Robo Advisor Comparison
A robo-advisor is an automated investment management service. You answer questions about goals, risk tolerance, and timeline; the platform constructs a diversified portfolio of low-cost ETFs and manages it on an ongoing basis with automatic rebalancing, tax-loss harvesting, and other optimizations. The services charge 0.25–0.40% of assets under management — meaningful, but small compared to traditional advisors.
The honest question is whether the value provided exceeds the cost, and for whom. This page is about what robos actually do, the alternatives, and where the automation is worth paying for.
What robos actually do
The standard robo-advisor service includes:
1. **Risk assessment**: questionnaire produces a recommended allocation
2. **Portfolio construction**: low-cost ETFs in a diversified mix, typically 5–10 funds
3. **Automatic rebalancing**: usually threshold-based, sometimes calendar
4. **Tax-loss harvesting** (in taxable accounts): selling positions at a loss to offset gains
5. **Goal tracking**: dashboards for retirement, house, education, etc.
6. **Automatic deposits**: schedules contributions automatically
7. **Some optimization** (varies): direct indexing for higher-net-worth clients, asset location across account types
What robos do *not* do:
- Comprehensive financial planning (insurance, estate, debt, tax beyond loss-harvesting)
- Behavioral coaching (you cannot call them in a panic and get someone to talk you off a ledge — most robos communicate via email/chat only)
- Specialized situations (concentrated equity, business sale, complex estate)
The product is investment management — a narrower scope than a financial planner.
The major players
| Service | AUM fee | Notes |
|---------|---------|-------|
| **Betterment** | 0.25%–0.65% | Standard 0.25%; premium tier with human advisor at 0.65% |
| **Wealthfront** | 0.25% | Direct indexing for accounts >$100K, software-only |
| **Schwab Intelligent Portfolios** | 0% AUM | Fee comes from cash holdings (which are higher than competitors) |
| **Fidelity Go** | 0% under $25K, 0.35% above | Tiered model |
| **Vanguard Digital Advisor** | 0.20% | Vanguard underlying funds, lower cost than independents |
The fee structures vary in important ways. "Free" robos (Schwab Intelligent Portfolios) typically generate revenue through cash allocations earning less than market rates — economically equivalent to a fee but presented differently.
What you are paying for
For 0.25% AUM, what you actually get vs. doing it yourself:
Things that are free elsewhere
- Diversified portfolio of index ETFs (you can build this yourself with the same ETFs at $0)
- Automatic monthly contributions (any brokerage offers this)
- Annual rebalancing (you can do this yourself in 15 minutes)
- Goal tracking dashboards (most brokerages have these)
Things that have real value
- **Threshold-based rebalancing** (more frequent than calendar) — modest value
- **Tax-loss harvesting** — real value in taxable accounts at scale
- **Direct indexing** (Wealthfront and others, for $100K+) — real value for high-tax-bracket investors
- **Behavioral discipline** — automation removes the temptation to mess with your portfolio
The tax-loss harvesting is often the strongest argument. Done well, it can save 0.50–1.50% in taxes annually for taxable account holders in higher brackets — more than offsetting the AUM fee.
When a robo is worth it
You have a taxable account at meaningful size ($100K+)
Tax-loss harvesting at that scale produces real savings. Robos do TLH automatically and systematically; doing it yourself requires monitoring and judgment.
You are in a high tax bracket
Higher brackets amplify the value of TLH. A 35%+ federal bracket plus state tax means each $1,000 of harvested losses is worth $400+.
You will not actually do it yourself
The honest version: many people who say they will rebalance annually do not. If a 0.25% fee buys you actual rebalancing, automatic deposits, and disciplined tax-loss harvesting that you would not otherwise execute, the fee is well-spent.
You want hands-off
The robo handles rebalancing, contribution timing, and TLH. You log in occasionally to check progress. For investors who want minimum involvement, this is a reasonable trade.
When a robo is not worth it
Tax-deferred accounts only
Most of the robo's value comes from tax-loss harvesting in taxable accounts. In a 401(k) or IRA, that benefit does not exist. A target-date fund in your retirement account replicates most of what a robo does at lower cost.
You will actually do it yourself
A diligent investor with a written IPS, automatic monthly contributions, and disciplined annual rebalancing does not need a robo. The marginal value the robo provides is small relative to the fee.
Large portfolio at low fee elsewhere
A 0.25% AUM fee on a $1M portfolio is $2,500/year. That is real money. At larger sizes, even efficient robos become expensive vs. DIY.
Specific portfolio preferences
If you want a specific allocation that the robo does not offer (heavy small-cap value tilt, no international, specific REIT overweight), DIY is required.
The DIY alternative
For an investor who wants robo-like outcomes without paying a robo:
Account setup
- Brokerage account at Vanguard, Fidelity, or Schwab
- Three-fund portfolio: VTI/VXUS/BND (or equivalents) at chosen allocation
- Automatic monthly contributions
Annual maintenance
- One date per year for rebalancing
- Threshold-based check at quarter ends
- Manual tax-loss harvesting in major drawdowns (sell loss, buy similar replacement, hold 31 days, swap back)
The total time investment is 1–2 hours per year. The cost saving vs. a 0.25% AUM robo is meaningful at portfolio sizes above $100K.
The honest variant: many people who plan to do this do not actually do it consistently. If you have a track record of rebalancing diligently, DIY wins. If not, a robo's discipline may be worth the fee.
A reasonable middle path
For investors who want some automation without paying a full robo fee:
Option 1: target-date fund
A single target-date fund handles allocation, rebalancing, and the glide path. No fee beyond the underlying expense ratio (0.05–0.15%). Loses tax-loss harvesting but otherwise does what a robo does.
For tax-advantaged accounts, this is often the cleanest answer.
Option 2: target-date in tax-deferred + DIY in taxable
Use a target-date fund for your 401(k) and IRA; manage the taxable account yourself with broad-market ETFs. Capture the tax-loss harvesting in taxable manually a few times per year.
Option 3: robo for taxable, target-date in tax-deferred
For the highest-leverage automation: robo handles taxable (where TLH provides value); target-date fund handles tax-deferred (where TLH does not).
Common failure patterns
- **Using a robo in tax-deferred accounts only.** The TLH value is wasted; you are paying for what target-date funds provide free.
- **Comparing robo performance to S&P 500.** Robos hold diversified portfolios that include international and bonds; comparing to a single index is meaningless.
- **Switching robos to chase fees.** Transferring assets has tax consequences in taxable accounts.
- **Treating the robo's questionnaire as authoritative.** Risk-tolerance questionnaires are crude; the right allocation depends on your specific situation.
- **Forgetting that robos charge a fee.** Marketing emphasizes "free" or "low cost" — but 0.25% on $500K is $1,250/year.
Further Reading
- [LowCostIndexFundInvesting](LowCostIndexFundInvesting) — The investment philosophy
- [IndexFundPortfolioConstruction](IndexFundPortfolioConstruction) — DIY equivalent
- [TaxLossHarvesting](TaxLossHarvesting) — The mechanism robos automate
- [TargetDateFunds](TargetDateFunds) — Simpler alternative for tax-deferred accounts
- [LowCostIndexFundInvesting Hub](LowCostIndexFundInvestingHub) — Cluster index