Costco Faces Earnings Test Amid Recent Estimate Revisions

Costco (COST) is preparing to announce financial results for the quarter ended in August 2026, with the market focused on whether the company can sustain its recent growth trajectory. The consensus outlook projects a 10.4% year-over-year increase in earnings per share to $6.48, driven by revenue growth of 10.1% to $94.82 billion. These figures reflect the baseline expectation for the warehouse club operator's performance during the period.

However, recent analyst activity suggests a shift in sentiment regarding the company's near-term profitability. According to data from GN markets/earnings (en-US), the consensus EPS estimate has seen a minor upward revision of 0.18% over the past 30 days. Despite this, the Most Accurate Estimate, which tracks the most recent analyst adjustments, currently sits below the broader consensus, indicating that some investors are tempering their expectations for the September 24 release.

Recent Revisions Signal Cautious Outlook

The divergence between the general consensus and the most recent estimates highlights a lack of strong conviction in a significant earnings beat. The Zacks Earnings ESP model, which measures the likelihood of a surprise based on recent estimate changes, currently reads -0.19% for Costco. A negative reading implies that analysts have recently adjusted their forecasts downward relative to the earlier consensus, suggesting that the actual reported earnings may not exceed the expected $6.48 per share by a wide margin.

This cautious stance is further reflected in the company's current Zacks Rank of #3, a Hold rating. This rank indicates that the stock is expected to perform in line with the broader market rather than significantly outperforming it. For investors, the combination of a negative ESP and a neutral rank suggests that the probability of a substantial positive earnings surprise is diminished compared to peers with stronger recent estimate momentum.

Revenue Growth Remains Core Driver

Despite the uncertainty surrounding the earnings surprise, the underlying business metrics remain robust. The projected revenue increase of 10.1% to $94.82 billion underscores the company's ability to drive top-line growth through its membership base and e-commerce expansion. This revenue expansion is the primary engine supporting the expected EPS growth, providing a solid foundation for the company's financial health even if the bottom-line surprise is modest.

Market Reaction Depends On Beat

The stock's immediate reaction to the September 24 report will likely hinge on the delta between actual results and these consensus figures. While a miss could trigger a negative price adjustment, a beat combined with positive forward guidance could support the stock. Given the current neutral sentiment and negative ESP, investors should monitor the management's commentary on cost controls and membership retention, as these factors will determine the sustainability of the earnings growth beyond the current quarter.