How Do Robo-Advisors Make Money If They Charge Low Fees?

The Core Model: Small Fees at Large Scale

The primary way most robo-advisors make money is straightforward: they charge an annual advisory fee calculated as a percentage of the total assets they manage on your behalf. This is the same basic fee structure traditional human financial advisors often use, just typically at a lower percentage rate, since automation reduces the amount of direct human labor required to manage each individual account. This is the key to how the low-fee model works economically: because much of the portfolio management process, including rebalancing and initial allocation, is automated, a robo-advisor can serve a very large number of customer accounts without needing to proportionally scale up human staff, letting it remain profitable even while charging each individual customer a relatively small fee.

Additional Revenue Streams Beyond the Core Fee

Beyond the base management fee, many robo-advisor providers have built additional, often disclosed, revenue streams into their business models. One common source is interest earned on uninvested cash balances sitting in customer accounts; when part of your account balance isn’t actively invested, that cash may earn interest, and some providers keep a portion of that interest as revenue while passing along a portion to customers through a cash management or savings feature. Some platforms also offer premium subscription tiers with additional features, like access to human financial advisors or more advanced planning tools, for a higher fee than their basic automated tier.

A smaller number of platforms, particularly some that offer broader no-fee or low-fee trading and investing services alongside robo-advisor features, generate part of their revenue through payment for order flow, where a brokerage receives compensation from market makers in exchange for routing customer trade orders to them for execution. This is a legal and disclosed practice subject to SEC oversight regarding a broker’s obligation to seek the best execution for customer trades, though it has drawn scrutiny and debate regarding potential conflicts of interest.

Why This Matters for Choosing a Platform

Understanding how a robo-advisor actually makes money is useful context when comparing platforms, since a provider’s full revenue model, not just its headline management fee, can affect the overall value you’re getting. Two platforms with similar low advertised management fees might differ meaningfully in areas like how much interest they pass along on cash balances or whether they participate in payment for order flow, and reviewing a specific provider’s fee and revenue disclosures directly is the most reliable way to understand the full picture for any given platform.

Bottom Line

Robo-advisors primarily make money through a percentage-based management fee applied across a large, automated customer base, which keeps individual fees low while remaining profitable at scale, and many supplement this with additional disclosed revenue sources like cash balance interest, premium subscription tiers, and, for some platforms, payment for order flow.

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