Operating Over People Categories 1-4 Explained (2026) Guide

Operating over people categories 1 through 4 is the framework the FAA created under 14 CFR Part 107 Subpart D to let commercial drone pilots fly in populated areas without getting an individual waiver for every mission. The rule went into effect on April 21, 2021, and it sorts every small unmanned aircraft into one of four risk-based categories based on weight, kinetic energy on impact, and airworthiness certification. Before this rule existed, the only way to legally fly a drone over people for commercial work was to apply for a waiver, which was a long and expensive process that put most missions out of reach.

I have spent the last several months walking pilots through this exact rule on real job sites, and the same question always comes up first: which category does my drone fall into, and what does that actually let me do in the field? In this guide I will break down the difference between each of the operating over people categories 1 through 4, show you the exact weight and kinetic energy thresholds the FAA uses, and help you figure out where your specific aircraft fits in the regulatory framework. By the end you should be able to read your drone’s label, know which category you are operating under, and fly over people with confidence that you are compliant.

What Are the Four Categories of Operations Over People Under Part 107?

The four categories of operations over people are a risk-based system where Categories 1, 2, and 3 limit how much kinetic energy your drone can transfer to a person if it crashes, and Category 4 limits the likelihood of a crash by requiring a full airworthiness certificate. Every commercial drone flight over people in the United States must fall into one of these four categories under 14 CFR 107.39, and the rule applies whether you are flying indoors, outdoors, over a backyard, or over a city street.

Think of it this way: the FAA looked at drone injuries the way an engineer would, using energy and probability. The lighter and slower your drone, the less harm it can do on impact, so it gets fewer restrictions and paperwork. Heavier drones that pack more kinetic energy need stronger safety cases and a Means of Compliance, and the heaviest category shifts the strategy entirely, requiring an airworthiness certificate similar to a manned aircraft.

Here is the high-level difference between the four operating over people categories 1 through 4:

• Category 1: Drones weighing 0.55 pounds (250 grams) or less on takeoff, with no exposed rotating parts that could cause lacerations. No Declaration of Compliance required from the manufacturer.
• Category 2: Drones that transfer no more than 11 foot-pounds of kinetic energy on impact. Requires a Declaration of Compliance and a Means of Compliance on file with the FAA.
• Category 3: Drones that transfer no more than 25 foot-pounds of kinetic energy on impact. Requires a Declaration of Compliance, a Means of Compliance, laceration testing, and operator restrictions like closed-access sites.
• Category 4: Drones that hold an airworthiness certificate issued under 14 CFR Part 21. No weight or kinetic energy limit, but certification is extensive and slow.

You will also hear pilots talk about the operational limitations set forth in Part 107 Subpart D, which covers the airspace rules, visibility requirements, altitude ceilings, and pilot certification that apply no matter which category you fly in. The category system layers on top of those baseline rules, so even a Category 1 drone still has to follow the standard Part 107 operating rules for airspace, line of sight, and registration.

The rule was designed to remove the need for waivers in routine scenarios. The FAA’s hope was that by creating a category framework with predictable thresholds, manufacturers could build compliant aircraft, operators could read a label and know the rules, and the FAA could focus its waiver workload on genuinely unusual missions instead of routine real estate shoots or roof inspections.

Category 1 Operations Over People: The Lightest Drones

Category 1 covers small unmanned aircraft weighing 0.55 pounds (250 grams) or less on takeoff, including everything that is onboard like batteries, payloads, and propeller guards. This is the lightest tier in the operating over people categories 1 through 4 system, and it has the fewest requirements because a drone this small simply cannot cause serious injury to an adult even in a worst-case direct impact.

To operate over people under Category 1, your drone must meet two conditions set out in 14 CFR 107.39(a):

1. The aircraft must weigh 0.55 pounds (250 grams) or less at takeoff, fully loaded with every item that will be in the air during the flight.
2. The aircraft must not have any exposed rotating parts that could cause lacerations to a human being on contact, which means propellers must be enclosed or fully shrouded.

That second point matters more than most people think when they first read the rule. A drone that weighs 240 grams but has open propellers spinning at high RPM is not Category 1, because the props can cut someone even if the total weight is below the threshold. Manufacturers solve this with fully shrouded propeller guards that prevent skin contact with the rotating blades, and that is one of the main reasons tiny consumer drones often meet Category 1 out of the box.

