By Jozsef Huszar • Updated: October 6, 2026

How Robo-Advisors Work

A robo-advisor is a digital platform that builds and manages an investment portfolio for you using algorithms, usually from a short questionnaire. It promises low cost, simplicity, and discipline. What many people do not realize is that a robo-advisor is a regulated investment adviser, which means it owes you legal duties that a typical brokerage app does not. It also means you can check its registration, read its conflicts of interest, and hold it to account.

This guide covers the theory: what robo-advisors are, what the law requires of them, how they are paid, how they are taxed, and where their limits lie. It builds on Stocks & ETFs and Best Online Brokers. For regulators and general investor protections, see the Invest overview.

Most robo-advisors follow the same basic process:

1. Onboarding. You answer questions free-stock-screener-and-financial-insights your goals, time horizon, income, and risk tolerance.
2. Portfolio construction. The platform assigns you a diversified portfolio, typically made of low-cost ETFs across stocks, bonds, and sometimes other assets.
3. Automation. It handles purchases, rebalancing (restoring your target mix as markets move), and dividend reinvestment.
4. Optional features. Examples include tax-loss harvesting, goal tracking, retirement account support (IRA, Roth IRA, rollover IRA), and cash management.

Common Robo-Advisor Models

Model	How it works	Typical fit
Pure robo	Fully automated, minimal human contact	Beginners, small accounts, hands-off investors
Hybrid robo	Automation plus access to human advisers (often at a higher fee tier)	People who want guidance on bigger decisions
Direct indexing / personalized indexing	Holds individual stocks that replicate an index, allowing customization and tax-loss harvesting at the stock level	Larger taxable accounts. Often higher minimums and fees.
Employer-plan managed accounts	Automated allocation inside a 401(k)	Workplace plan participants. Governed by ERISA, with fees set by the plan.

Robo-Advisors vs. Other Options

	Robo-advisor	Do-it-yourself with index funds	Target-date fund	Human adviser
Typical cost	Low advisory fee plus fund costs	Fund costs only	Fund expense ratio	Often a higher percentage of assets, or hourly or flat fees
Rebalancing	Automatic	You do it	Built in	Varies
Personalization	Limited	Full control	One-size-fits-age	Highest
Tax features	Often tax-loss harvesting	You manage	Limited	Varies
Legal standard	Fiduciary	None (you are the decision-maker)	Fund-level rules	Fiduciary (if a registered adviser)

The Legal Framework for Robo-Advisors

Robo-Advisors Are Registered Investment Advisers

Under the Investment Advisers Act of 1940, firms that give investment advice for pay generally must register with the SEC or with their state securities regulator. Larger advisers (generally those managing $100 million or more) register with the SEC, and smaller ones with the state. Robo-advisors are no exception, and the SEC has published guidance specifically for automated advisers, covering clear disclosure free-stock-screener-and-financial-insights how the algorithm works and its limits, how questionnaires are used to assess clients, and compliance programs designed for digital delivery.

The Fiduciary Duty

Under the SEC’s 2019 interpretation of the adviser standard of conduct, an adviser owes its clients a fiduciary duty with two parts:

• Duty of care: providing advice in the client’s best interest, based on a reasonable understanding of the client’s objectives, seeking best execution of trades, and monitoring the account over the relationship, as agreed.
• Duty of loyalty: not putting the adviser’s interests ahead of the client’s, and making full and fair disclosure of conflicts of interest so the client can give informed consent.

A fiduciary duty does not guarantee performance and does not mean the adviser will avoid all conflicts. It means conflicts must be disclosed and managed. Robo-advisors usually serve clients under a limited scope (for example, managing a defined portfolio through an app), and that scope must be disclosed. Note how this differs from brokers, which follow Regulation Best Interest when making recommendations (see Best Online Brokers).

