Internet Radio vs. FM Radio: What's Actually Different About Running Each?

Plenty of people who search for how to start a radio station picture an FM transmitter and a frequency on the dial, then discover that most newcomers actually launch online. Both are "radio" in the way that matters — a live, programmed audio stream people tune into — but running them is different in almost every practical respect.

How the signal gets to listeners

An FM station modulates a radio wave — encoding your audio into variations in the wave's frequency, as the PBS explainer on AM and FM transmission illustrates — and pushes it out of an antenna. Anyone in range with a receiver gets it, and it costs the station nothing extra whether ten people or ten thousand are listening. The trade-off is geography: your audience ends where your signal does. (We walk the full chain in how a broadcast gets from microphone to speaker.)

An internet station sends one stream to a server, which relays a copy to each listener — the model used by streaming servers like Icecast. There's no range limit at all; someone three time zones away hears you as clearly as your neighbor. The trade-off is that every listener consumes server bandwidth, so a bigger audience means a bigger hosting bill, and everyone needs an internet connection to hear you.

Who's allowed to start one

This is the difference that decides most people's path:

• FM broadcasting is licensed. In the U.S., transmitting on the FM band at meaningful power requires a license from the FCC, and full-power frequencies in populated areas are scarce and expensive. There are limited paths like low-power FM licenses for certain noncommercial organizations, and tiny unlicensed transmitters legal only at ranges too short to serve a real audience — but "I'd like an FM station" is a long institutional process, not a purchase.
• Internet radio has no broadcast license. Nobody allocates streams; you set one up and go live. The gatekeeping that exists is about music rights, not spectrum.

Music licensing works differently too

Both kinds of station need permission to play music, but the systems differ. One difference worth knowing: internet radio in the U.S. involves a digital performance right in the sound recording itself. Webcasters typically operate under the statutory licenses described by the U.S. Copyright Office, with recording royalties collected and distributed by SoundExchange — an obligation that works differently from what terrestrial stations have historically paid. If you stream music, SoundExchange is part of your world. (Licensing details change; treat this as orientation, not legal guidance.)

Cost and effort, honestly compared

• Internet: modest and incremental. A microphone, software, a streaming server or hosted platform, and music licensing if you play music — a budget we break down here. You can be live this month.
• FM: a licensed transmitter, antenna, tower access or siting, engineering, regulatory compliance, and — hardest of all — an available frequency. Even the low-power route is an application process on the FCC's timetable, open only to eligible organizations.

So which is "real" radio?

Both. FM still wins where internet radio can't reach — cars without data, listeners without broadband, emergencies when networks fail — and it carries a legitimacy in local communities that streams are still earning. Internet radio wins on access: no license, no geography, no scarcity, and a global potential audience for a hobbyist's budget. For almost everyone asking "how do I start a radio station?", the honest answer is: start online, learn the craft, and let FM be the ambition rather than the entry fee.