You do not need to submit a Declaration of Compliance as the operator, you do not need to prove any kinetic energy threshold, and you do not need to use a specific test methodology. If your drone meets the weight and shrouding requirements, you are cleared to fly over people as long as you hold a valid Part 107 remote pilot certificate, your drone is registered with the FAA, and your drone broadcasts compliant Remote ID.

Real-world examples in Category 1 include the DJI Mini series, the original DJI Mavic Mini, the Ryze Tello, the Parrot Anafi, and most sub-250-gram toy and prosumer drones on the market today. These are the aircraft I see most often on residential job sites, real estate shoots, and small commercial mapping projects, and they give operators the most operational freedom of any category in the framework.

Category 1 also has the advantage of working seamlessly with the standard Part 107 rules for night operations, moving vehicles, and open-air assemblies. You can fly over people at night as long as you have the required anti-collision lighting, and you can fly over moving vehicles in any area without restriction, because the kinetic energy is so low that the FAA considers the residual risk acceptable.

Category 2 Operations Over People: 11 Foot-Pounds Kinetic Energy

Category 2 covers small unmanned aircraft that can transfer no more than 11 foot-pounds (roughly 15 joules) of kinetic energy to a person during a sustained flight operation. Kinetic energy is the measurement the FAA cares about most for the middle tiers, and it captures the actual blunt-force risk better than weight alone because it accounts for both the mass of the aircraft and its velocity at impact.

The formula the FAA recognizes is kinetic energy equals one-half the mass of the aircraft times the velocity squared, but most pilots never calculate it by hand. Manufacturers run a Worst-Case Typical Failure (WCTF) test, which assumes the drone loses power mid-flight and free-falls from a representative altitude, then proves the resulting impact energy stays under the threshold for its category. The test also has to account for the aircraft in its most damaging configuration, which typically means considering the worst-case orientation and the densest payload configuration.

To qualify for Category 2, a manufacturer must complete three steps before the drone can be sold or operated over people in this category:

1. Demonstrate a Means of Compliance (MOC) showing how the aircraft meets the 11 ft-lb kinetic energy limit. The MOC is the technical file that explains the design, testing, and analysis used to prove the threshold.
2. Submit a Declaration of Compliance (DOC) to the FAA confirming the aircraft meets the requirements of 14 CFR 107.39(b). The DOC ties the aircraft to its MOC and puts the manufacturer on the hook for ongoing compliance.
3. Label the aircraft with the category or categories of operation over human beings it is qualified to conduct. The label has to be legible, in English, and permanently affixed to the drone.

As of 2026, no consumer or prosumer drone on the U.S. market has an active Category 2 Declaration of Compliance listed with the FAA. That is one of the most common points of confusion I run into when talking to new commercial pilots. People assume their Mavic 2, Autel Evo, or Skydio drone counts as Category 2, but those aircraft are technically Category 1 only if they fall under 0.55 pounds, or they fall outside the rule entirely and require a waiver for operations over people.

If you are flying a drone that weighs more than 250 grams and is not airworthiness-certified, you are either operating under a waiver for operations over people, you are operating in a category the drone is not actually qualified for, or you are simply not compliant. There is no in-between for the operating over people categories 1 through 4 system, and getting caught operating over people without meeting one of the four categories can result in FAA enforcement action, including remote pilot certificate suspension and civil penalties.

The empty Category 2 market is one of the strange outcomes of the 2021 rule. Manufacturers have largely skipped straight to Category 1 with their sub-250-gram products and Category 3 with their enterprise products, leaving the middle band of the framework with very few real-world options. Pilots who need the slightly higher payload of a Category 2 drone typically either step up to a Category 3 aircraft or apply for a waiver.

Category 3 Operations Over People: 25 Foot-Pounds Kinetic Energy

Category 3 permits small unmanned aircraft that can transfer up to 25 foot-pounds (about 34 joules) of kinetic energy on impact. This is the highest kinetic energy tier in the routine operating over people categories 1 through 4 framework, and it lets you fly larger commercial drones like the DJI Mavic 3 Enterprise, the Autel Evo II Enterprise, and the senseFly eBee X over people, but with operational strings attached.

To qualify for Category 3, the manufacturer must complete four compliance steps under 14 CFR 107.39(c):

1. Demonstrate a Means of Compliance (MOC) proving the 25 ft-lb kinetic energy threshold. The MOC has to address not just the energy calculation but also the test methodology used to derive it.
2. Conduct and pass a laceration test showing the aircraft will not cause serious injury from its rotating parts. This test typically involves dropping or swinging the aircraft at a synthetic skin target and measuring the cut depth.
3. Submit a Declaration of Compliance (DOC) to the FAA that references the MOC and confirms the aircraft meets all Category 3 requirements.
4. Label the aircraft with the qualified category or categories so operators know what they can legally do with the drone.

