No. You do not need a license to use a CB radio in the United States. The FCC ended individual licensing for the Citizens Band service years ago, and your authority to transmit now comes automatically from following the operating rules in 47 CFR Part 95, Subpart D.1eCFR. 47 CFR 95.305 – Authorization to Operate There is no application to file, no exam to pass, and no fee to pay. What “no license” does not mean is “no rules.” The FCC still controls power, channels, antenna height, and equipment, and it fines people who ignore those limits.
Your Radio Itself Has to Be FCC-Certified
The licensing burden shifted from the operator to the equipment. Every CB transmitter sold in the United States has to be certified by the FCC to operate only on the 40 authorized channels and within the legal power limits.2eCFR. 47 CFR Part 95 Subpart D – CB Radio Service A new radio from a reputable retailer will already carry that certification.
Where people get into trouble is with modified radios or uncertified imports. If a CB has been altered to reach channels outside the authorized band, or to transmit above the legal wattage, it is no longer certified. Using it puts you in the same position as someone transmitting without authorization.
The Rules You Have to Follow
CB’s license-free status comes with a tradeoff: the rules live in the regulations, and the FCC expects you to know them.
Power Output
CB transmitters are capped at 4 watts of mean carrier power on AM or FM voice, and 12 watts of peak envelope power on single sideband.3eCFR. 47 CFR 95.967 – CBRS Transmitter Power Limits These are ceilings, not targets. The low power is part of what lets the service run without licenses in the first place.
Channels
The service uses 40 channels in the 27 MHz band, from 26.965 MHz to 27.405 MHz.4Federal Communications Commission. Citizens Band Radio Service Channel 9 is reserved for emergency traffic and should not be used for casual conversation. Channel 19 is the informal highway channel for road and weather chatter. Everything else is open.
Antenna Height
Vehicle-mounted and handheld antennas have no height restriction. A fixed-station antenna is different. Its highest point cannot exceed 60 feet above the ground, or 20 feet above the tallest point of the structure or tree it is mounted on, whichever is greater.5eCFR. 47 CFR 95.941 – CBRS Antenna Height Limits
The Five-Minute Rule
A single continuous transmission cannot run longer than five minutes. Once you stop, you have to wait at least one minute before starting another conversation on the same channel.6Federal Communications Commission. Personal Radio Services Most CB conversations run far shorter than that, but the limit matters in convoys and group chatter.
What You Cannot Do on CB
The list of prohibited uses in 47 CFR ยง 95.933 is longer than most new operators expect.7eCFR. 47 CFR 95.933 – Prohibited CBRS Uses You cannot transmit false or deceptive messages, obscene or profane language, or advertising for goods, services, or political candidates. Music, whistling, sound effects, and other entertainment content are off-limits. You cannot communicate with stations in other countries, with one exception for General Radio Service stations in Canada. One-way transmissions are generally prohibited, though a call to start a two-way conversation is fine. And you cannot transmit CB communications for broadcast on radio or television, though you can use CB to gather news.
No Linear Amplifiers
External RF power amplifiers, the “linear amps” that boost a CB well past its legal output, are flatly banned for CB use with no exceptions.8eCFR. 47 CFR 95.939 – External Radio Frequency Power Amplifiers Prohibited This is the rule the FCC enforces hardest. If you have an amplifier at your station and there is evidence your signal has been running above the legal limit, the FCC will presume you used it. You do not need to be caught mid-transmission for that to count as a violation.
What It Costs If You Break the Rules
The FCC can impose fines of up to $10,000 per violation on an individual CB operator, up to a maximum of $75,000 for a continuing violation involving a single act or failure to act.9Office of the Law Revision Counsel. 47 USC 503 – Forfeitures If you are transmitting without authorization, meaning modified or uncertified equipment, the consequences can climb further, including seizure of your gear and criminal prosecution.10Federal Communications Commission. FCC CB Radio Enforcement Warning
The Enforcement Bureau investigates CB interference complaints regularly, especially where illegal amplifiers are disrupting nearby electronics or other radio users. A four-figure fine over a cheap amplifier is a poor trade.
If CB Feels Too Limited, Look at GMRS
People who ask about CB licensing are often really asking whether they can get more range or clearer audio elsewhere. Two options are worth knowing about.
The General Mobile Radio Service requires an FCC license but no exam. You apply, pay a $35 fee, and the license lasts ten years.11Federal Communications Commission. Personal Service and Amateur Application Fees It covers your immediate family, including spouse, children, parents, siblings, and in-laws.12eCFR. 47 CFR 95.1705 – GMRS Individual License Required GMRS radios can transmit at up to 50 watts on the main channels, well above CB’s 4-watt cap.13eCFR. 47 CFR 95.1767 – GMRS Transmitting Power Limits GMRS also uses FM, which usually sounds cleaner than CB’s AM.
Amateur (ham) radio requires a written exam administered by volunteer examiners.14Federal Communications Commission. Amateur Radio Service Examinations In exchange for the study time, licensed hams get a much wider range of frequencies, much higher power, and long-distance capability.15Federal Communications Commission. Amateur Radio Service
The Short Version
You can buy a CB, install it, and start talking today, no license needed. Keep the radio unmodified and FCC-certified, stay within the 4-watt and 12-watt limits, respect Channel 9, and leave the linear amplifier out of it. Do that and the FCC will never have a reason to know your name.