Key Disclosure and Conduct Requirements

Requirement	What it means for you
Form ADV Part 2A (brochure)	A plain-English description of the firm’s services, fees, conflicts, methodology, and disciplinary history. Read it before opening an account.
Form CRS (relationship summary)	A short summary of services, fees, conflicts, and legal standards, which retail clients must receive.
Custody Rule	Client assets must generally be held by a qualified custodian, typically a broker-dealer or bank, separate from the adviser’s own assets. Often the custodian is a partner or affiliated broker-dealer, so SIPC protection depends on that custodian.
Marketing Rule	Limits on advertising: performance claims must be fair and balanced, hypothetical performance is restricted, and paid testimonials and endorsements require clear disclosure of the compensation.
Compliance programs	Advisers must maintain written compliance policies and designate a chief compliance officer.
Privacy and cybersecurity	Regulation S-P (as amended in 2024, with phased compliance dates) requires safeguards, incident response, and notification of data breaches affecting customers.
Anti-money-laundering and identity verification	Expect identity checks when you open an account.

SEC Enforcement Examples

The SEC has brought actions involving automated advisers. These illustrate the risks and show the rules are real, but you should verify details on sec.gov:

• In 2018, the SEC charged an automated adviser for false statements free-stock-screener-and-financial-insights its tax-loss harvesting monitoring for wash sales.
• In 2022, the SEC announced a settlement of free-stock-screener-and-financial-insights $187 million with an automated adviser and its affiliates over undisclosed conflicts of interest related to large cash allocations that benefited an affiliated bank.
• In 2024, the SEC charged two investment advisers for false and misleading claims free-stock-screener-and-financial-insights their use of artificial intelligence (“AI washing”).

The common theme is disclosure: what the platform says it does must match what it actually does.

What Protects You, and What Does Not

• SIPC protects against the loss of assets if the custodian broker-dealer fails (up to $500,000, including $250,000 in cash). It does not protect against investment losses, poor advice, or fraud by an adviser. Check the custodian’s SIPC membership.
• FDIC insurance may apply to cash held in a bank sweep or deposit program, up to applicable limits at each program bank. It does not cover investments.
• No guarantee of returns. A robo-advisor can lose money in a market decline.
• Your recourse. Complain to the firm, the SEC (sec.gov/tcr), and your state securities regulator. Advisory agreements often include arbitration clauses, so read them.

Robo-Advisor Fees: How Robo-Advisors Make Money

Source	What to know
Advisory fee	Usually a percentage of assets under management (AUM) per year, often at the lower end of the industry range for basic automated service, with higher tiers for human access. Some charge a flat monthly fee.
Underlying fund fees	The ETFs inside the portfolio charge their own expense ratios, on top of the advisory fee.
Cash allocation	Many platforms hold part of the portfolio in cash and may earn revenue on it. This is a conflict of interest that must be disclosed. Compare the cash allocation and what you earn on it.
Proprietary funds	If the firm uses its own or affiliated funds, that is a conflict. Check Form ADV.
Revenue sharing and affiliated products	Disclosed in Form ADV and Form CRS.
Other fees	Account closure or transfer fees, premium-tier fees, and fees for added services.
“Free” services	A zero advisory fee usually means the firm earns money in other ways, such as cash allocations or products. Find out how.

The cost of automation, illustrated (hypothetical, not a forecast): $50,000 invested for 20 years at a 6% annual return before costs.

Approach	Total annual cost	Approximate ending value
Self-directed with a low-cost index fund (0.08% expense ratio)	0.08%	free-stock-screener-and-financial-insights $158,000
Robo-advisor (0.25% advisory fee plus 0.08% fund costs)	0.33%	free-stock-screener-and-financial-insights $151,000

The difference of roughly $7,000 is the price of convenience, rebalancing, and any tax features, so ask whether you will actually use what you are paying for.

The Risk Questionnaire: What It Can and Cannot Do

Robo-advisors use your answers to assign a risk profile. Understand the limits:

• Risk tolerance vs. risk capacity. Tolerance is how you feel free-stock-screener-and-financial-insights losses. Capacity is how much loss you can actually afford. A questionnaire may capture one better than the other.
• Short questionnaires miss context such as other assets, a spouse’s income, debts, upcoming expenses, taxes, and your job security.
• Your answers drive the outcome. Wrong or hurried answers lead to a portfolio that may not fit.
• Review your profile regularly. Update it when your life changes (job, marriage, children, retirement).
• Check what the algorithm does not do: many robos do not provide comprehensive financial planning, estate planning, or insurance and debt advice.