Once you are flying a Category 3 drone, the operating rules get tighter than they are in Categories 1 or 2. You can only operate over people in two specific scenarios under 107.145 and 107.39(c):

• The operation takes place over a closed-access site, where the drone operator has taken reasonable steps to keep non-participants out of the overflight area, or
• The drone does not maintain sustained flight over open-air assemblies of human beings, meaning you can transit across a crowd but cannot hover or circle above the same people.

Open-air assemblies are gatherings of people in places like parks, beaches, parades, sporting events, and festivals where the public can move freely in and out. Sustained flight means operating over the same people for the duration of their assembly, not simply transiting across an area where people happen to be standing. The FAA made this distinction because transiting over a crowd on the way to a job site is fundamentally different from hovering above the crowd for a video shoot.

Most real-world Category 3 operations I see are infrastructure inspections at controlled industrial sites, surveying on private ranches, and mapping work over job sites that have been barricaded from the public. The closed-access site requirement is doing the heavy lifting in those scenarios, because it shifts the responsibility for keeping non-participants out to the operator rather than the manufacturer or the FAA.

For moving vehicle operations under Category 3, the rule says you can operate over moving vehicles only in areas that are not congested. A congested area is one where you could reasonably expect vehicles to be slowed or stopped because of the density of traffic, which generally means you want to stay off major highways during rush hour. Rural roads, suburban arterials at off-peak times, and most industrial access roads are all fair game for Category 3 over-vehicle operations.

Category 4 Operations Over People: Airworthiness Certification

Category 4 is the heavy hitter of the operating over people categories 1 through 4 system, and it works completely differently from the first three. Instead of limiting kinetic energy, Category 4 limits the likelihood of an accident by requiring the drone to hold an airworthiness certificate issued under 14 CFR Part 21, which is the same regulatory part that governs manned aircraft type certification in the United States.

To fly in Category 4, the small unmanned aircraft must have one of the following certifications:

1. A type certificate issued under 14 CFR 21.41, which is the standard airworthiness certificate used for production aircraft and involves a full design, manufacturing, and quality system review, or
2. A special airworthiness certificate issued for the purpose of conducting operations over people under 14 CFR 21.183, which is a more limited certification tailored to a specific drone and specific operational scope.

There is no weight limit and no kinetic energy threshold in Category 4, which is why most package delivery drones and large commercial UAS in the U.S. are designed around this category. The logic is straightforward: a fully type-certified drone goes through the same rigorous airworthiness process as a Cessna 172, so the FAA is comfortable letting it operate in populated areas regardless of how heavy it is or how much kinetic energy it carries.

The catch is that Part 21 airworthiness certification is expensive, slow, and technically demanding. The applicant has to prove the design, manufacturing process, quality system, and ongoing maintenance program meet FAA standards, and only a handful of drones have made it through to a usable certificate. The major Category 4 programs right now are in the package delivery space, with companies like Wing, Zipline, Amazon Prime Air, and Matternet all running certified aircraft in limited U.S. operations under specific operational approvals.

For most commercial Part 107 pilots reading this, Category 4 is not something you will pursue yourself. It is the framework that lets large fleet operators and manufacturers certify their aircraft for delivery, public safety, large-scale surveying, and other missions that would never be safe under a kinetic energy limit. If you are flying off the shelf at a job site, you are almost certainly in Categories 1 through 3, not Category 4.

What Category 4 does affect you indirectly is the broader FAA acceptance of autonomous and beyond visual line of sight operations. The same regulatory mindset that produced Part 21 certification for delivery drones is also pushing the FAA toward enabling routine BVLOS for smaller drones under Part 108, which is a rulemaking that is currently in progress as of 2026.

Quick Comparison: All Four Operating Over People Categories at a Glance

Here is a side-by-side view of the four operating over people categories 1 through 4. Use this when you are picking the right category for your aircraft or planning a mission in a populated area. The thresholds and documentation requirements are the exact language from 14 CFR 107.39, simplified for quick reference.

Category 1 at a Glance

Category 1 is the lightest tier with a 0.55-pound takeoff weight cap, no exposed rotating parts, and no Declaration of Compliance required. It is the easiest category to enter, has no kinetic energy limit, and covers most sub-250-gram drones on the market like the DJI Mini series. You can operate over moving vehicles in any area and over open-air assemblies without restriction as long as you do not maintain sustained flight over the assembly.

