TL;DR
- Confirmed Release Date & Time: September 24, 2026, after market close
- Fiscal Quarter: Q4 2026
- Consensus Estimates: EPS of $6.55 | Revenue of $94.85 Billion
- Implied Move: ±3.53% (~$31.50 implied straddle move)
- Single Biggest Swing Factor: Core gross margin performance amidst higher fuel/transportation costs, balanced against the pace and pricing impact of U.S. IEEPA tariff refund pass-through to members.
Setup Overview
Costco Wholesale Corporation (COST) approaches its Q4 2026 earnings release with consensus expecting $6.55 in EPS on revenue of $94.85 billion. While consensus estimate revisions have remained stable heading into the print, analyst commentary signals key operational crosscurrents. On one hand, peer data from warehouse club operators like BJ's Wholesale (+3.1% ex-gas comp, +9.9% membership fee income) points to resilient consumer demand for the club model. On the other hand, higher fuel and supply chain costs present gross margin risk, while management's strategy of passing U.S. IEEPA tariff refund proceeds directly back to members via lower shelf pricing could temporarily suppress reported gross margins even as it supports volume and member loyalty.
Historical Pattern
Costco maintains a strong fundamental record, exceeding consensus EPS estimates in 7 of the past 8 quarters. However, the stock exhibits a marked history of post-earnings selling pressure regardless of top/bottom-line beats. COST traded lower following 5 of its last 8 releases, including after EPS beats in Q3 2026 (-3.91%), Q4 2025 (-2.90%), and Q4 2024 (-0.80%). This historical asymmetry underscores that beats alone are insufficient for upside; investors focus heavily on gross margin trajectory and membership metric acceleration.
| Fiscal Quarter | EPS Beat/Miss | Post-Earnings Price Reaction (%) |
|---|---|---|
| Q3 2026 | Beat | -3.91% |
| Q2 2026 | Beat | +1.58% |
| Q1 2026 | Beat | -0.01% |
| Q4 2025 | Beat | -2.90% |
| Q3 2025 | Beat | +1.50% |
| Q2 2025 | Miss | -6.60% |
| Q1 2025 | Beat | -0.20% |
| Q4 2024 | Beat | -0.80% |
What to Watch
- Gross Margin Dynamics & Tariff Refund Allocation: Assess how core gross margins (ex-fuel) absorb freight and supply chain inflation, and monitor how management recognizes and passes through IEEPA tariff refunds into shelf price reductions.
- Membership Fee Growth & Retention: Track membership fee income momentum and North American/international renewal rates to confirm underlying brand strength.
- Warehouse Expansion Execution: Check progress on the updated FY2026 expansion target of 26 net new openings (down from 28 previously, with 2 pushed to FY2027) and confirmation of the long-term 30+ annual opening rate.