Understanding Costco revenue growth means looking beyond the top-line number. Segment-level revenue trends reveal which parts of Costco's business are accelerating, which are losing momentum, and where the real drivers of performance sit. For investors evaluating COST revenue trends, breaking the business into its core components gives a much clearer picture than a single growth rate ever could.
Key takeaways
- Costco's total revenue growth has consistently outpaced most big-box peers, but the rate of acceleration varies meaningfully across segments.
- Membership fee income tends to grow at a steadier clip than merchandise sales, making it a useful signal for underlying business health.
- E-commerce and ancillary services have been faster-growing segments, though they start from a smaller base.
- Comparing Costco sales growth to Walmart and Target requires adjusting for differences in store count expansion, same-store sales, and product mix.
- Revenue growth alone doesn't tell you whether a retailer is gaining share profitably. Pair it with margin and traffic data for a fuller picture.
What does Costco revenue growth actually measure?
When people talk about Costco revenue growth, they usually mean year-over-year change in net sales. But that single number blends together a lot of moving pieces: new warehouse openings, same-store sales (called "comparable sales" or "comps"), membership fee increases, e-commerce expansion, and even gasoline price fluctuations.
The headline COST growth rate can look dramatically different depending on whether gas prices spiked or fell during the period. Costco reports fuel sales as part of net sales, and because gasoline is a high-revenue, low-margin product, swings in oil prices can inflate or deflate top-line growth without changing much about the core business.
Comparable sales (comps): Revenue growth at warehouses open for at least 12 months, excluding the impact of fuel prices and foreign exchange. This strips out noise and shows whether existing locations are attracting more spending per visit or more visits. It's the single most watched metric in retail earnings.
So if you're trying to understand the real trajectory, start with comps excluding gas and FX. That's where the signal lives.
How fast is Costco sales growth compared to Walmart and Target?
Costco has historically posted stronger comparable sales growth than both Walmart and Target over multi-year periods. There are structural reasons for this. Costco's membership model creates a self-selecting customer base with higher household incomes and stronger spending consistency. Members pay upfront, which creates a psychological incentive to shop more frequently to "justify" the fee.
Walmart, by contrast, operates across a much broader income spectrum and relies more heavily on grocery (which carries thinner margins and more price sensitivity). Target leans into discretionary categories like home décor and apparel, which tend to be more cyclical. When consumers pull back on non-essentials, Target's comps feel it first.
Here's a rough framework for benchmarking:
- Costco: Comparable sales growth has typically run in the mid-to-high single digits over trailing multi-year periods, with occasional dips during deflationary stretches.
- Walmart U.S.: Comps tend to land in the low-to-mid single digits, with Walmart's scale making each percentage point of growth worth enormous dollar amounts.
- Target: More volatile, ranging from negative comps in tough discretionary environments to high single digits when consumer confidence is strong.
The takeaway isn't that Costco is "better." It's that the growth profiles are different because the business models are different. Comparing COST revenue trends to Walmart without adjusting for store count, product mix, and customer demographics leads to misleading conclusions.
Which Costco segments are accelerating?
Costco doesn't break out segment revenue the way a diversified conglomerate might, but you can still decompose growth into meaningful buckets: core warehouse merchandise sales, e-commerce, membership fees, and ancillary businesses (pharmacy, optical, food court, gasoline).
E-commerce
Costco's online business has been one of its faster-growing areas over the past several years. The company was a late mover in e-commerce compared to Walmart and Target, but it's been investing in logistics, expanding its online assortment (especially in categories like furniture, electronics, and grocery delivery), and building out third-party marketplace-style partnerships. E-commerce comps have frequently outpaced total company comps by a wide margin.
That said, e-commerce still represents a relatively small share of total Costco revenue. Fast percentage growth off a small base can look impressive without meaningfully moving the needle on consolidated results. Watch the dollar contribution, not just the growth rate.
Membership fees
This is the segment investors should pay closest attention to, even though it's the smallest in dollar terms. Membership fee income grows through two levers: increasing the number of members, and raising the annual fee. Costco has historically raised fees roughly every five to six years, and each increase tends to have minimal impact on renewal rates (which consistently hover above 90% in the U.S. and Canada).
Membership renewal rate: The percentage of members who renew their annual membership. A rate above 90% signals strong customer loyalty and predictable recurring revenue. Declines here would be an early warning sign for the entire business model.
When Costco announces a fee increase, membership fee income accelerates for the following 12 months. Between increases, growth in this line comes from net new member additions, which tend to track warehouse openings.
Gasoline
Gas is a traffic driver more than a profit center. Costco prices fuel below most competitors to pull members into the parking lot, and those members often walk into the warehouse afterward. Gas revenue can swing dramatically based on commodity prices, so it distorts the headline COST growth rate. Strip it out when evaluating the health of the core business.
What's slowing down?
The core warehouse merchandise business, which is the vast majority of revenue, tends to grow more slowly than e-commerce simply because of its size. When Costco was opening 20-30 new warehouses per year globally, total sales growth got a nice tailwind from new store contributions. As the U.S. market matures and the best real estate gets absorbed, the pace of domestic openings may moderate.
International expansion (particularly in Asia and Europe) has been a growth lever, but new market entry is expensive and ramp-up periods are longer. A warehouse in Japan or France may take several years to reach the productivity levels of a mature U.S. location.
Food and sundries, one of Costco's largest merchandise categories, also tends to grow more in line with inflation than through real volume gains. When food inflation runs high, it flatters the top line. When it normalizes, Costco sales growth in this category can look like it's decelerating even if unit volumes are stable.
This is why acceleration vs. deceleration analysis matters. A slowdown in the growth rate doesn't always mean the business is weakening. Sometimes it means a temporary tailwind (like food inflation or a membership fee hike) is cycling out of the comparison period.
