Flat Fee vs. Assets Under Management (AUM) Financial Advisor: Which Should You Choose?
- Aug 10
- 7 min read
Many physicians in our online physician communities use a financial advisor to help them develop a financial plan and manage their finances. A question that often comes up is how much compensation is appropriate for these services, and which fee structure feels fair. The fact is that most physicians accumulate substantial wealth over the course of their careers, and therefore fees can add up significantly in some models. Additionally, the model your advisor uses to charge you can have a significant impact on both your overall net worth and the advice you receive, especially over the long run. It’s important to understand this when choosing a financial advisor. Below, we’ll cover how each model works, the pros and cons of each, how to calculate the costs, and how to choose what model is best for your personal situation.
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What is the difference between flat fee and assets under management (AUM) fee structures used by financial advisors?
These days, there are lots of different models that financial advisors may use to structure fees for their clients. Usually though, broadly speaking, they fall into two categories - or a hybrid of these two categories: flat fee vs AUM.
Flat fee advisors charge a fixed amount for their services that is set upfront, whereas assets under management advisors charge you a percentage of your assets - meaning that as your portfolio grows, their fees will also grow. We’ll cover this in more depth below, but the right choice between a flat-fee or AUM (assets under management) financial advisor depends on your portfolio size and what you need from an advisor, and may vary throughout your career.
How do flat-fee financial advisors work?
A flat-fee advisor charges a set amount for their services regardless of how much you have invested. We typically see this fee structured as a one-time project fee, an annual retainer, or an hourly rate. Typical pricing may look like this:
One-time financial plan: $1,500-$5,000+
Annual retainer: $2,000-$10,000+
Hourly rate: $200-$500/hour
Some financial planners may have different ways of calculating these set fees, such that somebody that is at the beginning of their career with low complexity in their finances may receive a lower flat fee than somebody with more complicated financial planning needs, so it’s not necessarily true that the attending physician at the end of his career will pay the same amount as the resident physician at the beginning of her career.
Because flat-fee advisors aren't compensated based on the assets they manage, their advice tends to be more independent. They generally have less financial incentive to push you toward rolling over retirement accounts, keeping excess cash invested, or avoiding decisions like paying down debt or purchasing real estate outside their management.
Note that there is a tradeoff: you may be responsible for implementing recommendations yourself. Some flat-fee advisors offer limited ongoing support and meet with clients only once or twice per year.
If you're interested in working with a financial advisor, check out the PSG financial advisors database. We have partnered with financial advisors who work with physicians and understand the unique financial considerations that come with a career in medicine. Visit our database of financial advisors for physicians to learn more about their services, fee structures, and areas of expertise, and find an advisor who may be a good fit for your financial goals.
How do AUM (assets under management) financial advisors work?
An AUM (assets under management) advisor charges a percentage of the assets they manage on your behalf, typically between 0.5% and 1.0% annually. Here's what that may look like in dollar terms:
Portfolio Value | 1% AUM Fee |
$250,000 | $2,500/year |
$500,000 | $5,000/year |
$1,000,000 | $10,000/year |
$3,000,000 | $30,000/year |
As you can see, fees go up significantly as your portfolio value increases. However, many firms recognize that the complexity of managing these funds may not go up proportionately, so they may reduce their percentage as assets grow. Regardless of them doing this, the total dollar amount will usually still rise considerably over time, and it’s important to keep track of what you are being charged annually as your net worth grows.
A full-service AUM firm typically handles investment management, portfolio rebalancing, tax-loss harvesting, retirement planning, insurance review, estate coordination, and ongoing access to an advisor. The value proposition that these firms will put forth is that they function like an outsourced CFO for your household finances—similar to how you might bring in a specialist consultant rather than managing everything yourself.
How do the costs of the flat fee vs AUM financial advisor models actually compare at different portfolio sizes?
To help visualize this, let's look at a practical example. Let’s assume the following:
Flat-fee advisor: $4,000/year
AUM advisor: 0.80%
The break-even point (where both cost the same) is around $500,000 ($4,000 ÷ 0.008).
