SIPP vs Workplace Pension: Which Is Better for Your Retirement?

Under auto-enrolment, you contribute at least 5% of your qualifying earnings and your employer adds at least 3%, giving you 8% total. Many employers offer more generous matching — some will match up to 10% or even higher. The pension provider is chosen by your employer, typically a large scheme like NEST, NOW: Pensions, The People's Pension, or a provider like Aviva or Scottish Widows. Your investment choices are usually limited to a handful of funds — a default fund, a few risk-graded options, and maybe a Sharia-compliant fund. Fees vary but typically range from 0.3% to 0.75% annually.

A SIPP is a personal pension you open and manage yourself. You choose the provider (Vanguard, AJ Bell, Hargreaves Lansdown, Interactive Investor, and others), you choose the investments (from thousands of funds, ETFs, individual shares, and bonds), and you control the fees. SIPP platform fees can be as low as 0.15% with Vanguard or InvestEngine, though fund charges sit on top. You get the same tax relief as a workplace pension — basic rate taxpayers get 20% added automatically (so £80 in becomes £100), and higher rate taxpayers can claim an additional 20% through self-assessment. The key difference: no employer contributions go into a SIPP unless you arrange a salary sacrifice specifically directed there, which most employers won't do.

Never leave employer contributions on the table. If your employer matches 5% and you contribute 5%, that's a 100% instant return on your money before any investment growth. No SIPP investment will beat that. Even if your workplace scheme charges 0.75% and the default fund is mediocre, the employer match more than compensates. Some employers also offer salary sacrifice arrangements, where your pension contribution comes from pre-tax salary — saving you National Insurance (13.25% for most earners) on top of income tax. This is genuinely valuable and only available through workplace schemes.

If you've already maximised your employer match and want to save more for retirement, a SIPP gives you better options. You can invest in low-cost global index funds at 0.1% to 0.2% expense ratios, compared to the 0.4% to 0.75% often charged by workplace default funds. Over 30 years, a 0.5% fee difference on a £200,000 pot costs you roughly £60,000 in lost growth. A SIPP also makes sense if you're self-employed (no workplace pension available), if you've changed jobs frequently and have multiple small pension pots you want to consolidate, or if you want to invest in specific assets like individual shares or REITs that aren't available through your workplace scheme.

Most financial experts recommend using both. Contribute enough to your workplace pension to get the full employer match — this is non-negotiable free money. Then direct any additional pension savings into a SIPP where you control the investments and minimise fees. For example, if your employer matches 5%, contribute 5% to the workplace scheme and put an additional £200 a month into a SIPP invested in a global equity index fund. You get the employer match AND the low fees and wide choice. When you eventually retire, you can draw from both pots — they're treated identically for tax purposes.

Let's put numbers on it. Assume you have £100,000 in your pension at age 35 and it grows at 7% a year before fees for 30 years. At 0.2% total fees (a cheap SIPP with index funds), your pot at 65 is £706,000. At 0.75% total fees (a typical workplace scheme), it's £589,000. That's £117,000 less — purely from the fee difference. This is why the combination strategy works: you capture the employer match in the workplace scheme but direct extra savings to the lower-cost SIPP. Track your total pension contributions and projected pot using an app like SYM to make sure you're on course for the retirement you want.