Quick Verdict
This comparison has a clean, counterintuitive answer: the "free" option (M1) wins for IRA investors, and the "paid" option (Betterment) wins for taxable account investors — because tax-loss harvesting doesn't exist in IRAs. Here's the complete breakdown.
M1 Finance wins if you...
- Primarily invest in a Roth or Traditional IRA
- Want full control over stock/ETF allocations
- Want a portfolio credit line (M1 Borrow)
- Invest <$50K where fee difference is minimal
- Want to build a custom pie with 50+ stocks
- Don't need tax-loss harvesting or CFP access
Betterment wins if you...
- Have $50K+ in a taxable investment account
- Are in the 22%+ federal tax bracket
- Want daily automated tax-loss harvesting
- Want access to a human CFP at $100K+
- Prefer a fully managed hands-off experience
- Want 3 specific SRI/ESG portfolio options
The simple rule: If you're only investing in an IRA — go M1. The 0.25% Betterment fee delivers zero extra value in a tax-advantaged account. If you have a taxable account — go Betterment. Daily TLH in a taxable account at $50K+ will likely recover the fee and generate net additional after-tax wealth.
The insight most comparisons miss
Tax-loss harvesting is worth nothing in an IRA — and worth a lot in a taxable account
Betterment charges 0.25% and its headline feature is daily tax-loss harvesting (TLH). But TLH only generates value in taxable accounts — it works by selling losing positions to realize capital losses that offset gains and ordinary income. In a Roth IRA or Traditional IRA, there are no capital gains taxes to offset. TLH does nothing. So for IRA-only investors, Betterment's fee is pure cost with no offsetting benefit — and M1's $0 wins unambiguously.
Full Comparison Table
| Category | M1 Finance | Betterment |
|---|---|---|
| Management fee | $0 (Plus: $3/mo) | 0.25% Digital / 0.40% Premium |
| Account minimum | $100 taxable / $500 IRA | $0 |
| Portfolio style | Custom pies — full DIY control | Pre-built goal-based portfolios |
| Rebalancing | Automatic via buy orders | Automatic with TLH coordination |
| Tax-loss harvesting | Not offered | Daily TLH on all accounts |
| Human CFP access | None | Yes — Premium tier ($100K min) |
| SRI / ESG options | Expert pies (limited ESG) | 3 distinct SRI portfolios |
| Portfolio credit line | M1 Borrow — up to 40% of acct | Not offered |
| Fractional shares | Yes — on all pies | Yes |
| Individual stock/ETF picking | Yes — any stock in your pie | Pre-built ETF portfolios only |
| Checking / cash management | M1 Spend — FDIC-insured | Cash Reserve (4.5% APY) |
| Crypto exposure | Via crypto expert pies | Yes — crypto portfolio option |
| SIPC insurance | Yes — $500K securities | Yes — $500K securities |
| Mobile app rating | 4.5/5 App Store | 4.8/5 App Store |
| Financial planning tools | Retirement projections | Goal buckets + CFP consultations |
Medal icon = category winner. Data as of April 2026.
Fee Math: When Does Betterment's 0.25% Pay Off?
The fee math is not linear — it depends entirely on whether you have a taxable account (TLH is valuable) or an IRA (TLH is worthless). Below are the numbers for each scenario.
| Scenario | $50K | $100K | $250K | Note |
|---|---|---|---|---|
| M1 Finance Free | $0 | $0 | $0 | No advisory fee at any balance |
| M1 Finance Plus | $36/yr | $36/yr | $36/yr | $3/month flat subscription |
| Betterment Digital | $125/yr | $250/yr | $625/yr | 0.25% AUM per year |
| Betterment TLH savings (taxable) | +$200–450 | +$400–900 | +$1,000–2,250 | Estimated tax-loss harvesting value |
| Betterment net of TLH | +$75–325 | +$150–650 | +$375–1,625 | Savings after fee — taxable accounts only |
IRA investor: M1 wins clearly
In a Roth IRA or Traditional IRA, there are no taxes on gains or dividends. Tax-loss harvesting generates zero value. Betterment's 0.25% is pure cost. M1's $0 advantage is $250/yr on $100K, $625/yr on $250K — compounding over decades.