Category 2 at a Glance

Category 2 requires the drone to stay under 11 foot-pounds of kinetic energy, with a Means of Compliance and a Declaration of Compliance on file with the FAA. As of 2026, no widely available drone is Category 2 certified in the United States, which is why most pilots skip this tier entirely. The label must identify the drone as Category 2 qualified, and the operator follows the same moving vehicle and night rules as Category 1.

Category 3 at a Glance

Category 3 allows up to 25 foot-pounds of kinetic energy, plus passing laceration testing, a Declaration of Compliance, and either a closed-access site or no sustained flight over open-air assemblies. This is the tier where most enterprise drones like the Mavic 3 Enterprise land. Moving vehicle operations are limited to non-congested areas, and the label must reflect the Category 3 qualification.

Category 4 at a Glance

Category 4 requires an airworthiness certificate issued under 14 CFR Part 21, with no weight or kinetic energy cap. It is reserved for fully certified aircraft like delivery and public safety drones operated by companies like Wing and Zipline. Operators in Category 4 do not face the same moving vehicle, open-air assembly, or sustained flight restrictions because the airworthiness case covers those risks at the design level.

Operations Over Moving Vehicles and Night Operations by Category

The four operating over people categories 1 through 4 also control where and when you can fly over moving vehicles under 14 CFR 107.145. The rule was updated alongside the operations over people rule on April 21, 2021, and the two work together when you are planning real-world missions over roads, highways, parking lots, and rail corridors.

Category 1 drones can operate over moving vehicles in any area, with no restrictions on the type of road or the speed of traffic, because the kinetic energy is so low that even a direct collision is unlikely to cause serious injury. This is one of the biggest practical advantages of flying a sub-250-gram drone for real estate, mapping, and inspection work in urban environments.

Categories 2 and 3 can operate over moving vehicles, but only in areas that are not congested, and the drone must not maintain sustained flight over the vehicles. The FAA defines a congested area as one where you could reasonably expect ground vehicles to slow or stop because of traffic density, which generally means you want to avoid rush-hour highways and busy downtown grids.

Category 4 aircraft with an airworthiness certificate have no moving vehicle restrictions under Part 107, since the airworthiness case already covers the risk profile. If you are flying a Part 21 certified drone, you can fly over congested highways during rush hour, which is one of the reasons package delivery companies need Category 4 certification to operate in dense urban areas.

For night operations under 14 CFR 107.29, all four categories follow the same baseline rules. You need anti-collision lighting visible for 3 statute miles with a flash rate of 100 to 400 flashes per minute, the lighting must be on for the entire night flight, and you must complete an updated recurrent training or initial training that covers night operations if you have not done so within the last 24 calendar months.

The category does not change the night lighting requirement, but it does change the operational envelope. A Category 1 drone at night over a residential street is a very different mission from a Category 4 aircraft at night over a populated delivery zone, and you should plan your preflight checks, briefing, and contingency procedures to match the category you are flying in. Night flights over people also require you to brief non-participants whenever possible, because the visual references people use to see and avoid a drone are reduced at night.

Remote ID and Other Requirements for Every Category

Every drone operating in any of the four operating over people categories 1 through 4 must comply with the Remote ID rule under 14 CFR Part 89. There is no exception for lighter categories, and flying without compliant Remote ID is treated the same as flying without a category in the FAA’s enforcement playbook. Remote ID lets the FAA, law enforcement, and other airspace users identify your drone in flight, which is critical when you are flying over people and need to be able to attribute a flight to a specific operator.

You will also need the following baseline requirements for any category:

• A valid Part 107 remote pilot certificate, or being under the direct supervision of a Part 107 certified remote pilot in command.
• A current FAA registration for your drone, with the registration marked on the exterior of the aircraft.
• Visual line of sight or a valid waiver for beyond visual line of sight (BVLOS) operations.
• An aircraft label that correctly identifies the category or categories of operation it is qualified to conduct under 14 CFR Part 107.

The label requirement catches a lot of pilots off guard when they first encounter it. The label has to be in English, legible, and it must list which category the drone qualifies for. If you buy a drone that is declared as Category 1, the label will say Category 1, and that is the only category you can legally use it in over people without a waiver. If you buy a Category 3 drone, the label will say Category 3, and you must follow the Category 3 operational restrictions even if you wanted to operate it as a heavier Category 1 drone instead.

