COST vs MCD: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: MCD is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. COST and MCD share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined COST and MCD exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Costco Wholesale operates a membership-based warehouse club chain. Members pay an annual fee (currently $65 for basic Gold Star, $130 for Executive) for access to Costco warehouses, where they can buy products at lower markups than traditional retailers. Costco operates approximately 900 warehouses globally, with the largest concentration in the United States plus meaningful presence in Canada, Mexico, the UK, Japan, South Korea, Taiwan, Australia, and other markets.

Full COST guide

McDonald's is the world's largest restaurant company by system-wide sales, operating and franchising roughly 43,000 quick-service restaurants across more than 100 countries. The menu centers on burgers, fries, chicken, breakfast, and beverages. The business is fundamentally a franchising and real estate model: about 95% of McDonald's locations are owned and operated by independent franchisees, and the company collects rent and royalties on system sales rather than running most restaurants directly. This asset-light structure produces high margins and steady, recurring cash flow. McDonald's also owns much of the real estate beneath its restaurants, making property income a meaningful and durable revenue stream. Growth levers include digital ordering, delivery partnerships, the loyalty program, value menus, and the CosMc's beverage concept. Founded in 1955 and headquartered in Chicago, McDonald's is one of the most recognizable consumer brands in the world and a long-standing dividend grower.

Full MCD guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• COST drivers: Membership fee growth; International expansion.
• MCD drivers: Franchise and real estate model; Digital, delivery, and loyalty.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Costco's premium valuation (about 48x trailing and 40x forward earnings in October 2026) embeds high expectations for continued same-store sales growth and margin expansion. For MCD, mcDonald's faces traffic pressure when value-seeking consumers cut discretionary spending or perceive fast food as no longer cheap after years of price increases.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick COST if you believe its drivers more; MCD if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the COST and MCD guides.

COST. Costco trades at one of the highest P/E ratios in retail, about 48x trailing earnings in mid-October 2026, on the strength of the durable membership model, consistent same-store sales growth (comparable sales up 11.4% in September), and the long runway for international expansion. The multiple has eased from earlier peaks as earnings grew faster than the share price. Analysts rate it a buy with an average target near $1,066, and the valuation has compressed historically only during severe market drawdowns.

MCD. After a roughly 20% decline in 2026, McDonald's trades near 19.8 times trailing and 17.7 times forward earnings, well below the mid-20s multiple it carried early in the year, while the dividend yield has risen to about 3.2%. The valuation still embeds steady mid-single-digit growth and reliable cash generation, and analysts model about 5.7% EPS growth for 2026. Third-quarter results on November 4, 2026 (consensus EPS about $3.38) are the next read on traffic.

Headline figures (approximate, October 2026): COST shows revenue (fy2026) ~$303 billion, up ~10% YoY; Q4 up ~11% YoY, operating margin ~3.8% (low, by design; membership fees are the profit lever), net income (fy2026) ~$9.2 billion, eps (fy2026) ~$20.76; Q4 $6.75 vs ~$6.53 consensus; MCD shows revenue (ttm) ~$27.7 billion (+3.7% YoY latest quarter; system-wide sales are far larger), operating margin ~46% (high, due to the franchise and royalty model), net income (ttm) ~$8.8 billion, eps (trailing / forward) ~$12.31 / ~$13.76.

COST and MCD are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined COST and MCD exposure against your real portfolio. It is not an investment adviser.