DIY investing vs a financial advisor: what you give up either way

Investing on your own costs little more than the expense ratios of the funds you hold, because trading is often free: Fidelity, for one, charges $0 for online US stock and ETF trades and has no account minimum. A fee-only financial advisor costs a median $4,500 a year for ongoing planning or 1% of assets if they manage the money. The real choice isn’t price against expertise. It’s which mistakes you’re more likely to make: paying for help you don’t need, or skipping help on a decision that costs far more than the advice would.

For most people who already invest well, the answer is in the middle: keep doing it yourself, and pay a planner for the parts that aren’t about picking funds.

The short version

Our guide to whether you need a financial advisor has the signs for either side. This one is about what each option costs you and what it leaves out.

What doing it yourself gets right

The basics are within reach for almost anyone: a few broad, low-cost funds, regular contributions, and the discipline to leave them alone. That last part is the hard part. Morningstar estimates that over the 10 years to the end of 2025 the average dollar in US funds earned 8.7% a year while the funds themselves returned 9.9%, a gap of 1.2 points that comes from investors’ own buying and selling. If you invest steadily and don’t react to headlines, you aren’t paying that cost, and you keep the fee too.

Low costs matter more than most choices you’ll make. The Labor Department’s own example: $25,000 left to grow for 35 years at a 7% return becomes $227,000 if fees take 0.5% a year, and $163,000 if they take 1.5%. That one percentage point cuts the ending balance by 28%. A DIY investor who holds low-cost funds starts on the right side of that math.

What doing it yourself tends to miss

The investing is rarely where DIY goes wrong. The work around it is:

• Which account holds what. Holding investments that throw off taxable income, such as bond funds, in a taxable account can cost more in tax each year than holding them in an IRA. See asset location.
• The order you spend from in retirement, and whether a Roth conversion makes sense in low-income years.
• Beneficiary designations that are out of date. On retirement accounts and insurance, the designation generally decides who inherits, whatever your will says.
• Concentration. Company stock, a rental property or an inheritance can quietly become most of your net worth.
• Insurance and estate gaps that no portfolio covers.
• A second opinion before a big, one-off decision: a pension choice, exercising stock options, selling a business.

None of these is hard to learn about. They’re hard to notice when you’re the only one looking.

What each costs

The rows are worked from the medians in our fee report: three hours at $300, a $2,000 plan divided over three years, and 1% of $750,000. Recheck them against your own quotes.

Two things the chart shows. First, the gap between doing it all yourself and getting a yearly check is small next to the decisions that check covers. Second, a percentage fee grows with your balance, and at this size it costs more than a flat planning fee. Our guide to flat fee vs percentage of assets finds the break-even, about $450,000.

Your time has a cost too. If running the money takes a few hours a month and you dislike every one of them, count that.

When doing it yourself is the better choice

• Your money life is simple and you like running it. Salary, workplace plan, IRA, a taxable account, no big decision ahead.
• You’ve already held through a bad market without selling.
• You’d pay a percentage for a portfolio you could hold yourself. If what you want is planning, pay for planning.
• You’re early in your career. Saving rate and costs matter most now, and both are in your control. See advisors for early-career professionals if you want a one-off check.

When an advisor is the better choice

• Retirement is within ten years. The withdrawal plan, Social Security timing and taxes in the first years are where errors compound. Our guide to advisors for retirement covers what that work involves.
• A large, one-off decision. Stock options, an inheritance, a business sale, a divorce.
• Your income is high and your time is short. See advisors for high earners.
• You know you’d sell in a crash. If you’ve done it before, that’s often the costliest mistake of all.
• You’ve stopped enjoying it. A plan you don’t keep up isn’t a plan.

The middle paths

You don’t have to choose all or nothing.

1. Hourly check-ups. Book two or three hours a year with an hourly planner to review your allocation, taxes and beneficiaries.
2. A one-time plan. A one-time plan for a specific decision, then back to DIY.
3. Advice-only planning. An advice-only planner gives ongoing advice on a flat fee and never touches your accounts. See advice-only vs full-service.
4. Automate the investing. A robo-advisor or a single target-date fund handles rebalancing, and you or a planner handle the rest. See target-date fund vs financial advisor.

How to check your own work, or a planner’s

If you’re doing it yourself, once a year write down:

1. Your total cost in dollars. Each fund’s expense ratio times what you hold in it, plus any account fees. On $500,000, every 0.10% is $500.
2. Your actual mix against your target, across all accounts together.
3. Who inherits each account, and whether that’s still right.
4. The next big decision and when you’ll need to make it.

If you hire help for any of this, choose a fee-only planner, paid only by you, so the advice isn’t tied to a product. Look them up on the SEC’s adviser search, and use our questions to ask a financial advisor in the first call. Ask directly: “Will you work with someone who wants to keep investing on their own?” A good DIY-friendly planner says yes without a pitch for managing the money.