Online Grocery Keeps Growing: What the Trend Means for Sellers

Buying groceries online used to be a niche habit. It isn't anymore. A meaningful and growing share of shoppers now order at least some of their food, beverages, and household consumables online instead of pushing a cart through a store — and that behavior, once formed, tends to stick. For marketplace sellers, the steady growth of online grocery and consumables is one of the more durable demand trends out there. But 'growing category' and 'good category for you to enter' are not the same sentence, and consumables come with their own brutal economics. Here's how to read the trend without getting burned by it.

Why the shift is sticky, not a fad

The move toward online grocery isn't driven by novelty — it's driven by convenience and habit, which are far harder to reverse. Once a household sets up a recurring order for the coffee, snacks, vitamins, and cleaning supplies it buys on autopilot anyway, the friction of switching back to in-store is rarely worth it. That's the key for sellers: consumables are repeat purchases. A shopper who liked your product doesn't buy it once — they buy it again every few weeks. Demand in this space compounds in a way it never does for one-time purchases, which is exactly why it keeps growing and why it's attractive despite thin margins.

Where the growth actually shows up

The trend isn't evenly distributed. The corners of the grocery and consumables world that move best online tend to share a few traits — and these are the pockets worth studying before you commit:

• Shelf-stable pantry staples — coffee, snacks, condiments, and dry goods that ship and store easily and don't spoil.
• Health and wellness consumables — supplements, protein, and functional foods, where shoppers research and reorder online comfortably.
• Household and cleaning supplies — bulky, boring, repeat-buy items people would rather have delivered than haul home.
• Specialty and hard-to-find foods — dietary, ethnic, or niche products that local stores don't stock, where online is the only convenient option.
• Subscribe-style repeat buys — anything a household runs out of on a predictable cycle and is glad to automate.

The economics are unforgiving — respect them

Here's the catch that sinks newcomers: grocery and consumables are often low-priced and physically heavy or bulky, which is the worst combination for fulfillment costs. A box of pantry staples might sell for a modest price while weighing several pounds, and the fulfillment fee on weight alone can swallow most of the margin. Add the referral fee (typically in the mid-teens percent), your cost of goods, and the reality that you may need a competitive price to win the sale, and a lot of grocery SKUs net almost nothing per unit. The category grows on volume and repeat orders, not on fat per-unit margins. Before you chase the trend, run the full per-unit profit math with realistic shipping weight — because in consumables, the difference between a profitable SKU and a money-loser is often a single dollar.

Walmart's grocery strength is a real opening

If grocery and consumables interest you, Walmart deserves a hard look. Grocery is core to Walmart's identity in a way it isn't quite for any other marketplace, and shoppers arrive there already in a stock-up, household-essentials mindset. That intent matters: a consumable listed where people are already filling a virtual cart with food and supplies tends to convert better than the same product fighting for attention in a more general marketplace. Selling the same consumable on both Amazon and Walmart lets you meet that grocery-minded shopper where they already are while keeping the broader marketplace reach too — but only do it after you've confirmed the unit economics hold up on each channel's fee structure, because they won't always be identical.

Frequently asked questions

Is online grocery too crowded for a smaller seller to enter?

It's competitive, but the repeat-purchase nature of consumables means a product that wins a household tends to keep it. Smaller sellers usually do better in specific, defensible niches — specialty diets, hard-to-find items, bundles — than in head-to-head commodity staples where the lowest price wins and margins evaporate.

Why do my consumable SKUs barely make money despite selling well?

Almost always weight-based fulfillment cost. Low price plus heavy or bulky packaging is the margin-killer of this category. Re-run the per-unit math with the real shipping weight and the full fee stack — you'll often find the answer is to raise price, cut packaging weight, or sell in larger multi-packs where the economics improve.