American Express vs Discover Bank
High-Yield Savings Accounts Comparison
Last Updated: August 29, 2025
We earn a commission if you open an account through some links on this page.
Summary of American Express vs. Discover Bank
As of 8/29/2025 both American Express (High Yield Savings Account) and Discover Bank (Online Savings Account) 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
Potential Drawbacks
- American Express has a BBB rating of F and is not accredited.
- American Express has a lower Google Play rating of 3.8 compared to Discover's 4.3.
Discover Bank
Strengths
- Discover Bank has a BBB rating of A+ and is BBB accredited.
- Discover Bank has a higher Google Play rating of 4.3 compared to American Express's 3.8.
Potential Drawbacks
Summary: Both American Express and Discover Bank offer high-yield savings accounts with an APY of 3.5%. However, Discover Bank stands out with an A+ BBB rating and accreditation, while American Express has an F rating and is not accredited. Additionally, Discover Bank's Google Play rating is higher at 4.3, compared to American Express's 3.8, indicating a better user experience on that platform.
Compare American Express' vs Discover Bank's Savings Accounts
| American Express | Discover Bank | ||
|---|---|---|---|
| Product | High Yield Savings Account | vs | Online Savings Account |
| 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 | Yes | |
| Compound Frequency | Daily | Daily | |
| 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 | 4.3/5 | |
| BBB Rating | F | A+ |
Comparative Historical APY Insights (Last 7 Months)
| American Express | Discover Bank | ||
|---|---|---|---|
| Product | High Yield Savings Account | vs | Online Savings Account |
| Latest APY | 3.50 % | 3.50 % | |
| Trend | Sideways | Sideways | |
| Slope (bps/mo) | -4.2 | -4.3 | |
| Rate Changes / Mo | 0.41 | 0.41 | |
| Days Since Last Change | 38 | 65 | |
| High (-7 m) | 3.80 % | 3.75 % | |
| Low (-7 m) | 3.50 % | 3.50 % | |
| Draw-down from High | -7.9 % | -6.7 % | |
| Volatility (CV) | 0.026 | 0.026 |
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 Discover Bank
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 OverviewDiscover Bank
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 Discover Bank'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 Capital One | 3.50% | $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 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 Discover Bank's APY of 3.50% with other banks
| Bank Pair | Best APY | Min Deposit |
|---|---|---|
| Discover Bank vs Ally Bank | 3.50% | $0 |
| Discover Bank vs Axos Bank | 4.46% | $0 |
| Discover Bank vs Bank of America | 0.01% | $100 |
| Discover Bank vs Barclays | 4.10% | $0 |
| Discover Bank vs Capital One | 3.50% | $0 |
| Discover Bank vs Chase Bank | 0.01% | $0 |
| Discover Bank vs Chime | 3.75% | $0 |
| Discover Bank vs CIT Bank | 4.00% | $100 |
| Discover Bank vs Fitness Bank | 4.85% | $100 |
| Discover Bank vs Marcus by Goldman Sachs | 3.65% | $0 |
| Discover Bank vs Presidential Bank | 4.50% | $5,000 |
| Discover Bank vs SoFi Bank | 3.80% | $0 |
| Discover Bank vs Synchrony Bank | 3.80% | $0 |
| Discover Bank vs UFB Direct | 4.21% | $5000 |
| Discover Bank vs Varo Bank | 5.00% | $0 |
| Discover Bank vs Wells Fargo | 2.51% | $25 |