Amazon, McDonald's, and Costco lead the Brand Loyalty Tracker Q2 2026 rankings for repeat purchase, according to credit-card transaction data analyzed in the report. The common thread is not their rewards programs. It is that each brand has engineered the decision to buy again into near-automatic behavior by controlling access points — membership lock-in at Costco, geographic saturation at McDonald's, and delivery speed at Amazon.
The tracker analyzed actual purchase frequency across card networks, not survey data or claimed intent. The three brands consistently appear in the same customer wallets month after month because they have made the alternative more expensive in time or effort. Costco requires membership to enter. McDonald's places 15,000 locations within the average American's commute radius. Amazon delivers the same day in metro markets and holds Prime subscriptions for 200 million members globally. The mechanism is proximity — physical or temporal — not points accrual.
This matters because it reveals what actually drives repeat purchase at scale. Loyalty programs assume the customer needs an incentive to return. Convenience programs assume the customer will return if you remove the reason not to. The latter wins when the product is frequent, fungible, or habitual. McDonald's does not need to reward a customer for buying lunch. It needs to be the easiest lunch within five minutes of wherever the customer happens to be at noon. Costco does not compete on per-unit price alone. It competes on the sunk-cost bias of the membership fee and the density ofsku per trip. Amazon does not win on assortment. It wins on delivery speed and the embedded default of one-click reorder.
For a small physical-product brand, the play is to copy the mechanism at micro scale. You cannot match Amazon's logistics or McDonald's store count. You can make repeat purchase structurally easier than the alternative. Start with a subscription model that defaults to auto-replenish at the natural consumption interval. If your product is a 30-day consumable, offer a standing order that ships every 28 days with one-click pause. Price it 8% below one-time purchase to cover your reduced acquisition cost and lock the buyer in. If you sell through retail, negotiate end-cap or register placement so the product is in the decision path, not on a shelf that requires a detour. Pay for the placement with margin, not marketing budget. If you run direct, offer a text-based reorder shortcut — the customer texts a single word to a number and the system charges the saved card and ships. No login, no cart, no decision fatigue.
The structural advantage is that this approach converts the second purchase into a non-decision. The customer has to take action to stop buying, not to continue. That reversal is the entire game. Costco's membership fee is a pre-commitment device. Amazon's Subscribe & Save is a default override. Your play is the same: make stopping harder than continuing. Reduce repeat purchase to muscle memory, not consideration. The brand that wins is not the one the customer loves most. It is the one the customer has to think about least.
The next move is to audit your current purchase path and count the friction points between intent and completion. Every login, every size selection, every shipping-address confirmation is a place the customer can leave. Remove one per quarter. Measure repeat rate, not satisfaction scores.