Taxable account investor: Betterment wins
On a $100K taxable account, Betterment's TLH typically generates $400–900 in annual tax savings (varies by market conditions and tax bracket). Minus the $250 fee, net benefit is $150–650/yr in extra after-tax wealth. M1 can't match this.
Automation & Rebalancing: How They Actually Work
M1 Finance: Pie-Based Automation
Custom pie creation
Build any portfolio with any stocks/ETFs at custom weightings
Buy-only rebalancing
New cash goes to underweight slices — no forced selling
Expert pies
Pre-built model portfolios for lazy portfolio investors
Sell-side rebalancing
Requires manual initiation — not automatic
No TLH coordination
Rebalancing does not consider tax-loss harvesting
Betterment: Managed Portfolio Automation
Automatic full rebalancing
Sells and buys to maintain target allocation on any drift
TLH-coordinated rebalancing
Rebalancing triggered by TLH opportunities when possible
Tax Coordination
Automatically places tax-inefficient assets in IRA, efficient in taxable
No custom stock picking
You can only invest in Betterment's pre-built portfolios
No portfolio credit line
Cannot borrow against your portfolio
Tax Features: The Core Differentiator
| Tax Feature | M1 Finance | Betterment |
|---|---|---|
| Daily tax-loss harvesting | ||
| Tax Coordination (asset location) | ||
| Tax Impact Preview | ||
| Buy-only rebalancing (avoids wash sales) | ||
| Wash sale rule management | Partial | Full automated |
| Tax-smart withdrawals |
Account Types Comparison
M1 Finance
- Individual taxable
- Joint taxable
- Roth IRA
- Traditional IRA
- SEP IRA
- Trust account
- M1 Spend (checking)
- M1 Borrow (portfolio credit)
Betterment
- Individual taxable
- Joint taxable
- Roth IRA
- Traditional IRA
- Inherited IRA
- Cash Reserve (4.5% APY)
- Checking (Betterment Checking)
- 529 — Not offered
Who Should Pick Which?
DIY investor who wants control over allocations
→ Pick M1 FinanceM1's pie system lets you build a fully custom portfolio — any ETF or stock, any weighting — with automatic rebalancing via new deposits. No other robo matches this level of DIY control at $0 advisory fee.
Investor with a taxable account (not just IRA)
→ Pick BettermentBetterment's daily tax-loss harvesting is only valuable in taxable accounts. If you hold a $100K+ taxable account, Betterment's TLH typically generates $400–900+/yr in tax savings — easily covering the 0.25% fee and then some. M1 has no TLH.
Investor primarily using a Roth IRA
→ Pick M1 FinanceIn a tax-advantaged IRA, Betterment's TLH delivers zero additional value (already no taxes). M1's $0 fee wins outright for IRA-only investors — you save 0.25%/year with no offsetting benefit from Betterment.
Investor who wants a portfolio credit line
→ Pick M1 FinanceM1 Borrow lets you borrow up to 40% of your portfolio value at competitive rates — useful for tax-efficient real estate down payments or business capital. Betterment offers no credit line product.
Beginner who wants a fully managed robo experience
→ Pick BettermentBetterment's pre-built portfolios, goal-based planning, and $0 minimum make it the gentler on-ramp. M1's pie system requires investors to make real allocation decisions — which is a feature for some, a friction for others.
Investor who wants human financial advisor access
→ Pick BettermentBetterment Premium includes unlimited CFP consultations at the $100K+ tier. M1 has no human advisor option at any price point.
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Final Verdict
Our Recommendation
IRA-only investors: M1 Finance by a wide margin. If your investing is primarily in a Roth IRA or Traditional IRA, M1's $0 fee beats Betterment's 0.25% with nothing to offset it. The pie system gives you more flexibility and individual stock access. You save $250/yr at $100K and that compounds dramatically over a 30-year Roth IRA horizon.
Taxable account investors: Betterment wins. Daily tax-loss harvesting in a taxable account generates net after-tax savings that exceed the fee for investors in the 22%+ bracket with $50K+. The math doesn't lie — TLH is worth more than it costs.
Both M1 Finance and Betterment are legitimate, SEC-regulated platforms managing billions in assets. The choice is situational, not a quality judgment.
$0 fee · Custom pies · Best for IRA investors
0.25% fee · Daily TLH · Best for taxable accounts
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