Costco Could Be Poised for Major Gains Before 2030. Here Is Why Now May Be the Time to Buy.

Costco highlights $5.32B of fiscal 2025 membership fee revenue (+10% YoY) supported by very high renewal rates (92.3% U.S./Canada, 89.8% worldwide). In Q3 fiscal 2026, membership fees rose 10.7% YoY to $1.37B with paid memberships up 4.1% and executive memberships up 9.6%, while digitally enabled comparable sales grew 21.5%. The company also reported strong cash generation ($13.3B operating cash flow in fiscal 2025) and balance sheet liquidity (~$14B cash/cash equivalents), supporting ongoing warehouse expansion and shareholder returns, though shares trade at a premium multiple versus other retailers.

Analysis

The incremental winner is not just COST’s top line, but its ability to keep using membership cash flow as a low-cost financing layer for price leadership. That forces a second-order response from WMT, BJ, TGT, and regional grocers: they can match price only by giving up margin or accept share loss in household staples, which is why the competitive pressure lands hardest on lower-scale operators with less traffic density. Suppliers also lose pricing power over time as Costco’s traffic mix lets it demand better terms while preserving member loyalty.

Near term, the stock is more likely to grind than rerate. The setup is strongest on 1-3 month execution prints where membership growth, fee income mix, and renewal stability can keep beating easier comps; the actual risk is a subtle deceleration in traffic or exec-member mix that the market may ignore until margins start to normalize. Over 6-18 months, the key falsifier is any sign that new warehouse productivity is falling as expansion shifts farther outside the highest-return North American core.

Consensus is treating this like a perpetual compounding machine, but the multiple already discounts a lot of that durability. The miss is that renewal rates are lagging indicators; by the time they weaken, the market will likely have already started compressing the premium multiple. The stock can still work, but upside is more dependent on sustaining above-market growth than on simple defensiveness. If the consumer weakens and management leans harder into traffic protection, COST can remain operationally strong while still underperforming on valuation.

Key Decisions for Investors

• Long COST only on a 5-8% pullback from current levels; the risk/reward is better when the premium multiple resets than after an optimism-driven rally.
• Pair trade: long COST / short BJ over the next 3-6 months. Costco’s membership economics and scale should keep taking share from the smaller club operator if pricing stays aggressive.
• Use COST as a defensive quality hedge against a retail slowdown, but fund it by trimming higher-beta discretionary names like TGT or XRT if consumer confidence rolls over in the next 1-2 quarters.
• Watch the next membership and renewal print as the falsifier: if U.S./Canada renewal rate slips below ~91% or fee growth drops below sales growth, reduce exposure and expect multiple compression.