American Express vs Capital One
High-Yield Savings Accounts Comparison
Last Updated: August 29, 2025
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Summary of American Express vs. Capital One
As of 8/29/2025 both American Express (High Yield Savings Account) and Capital One (360 Performance Savings) offer an APY of 3.50% .
Both banks yield $350 in interest on a $10,000 balance after one year. Neither has an APY advantage, so consider other features (fees, access, app ratings, etc.) when choosing.
American Express
Strengths
- American Express offers a High Yield Savings Account with an APY of 3.50%.
- No maintenance fees or minimum balance requirements.
- High App Store rating of 4.9.
Potential Drawbacks
- American Express has an F BBB rating and is not BBB Accredited.
- No physical branches available for in-person banking.
- Google Play rating is only 3.8.
Capital One
Strengths
- Capital One has an A+ BBB rating and is BBB Accredited.
- Over 200 branches provide in-person banking options.
- Higher Google Play rating of 4.5.
Potential Drawbacks
- Capital One's 360 Performance Savings also has an APY of 3.50%.
- No direct deposit requirement may limit some users.
- App Store rating matches American Express at 4.9.
Summary: Both American Express and Capital One offer a High Yield Savings Account with an APY of 3.50%. However, Capital One boasts an A+ BBB rating and over 200 branches, while American Express has no branches and an F BBB rating. Both banks have a high App Store rating, but Capital One's Google Play rating is superior. Customers may prefer Capital One for in-person service and trustworthiness.
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 8/29/2025) | 3.50% (as of 8/29/2025) | |
| 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 | 3.8/5 | 4.5/5 | |
| BBB Rating | F | A+ |
Comparative Historical APY Insights (Last 7 Months)
| American Express | Capital One | ||
|---|---|---|---|
| Product | High Yield Savings Account | vs | 360 Performance Savings |
| Latest APY | 3.50 % | 3.50 % | |
| Trend | Sideways | Sideways | |
| Slope (bps/mo) | -4.2 | -4.1 | |
| Rate Changes / Mo | 0.41 | 0.41 | |
| Days Since Last Change | 38 | 65 | |
| High (-7 m) | 3.80 % | 3.80 % | |
| Low (-7 m) | 3.50 % | 3.50 % | |
| Draw-down from High | -7.9 % | -7.9 % | |
| Volatility (CV) | 0.026 | 0.025 |
APY Insights Glossary
- Latest APY
- Most recent advertised annual-percentage yield.
- Trend
- Direction over the last 7 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 (-7 m)
- Highest APY in the last 220 days.
- Low (-7 m)
- Lowest APY in the last 220 days.
- Draw-down from High
- How far today sits below the 7-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.
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: 3.50%
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 OverviewWith a $5,000 initial deposit and $13,000 in total contributions over 5 years, American Express's total earnings would be the same as Capital One's total earnings.
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
More Comparisons
Compare American Express' APY of 3.50% with other banks
| Bank Pair | Best APY | Min Deposit |
|---|---|---|
| American Express vs Ally Bank | 3.50% | $0 |
| American Express vs Axos Bank | 4.46% | $0 |
| American Express vs Bank of America | 0.01% | $100 |
| American Express vs Barclays | 4.10% | $0 |
| American Express vs Chase Bank | 0.01% | $0 |
| American Express vs Chime | 3.75% | $0 |
| American Express vs CIT Bank | 4.00% | $100 |
| American Express vs Discover Bank | 3.50% | $0 |
| American Express vs Fitness Bank | 4.85% | $100 |
| American Express vs Marcus by Goldman Sachs | 3.65% | $0 |
| American Express vs Presidential Bank | 4.50% | $5,000 |
| American Express vs SoFi Bank | 3.80% | $0 |
| American Express vs Synchrony Bank | 3.80% | $0 |
| American Express vs UFB Direct | 4.21% | $5000 |
| American Express vs Varo Bank | 5.00% | $0 |
| American Express vs Wells Fargo | 2.51% | $25 |
Compare Capital One's APY of 3.50% with other banks
| Bank Pair | Best APY | Min Deposit |
|---|---|---|
| Capital One vs Ally Bank | 3.50% | $0 |
| Capital One vs Axos Bank | 4.46% | $0 |
| Capital One vs Bank of America | 0.01% | $100 |
| Capital One vs Barclays | 4.10% | $0 |
| Capital One vs Chase Bank | 0.01% | $0 |
| Capital One vs Chime | 3.75% | $0 |
| Capital One vs CIT Bank | 4.00% | $100 |
| Capital One vs Discover Bank | 3.50% | $0 |
| Capital One vs Fitness Bank | 4.85% | $100 |
| Capital One vs Marcus by Goldman Sachs | 3.65% | $0 |
| Capital One vs Presidential Bank | 4.50% | $5,000 |
| Capital One vs SoFi Bank | 3.80% | $0 |
| Capital One vs Synchrony Bank | 3.80% | $0 |
| Capital One vs UFB Direct | 4.21% | $5000 |
| Capital One vs Varo Bank | 5.00% | $0 |
| Capital One vs Wells Fargo | 2.51% | $25 |