Last updated: June 2026.
The basic distinction
| Active funds | Passive funds | |
|---|---|---|
| Goal | Beat a benchmark index | Match a benchmark index |
| How they work | Fund manager picks investments based on research and judgement | Mechanically holds the same securities as the index, in the same weights |
| Typical ongoing charges | 0.50%-1.50% per year | 0.05%-0.30% per year |
| Trading activity | High, often turns over portfolio annually | Low, buys only when the index changes |
| Transparency | Holdings often disclosed quarterly | Holdings always visible (match the index) |
| Performance variability | High, wide range of outcomes | Low, tracks index closely |
The cost difference, and why it matters so much
The single most important factor in the active vs passive debate is cost. Active funds have to pay analysts, fund managers, research, trading commissions and marketing. Passive funds essentially run themselves. The cost gap of around 1% per year doesn't sound like much, but it compounds.
| Years invested | Active fund (7% gross return, 1.2% charge) | Passive fund (7% gross return, 0.2% charge) | Difference |
|---|---|---|---|
| 10 years | £17,908 | £19,672 | £1,764 |
| 20 years | £32,071 | £38,697 | £6,626 |
| 30 years | £57,435 | £76,123 | £18,688 |
| 40 years | £102,857 | £149,745 | £46,888 |
Same gross return assumption, only the charges differ. Over 40 years, the passive fund holder ends up with 46% more. That's purely from cost.
The performance evidence
The S&P Indices Versus Active (SPIVA) report tracks active fund performance against their benchmarks. The consistent findings, year after year, across markets:
- Over 1 year: roughly 40-60% of active funds beat their benchmark (depending on the year and market)
- Over 5 years: typically 20-30% beat the benchmark
- Over 10 years: typically 10-20%
- Over 20 years: typically under 10%
The longer the time horizon, the harder active funds find it to keep beating the index. And of the active funds that do outperform, persistence is poor, last decade's winners are rarely next decade's winners.
So why does anyone choose active?
Three legitimate reasons:
1. Specific areas where active genuinely outperforms more often
Smaller companies, emerging markets, and specialist sectors have stronger evidence for active outperformance. The reasons: less analyst coverage creates information advantages; market inefficiencies are larger; specialist expertise can be genuinely valuable.
Example: UK smaller company active funds have outperformed their passive equivalents more often than UK large-cap active funds. The advantage is smaller than headlines suggest, but real.
2. Specific outcomes the index doesn't deliver
If you want exposure to a theme that doesn't have a clean index (climate-focused infrastructure, AI hardware, biotech innovation), active funds can give you targeted exposure. Specialist thematic active funds have a role here.
3. Behavioural reasons
Some investors find it easier to stay invested through downturns when they feel a human manager is making decisions on their behalf. This is psychological rather than economic, but if it means you don't panic-sell in a crash, it can be worth the higher cost.
What a sensible UK portfolio looks like
For most UK savers, a sensible long-term portfolio structure is:
- Core (~70-90%): low-cost passive global equity tracker (FTSE All-World or MSCI ACWI). Optionally split into developed/emerging market trackers if you want explicit control.
- Bonds (~10-30%, depending on age and risk): a global bond index fund or UK gilts tracker provides stability and uncorrelated returns.
- Optional satellite (0-10%): small allocations to active managers in areas where you believe active adds value, UK smaller companies, emerging markets specialists, etc.
This is sometimes called a 'core-satellite' approach: low-cost passive at the core, selective active where you have conviction.
The wrapper matters as much as the funds
Whether you hold active or passive, the wrapper you use (ISA, pension, GIA) often matters more for net returns than the underlying funds. Tax-efficient wrappers can save more than the active/passive cost difference over a lifetime. See our how to start investing and ISA strategy guides.
Common mistakes
- Chasing past performance. A fund that did well last year is no more likely to do well next year than any other fund.
- Overpaying for closet index trackers. Some active funds charge active fees but hold portfolios very similar to the index. You pay 1%+ for what amounts to a tracker.
- Trading too much. Even with a passive portfolio, frequent switching erodes returns. Set up a sensible allocation and rebalance occasionally.
- Concentrating in home markets. UK investors often overweight UK equities. A FTSE 100 tracker is 30% in financials and 25% in mining/energy, concentrated risk that global trackers avoid.
- Confusing 'cheap' with 'good'. Cheapest isn't always best for passive, make sure the tracking error is small, the fund is large enough to be liquid, and it's domiciled in a sensible jurisdiction.
Frequently asked questions
Are passive funds always cheaper than active funds?
Almost always. Typical passive fund ongoing charges are 0.05-0.30% per year. Typical active fund charges are 0.50-1.50%. Over 30 years of compounding, a 1% difference can reduce your final pot by ~30%. The cost advantage is the single biggest factor driving passive's structural outperformance.
Do any active funds beat the market consistently?
Some do, but identifying which ones in advance is famously difficult. Academic studies show that around 80-90% of active funds underperform their benchmark over 10+ years. The minority that do outperform rarely keep doing so consistently. Past performance is a poor predictor of future outperformance.
Should I just buy a global tracker and forget about it?
For many UK savers, that's a perfectly sensible approach. A single global equity tracker (FTSE All-World, MSCI ACWI) gives you exposure to ~3,000 companies in 50+ countries at a cost of around 0.15%. Combined with a bond fund for stability if appropriate. Boring, but effective. The complications are: tax-wrapping, currency hedging, and whether your situation needs more sophistication than a single tracker provides.
Where does active investing genuinely add value?
Three areas have stronger evidence for active outperformance: smaller companies (where less analyst coverage creates information gaps), emerging markets (where market inefficiencies are larger), and specialist sectors (where deep expertise can matter). Even in these areas, the active premium is meaningful but not guaranteed.
What about ESG / sustainable investing, does it have to be active?
No. Passive ESG funds are now widely available, screening companies against environmental, social and governance criteria using rule-based methodologies. They're not as bespoke as active ESG funds but cost much less. For most ESG-conscious investors, a passive ESG-screened tracker is a reasonable starting point.