distributions, including through an optional “sovereign REIT holding company” taxed at 15% on gross distributions with no deductions. Assets newly brought into the gains charge would be rebased to their market value on 1 January 2029, so that only later gains are taxed. A time-limited stamp duty land tax relief for restructuring would apply from 2028 until at least 31 December 2030 in England and Northern Ireland, with clawback if the acquiring entity changes control within three years.
Why it matters for sovereign and pension portfolios
As CMS, a law firm, put it: “Directly held UK property is where the impact will be felt most.” For a sovereign wealth fund that owns offices or warehouses directly, rent that is untaxed today would become taxable from 2029, and so would future gains. The likely response is restructuring into a UK company or a sovereign REIT. The Treasury itself asks respondents: “How will these structures likely be financed?”
The split between categories is a governance question. A state pension or social security fund that meets the SOPF definition keeps its gains exemption; a sovereign wealth fund holding the same asset does not. Since a SOPF must be operated exclusively or almost exclusively to provide retirement benefits, funds with mixed mandates must establish on which side of the line they fall. The Treasury also plans to remove jurisdictional immunity for these tax liabilities, so that HMRC and UK courts can enforce them. Sovereigns would also count as qualifying institutional investors for fund regimes such as long-term asset funds. And because interest and dividends stay exempt, listed equity and debt keep a tax advantage over direct property, a gap that could tilt allocations at the margin.
The shift may prove smaller than it looks. The Treasury says the impact on sovereigns’ wider UK investment “is also expected to be limited”, and that the new benefits will be “comparable to, or more generous than, those provided by most other countries”. Nor is the timetable assured. Britain consulted on a similar overhaul in 2022, when it proposed “reforms from April 2024”, yet the Treasury still describes the current regime as one that “is not codified”. As CMS notes, “The proposals remain subject to consultation and may change.”
What to watch
- 20 January 2027: the consultation closes; a technical consultation on draft legislation follows, ahead of Finance Bill 2027-28.
- 2028: the stamp duty relief for restructuring is due to start, and HMRC expects to begin accepting applications no later than six months before the new rules take effect.
- 1 January 2029: sovereign tax status takes effect and affected assets are rebased.
Sources
- Modernising taxation of foreign sovereign investments, HM Treasury, 28 October 2026
- Modernising Taxation of Foreign Sovereign Investments: Sovereign Tax Status Regime (consultation document), HM Treasury, 28 October 2026
- Budget 2026 document, HM Treasury, 28 October 2026
- Budget 2026 (Print), HM Treasury, 28 October 2026
- Autumn Budget 2026 - modernising the UK tax treatment of foreign sovereign investors, CMS, 28 October 2026
- UK launches consultation to upgrade Sovereign Investor tax-treatment, HM Treasury, 4 July 2022