Taxes and Tax-Loss Harvesting

Topic	General rule
Advisory fees	Generally not deductible for individual taxpayers.
Rebalancing in a taxable account	Selling holdings to rebalance can realize capital gains. Ask how the platform minimizes this, for example by using new contributions and dividends first.
Tax-loss harvesting	Selling investments at a loss to offset gains (and up to $3,000 of ordinary income per year), then reinvesting in similar holdings. It typically defers tax rather than eliminating it, because the new holdings have a lower cost basis. Its value depends on your tax rate, the market, and how long you hold.
Wash sale rule	A loss is disallowed if you buy a substantially identical security within 30 days before or after the sale. The platform may monitor within the account it manages, but it generally cannot see your other accounts, including those of your spouse and your IRAs. Buying the same fund elsewhere can undo harvested losses, so coordinate.
Direct indexing	Can generate many small tax lots and larger harvested losses, but with higher complexity and fees.
Dividends and fund distributions	Taxable in the year received (in a taxable account), even if reinvested. See our Dividend Stocks guide.
Retirement accounts	Inside a traditional or Roth IRA, trades and dividends are not taxed annually, and tax-loss harvesting does not apply. 2026 IRA limit: $7,500 ($8,600 with the age-50 catch-up).
Long-term vs. short-term gains	Long-term gains (held over one year) are taxed at 0%, 15%, or 20%, and short-term gains as ordinary income. See our Stocks & ETFs guide.
Estimated taxes and forms	You will typically receive Form 1099-B, 1099-DIV, and 1099-INT from the custodian. Large gains may require quarterly estimated payments.
Account transfers	An in-kind transfer to another custodian is generally not a taxable sale, but liquidating holdings is. Ask how the platform handles transfers, since some positions (such as fractional shares or proprietary funds) may have to be sold.

See IRS Publications 550 and 590-A/590-B, Form 8949, or consult a licensed tax professional.

Risks and Red Flags

Real risks:

• Market risk. Automation does not prevent losses.
• Over-reliance on a questionnaire and an algorithm that may not reflect your full situation.
• Hidden costs. Cash drag from a large cash allocation, and layered fees.
• Tax-loss harvesting hype. Claims free-stock-screener-and-financial-insights savings can be overstated. Understand the basis effect and the wash sale limits.
• Limited human help when markets are stressed or your situation is complex.
• Platform and cybersecurity risk, including outages and account takeovers.
• Concentration in the provider’s own products.
• Behavior. Even an automated plan can be undermined if you panic-sell in a downturn.

Fraud warning signs:

• Promises of guaranteed returns or “AI-powered” strategies that beat the market
• Fake “robo” or “AI trading” apps, often found through social media or messaging apps
• Pressure to transfer money quickly, or to a personal account or crypto wallet
• Firms that do not appear in the SEC’s Investment Adviser Public Disclosure database or your state’s records

Report suspected fraud to the SEC (sec.gov/tcr), your state securities regulator, and the FTC (ReportFraud.ftc.gov).

How to Evaluate a Robo-Advisor

Question	Where to look
Is it a registered investment adviser, and what is its record?	SEC’s Investment Adviser Public Disclosure (adviserinfo.sec.gov), plus your state regulator
What are all the fees?	Form ADV Part 2A, Form CRS, and the fee schedule. Add advisory fee plus fund expense ratios.
Who is the custodian and is it SIPC-protected?	Account agreement, custodian disclosures, sipc.org
What are the conflicts?	Form ADV and Form CRS. Look for proprietary funds, cash allocation, and affiliated products.
How is cash handled?	The default cash allocation, interest, and FDIC coverage
How does the portfolio work?	The investment methodology, fund choices, rebalancing rules, and risk-level definitions
How does tax-loss harvesting work?	Eligibility, which accounts, minimums, wash sale limits, and what it does not do
What account types are offered?	Taxable, IRA, Roth IRA, rollover, joint, custodial, trust
What are the minimums and tiers?	Account minimums and what each tier includes
What human access is included?	Phone, chat, and planning support
How easy is it to leave?	Transfer out fees and in-kind transfer options
How does the firm handle disputes?	Arbitration clauses and complaint procedures

A note on “best robo-advisor” rankings. Rankings often reflect different criteria, and many sites earn referral fees. Under the SEC’s Marketing Rule and FTC rules, paid endorsements must carry clear disclosure. Use rankings as a starting list, and verify each firm yourself.

