Costco Does Everything Wrong (And Wins)
There’s a company that breaks every rule.
There’s a company that breaks every rule.
They charge you $65 just to walk in the door.
They stock 3,800 products. Walmart stocks 120,000.
They spend $0 on ads. Amazon spends $20 billion.
They cap their profit at 14%. Wall Street says that’s insane.
They pay workers MORE during recessions.
And 92% of customers renew every year.
For 40 years straight.
Through recessions. Pandemics. Market crashes.
This is Costco.
And they figured out something most businesses miss:
Trust compounds faster than profit.
What You Need to Know First
If you’ve been following along:
Chapter I → You can’t learn from events you never experience (the turkey problem)
Chapter II → Value is compressed information, not stored money
Chapter III → Companies die from inability to learn (the 4 archetypes)
Today → The 6 patterns that make Costco unbreakable
Pattern 1: The Membership Filter
Most stores want everyone to walk in.
Costco wants the opposite.
The $65 fee filters out people who aren’t serious.
Only committed buyers get through.
Why this matters:
1,000 random people = noise
100 committed buyers = signal
Every data point inside Costco is valuable.
No browsing. No tire kickers. Pure signal.
This is how they:
Stock only 3,800 products (they know what sells)
Predict demand perfectly
Turn inventory 12x per year
The filter is the moat.
Pattern 2: The 14% Rule
Costco’s max markup on anything: 14%
Not 15%. Not 13.5%. Not “around 14%.”
Exactly 14%.
Always.
What happened during COVID:
Amazon sellers charged $50 for toilet paper.
Costco kept it at $20.
What happened in 2008:
Competitors raised prices.
Costco held the line.
What’s happening now with inflation:
Everyone’s raising prices.
Costco’s CEO: “We’ll be the last to raise prices and the first to lower them.”
40 years. Same rule. Never broken.
This isn’t pricing. This is signaling.
When everyone else exploits a crisis, Costco absorbs it.
That’s a costly signal.
And costly signals are the only credible signals.
Pattern 3: The Speed Advantage
Costco turns inventory 12x per year.
Walmart does 8x.
So what?
Think of it like learning cycles.
More cycles = faster learning.
In 40 years:
Costco: 480 cycles
Walmart: 320 cycles
That’s 160 extra iterations to learn:
What sells
What doesn’t
What creates loyalty
Speed is learning.
And learning is survival.
Pattern 4: Less is More
Costco: 3,800 products
Walmart: 120,000 products
Amazon: 12 million products
More choice = worse decisions.
Barry Schwartz proved this.
Too many options → decision paralysis → regret.
Costco does the opposite:
One olive oil brand.
And when they stock it, they’re saying:
“We did the research. This is the best one.”
That’s not a limitation.
That’s curation.
And curation builds trust faster than variety.
Pattern 5: Kirkland Signature
Kirkland = Costco’s private label.
Started 1995: $0 in sales
Today: $75 billion in sales
Why this works:
Every Kirkland product is a bet.
If Kirkland batteries suck, you don’t just stop buying batteries.
You question everything Costco recommends.
That’s existential risk.
But when Kirkland is good:
Trust goes up
More people buy Kirkland
Costco negotiates better deals
Quality improves
Trust goes up → loop
32% annual growth for 29 years.
Faster than Costco’s total growth.
Zero marketing cost.
Just reputation on repeat.
Pattern 6: Zero Ads
Costco ad spend: $0
Walmart: $2.5 billion
Amazon: $20+ billion
Target: $1.8 billion
Why?
When your friend says “Costco is worth it” → you listen.
They paid $65. They have skin in the game.
When Costco says it in an ad → cheap talk.
Net Promoter Score:
Costco: 79
Amazon: 69
Walmart: 31
Highest in retail.
With zero ad dollars.
Word of mouth compounds.
Ads decay.
How These 6 Patterns Work Together
Membership filter → committed buyers
↓
Who trust the 14% rule
↓
And shop frequently (velocity)
↓
From a curated selection
↓
Including Kirkland (vertical trust)
↓
And tell their friends (no ads needed)
↓
Who join → LOOPBreak one pattern, the system fails.
Maintain all six, you get 40 years of compounding.
The 40-Year Test
Here’s the real question:
Did this actually work during real crises?
2008 Financial Crisis
Everyone else:
Layoffs
Price increases
Wage cuts
Costco:
Zero layoffs
Zero price increases
Zero wage cuts
Wall Street called them crazy.
What happened:
Membership renewals went from 87% to 87.5%.
THEY WENT UP.
During the worst recession in 80 years.
Stock dropped 48.5%.
Recovered in 1.8 years.
2020 COVID-19
Toilet paper on Amazon: $50/pack
Hand sanitizer: $25/bottle
Costco:
No price increases.
Hired 19,000 workers.
Gave everyone $2/hour extra.
Results:
Renewals: 90.5% → 91% (up again)
Stock dropped: 13.6% (smallest in 40 years)
Recovery: 4 months
The Succession Test
Jim Sinegal (founder) retired in 2012.
Craig Jelinek led until 2024.
Ron Vachris is CEO now.
The question:
Can this survive without the founder?
Historical precedent is ugly:
Apple without Jobs (1985-1997) → almost bankrupt
Microsoft without Gates → 14 years underwater
Disney without Walt → decades of mediocrity
12 years later, all 6 patterns still hold:
Membership filter
14% rule
Velocity
Limited SKUs
Kirkland
Zero ads
Costco isn’t Jim Sinegal.
Costco is a self-reinforcing system.
What This Means for You
Stop looking for “moats.”
Everyone knows that playbook now.
Start looking for epistemic capital.
Companies that:
Filter customers (membership/subscription)
Have pricing discipline (kept their word for decades)
Turn inventory fast (learning speed)
Curate ruthlessly (trust through selection)
Build their own brands (vertical trust)
Don’t need ads (word of mouth proof)
Buy them during crashes.
The pattern says:
They’ll recover
The timeline is predictable
They get stronger each time
This post is the summary.
The full version has:
→ Read the full interactive Chapter IV here
Free. No paywall.
Thanks for reading,
Guillermo Valencia A
Co-founder of MacroWise
Podcast de Alejandro Salazar + Guillermo 🙏🏻🙏🏻🙏🏻
Gracias por compartir Guille. No conocía muchos de estos datos! Te faltó uno que es ganador! El combo de Hot Dog a $1,50 :)