Amazon is quietly nudging the clock forward on deliveries: a new test called Amazon Now is promising to drop everyday groceries and household essentials at your door in roughly 30 minutes or less, starting in parts of Seattle and Philadelphia. The feature is built into the main Amazon shopping app for eligible customers, and the company says it will serve thousands of items that shoppers most often need on short notice.

On a practical level, Amazon Now looks a lot like the familiar app experience with one new priority: speed. Shoppers who are eligible will see a “30-Minute Delivery” option in the app’s navigation bar, can track the order in real time, and — critically for the delivery workforce — can tip drivers through the same interface used for other Amazon orders. The promise is convenience on demand: fresh milk, eggs, produce, over-the-counter medicines, cosmetics, pet food, diapers and even small electronics are all listed as available for the ultrafast window.

There’s a clear price for that convenience. Amazon’s rollout documents and early reporting put the delivery fee for Prime subscribers at $3.99 per order, while non-Prime customers face a much higher $13.99 fee; orders below $15 will also pick up a small-basket surcharge of $1.99. For households who already pay for Prime and who value speed — say, parents scrambling for formula or someone who just ran out of migraine medicine — that arithmetic might make sense. For everyone else, it’s a steep premium.

If you’re wondering how Amazon can get something to your door so fast, the company’s playbook is familiar: smaller, specialized fulfillment facilities located closer to residential areas, plus an army of on-demand drivers. Reporting shows Amazon is leaning on compact “rapid-dispatch” hubs and existing delivery partners — including Flex drivers — who operate under tight departure windows once orders come in. The geography matters: the service is only available in select zones inside the two metro areas for now, which lets Amazon keep delivery distances short and control the inventory mix.

The test fits into a long history of Amazon chasing ever-shorter delivery windows. The company has tried multiple models — Prime Now’s two-hour delivery, a brief standalone “Amazon Today” experiment, investments in tech and logistics over decades — and each iteration has taught Amazon something about demand, cost and operations. What’s different this time is the timing: the push to 30 minutes lands amid fierce competition from Walmart, Instacart, DoorDash and other players that are already promising rapid or near-instant delivery in many markets. Amazon’s move is as much about defending market share in everyday household spending as it is about delighting customers.

There are practical limits. Logistics researchers and industry analysts note that shaving delivery windows down to minutes requires more local inventory, more real estate for micro-fulfillment, and dense delivery labor — all of which raise costs. Even if dozens of neighborhoods can be covered cheaply, scaling that density to whole cities or suburban areas is expensive. That’s one reason Amazon’s initial test is geographically narrow: it lets the company see whether customers will pay the premium and whether drivers and micro-hubs can hit reliable 30-minute targets without breaking the model.

For consumers, the math is simple but situational. The service makes the most sense for people who value time — or truly need something fast — and who already subscribe to Prime, which slices the fee down to a less jaw-dropping number. For Amazon, the test is as much an experiment in price discrimination as it is in speed: lower fees for Prime members help keep churn low while extracting higher one-off revenue from non-subscribers. How many households will make those tradeoffs — especially after holiday shopping patterns settle — will determine whether Amazon Now stays a niche perk or becomes a national expectation.

The bigger picture is that ultrafast delivery reshapes urban logistics. If Amazon can make 30-minute windows reliably profitable, cities will see more compact fulfillment real estate, more short-haul delivery traffic, and a renewed arms race over who owns the last mile. If it can’t, Amazon will likely keep iterating — tightening the zone map, tweaking fees, or folding the best bits of the test into its existing same-day and Prime offerings. Either way, for shoppers in the test cities, the option to have a forgotten ingredient or an urgent household item appear in half an hour will feel a lot like magic — and, for much of the rest of the country, it’s the sort of experiment that signals where commerce might be headed next.

If you want to check whether Amazon Now is an option at your address, open the Amazon app and look for the “30-Minute Delivery” tile in the navigation bar; only eligible customers in the pilot zones will see it for now.