FAR sixty-one point one thirteen and the cost-sharing trap for private pilots

FAR 61.113 allows private pilots to split flight costs with passengers, but only if the flight passes three specific tests: common purpose, no holding out, and pro rata share. Misreading these provisions can turn a friendly fuel-split into an illegal charter operation, with consequences up to and including certificate revocation by the FAA.

What Does FAR 61.113 Actually Say?

The regulation establishes the foundation of private pilot privileges with two clear prohibitions. A private pilot cannot act as pilot in command of an aircraft carrying passengers or property for compensation or hire, and a private pilot cannot, for compensation or hire, act as pilot in command of an aircraft.

The cost-sharing exception then carves out a narrow allowance: a private pilot may not pay less than the pro rata share of the operating expenses of a flight with passengers, provided those expenses involve only fuel, oil, airport expenditures, or rental fees.

The trap is in the second sentence. Pilots read “I can split costs” and stop there. The FAA reads the same words and asks whether you’re really splitting expenses or running an informal charter.

What Is the Common Purpose Test?

You and your passengers must have a genuine shared reason for the flight. You cannot be flying passengers purely because they want to go somewhere. You must also have an independent reason to be at that destination yourself.

A legal example: you decide to fly to a pancake breakfast at an airport an hour away, and friends ask to come along. You all share the destination and purpose.

An illegal example: a friend asks you to fly them to visit their grandmother in the next state. You don’t know grandma. You have no reason to be there. You’re going only because they asked. That fails common purpose and starts to look like a charter flight.

The FAA examines who initiated the flight and why. If the passenger is driving the decision of when and where to go, you’re in dangerous territory.

What Counts as “Holding Out”?

Holding out means offering your services to the public at large. Posting on social media that you have two open seats to Denver this weekend? Holding out. Putting flyers up at a university offering rides for fuel money? Holding out.

The regulation exists specifically to prevent private pilots from running unlicensed air taxi operations. The moment you signal to the general public that your services are available, you’ve crossed the line, even if nobody takes you up on it.

Telling specific friends and family that you’re flying somewhere and they’re welcome to chip in is generally fine. The test is whether you’re reaching out to people with an existing personal relationship or advertising to strangers.

This is why Flytenow, the “Uber for airplanes” startup, was shut down. The FAA ruled that posting flights to a public platform constituted holding out, regardless of whether pilots only collected fuel money. The court agreed and the company folded.

The practical line: posting to a private group of flying club buddies is probably fine. Posting to a public page with thousands of followers is not.

How Does the Pro Rata Share Rule Work?

The cost of the flight must be divided equally among everyone on board, including the pilot. If the flight costs $200 in direct operating expenses and four people are on board, each person pays $50, including you.

The pilot cannot pay less than their share. If passengers cover the pilot’s portion, that portion becomes compensation for piloting, and a private pilot cannot accept compensation to fly.

Only specific costs qualify:

• Fuel
• Oil
• Airport expenditures (landing fees, tie-downs)
• Aircraft rental fees

You cannot include your time, hourly maintenance reserves, or even a coffee from the FBO. Only the direct operating costs listed in the regulation.

A Legal Cost-Sharing Scenario

You own a Cessna 172. You and three friends fly two hours to a football game. Fuel costs $180, landing fees add $20. Total: $200.

• Common purpose? Yes. You all want to see the game.
• Holding out? No. Three personal friends, invited individually.
• Pro rata? $200 divided by four equals $50 per person, including you.

You’re clear under 61.113.

Now change one thing. Your friends offer to cover the entire $200 because you’re doing the flying. Stop. That makes you a paid pilot. Violation.

Change another thing. You don’t actually care about the game; you’ve never watched football. Common purpose weakens. The FAA could conclude the flight exists solely to transport your passengers, which is a charter operation requiring a commercial certificate.

What About Flying for Your Boss?

Your boss asks you to fly her to a client meeting in the next state and offers to pay your time plus expenses. Every element of this is wrong: you’re paid for your time, you’re flying for her purposes, and you have no shared reason to be there.

If she only offers to cover fuel? Still a violation. There’s no common purpose. The pro rata rule cannot save a flight that has no shared purpose to begin with.

The legal options: she hires a charter operator with a Part 135 certificate, or you obtain the appropriate commercial credentials.

The Compensation Definition Is Broader Than You Think

Compensation does not have to be money. The FAA’s definition includes the accumulation of flight time, goodwill, business advantage, reciprocal favors, and anything else of value.

The Mangiamele interpretation letter from 2014 made this explicit. A pilot asked whether his employer could reimburse fuel for flights to business meetings, where flying was not his primary job duty. The FAA Chief Counsel ruled that fuel reimbursement is compensation, and receiving compensation to fly converts the flight into a commercial operation requiring a commercial certificate, unless it falls within a specific exception.

FAR 61.113(b) provides one such exception: a private pilot may fly in connection with a business or employment if the flight is only incidental to that business and the aircraft does not carry passengers or property for compensation or hire. “Incidental” is the operative word. If flying is the core function of your job, you need a commercial certificate.

How Should I Document Cost-Sharing Flights?

Keep a simple log for any flight where passengers contribute. Record:

• Date
• People on board
• Destination
• Total operating cost
• Amount each person paid (including yourself)

If a question ever arises, documentation is your defense.

Why Does This Rule Exist?

Commercial aviation operates under safety standards that private operations don’t: higher pilot training requirements, drug and alcohol programs, maintenance oversight, and duty time limits. When passengers pay for transportation, they have a right to expect that level of oversight.

The cost-sharing provision is the FAA’s compromise. It lets private pilots genuinely share expenses with people they know while protecting the flying public from untrained operators running informal taxi services.

Key Takeaways

• FAR 61.113 cost-sharing requires three things: common purpose, no holding out to the public, and pro rata cost division including the pilot’s share.
• The pilot must always pay at least an equal share of fuel, oil, airport fees, and rental costs. Anything less counts as compensation.
• Holding out includes social media posts to public platforms. Flytenow was shut down precisely for this reason.
• Compensation includes more than cash: flight time, goodwill, business advantage, and fuel reimbursement all count under the Mangiamele interpretation.
• When in doubt, pay for the whole flight yourself. A tank of fuel is not worth your certificate.