American Express vs. Betterment
Comparing American Express and Betterment for high-yield savings: American Express's High Yield Savings Account pays 3.20% APY while Betterment's Cash Reserve pays 3.90% APY.
See how they compare on rate stability, mobile app ratings, and more below.
The Bottom Line
Who pays more interest on $10,000? Betterment pays $70 more than American Express annually ($390 vs $320).
Choose American Express if you want Zelle for quick transfers. Choose Betterment if getting the best rate matters most, or BBB rating matters to you.
| Metric | American ExpressHigh Yield Savings Account Mar 24, 2026 | BettermentCash Reserve Mar 24, 2026 |
|---|---|---|
| APY | 3.20% | 3.25% - 3.90% |
Est. Earnings | $5,000+$160 $10,000+$320 $25,000+$800 | $5,000+$195 $10,000+$390 $25,000+$975 |
Min Deposit | $0 | $10 |
Snapshot view. Rates subject to change. | ||
Terms | - | Promo rate for new customers. 3.25% APY applies to existing customers. |
| Features | FDIC InsuredNo MinimumsGreat iOS AppGreat Android AppZelle® SupportedDaily CompoundingRate Changes Often | FDIC InsuredLow MinimumsGreat iOS AppGreat Android AppRate Changes Often |
Market Reality Check
Both of these banks offer rates below the current top tier. The best rates we track are currently above 4.15% APY.
Comparison Analysis
Comparing American Express vs. Betterment
Executive Summary
Betterment's Cash Reserve offers a higher APY of 3.90% for new customers, compared to American Express's High Yield Savings Account, which provides a 3.20% APY. Both accounts have no maintenance fees and no direct deposit requirements, making them accessible options. However, the Betterment account is restricted to new customers for the advertised rate, while American Express is open to all. Both products are online-only, with American Express requiring no minimum deposit, while Betterment has a minimum deposit of $10.
The analysis is based on current Banksparency database records
* This content is provided for informational purposes only; always verify details with the provider.
Why American Express?
- ✓No checking account or direct deposit required
- ✓Fast transfers via Zelle®
- ✓Available to New & Existing Customers
Why Betterment?
- ✓Higher potential APY (3.90% vs 3.20%) on all balances
— Key Feature Differences —
Better Returns at $10,000
BettermentBetterment's Cash Reserve earns more on smaller deposits (approx. $390 vs $320/yr).
Better Returns at $25,000
BettermentBetterment's Cash Reserve pulls ahead with larger amounts (approx. $975 vs $800/yr).
Best for Simplicity
American ExpressAmerican Express's High Yield Savings Account offers 3.20% APY with no bundling, direct deposit requirement or caps.
Best Mobile App Experience
American ExpressAmerican Express offers an iOS app rated 4.9 (vs. 4.8) and Android app rated 4.9 (vs. 4.7)
Shared Benefits
Over a 1-year period, Betterment's Cash Reserve pays $70 more interest on a $10,000 balance than American Express's High Yield Savings Account.
*This calculation assumes current rates remain consistent for 1 year and does not include temporary bonuses.
Non-sponsored link to official site
Non-sponsored link to official site
Top Market Contenders
American Express vs. Betterment Savings Calculator
You earn $70 more with Betterment than American Express on a $10,000 initial deposit for 1 year*.
*This calculation assumes that APYs remain unchanged for 1 year, and takes into account known promo rate periods, but does not factor in bonuses. You can see how often these banks have changed their rates in the Compare Savings Rates Over Time section below.
American Express
High Yield Savings Account
Savings Breakdown
- Interest Earned+$320.00(3.1%)
- Total Contributions$0
- Initial Deposit$10,000
Projected Balance
$10,320.00
Betterment
Cash Reserve
Savings Breakdown
- Interest Earned+$390.00(3.8%)
- Total Contributions$0
- Initial Deposit$10,000
Projected Balance
$10,390.00
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
Still banking with Chase, Bank of America, or Wells Fargo?
On a $10,000 balance, you're missing out on at least $319 per year in interest.
Both American Express and Betterment dramatically outperform the typical 0.01% APY at traditional big banks.
| Feature | American Express | Betterment |
|---|---|---|
| APY | 3.20% Verified: 3/24/2026 ↘︎ 0.20%90d Change | 3.90% Range: 3.25% - 3.90% Verified: 3/24/2026 ↗︎ 0.65%90d Change |
| Product Name | High Yield Savings Account | Cash Reserve |
| Minimum Deposit | $0 | $10 |
| Min. Balance for APY | $0 | $0 |
| Monthly Fee | $0 | $0 |
| Compound Frequency | Daily | N/A |
| Branch Access | None | None |
| Account Type | Online Only | Online Only |
| Physical Branches | None | None |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | ||
| FDIC Insured | YesVerify FDIC | Yes |
| Zelle® Support | Available Requires Amex Rewards Checking; not available for standalone HYSA. | Not Supported |
| BBB Rating | F | A- |
| Important Notes | - | Promo rate for new customers. 3.25% APY applies to existing customers. |
| Next Steps | Visit SiteVerify at American Express Non-sponsored link to official site | Visit SiteVerify at Betterment Non-sponsored link to official site |
📈 Compare Savings Rates Over Time
Historical Performance
| Metric | American Express | Betterment |
|---|---|---|
| High Yield Savings Account | Cash Reserve | |
Current APY | 3.20% | 3.90% |
Trend | Stable | Stable |
Velocity (bps/mo) | -3.7 | -5.8 |
Days Since Change | 6 | 32 |
12-Month High | 3.70% | 4.00% |
12-Month Low | 3.20% | 3.25% |
Adjustments / Mo | 0.41 | 0.33 |
Volatility Score | 0.039 | 0.083 |
How to read these metrics(Click to expand)
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High Rates (With Checking Bundle)
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More Comparisons
Compare American Express' APY of 3.20% with other banks
Compare Betterment's APY of 3.90% with other banks
| Bank Pair | Competitor APY | Min Deposit |
|---|---|---|
| Betterment vs Ally Bank | 3.20% | $0 |
| Betterment vs Axos Bank | 4.21% | $0 |
| Betterment vs Barclays | 3.85% | $0 |
| Betterment vs Capital One | 3.20% | $0 |
| Betterment vs Chime | 3.00% | $0 |
| Betterment vs CIT Bank | 3.75% | $100 |
| Betterment vs Discover Bank | 3.30% | $0 |
| Betterment vs EverBank | 3.90% | $0 |
| Betterment vs Marcus by Goldman Sachs | 3.65% | $0 |
| Betterment vs Newtek Bank | 4.20% | $0.01 |
| Betterment vs Openbank | 4.09% | $500 |
| Betterment vs Pibank | 4.60% | $0 |
| Betterment vs SoFi Bank | 4.00% | $0 |
| Betterment vs Synchrony Bank | 3.50% | $0 |
| Betterment vs Varo Bank | 5.00% | $0 |
| Betterment vs Wealthfront | 4.20% | $0 |