American Express vs. Betterment
American Express's High Yield Savings Account pays 3.00% APY while Betterment's Cash Reserve pays 4.00% 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 $44 more than American Express annually ($344 vs $300).
Choose American Express if you want Zelle for quick transfers. Choose Betterment if getting the best rate matters most, BBB rating matters to you, or you're an Android user.
| Metric | American ExpressHigh Yield Savings Account Aug 21, 2026 | BettermentCash Reserve Aug 21, 2026 |
|---|---|---|
| APY | 3.00% | 3.25% - 4.00% |
Est. Earnings | $5,000+$150 $10,000+$300 $25,000+$750 | $5,000+$172 $10,000+$344 $25,000+$859 |
Min Deposit | $0 | $0 |
Snapshot view. Rates subject to change. | ||
| Features | FDIC InsuredNo MinimumsGreat iOS AppZelle® SupportedDaily CompoundingRate Changes Often | FDIC InsuredNo MinimumsGreat iOS AppGreat Android App |
Prefer In-Person Banking?
Both of these institutions are online-only. If you need in-branch access, check out our list of savings accounts with brick-and-mortar locations.
Comparison Analysis
Comparing American Express vs. Betterment
Executive Summary
A detailed summary for this comparison is being prepared. Check back soon.
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?
- ✓Fast transfers via Zelle®
Why Betterment?
- ✓Higher potential APY (4.00% vs 3.00%) on all balances
- ✓Higher rated Android app (4.7 vs 3.6)
Key Feature Differences
Better Returns at $10,000
BettermentBetterment's Cash Reserve earns more on smaller deposits (approx. $344 vs $300/yr).
Better Returns at $25,000
BettermentBetterment's Cash Reserve pulls ahead with larger amounts (approx. $859 vs $750/yr).
Best for Simplicity
BettermentBetterment's Cash Reserve offers 4.00% APY with no bundling, direct deposit requirement or caps.
Shared Benefits
Over a 1-year period (factoring in a 3-month promo), Betterment's Cash Reserve pays $44 more interest on a $10,000 balance than American Express's High Yield Savings Account.
*Betterment's calculation includes their 3-month introductory promotional rate and subsequent standard rate.
Non-sponsored link to official site
Non-sponsored link to official site
Top Market Contenders
American Express vs. Betterment Savings Calculator
You earn $45.1 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+$300.00(2.9%)
- Total Contributions$0
- Initial Deposit$10,000
Projected Balance
$10,300.00
Betterment
Cash Reserve
Savings Breakdown
- Interest Earned+$345.10(3.3%)
- Total Contributions$0
- Initial Deposit$10,000
Projected Balance
$10,345.10
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 $299 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 | 3.00% Verified: 8/21/2026 ↘︎ 0.10%90d Change | 4.00% Range: 3.25% - 4.00% Verified: 8/21/2026 - |
| Product Name | High Yield Savings Account | Cash Reserve |
| Minimum Deposit | $0 | $0 |
| Min. Balance for APY | $0 | $0 |
| Monthly Fee | $0 | $0 |
| Compound Frequency | Daily | N/A |
| In-Branch Access | No | No |
| Account Type | Online Only | Online Only |
| Physical Branches | None | None |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | ||
| FDIC or NCUA Insured | YesVerify FDIC | Yes |
| Zelle® Support | Available Requires Amex Rewards Checking; not available for standalone HYSA. | Not Supported |
| BBB Rating | F | A- |
| 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 | 3.00% | 4.00% |
Trend | Stable | Stable |
Velocity (bps/mo) | -4.1 | 1.8 |
Days Since Change | 42 | 115 |
7-Month High | 3.20% | 4.00% |
7-Month Low | 3.00% | 3.90% |
Adjustments / Mo | 0.29 | 0.14 |
Volatility Score | 0.027 | 0.013 |
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 3.00% with other banks
Compare Betterment's APY of 4.00% with other banks
| Bank Pair | Competitor APY | Min Deposit |
|---|---|---|
| Betterment vs Ally Bank | 3.00% | $0 |
| Betterment vs Axos Bank | 4.21% | $0 |
| Betterment vs Barclays | 3.65% | $0 |
| Betterment vs Capital One | 3.50% | $0 |
| Betterment vs Chime | 3.75% | $0 |
| Betterment vs CIT Bank | 3.75% | $100 |
| Betterment vs EverBank | 3.90% | $0 |
| Betterment vs Marcus by Goldman Sachs | 3.40% | $0 |
| Betterment vs Newtek Bank | 4.20% | $100 |
| Betterment vs Openbank | 3.80% | $500 |
| Betterment vs Pibank | 4.10% | $0 |
| Betterment vs SoFi Bank | 3.80% | $0 |
| Betterment vs Synchrony Bank | 3.30% | $0 |
| Betterment vs Varo Bank | 3.75% | $0 |
| Betterment vs Wealthfront | 3.95% | $0 |