Comparison Guide Β· Updated July 2026
Discretionary Fund Management vs DIY Investing 2026
Discretionary fund management hands day-to-day investment decisions to a professional manager for a fee typically totalling 1.5%β2.5% per year, often with a minimum investment. DIY investing keeps you in full control at a far lower cost, but requires your own time, research and discipline. Choosing between them in 2026 depends on portfolio size, complexity and how much time and confidence you have to manage it yourself.
TL;DR
- Discretionary fund management: Professional makes decisions for you; all-in cost often 1.5β2.5%/yr; usually has a minimum investment
- DIY investing: You make all decisions; can cost under 0.5%/yr with low-cost funds; requires your own time and research
Side-by-Side Comparison
| Feature | Discretionary Fund Management | DIY Investing |
|---|---|---|
| Who makes decisions | Professional manager, within agreed parameters | You, entirely |
| Typical all-in annual cost | 1.5%β2.5% (management + fund + platform) | Often 0.1%β0.5% with low-cost funds |
| Minimum investment | Often Β£50,000βΒ£250,000+ | None, or platform minimums only (often low) |
| Time required from you | Minimal β periodic reviews | Varies β a few hours a year to ongoing active management |
| Suitability duty | Ongoing FCA suitability obligation on the manager | None β execution-only, you bear the responsibility |
| Best for | Larger, complex portfolios wanting hands-off oversight | Cost-conscious investors comfortable managing their own portfolio |
How Discretionary Fund Management Works
A discretionary fund manager is authorised to buy and sell investments on your behalf without seeking approval for each individual transaction, operating within a mandate agreed with you covering risk level, objectives and any restrictions (such as ethical exclusions). This model suits investors who want ongoing professional oversight of a meaningful sum of money without being involved in day-to-day decisions, and who are willing to pay the associated fee for that convenience and the manager's ongoing suitability obligation.
How DIY Investing Works
DIY investing means using a direct-to-consumer investment platform to buy and hold funds, investment trusts or shares yourself, inside a stocks and shares ISA, SIPP or general investment account. You choose your own asset allocation, select the underlying investments, and are responsible for rebalancing and monitoring the portfolio over time. Because there is no professional manager fee layer, total costs can be a small fraction of a discretionary service, particularly when using low-cost index tracker funds.
Fee Impact Over the Long Term
A 1.5β2 percentage point fee gap between discretionary management and a low-cost DIY portfolio compounds significantly over decades. On a large, long-held portfolio, this difference can represent a substantial proportion of the eventual pot size, even before considering whether the discretionary manager's investment decisions add value beyond what a low-cost passive portfolio would achieve on its own. This does not mean discretionary management is never worthwhile β but the fee should be weighed explicitly against the specific value being provided (tax planning, behavioural coaching, bespoke complexity) rather than assumed to pay for itself through superior returns.
Which Should You Choose?
Discretionary fund management can suit investors with substantial, complex portfolios who want to delegate ongoing decisions entirely and value the professional relationship, provided the fee is transparent and justified by the service received. DIY investing suits the majority of investors who are comfortable with a simple, low-cost approach β such as a small number of index tracker funds inside an ISA or SIPP β and who prioritise minimising costs over delegating decision-making.