Costco vs Sam's Club: The $5 Fee Gap That Just Replaced the $15 One

On April 1, 2026, Sam's Club announced it will raise the standard Club membership from $50 to $60 and the Plus tier from $110 to $120 effective May 1 — the first fee increase in four years. Plus members also get a sweetener: the 2% cash-back cap rises from $500 to $750 annually. Existing members can renew up to 75 days early to lock in the old rate, a tactic Walmart-owned Sam's Club is openly encouraging through email campaigns.

The move tells you three things about how Walmart sees the warehouse club business. First, it's a tacit endorsement of Costco's playbook — Costco's last hike (September 2024, +$5) was followed by accelerating renewals and membership-fee income that grew 13.6% in Q2 FY2026. Sam's Club's fee revenue grew only 6.1% in Q4 FY26 from the previous structure. The hike is engineered to close that gap. Second, the cap raise from $500 to $750 makes Plus a more competitive proposition for high-spending households. At $25,000 annual spend, Sam's Club Plus now nets the full $750 minus the $120 fee — $630 — while Costco Executive at the same spend earns $500 net of the $130 fee. The arithmetic just flipped at the high end.

Third, the announcement was paired with the rollout of Express Delivery in as little as one hour, more than 30% adoption of three-hour-or-less delivery options in Q4, and same-day delivery available to 93% of U.S. households via Walmart's logistics backbone. The fee hike is funding the convenience build-out — and convenience is where Sam's Club has structurally outflanked Costco.

For Costco, the read-through is straightforward. The September 2024 fee hike to $65 Gold Star and $130 Executive added an estimated $700 million in run-rate fee income at near-100% incremental margin. The math on the next hike — possibly to $70 Gold Star sometime in 2027 — has to look more attractive after watching Sam's Club close the gap. CFO Gary Millerchip noted on the Q2 FY2026 call that membership fee income now flows through at 13.6% YoY growth, a number that compounds for as long as renewal rates stay above 89%.

The practical effect for shoppers: the warehouse club decision is no longer an arbitrage on a $15 fee differential. With Sam's Club at $60 and Costco at $65, the pricing-power gap collapses to $5 — well within the noise of a single grocery run. The decision shifts to selection (Costco's 3,700 SKUs vs Sam's Club's 5,000), private-label depth (Kirkland's $75B+ vs Member's Mark), payment flexibility (Sam's Club takes all cards; Costco is Visa-only in-store), and delivery (Sam's Club's 1-hour Express vs Costco's slower same-day options).

The tariff regime hitting warehouse clubs has fundamentally shifted since February. On February 20, 2026, the Supreme Court ruled 6-3 in *Learning Resources v. Trump* that IEEPA does not authorize the president to impose tariffs. Chief Justice Roberts wrote for the majority that emergency economic powers were never meant to function as trade policy tools.

The win was short-lived. Within four days, President Trump invoked Section 122 of the Trade Act of 1974 to impose a blanket 10% tariff on all imports. Treasury Secretary Bessent announced in early March that Section 122 rates would increase to 15% — the statutory maximum. Twenty-four states have sued to challenge the replacement tariffs, arguing the balance-of-payments conditions required under Section 122 don't apply. Section 122 tariffs are capped at 150 days, creating a ticking clock that expires in late July 2026.

For Costco, this legal whiplash cuts both ways. The Court of International Trade ordered refunds of duties paid under IEEPA, and CEO Ron Vachris explicitly pledged on the Q2 FY2026 earnings call that recovered tariff charges will be passed back to members through lower prices and better values. A class action lawsuit filed in March alleges Costco passed illegal IEEPA tariff costs to consumers rather than absorbing them. About a third of Costco's US sales come from imported goods, and the company has pulled categories — artificial trees, imported furniture, certain toys — where the tariff math doesn't work at its razor-thin markups. Vachris told investors the "future impact of tariffs remains extremely fluid."

Sam's Club benefits from Walmart's $713 billion purchasing machine. When tariffs hit a product category, Walmart shifts supply chains across 4,700+ US stores and ~600 Sam's Club warehouses simultaneously. Costco, with ~600 standalone locations and no parent company safety net, has to be more surgical: sourcing domestically, consolidating global buying, and quietly absorbing margin hits on staples like bananas, coffee, and cherry tomatoes rather than passing the full cost through.

The Section 232 auto parts tariffs taking effect in April 2026 add another layer of cost pressure across supply chains. While these target automakers directly, the ripple effects on transportation costs and consumer goods pricing will hit both warehouse clubs — Costco's tire centre operations face the most direct exposure. Watch the late-July Section 122 expiry date: if the tariffs lapse without renewal, both clubs see a meaningful margin tailwind, and Costco's promised refund pipeline could accelerate. If they're renewed under a new authority, the import-cost overhang continues.