Remote ID has its own compliance deadline and equipment requirements. As of 2026, all drones required to be registered with the FAA must also broadcast compliant Remote ID, either through built-in equipment (Standard Remote ID) or through a broadcast module attached to the aircraft (Broadcast Module Remote ID). If you are flying a drone that does not have either capability, you are limited to the FAA-Recognized Identification Area (FRIA) system, which restricts you to designated flying fields.

Key Definitions You Need to Know

These terms come up constantly when you are reading the operating over people categories 1 through 4 rule text, and they are the source of most of the confusion I see in pilot communities and online forums. Bookmark this section for quick reference when you are reviewing a mission plan or talking to a client about what is and is not legal over their property.

Sustained flight means operating over the same human being for more than a brief moment, and it does not include incidental or transitory overflight where the drone passes quickly over a person as part of a larger route. The FAA has not given a hard time threshold, but the consensus in the industry is that anything longer than a few seconds of hovering or circling over the same people counts as sustained.

Open-air assembly refers to a gathering of people in an open area where movement is not restricted, including concerts, parades, sporting events, and busy public spaces like beaches and parks. A backyard barbecue with a guest list is generally not an open-air assembly, but a Fourth of July fireworks show with the general public attending is.

Closed-access site means a location where the operator has reasonable control over who enters, such as a fenced industrial site, a controlled construction zone, or a private property with restricted access and visible signage. The FAA does not require a fence, but you do need to be able to demonstrate that you took reasonable steps to keep non-participants out of the overflight area.

Non-participant is any person who is not directly involved in the drone operation. The pilot, the visual observer, the client who hired you, and people the operator has briefed and consented to be over are participants, and everyone else is a non-participant. This definition matters because the entire operating over people framework is built around protecting non-participants, who have not agreed to be in the drone’s flight path.

Kinetic energy is the energy a moving object transfers on impact, calculated as one-half the mass times the velocity squared. The FAA uses the velocity at the moment of impact, assuming a worst-case typical failure like a motor or battery cutout. This is why the kinetic energy numbers in Categories 2 and 3 (11 ft-lbs and 25 ft-lbs) are the headline thresholds rather than the weight of the drone, because they capture the actual harm potential.

Means of Compliance (MOC) is the technical file a manufacturer builds to show the FAA how the drone meets the category requirements. It typically includes design drawings, test results, analysis reports, and quality control procedures.

Declaration of Compliance (DOC) is the formal submission to the FAA that ties the aircraft to its MOC. Once a manufacturer files a DOC, the aircraft can be labeled with the qualified category and sold for operations over people in that category.

FAQ’s

Final Thoughts on Operating Over People Categories 1 Through 4

The biggest difference between the four operating over people categories 1 through 4 is how the FAA manages risk, and the answer to that is energy versus probability. Categories 1, 2, and 3 are all about reducing the energy your drone can transfer to a person if something goes wrong, which is why the weight and kinetic energy thresholds become the headline numbers as you move from Category 1 to Category 3. Category 4 flips the script and manages risk by reducing the probability of a crash, using a Part 21 airworthiness certificate to ensure the aircraft is built, maintained, and operated to manned aviation standards.

If you are flying a sub-250-gram prosumer drone for real estate, mapping, or inspections, you are most likely in Category 1 and you have the most operational freedom of any tier. If you are flying a larger enterprise drone like the Mavic 3 Enterprise, you are most likely operating under a Category 3 framework at a closed-access site, or under a Part 107 waiver if your mission does not fit the closed-access or non-sustained-flight patterns. If you are flying a fully certified delivery drone for a company like Wing or Zipline, you are operating in Category 4 under Part 21 and you have a very different rulebook to follow.

My recommendation is to check your drone’s label before every mission, confirm your Remote ID is broadcasting correctly, and document the category you are flying under in your preflight checklist. The FAA is paying close attention to operations over people enforcement, and the easiest way to stay compliant is to know which of the four operating over people categories 1 through 4 your drone qualifies for and stick to the matching operational limits every time you fly.

As you grow your commercial drone business, you will eventually want to fly missions that exceed your current category, and that is when you should look into either upgrading your aircraft to one with a higher category Declaration of Compliance or applying for a Part 107 waiver through the FAA’s DroneZone portal. Both paths are real and well-traveled, and the operating over people categories 1 through 4 framework is the roadmap that tells you which one is the right next step for your operation.