American Express vs. Capital One
High-Yield Savings Account Comparison
Last Updated: October 14, 2025
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Summary of American Express vs. Capital One
Key Metrics at a Glance
| Feature | American Express | Capital One |
|---|---|---|
| Top Savings APY | 3.50% High Yield Savings Account | 3.40% 360 Performance Savings |
| Minimum to Open | $0 | $0 |
| Minimum Balance for APY | $0 | $0 |
American Express
Strengths
- American Express offers a competitive APY of 3.50%, unchanged from 30 days ago.
- No maintenance fees or minimum balance requirements for the High Yield Savings Account.
- American Express has a high App Store rating of 4.9.
Potential Drawbacks
- American Express has an F rating from the BBB and is not accredited.
- No physical branches available for in-person banking.
- Google Play rating is lower at 3.7.
Capital One
Strengths
- Capital One has an A+ BBB rating and is accredited.
- Over 200 branches available for customer convenience.
- Capital One has a higher Google Play rating of 4.5.
Potential Drawbacks
- Current APY for Capital One is lower at 3.40%, down from 3.50% 30 days ago.
- No maintenance fees or minimum balance requirements for the 360 Performance Savings account.
- App Store rating matches American Express at 4.9.
Summary: American Express offers a slightly higher APY of 3.50% compared to Capital One's 3.40%, though Capital One has a superior A+ BBB rating and over 200 branches. Both banks have no maintenance fees, but American Express lacks physical locations and has a lower Google Play rating. Users seeking higher APY might prefer American Express, while those valuing branch access and BBB accreditation may lean towards Capital One.
→ As of October 14, 2025 American Express offers an APY of 3.50% for its High Yield Savings Account, with a minimum balance of $0, compared to Capital One's 3.40% APY for its 360 Performance Savings account, with a minimum balance of $0.
→ American Express yields $10 more than Capital One on a $10,000 balance after one year. American Express pays $350, while Capital One pays $340 - an APY advantage for American Express.
Calculate Savings Growth for American Express vs Capital One
All calculations are based on APY.
American Express
APY: 3.50%
Total savings breakdown:
- Interest earned: $2,114.1 (10.51%)
- Total contributions: $13,000 (64.63%)
- Initial deposit: $5,000 (24.86%)
Your total balance
$20,114.10
Effective APY: 3.50% (based on your deposit and contributions)
Total balance: $20,114.1
Earnings: $2,114.1
Bank OverviewCapital One
APY: 3.40%
Total savings breakdown:
- Interest earned: $2,050.5 (10.23%)
- Total contributions: $13,000 (64.84%)
- Initial deposit: $5,000 (24.94%)
Your total balance
$20,050.50
Effective APY: 3.40% (based on your deposit and contributions)
Total balance: $20,050.5
Earnings: $2,050.5
Bank OverviewWith a $5,000 initial deposit and $13,000 in total contributions over 5 years, American Express's total earnings would be $63.6 higher than Capital One's total earnings.
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
Compare American Express' vs Capital One's Savings Accounts
| American Express | Capital One | ||
|---|---|---|---|
| Product | High Yield Savings Account | vs | 360 Performance Savings |
| APY | 3.50% (as of 10/14/2025) | 3.40% (as of 10/14/2025) | |
| Bundled Account | No | No | |
| FDIC-insured | Yes | Yes | |
| Online Only | Yes | No | |
| Compound Frequency | Daily | Monthly | |
| Minimum Deposit | $0 | $0 | |
| Minimum Balance for APY | $0 | $0 | |
| Maintenance Fee | $0 | $0 | |
| Direct Deposit Required | No | No | |
| App Store Rating | 4.9/5 | 4.9/5 | |
| Google Play Rating | 3.7/5 | 4.5/5 | |
| BBB Rating | F | A+ |
Comparative Historical APY Insights (Last 9 Months)
| American Express | Capital One | ||
|---|---|---|---|
| Product | High Yield Savings Account | vs | 360 Performance Savings |
| Latest APY | 3.50 % | 3.40 % | |
| Trend | Sideways | Sideways | |
| Slope (bps/mo) | -3.8 | -3.7 | |
| Rate Changes / Mo | 0.34 | 0.45 | |
| Days Since Last Change | 83 | 13 | |
| High (-9 m) | 3.80 % | 3.80 % | |
| Low (-9 m) | 3.50 % | 3.40 % | |
| Draw-down from High | -7.9 % | -10.5 % | |
| Volatility (CV) | 0.028 | 0.028 |
APY Insights Glossary
- Latest APY
- Most recent advertised annual-percentage yield.
- Trend
- Direction over the last 9 months (regression slope).
- Slope (bps/mo)
- Average monthly change; 10 bps = 0.10 pp.
- Rate Changes / Mo
- Typical number of APY moves per month.
- Days Since Last Change
- Recency of the latest APY adjustment.
- High (-9 m)
- Highest APY in the last 266 days.
- Low (-9 m)
- Lowest APY in the last 266 days.
- Draw-down from High
- How far today sits below the 9-month peak.
- Volatility (CV)
- Coefficient of variation = stdev ÷ mean.
Why Track Savings-Account APYs?
- See how quickly a bank reacts to Fed moves or competition.
- Gauge “twitchiness” - frequent moves can annoy savers.
- Spot if you're buying near a peak (draw-down) or riding a rise.
- Slope (bps/mo) shows speed of change.
- Volatility (CV) scales jumps by average level.
More Comparisons
Compare American Express' APY of 3.50% with other banks
Compare Capital One's APY of 3.40% with other banks
| Bank Pair | Competitor APY | Min Deposit |
|---|---|---|
| Capital One vs Ally Bank | 3.40% | $0 |
| Capital One vs Axos Bank | 4.51% | $0 |
| Capital One vs Bank of America | 0.01% | $100 |
| Capital One vs Barclays | 4.10% | $0 |
| Capital One vs BrioDirect | 4.20% | $5,000 |
| Capital One vs Chase Bank | 0.01% | $0 |
| Capital One vs Chime | 3.75% | $0 |
| Capital One vs CIT Bank | 3.85% | $100 |
| Capital One vs Discover Bank | 3.40% | $0 |
| Capital One vs Elevault | 4.34% | $0 |
| Capital One vs EverBank | 4.05% | $0 |
| Capital One vs Fitness Bank | 4.75% | $100 |
| Capital One vs FVCbank | 4.10% | $500 |
| Capital One vs GO2bank | 4.50% | $0 |
| Capital One vs Marcus by Goldman Sachs | 3.65% | $0 |
| Capital One vs Neighbors Bank | 4.50% | $0 |
| Capital One vs Newtek Bank | 4.35% | $0 |
| Capital One vs Peak Bank | 4.20% | $100 |
| Capital One vs Pibank | 4.60% | $0 |
| Capital One vs Presidential Bank | 4.50% | $5,000 |
| Capital One vs Santander Bank | 0.01% | $25 |
| Capital One vs SoFi Bank | 4.50% | $0 |
| Capital One vs Synchrony Bank | 3.80% | $0 |
| Capital One vs TIMBR | 4.40% | $1,000 |
| Capital One vs UFB Direct | 3.96% | $5000 |
| Capital One vs Varo Bank | 5.00% | $0 |
| Capital One vs Wells Fargo | 0.05% | $25 |
| Capital One vs Zynlo Bank | 4.20% | $10 |