The sticker price is misleading. Costco's $65 Gold Star membership buys access to a store that suppresses product markups to near-cost levels. Sam's Club's new $60 Club membership (effective May 1, 2026) gets you into a store with Walmart-level margins on most items. For households spending $5,000+ annually at a warehouse club, Costco's lower shelf prices still offset the $5 higher annual fee — though the cushion is thinner than it was at $15.

At the premium tier, the math has flipped at the high end. Costco's $130 Executive membership earns 2% cash back capped at $1,250 annually. Sam's Club's $120 Plus membership now earns 2% capped at $750 (up from $500). A household spending $25,000 annually at Costco hits the $500 cash-back ceiling first ($25k × 2% = $500), netting $370 after the $130 fee. The same household at Sam's Club Plus earns the full $500 (capped) under the old structure — but under the new $750 cap, that household earns $500 net of the $120 fee = $380. The crossover point where Costco Executive beats Sam's Club Plus is now closer to $30,000 in annual spend. Below that, Sam's Club is the better Plus deal. Above $50,000, Costco's higher cap reasserts itself.

Sam's Club still wins decisively on payment flexibility. It accepts Visa, Mastercard, Discover, and Amex in-store and online. Costco restricts in-store purchases to Visa only, forcing cardholders to either carry a dedicated Visa or miss out on their best rewards card. In a tariff environment where every percentage point matters, Sam's Club removes a friction point Costco stubbornly maintains.

Renewal rates still tell the loyalty story. Costco's worldwide renewal rate held at 89.7% in Q2 FY2026 (US/Canada at 92.3%), creating a recurring revenue flywheel that underpins the entire business model. Sam's Club CEO Chris Nicholas told investors on the Q4 FY26 call that membership and renewal rates hit all-time highs — but Walmart still doesn't disclose the absolute number, an information asymmetry that quietly tells you who's winning the renewal war. Industry estimates place Sam's Club renewal in the low-to-mid 80s. That 5-10 point gap is Costco's moat in a single number, and it's why Costco can hike fees more aggressively without bleeding members.

Walmart counters with diversification Costco can't match. Its $100+ billion e-commerce operation, Walmart Connect retail-media platform (now over $4 billion in annual ad revenue), and same-day delivery to 93% of U.S. households give Sam's Club access to digital revenue streams that subsidise the warehouse experience. Sam's Club's Scan & Go mobile checkout — letting shoppers skip the register entirely — represents a tech advantage Costco hasn't replicated. Costco's response has been to lean on AI-powered online search and a digital comparable-sales growth rate (+22.6% in Q2, +23.3% in March) that matches Sam's Club's e-commerce growth (+23% in Q4 FY26). Both clubs are growing digital at the same headline rate; the strategies underneath are very different.

The headline number is identical: Costco's digitally enabled comparable sales grew 22.6% in Q2 FY2026 and 23.3% in March 2026; Sam's Club's e-commerce sales grew 23% in Q4 FY26. But the operating models behind those numbers tell two stories about how warehouse clubs are competing in 2026.

Sam's Club's strategy is convenience saturation. The April 22, 2026 launch of Express Delivery added a one-hour-or-less option built on Walmart's same-day delivery network, which now reaches 93% of U.S. households. In Q4 FY26, more than 30% of Sam's Club orders chose the three-hour-or-less convenience tier — paying a delivery fee on top of membership for time saved. Store-filled delivery sales doubled YoY. Scan & Go mobile checkout has become the default for many members, letting them skip the register entirely. CEO Chris Nicholas pointed to convenience investments as the direct driver of all-time-high membership and renewal rates. The fee hike paying for the convenience build-out is a cleanly engineered loop.

Costco's strategy is leverage of the existing membership base via AI-powered search and curated digital experiences. The April 2026 March-sales release described the company's digital comparable-sales acceleration as benefiting from "AI-powered online sales" — relevance ranking, personalisation, and improved fulfilment integration with the warehouse. Costco has not built out express delivery or Scan & Go equivalents. Instead, it has leaned on the basket size advantage: Costco's average online order is materially larger than Sam's Club's, reflecting the shop-trip-replacement use case rather than the run-out-of-something convenience use case. The 22-23% digital growth comes from existing members shifting more of their spend online, not from net new members or new occasions.

The asymmetry has investment implications. Sam's Club is making a $180+ billion bet that convenience pulls share from grocery delivery (Instacart, Amazon Fresh) and quick-commerce. Costco is betting that the warehouse experience itself remains the moat — and that digital is an extension of the warehouse, not a replacement for it. Both bets can succeed, and both already are: e-commerce growth in the low-20s annually compounds quickly off bases that are now meaningful contributors to both businesses.

The risk on the Sam's Club side is margin compression: the three-hour delivery network requires labour, software, and last-mile infrastructure that all weigh on operating margin. The risk on the Costco side is generational drift — younger shoppers conditioned on one-hour grocery delivery may not develop the warehouse-trip habit that fuels Costco's renewal flywheel. Watch which club's digitally enabled growth holds the 20%+ rate into FY2027 — that's the leading indicator of which strategy is winning the next decade.

