Savings & Investing

Should I Use a Financial Adviser or Invest Myself? — Cost vs Value Guide

Compare using a financial adviser versus DIY investing. When professional advice is worth the fees, when to invest yourself, and how to decide based on your situation.

Savings and investment information is for educational purposes only. The value of investments can go down as well as up. Cash savings up to £85,000 per person per institution are protected by the FSCS.

Choosing between professional financial advice and managing your own investments is a significant decision. Here’s when each makes sense.

DIY Investing vs Financial Adviser — Quick Comparison

Factor DIY Investing Financial Adviser
Cost Platform fee (0.1-0.45%) + fund fees (0.1-0.5%) Adviser fee (0.5-1%) + platform + fund fees
Total annual cost on £100k £200-£950 £1,200-£2,450
Decision-making You Adviser recommends, you decide
Tax planning Basic (you research) Professional optimisation
Behavioural support None Stops you panic-selling
Time commitment 2-5 hours/month Minimal
Complexity handled Low to medium Any level

When DIY Investing Makes Sense

Managing your own investments works well if you:

  • Have simple finances — single income, standard pension, basic ISA needs
  • Are comfortable with risk decisions — choosing a fund allocation and sticking to it
  • Are willing to learn — understand index funds, diversification, rebalancing
  • Have time — happy to research and monitor periodically
  • Want to minimise costs — every 1% in fees reduces long-term returns significantly

The Cost of DIY

Platform Annual fee Fund cost (index) Total on £100k
Vanguard 0.15% 0.06-0.23% £210-£380
AJ Bell 0.25% 0.06-0.23% £310-£480
Hargreaves Lansdown 0.45% 0.06-0.23% £510-£680
Interactive Investor £143 flat 0.06-0.23% £203-£373

A Simple DIY Portfolio

Approach What to buy Effort
One-fund solution Global index fund (e.g., Vanguard FTSE Global All Cap) Set up and forget
Two-fund split Global equities + UK bonds Rebalance annually
Target-date fund Automatically adjusts as you age Zero effort

When You Need a Financial Adviser

Professional advice is most valuable for:

Complex Situations

Situation Why advice helps
Pension transfers (DB to DC) Legally required for pots over £30,000
Retirement income planning Drawdown strategies, tax-efficient withdrawals
Inheritance tax planning Trusts, gifts, estate restructuring
Business owner exit Tax-efficient extraction, EIS/SEIS
Divorce financial settlement Pension sharing orders, asset splitting
Large lump sum (£100k+) Optimal deployment across tax wrappers
Care fees planning Protecting assets, local authority rules

High Net Worth

Portfolio size DIY cost savings Adviser value-add Verdict
Under £50,000 £250-£500/year Limited DIY usually sufficient
£50k-£250k £500-£2,000/year Moderate Consider one-off advice
£250k-£1m £2,000-£8,000/year Significant Ongoing advice often worthwhile
Over £1m £8,000+/year High Almost always worth it

Life Transitions

  • Approaching retirement and need a withdrawal strategy
  • Received an inheritance or windfall
  • Getting married or divorced
  • Starting or selling a business
  • Becoming seriously ill

The Value an Adviser Adds

Research by Vanguard suggests advice can add around 3% per year in net returns through:

Source of value Estimated annual benefit
Behavioural coaching (stopping panic moves) ~1.5%
Tax-efficient investing (ISA/pension/CGT) ~0.75%
Asset allocation and rebalancing ~0.35%
Withdrawal sequencing in retirement ~0.4%
Total potential value ~3%

Minus the 1% fee, you’re still ahead by ~2% per year — but only if the adviser is good.

The Middle Ground — One-Off Advice

You don’t have to choose between full-time advice and going completely solo:

Service Cost What you get
One-off financial plan £500-£2,000 Full review, recommendations, no ongoing fees
Hourly consultation £150-£300/hour Specific questions answered
Robo-adviser 0.25-0.75%/year Automated portfolio management, some tax optimisation
Online financial planning £250-£500 Cashflow modelling and basic recommendations

How to Find a Good Adviser

Check How
FCA registered Check the Financial Services Register at register.fca.org.uk
Qualifications Look for Chartered Financial Planner (highest standard)
Independent vs restricted Independent can recommend from the whole market
Fee transparency All fees should be clearly stated upfront
Reviews Check VouchedFor or Unbiased
Initial meeting Most offer a free initial consultation

Decision Checklist

Question If yes →
Are my finances simple (PAYE, one pension, basic ISA)? DIY is fine
Do I have a DB pension transfer decision? Must use an adviser
Am I comfortable choosing and managing investments? DIY is fine
Do I have over £250,000 in investments? Consider ongoing advice
Am I approaching retirement? One-off or ongoing advice
Do I need IHT or complex tax planning? Use an adviser
Am I worried about making mistakes? Start with one-off advice

Sources

  1. FCA — Investing
  2. MoneyHelper — Investing