It’s reassuring to believe that building wealth can be as simple as buying a low-cost ETF and letting it grow over time. After all, index investing has become one of the most popular strategies for long-term investors. This is due to its simplicity, diversification, and relatively low fees. For many people, this approach works well, especially in the early stages of investing. But as your financial life evolves and becomes more complex, the idea that you can “set it and forget it” may not be practical.
The reality is that investing is only one piece of a much bigger financial picture. Many layers of decision-making go beyond choosing a fund. These can include managing risk and taxes, as well as planning for retirement, major life events, and long-term goals. That’s where a financial advisor can potentially add value, by helping you create a more personalized strategy that adapts as your life evolves. Here are six reasons why relying solely on ETFs might not be as straightforward as it seems.
This post was updated on March 31, 2026.
1. Risk Management
One of the biggest considerations around using a financial advisor is their deep knowledge of risk management. Any good advisor will help build a portfolio specific to your level of risk tolerance. This generally means having some money in cash, some in the market, and maybe some in fixed income like treasury bonds.
The problem with any line of thinking around ETFs is that some can be highly volatile, depending on what they hold. A poorly diversified portfolio could suffer heavily in a recession or sector downturn. Obviously, this is not an ideal scenario, especially if you are close to or nearing retirement. An ETF-only portfolio may not automatically match your risk tolerance unless it’s intentionally designed to do so.
Adding a financial advisor to the mix will help look at your age, income, current net worth, projected net worth, and any financial obligations you might have later in life. Not only will this be instrumental in building out a personalized portfolio, but they may help you manage risk and avoid emotional or poorly timed decisions. Better yet, a financial advisor will also help you ensure you have an emergency fund and some liquidity if any emergency happens.
2. You Should Be Diversified
In the same way you have to think about risk management, you also have to consider being diversified to spread your risk. Even if you choose a broad U.S. equity ETF such as one tracking the S&P 500, you can still have a portfolio heavily weighted toward specific market sectors like telecom, healthcare, or technology, which adds to your overall risk.
If you have multiple ETFs, you might be accidentally increasing your exposure to the stocks, which puts you at more risk. On top of this, many investors who only buy U.S.-focused ETFs may miss out on international diversification.
The bottom line is that working with an advisor will help you consider how to spread out your holdings so you are not exposed to just one aspect of the market. This could mean adding dividend stocks or bonds to the mix or purchasing mutual funds to help offset market volatility.
3. Proper Tax Planning
As your income and investments grow, your tax obligations and expenses increase. One option is to work with a financial advisor, who will immediately help you understand the tax implications associated with different investment vehicles like ETFs, bonds, individual stocks, IRAs, 401(k)s, and more.
Unfortunately, an ETF-only strategy may limit your ability to selectively sell individual holdings for tax purposes, but investors can still use ETFs for tax-loss harvesting in many cases.
Ultimately, a financial advisor will help you consider different ways to integrate your holdings into a broader tax strategy, often in partnership with an accountant. A financial advisor, often alongside a CPA or tax professional, can help you think through long-term tax implications of your investment strategy so you can be prepared not just for this year but maybe the next five or ten years.
4. Always Think Long-Term
At the end of the day, every investment you make, whether it’s in ETFs or broader investment portfolios, should always have you thinking long term. You have to consider your life goals, such as when you want to retire and how much you want to have to live on during retirement.
The challenge is not necessarily ETFs themselves, but whether your overall retirement plan accounts for inflation, healthcare costs, liquidity needs, and withdrawal strategy. Unexpected healthcare costs in retirement can strain any portfolio if you haven’t planned for sufficient income and liquidity. There is also a consideration of how much liquidity you might want to have at any given time.
A good financial planner should help you think through emergency savings and liquidity needs. Everything from car trouble to hospital bills should be considered, and you don’t want to be in a situation where you don’t have enough cash when you need it most.
You may also want to think about trusts, beneficiary designations, and estate planning. A financial advisor can help coordinate legacy planning, often alongside an estate attorney. Some investors prefer regular check-ins, whether quarterly, semiannually, or annually. These check-ins help you see where things stand in the short and long-term so you can make real-time adjustments if necessary.
5. Starting A Family
If you’re starting a family, it’s important to consider what this will do to your financial situation. According to Brookings analysis, the current cost of raising a child for the first 17 years of their life is just over $310,000.
For this reason, you want to start working with a financial advisor and think about how you will pay for all of this beyond just traditional income. Is investing in ETFs the right step to help grow enough money so you can help pay for college, or should you set up a 529 fund instead?
A financial advisor can help you balance retirement and education savings based on your goals and constraints.
6. Inheritance Considerations
While this won’t be applicable for everyone, inheriting money sounds great on paper but in reality it can be overwhelming and completely upend your financial life. As many new doors an inheritance opens, it also means thinking about your financial life in a whole new way, including new avenues of investment and tax considerations.
A financial planner can help you think through how an inheritance fits into your broader financial plan. Any conversation with a financial advisor would likely start with setting up goals for what this money should do, and it will go far beyond just investing in ETFs.
Now that you have this money, depending on how much of a windfall you received, it might also affect your retirement date, something a financial advisor can help with by creating a personalized plan. For some people, the value of financial planning may outweigh the cost. However, advisory fees—often around 1% of assets under management—can be significant and should be evaluated carefully.
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