Why DIY Investing Is Like Your Diet

You Don't Need a Personal Chef

Most people eat perfectly well without a personal chef. They learn the basics of nutrition, buy decent ingredients, and cook reasonable meals. They're not gourmet chefs, but they're healthy.

Investing is the same. You don't need a financial adviser to manage a simple portfolio. You need:

• A basic understanding of what you're doing
• Access to a platform (plenty of good ones in the UK)
• A handful of sensible funds
• The discipline to stick with it

What Most People Actually Need

For the vast majority of UK investors, a simple portfolio looks like:

1. A global equity index fund — tracks thousands of companies worldwide
2. Perhaps a bond fund — for stability, especially as you get older
3. Your workplace pension — already doing the heavy lifting
4. Inside an ISA — for tax-free growth

That's it. Two or three funds. Rebalance once a year. Top up monthly.

The Fee Problem

Here's where the "just hire someone" argument breaks down. Financial advisers and actively managed funds typically charge 1-2% per year.

That sounds small. It isn't.

On a £100,000 portfolio over 25 years at 7% growth:

• 0.2% fee (index fund): £500,000
• 1.5% fee (adviser + active fund): £383,000

That 1.3% difference cost you £117,000. Same market, same returns — just different fees.

Research from S&P's SPIVA scorecard consistently shows that over 90% of actively managed UK equity funds underperform their benchmark index over 15 years. You're paying more for worse results.

How to Build a Simple DIY Portfolio

Step 1: Choose a Platform

Popular UK investment platforms include:

• Vanguard Investor (low cost, simple)
• Interactive Investor (flat fee, good for larger portfolios)
• AJ Bell (flexible, good range)
• Fidelity Personal Investing (strong fund selection)

Step 2: Open a Stocks and Shares ISA

Maximum £20,000/year, all growth tax-free.

Step 3: Pick Your Funds

A single global index tracker gets you started. Something like:

• A global equity index fund (tracks developed world markets)
• Add a bond allocation if you want less volatility

Step 4: Set Up a Monthly Direct Debit

Automate it. £100, £200, £500 — whatever you can afford. The amount matters less than the consistency.

Step 5: Leave It Alone

Seriously. Check it quarterly, rebalance annually, but don't touch it otherwise.

When You Might Need an Adviser

DIY isn't for everyone or every situation. Consider an adviser if:

• Your finances are complex (multiple pensions, inheritance tax planning, business ownership)
• You need to draw down a pension in retirement
• You genuinely cannot face doing it yourself and would otherwise do nothing

But for the basics — saving, investing, building wealth — you can absolutely do it yourself.

Research Note

The evidence against active fund management is comprehensive. The SPIVA Europe Scorecard (S&P Dow Jones Indices, published annually) shows that the majority of active fund managers underperform over almost any time period. Eugene Fama and Kenneth French's seminal work "Luck versus Skill in the Cross-Section of Mutual Fund Returns" (Journal of Finance, 2010) provides the academic foundation for index investing.