‹ Costco
Ch 3 · The Moat
Chapter 3 · Competitive Position
Walmart is cheaper. Amazon is faster. Costco is trusted.
When 93% of members renew every year, you're not really competing on price anymore.
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✦ The bottom line
Walmart is cheaper. Amazon is faster. Costco is trusted. That trust is the .
↓ the brief below
✦ Teach me
How often members stay year after year
Each year, members decide whether to renew. Most retailers fight to win you back every visit. Costco fights to win you back once a year. The rate of "yes, I'll renew" is the cleanest read of customer trust there is.
Wall Street calls this
Membership renewal rate
93% means almost nobody quits. That's a moat that costs Costco *almost nothing* to maintain.
Member renewal rate · most recent annual
~93
%
Of every 100 members up for renewal, 93 say yes. That's been steady for decades through every recession.
Source · 10-K · Membership Renewal Rate (FY25 annual disclosure) · Updated May 26, 2026
How the moat got built
1983
First Costco warehouse opens in Seattle. Membership-only from day one.
1990s
Kirkland Signature private label launches. Cheaper and often better than the name brand.
2000s
Renewal rate hits ~90% and stays there through *every* recession and crisis.
Now
130 million members worldwide. Some have been renewing for 30+ years.
✓
Strong
Trust + renewal rate = a that costs almost nothing to maintain.
You just finished
Chapter 3 · MOAT
The Moat
you now read: customer trust as a moat
Up next
Then
Chapter 5 · BEHIND THE NUMBERS
The Story Behind the Numbers
Chapter 6 · RISK
The Quiet Threat