American Express vs Capital One
High-Yield Savings Accounts Comparison

Last Updated: June 20, 2025

Summary of American Express vs. Capital One

As of 6/20/2025 both American Express (High Yield Savings Account) and Capital One (360 Performance Savings) offer an APY of 3.60% .

Both banks yield $360 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 a competitive APY of 3.60%.
  • No maintenance fees or minimum balance requirements for American Express accounts.
  • American Express has a high App Store rating of 4.9.

Potential Drawbacks

  • American Express has an F BBB rating and is not accredited.
  • No physical branches available for American Express customers.
  • Google Play rating for American Express is lower at 3.8.

Capital One

Strengths

  • Capital One has a strong A+ BBB rating and is BBB accredited.
  • Offers over 200 branches across multiple states for in-person banking.
  • Capital One has a higher Google Play rating of 4.5.

Potential Drawbacks

  • Capital One's 360 Performance Savings also offers a 3.60% APY, with no increase from 30 days ago.
  • No maintenance fees or minimum balance requirements for Capital One accounts.
  • App Store rating for Capital One is 4.9, same as American Express.
Summary: Both American Express and Capital One offer high-yield savings accounts with a 3.60% APY. However, Capital One stands out with an A+ BBB rating and over 200 branches, while American Express lacks physical locations and has an F BBB rating. Both banks have no maintenance fees and high App Store ratings, but Capital One's Google Play rating is notably higher at 4.5 compared to American Express's 3.8.

Compare American Express' vs Capital One's Savings Accounts

American ExpressCapital One
ProductHigh Yield Savings Accountvs360 Performance Savings
APY
3.60% (as of 6/20/2025)3.60% (as of 6/20/2025)
Bundled Account
NoNo
FDIC-insured
YesYes
Online OnlyYesNo
Compound Frequency
DailyMonthly
Minimum Deposit$0$0
Minimum Balance for APY$0$0
Maintenance Fee$0$0
Direct Deposit Required
NoNo
Visit BankHigh Yield Savings Account360 Performance Savings
App Store Rating4.9/54.9/5
Google Play Rating3.8/54.5/5
BBB RatingFA+

Comparative Historical APY Insights (Last 5 Months)

American ExpressCapital One
ProductHigh Yield Savings Accountvs360 Performance Savings
Latest APY3.60 %3.60 %
TrendSidewaysSideways
Slope (bps/mo)-4.4-4.0
Rate Changes / Mo0.400.40
Days Since Last Change4474
High (-5 m)3.80 %3.80 %
Low (-5 m)3.60 %3.60 %
Draw-down from High-5.3 %-5.3 %
Volatility (CV)0.0190.018
APY Insights Glossary
Latest APY
Most recent advertised annual-percentage yield.
Trend
Direction over the last 5 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 (-5 m)
Highest APY in the last 150 days.
Low (-5 m)
Lowest APY in the last 150 days.
Draw-down from High
How far today sits below the 5-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: 3.60%

Total savings breakdown:

  • Interest earned: $36 (3.47%)
  • Total contributions: $0 (0.00%)
  • Initial deposit: $1,000 (96.53%)

Your total balance

$1,036.00

Effective APY: 3.60% (based on your deposit and contributions)

Total balance: $1,036

Earnings: $36

Bank Details

Capital One

APY: 3.60%

Total savings breakdown:

  • Interest earned: $36 (3.47%)
  • Total contributions: $0 (0.00%)
  • Initial deposit: $1,000 (96.53%)

Your total balance

$1,036.00

Effective APY: 3.60% (based on your deposit and contributions)

Total balance: $1,036

Earnings: $36

Bank Details

After 1 year American Express would earn you the same as Capital One.

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