On free cash flow, Costco generated $3.84 per share in Q2 FY2026. Walmart produced $0.77 per share in Q4 FY2026. Normalise for share count and Costco's FCF generation is roughly 22x Walmart's on a per-share basis — a staggering gap that reflects the capital-light membership model versus the capital-intensive demands of global omnichannel retail. The April 15, 2026 dividend raise — a $0.17 quarterly bump bringing the annual to $5.88 per share — is funded entirely from operating cash flow with room to spare, and the company has not raised debt to support shareholder returns since the special dividend cycle.

The margin-versus-volume trade-off is the single most important number in this entire comparison. Costco's 12.8% gross margin looks anemic next to Walmart's 24.7%. But the calculation that matters is gross profit dollars per dollar of equity tied up. Costco's lower margin pulls ~3x the volume per warehouse out of a balance sheet roughly half Walmart's size. The membership fee — $4.8 billion annualised at 13.6% growth — is essentially pure profit dropping to the bottom line. That's the structural reason Costco's P/E premium to Walmart has held at 6-7 turns even as both stocks have rerated.

Kirkland Signature generates an estimated $75+ billion in annual sales across categories from olive oil to golf balls, making it one of the world's largest consumer brands by revenue. Products are priced 20-40% below national brands at comparable quality — a strategy that locks in membership renewals and lets Costco earn slightly better margins on its highest-velocity items.

Sam's Club has invested heavily in repositioning Member's Mark from a budget brand to a quality competitor. Recent reformulations have narrowed the perception gap, and Member's Mark now covers everything from organic produce to premium spirits. But Kirkland's cult following — fuelled by social media virality and consistent quality — gives Costco a brand asset that no amount of reformulation can replicate overnight. Reddit communities dedicated to Kirkland product comparisons, the Kirkland Signature Reserve wine program, and the recurring viral moments around new launches give Costco a marketing flywheel that costs nothing.

Costco's SKU discipline amplifies the private-label advantage. With ~3,700 SKUs versus ~5,000, each product generates higher volume per item. Higher volume means better supplier terms, lower per-unit costs, and prices that reinforce the membership value proposition. Sam's Club counters with broader selection and retail media revenue through Walmart Connect — the parent's $4B+ ad business gives Sam's Club access to sponsored-product economics that Costco's smaller digital footprint can't match at the same scale. For margin-conscious shoppers dealing with tariff-inflated prices, Costco's stripped-down approach delivers more savings per trip; for shoppers who want broader choice and aren't margin-optimising every visit, Sam's Club's selection breadth wins.

Both stocks command valuations that price in years of execution. Costco at $999.88 trades at 52.6x trailing earnings (up 15% YTD as of late April). Walmart at $130.05 carries a 45.5x multiple. The gap has held at roughly seven turns — the market is paying up for Costco's simpler, more defensible model as tariff uncertainty rattles complex global supply chains.

Costco's bull case: pure-play membership economics with 89.7% renewal rates, international expansion runway (especially Asia-Pacific and a slower-but-meaningful build-out in Europe), and the optionality of future fee increases that drop almost entirely to the bottom line. The September 2024 fee hike added an estimated $700M in run-rate fee income at near-100% incremental margin. Membership fee income now grows 13.6% YoY while operating expenses grow much more slowly — that's the textbook definition of operating leverage. The IEEPA tariff refund process could provide a one-time margin tailwind if Costco recovers a meaningful portion of duties paid. April 15 dividend raise: $0.17 per quarter, taking the annual to $5.88. Next earnings: May 28, 2026.

Walmart's bull case: diversified retail exposure including Sam's Club (now hiking fees), a $100B+ e-commerce business growing 27% in Q4, Walmart Connect at $4B+ in annual advertising revenue, and a health and wellness push. Walmart's scale gives it more room to absorb Section 122 tariff costs across its massive supply chain, and the dividend is the second-longest streak of consecutive annual increases on the S&P 500. Next earnings: May 15, 2026.

The risk profiles differ meaningfully. Costco faces membership saturation in North America and relies almost entirely on warehouse foot traffic — tariff disruption to its import-heavy mix is the near-term headwind, but the late-July Section 122 expiry could provide relief. The 52.6x multiple leaves zero margin for an earnings disappointment; if comp-sales growth decelerates below 5%, the stock can rerate quickly. Walmart faces margin pressure from aggressive pricing, regulatory scrutiny across its gig workforce, the ongoing capital drain of last-mile delivery infrastructure, and a Section 122 exposure that's smaller per-dollar but spread across far more SKUs.

For the portfolio: Costco is the higher-quality compounder with the simpler business model and stronger balance sheet. Walmart offers diversification and more growth vectors at a lower multiple. If you can only own one warehouse club stock, Costco's membership flywheel and capital efficiency give it the edge for long-term holders — particularly with the next fee hike on the horizon and operating leverage from the September 2024 hike still flowing through. If you want the convenience-delivery thesis without the 52x multiple, Walmart at 45x captures the same warehouse-club exposure plus the rest of the company.