A recreational flyer is generally required to register an unmanned aircraft with the FAA when its takeoff weight is

• A.more than 25 pounds, measured on takeoff with all accessories installed.
• B.more than 5 pounds, including the battery and any payload carried on board.
• C.more than 0.55 pound (250 grams).

Why

The general registration threshold is more than 0.55 pound, or 250 grams. Lighter recreational aircraft below that weight are generally exempt from registration, while a 5- or 25-pound threshold does not exist in the rule.

Source: 14 CFR Part 48 · ACS knowledge area: Applicable Regulations · From the Regulations & Registration practice bank (REG-002).

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More Registration Weight Threshold questions

• Under 14 CFR Part 107, a small unmanned aircraft is an unmanned aircraft weighing how much on takeoff, including everything on board or attached?
• You plan to fly a 0.4-pound unmanned aircraft commercially under Part 107. Which statement about registration is correct?
• How much does FAA registration cost for one small unmanned aircraft, and how long is the registration valid?
• Where must the FAA registration number be placed on a small unmanned aircraft?
• During a Part 107 operation, what must the remote pilot in command be able to do with the Certificate of Aircraft Registration?