The numbers drawdown advocates don't show you
The pitch for drawdown is simple: invest your pension, withdraw 4% a year, and your pot grows over time. The reality is messier.
The FTSE 100 returned approximately 6.4% annualised over 20 years including dividends, according to IG market data. But that's before platform fees (typically 0.25-0.45%), fund charges (0.15-0.89% depending on active vs passive), and the tax drag on withdrawals above your personal allowance of £12,570.
A realistic net return in drawdown? Perhaps 4.5-5% in a good decade. Now subtract your income withdrawals. The commonly cited safe withdrawal rate for UK retirees is 3-3.9% — Morningstar's 2025 research puts it at 3.9% for a 30-year horizon with 90% confidence of not running out.
So drawdown gives you £3,900 a year from a £100,000 pot at a sustainable rate. The annuity gives you £7,584. That's 94% more income, guaranteed, from day one. And unlike drawdown, that income doesn't depend on what the FTSE does next week, next year, or next decade.
The entire drawdown thesis rests on one assumption: that equity markets will keep performing as they have historically. For anyone who lived through 2000-2003 or 2008-2009, that's a big assumption to stake your retirement on. For a deep dive into how different platforms handle drawdown fees, see our AJ Bell SIPP drawdown analysis.