What Is a SIPP and How Does It Work?
A SIPP is a type of personal pension that gives you full control over your investment choices. It works like a tax-advantaged wrapper — money goes in, receives tax relief from HMRC, grows free of income and capital gains tax, and can be accessed from age 55 (rising to 57 from April 2028 under rules set by the FCA and detailed on MoneyHelper).
The mechanics are straightforward. You contribute money into the SIPP, and HMRC automatically adds basic-rate tax relief at 20%, as set out by HMRC. So a £100 contribution only costs a basic-rate taxpayer £80 — the other £20 comes from the government. Higher-rate (40%) and additional-rate (45%) taxpayers can claim back the extra relief through their self-assessment tax return, effectively reducing the net cost of a £100 pension contribution to £60 or £55 respectively.
Once inside the SIPP, your money can be invested in a wide range of assets. Most SIPP providers offer access to UK and international shares listed on major exchanges, thousands of funds and ETFs from providers like Vanguard, iShares and Fidelity, investment trusts, government and corporate bonds (including UK gilts currently yielding around 4.45%), and in some cases commercial property. The key distinction from a workplace pension is choice — you are not limited to a handful of pre-selected funds.
For more details, see our guide on pension tax relief.