A Netflix Premium plan allows 4 simultaneous streams.
That limit refers to the number of supported devices that can watch Netflix at the same time under one Premium membership. It is separate from the number of devices on which the account can be signed in or the number of profiles the account can contain. A family might have several devices registered, but only four can stream concurrently on the plan.
Premium has traditionally been Netflix’s highest standard subscription tier. Along with four simultaneous screens, it provides access to the service’s highest picture quality, including 4K Ultra HD and, where available, HDR. The exact price and some account-sharing rules vary by country and can change over time, but the four-screen distinction is the plan’s defining concurrency feature.
A common mix-up is confusing simultaneous streams with downloads. Netflix may allow downloads on a different number of supported devices, and that number does not mean those devices can all play at once. Likewise, multiple user profiles personalize recommendations but do not increase the stream allowance. If a fifth person tries to watch simultaneously, the account can reach its device limit even when every user has a separate profile.