Legitimate Ways to Get the Most Out of a Robo-Advisor

1. Be honest and thorough in the questionnaire, and update it after major life changes.
2. Compare the total cost, including advisory and fund fees and cash allocation, against alternatives such as a target-date fund or a few index funds.
3. Read Form ADV and Form CRS before you fund the account.
4. Use tax-advantaged accounts for long-term goals, and capture any employer 401(k) match.
5. Put money to work through contributions. Automatic deposits and rebalancing with new money can reduce taxable sales.
6. Coordinate tax-loss harvesting. Do not buy the same fund in another taxable account or an IRA within 30 days, and tell your spouse not to either.
7. Match tax features to your situation. Harvesting is most useful in higher tax brackets and larger taxable accounts, and irrelevant in IRAs.
8. Review annually: fees, performance versus your benchmark, risk level, and whether the platform still fits.
9. Secure the account: authenticator app, unique password, and alerts.
10. Keep records: statements, confirmations, 1099 forms, and fee notices.
11. Stay the course. The main benefit of an automated plan is discipline, and selling after a decline typically locks in losses.
12. Know when to graduate. If your finances become complex (business income, equity compensation, estate issues), consider a human fiduciary adviser, ideally one paid by flat or hourly fees, or a fee-only planner.

If Something Goes Wrong

• Contact the firm in writing, and keep copies.
• Complain to the SEC (sec.gov/tcr) or your state securities regulator.
• Check the arbitration clause in your agreement and any time limits.
• If the custodian fails, SIPC (sipc.org) explains the claims process.
• Report fraud to the FTC (ReportFraud.ftc.gov) and, for internet crime, the FBI’s IC3 (ic3.gov).
• Consider a securities attorney for significant losses.

What Could Change

1. Rules on artificial intelligence and automated advice. Regulators have focused on accuracy of AI-related claims and on conflicts built into algorithms. Watch for new SEC guidance and examination priorities.
2. Retirement advice standards. The Department of Labor’s 2024 rule on fiduciary advice for retirement accounts has been subject to litigation and policy change, so check its current status.
3. Cash sweep and cash allocation practices, which have drawn scrutiny and litigation.
4. Direct indexing growth and the tax questions it raises.
5. Cybersecurity and privacy rules, including phased compliance with amended Regulation S-P.
6. Tax law, including rate thresholds and the rules for new children’s accounts.
7. ETF innovation, including ETF share classes, which may change what robo portfolios hold.

Where to Go Next

Continue to Crypto & Digital Assets, the final article in the Invest section. It is the fastest-changing area, and it builds on the securities-law concepts you have now covered.

Official Sources

• SEC: sec.gov | Investor.gov | Investment Adviser Public Disclosure: adviserinfo.sec.gov
• FINRA: finra.org | BrokerCheck: brokercheck.finra.org
• SIPC: sipc.org | FDIC: fdic.gov
• North American Securities Administrators Association: nasaa.org
• Internal Revenue Service: irs.gov (Publications 550, 590-A, 590-B; Form 8949)
• FTC: ReportFraud.ftc.gov | FBI IC3: ic3.gov
• Statutes and regulations: 15 U.S.C. § 80b-1 et seq. (Investment Advisers Act of 1940); 17 CFR § 275.206(4)-2 (Custody Rule); 17 CFR § 275.206(4)-1 (Marketing Rule); 17 CFR § 275.206(4)-7 (Compliance Rule); SEC Release IA-5248 (2019 interpretation of the adviser standard of conduct); 26 U.S.C. § 1091 (wash sales)

Editorial transparency. Websites that earn commissions or referral fees from advisers or brokers must clearly disclose those relationships. Nothing in this article is a recommendation of any robo-advisor, account, or security.