How to analyze COST revenue trends yourself
If you want to dig into this, here's a practical framework:
- Pull trailing comparable sales data for at least 12 quarters. Look at the trend line, not individual quarters. One strong or weak quarter can mislead you.
- Separate comps into traffic and ticket. Costco occasionally discloses whether growth is coming from more transactions (traffic) or higher spending per trip (ticket). Traffic-driven growth is generally more durable.
- Back out gasoline and FX effects. Costco reports adjusted comps in its monthly sales releases. Use those numbers.
- Track membership fee income growth and renewal rates. If renewal rates dip below 90%, that's a yellow flag worth investigating.
- Compare to peers on a like-for-like basis. Use comps rather than total revenue growth, since Walmart and Target have different store opening cadences.
- Check the COST stock page on Rallies.ai for a consolidated view of financial data and AI-powered analysis.
You can also use the Rallies Vibe Screener to filter for retailers with specific growth characteristics and compare them side by side.
Why revenue growth alone isn't enough
Here's the thing about revenue growth: it's necessary but not sufficient. A retailer can grow sales by opening stores, cutting prices, or running promotions, but if margins compress in the process, shareholders don't benefit.
Costco's model is unusual because it deliberately keeps merchandise margins razor-thin (typically capping markups around 14-15% on most items). Profit comes primarily from membership fees. So when you evaluate Costco revenue growth, you're really evaluating whether the company can keep growing its member base and convincing those members to renew.
The revenue growth feeds the flywheel: more sales volume gives Costco better purchasing power, which keeps prices low, which drives renewals and new sign-ups, which grows membership fee income. If top-line growth stalls, the flywheel slows.
For context on how financial metrics like revenue growth fit into a broader evaluation framework, it helps to pair growth data with operating margin trends, return on invested capital, and free cash flow generation.
Try it yourself
Want to run this kind of analysis on your own? Copy any of these prompts and paste them into the Rallies AI Research Assistant:
- Walk me through Costco's revenue growth — how fast are total sales growing, which segments are accelerating vs. slowing down, and how does their growth compare to other big-box retailers like Walmart and Target?
- How fast is Costco growing? Break down revenue growth by segment and whether it's accelerating or slowing.
- Compare Costco's comparable sales trends over the past several years to Walmart and Target, and highlight which retailer has the strongest growth trajectory.
Frequently asked questions
What is Costco's typical revenue growth rate?
Costco's total net sales have generally grown in the high single digits to low double digits on a year-over-year basis over extended periods, though this varies with store openings, gas prices, and inflation. Comparable sales growth, which strips out new store contributions, has typically run in the mid-to-high single digits. The COST growth rate looks different depending on whether you include or exclude fuel.
How does COST revenue compare to Walmart's?
In dollar terms, Walmart's revenue is several times larger than Costco's. But on a comparable-sales growth basis, Costco has frequently outpaced Walmart U.S. over multi-year stretches. The businesses serve different customer demographics and use different models, so direct comparisons require adjusting for product mix, store format, and membership dynamics.
What drives Costco sales growth the most?
Three main factors: new warehouse openings (which add incremental revenue), comparable sales growth at existing warehouses (driven by traffic and average ticket), and membership fee increases (which happen roughly every five to six years). E-commerce is a growing contributor but still a small share of the total.
Is Costco's revenue growth accelerating or decelerating?
It depends on the time frame and which segment you're examining. E-commerce and international operations have been areas of acceleration. Core domestic warehouse comps tend to fluctuate with consumer spending patterns and food inflation. To assess the current trend, look at sequential quarterly comps and whether traffic gains are holding. You can explore this using the Rallies AI Research Assistant.
Why do gas prices affect Costco's revenue growth?
Costco reports gasoline sales as part of net revenue. Because gas is a high-dollar, high-volume product, swings in oil prices can significantly inflate or deflate the headline growth number. Costco reports comparable sales both including and excluding gas for this reason. Investors focused on core business trends should use the ex-gas figure.
How does Costco's membership model affect its growth metrics?
The membership model creates a recurring revenue stream that's largely independent of merchandise sales trends. High renewal rates (consistently above 90% in North America) make membership fee income one of the most predictable revenue lines in retail. It also means Costco can tolerate lower merchandise margins than competitors, which reinforces pricing advantages and drives traffic.
What financial metrics should I pair with COST revenue analysis?
Revenue growth tells you about the top line, but pairing it with operating margin, membership fee income growth, renewal rates, and return on invested capital gives a much more complete picture. A company can grow revenue while destroying value if margins compress or capital allocation is poor. Look at the full set of financial metrics together.
Bottom line
Costco revenue growth is one of the more consistent stories in retail, but the headline number can mislead if you don't break it apart. Segment-level analysis, separating comps from new store growth, stripping out gas and FX effects, and tracking membership fee income, gives you a far more accurate read on where the business actually stands. Comparing the COST growth rate to peers like Walmart and Target requires adjusting for fundamentally different business models.
If you want to go deeper on how to evaluate retail growth metrics and build a research process around them, explore more on financial metrics analysis and use the tools on Rallies.ai to do your own research before making any investment decisions.
Disclaimer: This article is for educational and informational purposes only. It does not constitute investment advice, financial advice, trading advice, or any other type of advice. Rallies.ai does not recommend that any security, portfolio of securities, transaction, or investment strategy is suitable for any specific person. All investments involve risk, including the possible loss of principal. Past performance does not guarantee future results. Before making any investment decision, consult with a qualified financial advisor and conduct your own research.
Written by Gav Blaxberg, CEO of WOLF Financial and Co-Founder of Rallies.ai.