Below that threshold, the AUM fee may actually cost less in absolute dollars. Above it, the flat fee becomes progressively cheaper, and the gap widens significantly as wealth grows. For instance, a $2 million portfolio with a 1% AUM fee costs $20,000 per year. A flat-fee arrangement for the same client might run $4,000-$6,000—a difference that compounds meaningfully when invested over decades.
What are the advantages and disadvantages of each model?
Generally speaking, the flat fee model will keep a capped price and is predictable, and is usually cheaper for larger portfolios. The downside is that since the financial advisor makes the same regardless of how much you make, they may not be incentivized to spend more time on your account. Similarly, they may only include a certain number of meetings (which you may be okay with if you don’t have time for meetings anyways, but can get frustrating if you’re charged extra if you need to talk something through).
On the other hand, the AUM model will get more expensive as your portfolio grows, but your advisor is incentivized to focus on growing your portfolio and manage it very actively (that said, if you’re comfortable with basic index fund type investing, you may not need somebody to actively manage your portfolio). At lower portfolio values, it can be significantly cheaper than the flat fee model, and many physicians at early stages of their careers may find that it’s much cheaper than some flat fee advisors. It’s just very important to track your costs as they go up and reassess regularly if you're getting additional value from the additional fees.
When does a flat-fee model make more sense?
While nothing is absolute because you may prioritize different things with your financial planning, many of our members find that a flat-fee financial advisor tends to be a stronger fit if:
Portfolio size: Your portfolio is above roughly $1 million.
Investment comfort: You're comfortable managing your own investments in low-cost index funds.
Planning needs: Your primary needs focus on taxes, retirement timing, stock options, estate planning, insurance, or charitable giving.
Objectivity: You want advice that isn't influenced by where your assets sit.
Predictability: You prefer transparent, set costs.
When does an AUM model make more sense?
Many of our members who prefer an AUM advisor tend to feel it makes sense if you want:
Hands-off approach: You don't want to manage your own investments.
Access: You value frequent, ongoing access to an advisor.
Complexity: Your financial life is complex and actively changing.
Behavioral discipline: You know you're prone to emotional decisions during market volatility.
Delegation: You want someone to handle the ongoing details like rebalancing and tax-loss harvesting.
For physicians earlier in a wealth-building journey, or who want a fully managed financial relationship, a well-chosen AUM advisor can be worth the cost.
What questions should you ask any financial advisor before hiring them?
Regardless of fee model, these questions will help you evaluate whether an advisor is the right fit:
Are you a fiduciary at all times, not just sometimes?
What services are included beyond investment management?
How often will we meet, and who prepares my financial plan?
How do you help with tax strategy?
Do you receive any commissions or referral fees for products you sell or investments you recommend?
What happens if I move some assets elsewhere?
What is my all-in annual cost?
The fiduciary question matters more than you might realize. An advisor who is only sometimes held to a fiduciary standard (for example, when acting as a broker) can legally recommend products that benefit them rather than you.
Read this dedicated article on red flags when picking a financial advisor for more context.
If you're interested in working with a financial advisor, check out the PSG financial advisors database to explore advisors who work with physicians, including their services, fee structures, and areas of expertise.
Conclusion
Neither fee model is universally better because the numbers change depending on your income, as does the complexity of your financial situation and your desired goals/needs. The more useful question is: what are you actually paying for, and is the value there?
As your portfolio gets larger, just know that AUM fees will add up significantly over time, even if the advisor is not necessarily doing more work (or at least proportionately to the growth in fees). It's important to keep track of the fees you're paying and regularly assess whether the fees make sense anymore.
Ultimately, the advisor's competence, fiduciary commitment, and the services they provide matter a lot, and have to be weighed alongside the fee structure. Paying slightly more for excellent advice is almost always better than paying less for advice that doesn't actually improve your financial outcomes, but paying too much for services you could get for cheaper will erode away at your net worth over the years. It's all a balance.
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