Robo-advisors have made professionally managed, diversified investing accessible with far lower account minimums and fees than traditional advisory relationships once required. But "robo-advisor" is not one uniform product — platforms differ meaningfully in fees, automated features, and account support. This guide lays out the framework we use to evaluate any robo-advisor.
Start With Regulation, Not Marketing
Most robo-advisors operating in the U.S. are registered investment advisers, regulated by the SEC or by state securities regulators depending on the size of assets they manage. Registered advisers must file a Form ADV, a public disclosure document covering fees, investment strategy, and conflicts of interest. Before evaluating features, it is worth confirming a platform's registration status and reading its Form ADV — both are searchable through SEC resources such as Investor.gov.
Compare Fee Structures Directly
Robo-advisor fees generally fall into a few models: a percentage of assets under management (AUM) charged annually, a flat annual or monthly fee, or a subscription unrelated to account size. See our breakdown of robo-advisor fee structures for how each model compounds differently as your balance grows — a percentage fee that looks small at a low balance can become a meaningfully larger dollar cost over decades.
| Fee model | How it scales | Best fits |
|---|---|---|
| Percentage of AUM | Grows in dollar terms as your balance grows | Investors who want cost tied to account size |
| Flat annual/monthly fee | Stays fixed regardless of balance | Larger balances, where a flat fee is proportionally cheaper |
| Subscription | Fixed periodic charge, often tiered by features | Investors who value a predictable, feature-based cost |
Understand the Automated Features You're Paying For
Two features are common selling points, worth evaluating on their own merits rather than assuming all platforms implement them the same way:
- Tax-loss harvesting — automatically selling losing positions to offset taxable gains, explained in how robo-advisors automate tax-loss harvesting.
- Automatic rebalancing — keeping your portfolio aligned with its target allocation as markets move, explained in how automatic portfolio rebalancing works.
Match Account Types to Your Goal
Before opening an account, confirm the platform actually supports the account type your goal requires — a taxable account for general investing, a traditional IRA or Roth IRA for retirement, or other structures like SEP IRAs and trusts. Our guide to account minimums and account types covers what is commonly available and what minimum balance is typically required to start.
Decide Whether You Need Human Access
Robo-advisors are generally well suited to straightforward, long-term, diversified investing. If your situation involves more complexity — business ownership, estate planning, concentrated positions, or a major life transition — a purely automated platform may not be sufficient on its own. See our comparison of robo-advisors vs. human financial advisors, including hybrid models that combine both.
How We Evaluate Platforms
Rather than ranking specific robo-advisors — which requires ongoing verification of fees and features that change over time — we focus on the criteria that remain useful regardless of which platform you're considering: transparent fee disclosure, confirmed regulatory registration, clearly explained automated features, account type compatibility, and honest limits on what automation can and cannot replace.
Common Mistakes to Avoid
- Comparing only the headline fee percentage without checking flat-fee or subscription alternatives.
- Assuming every platform offers tax-loss harvesting or rebalancing at the same frequency or quality.
- Opening an account type the platform does not actually support well for your goal.
- Treating "robo-advisor" as a guarantee of better returns rather than a delivery method for portfolio management.
Conclusion
Evaluating a robo-advisor means looking past the marketing to the mechanics: confirm regulatory registration, compare the true cost of the fee structure over time, understand exactly what the automated features do, and match account support to your actual goal. Use the companion guides below to go deeper on each factor.