Sub-250g Drone Rules FAA vs CAA — US and UK Compared

Registration — Same Threshold, Different Systems

Both the FAA and CAA use 250 grams as the key weight threshold for drone registration. In the UK, drones under 250 grams without a camera do not require registration. If the sub-250g drone has a camera, the pilot must obtain a Flyer ID but the drone itself does not need an Operator ID.

In the United States, the FAA exempts drones under 250 grams (0.55 pounds) from registration when flown recreationally under the Exception for Recreational Flyers (Section 44809). However, commercial operators must register all drones regardless of weight under Part 107. The registration fee is $5 for three years.

A critical point for travellers: UK CAA registration has no validity in the United States, and FAA registration has no validity in the UK. If you fly in both countries, you need separate registrations with each authority.

Pilot Qualifications

The UK requires all drone pilots in the Open Category to hold a Flyer ID, regardless of drone weight. This involves passing a free online theory test on the CAA website covering airspace, safety, and privacy. The Flyer ID is valid for five years.

The US system differs by flight purpose. Recreational flyers must pass The Recreational UAS Safety Test (TRUST), a free online knowledge test. Commercial operators must hold a Remote Pilot Certificate under Part 107, which requires passing a proctored knowledge exam at an FAA-approved testing centre and is valid for two years before recurrent testing is needed.

Remote ID Requirements

This is where the two systems diverge most sharply. The FAA requires Remote ID for all drones weighing more than 250 grams. Remote ID broadcasts the drone's identity, location, altitude, and the control station location. Drones without built-in Remote ID capability must use a Remote ID broadcast module. Flying without Remote ID compliance is a federal violation.

The UK CAA currently has no equivalent Remote ID mandate for Open Category operations. The CAA has explored electronic conspicuity concepts and may introduce requirements in future, but as of 2026, sub-250g drone pilots in the UK face no Remote ID obligation.

Altitude and Airspace

Both countries set the maximum altitude for recreational and Open Category operations at 400 feet above ground level (120 metres in the UK). This is one of the few areas of genuine alignment between the two frameworks.

Airspace access differs in structure. The UK uses Flight Restriction Zones (FRZs) around airports and aerodromes, enforced under Article 94A of the ANO 2016. The US uses a more granular airspace classification system (Classes B through G), and the LAANC (Low Altitude Authorization and Notification Capability) system allows pilots to request automated airspace access in controlled zones. The UK has no direct equivalent to LAANC.

Commercial Operations

Commercial drone operations reveal the largest regulatory gap between the two countries. In the UK, sub-250g drones can be used commercially within the Open Category A1 subcategory without additional permissions beyond the standard Flyer ID, provided the pilot follows all Open Category rules including the 120-metre altitude limit.

In the United States, all commercial operations require Part 107 certification regardless of drone weight. This means even a sub-250g drone used for paid photography requires the operator to hold a Remote Pilot Certificate. The Part 107 exam covers airspace, weather, loading and performance, and emergency procedures.

Side-by-Side Comparison

Key Takeaways for UK Pilots

If you are a UK-based pilot considering flying in the United States, or comparing the two systems out of curiosity, the essential differences come down to three areas. First, the US requires Remote ID for heavier drones while the UK does not. Second, commercial operations in the US demand a formal Part 107 certificate, whereas the UK allows commercial use within the Open Category. Third, airspace access in the US benefits from the automated LAANC system, which the UK has not adopted.

Both systems share the fundamental goal of keeping manned aircraft and people on the ground safe. The differences reflect each country's regulatory philosophy and aviation history rather than disagreements about safety priorities.