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It is registered with HMRC, regulated by The Pensions Regulator, and member-trustees usually exercise day-to-day control over how scheme funds are invested, including in commercial property and member loans to the sponsoring employer.

SIPPs are regulated by the Financial Conduct Authority and benefit from HMRC tax relief, with contributions, growth and most income sheltered from income tax andCapital-gains-tax/">Capital Gains TaxuntilWithdrawal.

The Bengen 4% rule is a US-based illustration. UK research, including studies referenced by the IFS and PPI, often suggests 3–3.5% may be more sustainable depending on assumptions about returns,Inflationand longevity.

For the 2025/26 tax year the standard annual allowance is £60,000, with a £3,600 gross limit for non-earners and a Money Purchase Annual Allowance of £10,000 once benefits have been flexibly accessed.

Auto enrolment requires UK employers to enrol eligible jobholders into a workplace pension with a total minimum contribution of 8% of qualifyingEarnings, of which at least 3% must come from the employer.

Commercial property and real estate investment trusts are permitted, but residential property and most tangibleAssetsfall outside HMRC rules and can trigger heavy tax charges.

Basic-rate relief of 20% is added at source by the SIPP provider; higher (40%) and additional-rate (45%) taxpayers can reclaim further relief through Self Assessment.