Car sharing agreement between friends, family or neighbors, personalized in a few questions
A few questions, and your car sharing agreement is ready to sign, as a PDF. Nothing leaves your device.
What is a car sharing agreement?
It is a written agreement by which the owner of a vehicle opens its use to a private circle of drivers, in exchange for a contribution to the costs actually incurred. It differs from a rental on one decisive point: the owner makes no profit. That is why the document you generate here is titled a cost sharing agreement.
It is not mandatory anywhere, whether in the US, the UK, Ireland or Canada, but it settles in advance the three subjects that most often go sour between people who know each other: the deductible after an accident, how the contribution is calculated, who has priority over the vehicle. An agreement signed by each party is enough, with no notary involved. It never replaces a check with your insurer, though: only your policy says what is covered when someone close to you takes the wheel.
A car sharing agreement between neighbors, within the family or between roommates
The same agreement serves all three situations. Your answers are what set it: who has priority over the vehicle, how the contribution is calculated, what happens when someone leaves the circle.
Between neighbors or friends
Contribution per kilometer or mile, booking with or without approval, deductible borne by the driver at fault, key handover.
Within the family
Often without any contribution, or with a monthly amount shared equally. Minimum age, drivers declared to the insurer, shared logbook.
Between roommates
Security deposit, short notice period, leaving the circle when someone moves out, expenses shared among everyone.
What the generated agreement contains
The document opens with your rules, then runs through its articles. Those that do not apply to you are not printed: without a security deposit or a mediation clause, their articles disappear and the numbering adjusts by itself.
Cost sharing agreement
Between the vehicle owner and the drivers of the circle
Your rules
Your circle charter as checked boxes, at the top of the document.
- 1. Purpose and nature of the agreement
- 2. Parties
- 3. Vehicle
- 4. Insurance and prior verification
- 5. Booking and availability
- 6. Rules for using the vehicle
- 7. Logbook and return
- 8. Cost contribution
- 9. Balance and settlement
- 10. Maintenance, keys and parking
- 11. Damage, accidents and traffic offenses
- 12. Security deposit
- 13. Review, amendment and termination
- 14. Mediation
- 15. Personal data
Then the annexes and each party's signature, with the handwritten words “Read and approved”.
Cost sharing or rental: the distinction that decides everything
Lending a vehicle to people close to you is, by nature, free. As soon as money changes hands, the arrangement can tip over into a rental, with a very concrete consequence: most private auto insurance policies exclude rental use.
What remains cost sharing
- The contribution does not exceed each driver's share of the actual costs.
- The owner makes no margin.
- The circle is private, limited and closed.
- The shared costs are listed and documented.
What tips it over into a rental
- A flat fee unrelated to the vehicle's costs.
- A rate well above the actual cost.
- Making the vehicle available to strangers.
- Advertising what the owner earns from it.
The generated agreement addresses this risk in two places: its Article 1 classifies the arrangement as a not-for-profit cost sharing agreement, and its article on the calculation provides for the rate to be revised downward if it were to exceed the costs actually borne. To know where to set the cursor, our article on the cost per kilometer walks through the official reference figures.
Frequently asked questions
Is this car sharing agreement legally binding?
Yes: a written and signed agreement binds its signatories. The generator produces a generic template that you complete yourself; it is not legal advice and Co-oto is not a party to the agreement. For a leased vehicle, a co-owned vehicle or one used for business, have it reviewed by a lawyer.
Do you really need a written agreement to share your car with people you know?
Nothing requires it. But as soon as the sharing becomes regular or involves more than two people, a written agreement settles in advance the points that cause friction later: the deductible after an accident, how the contribution is calculated, who has priority over the vehicle. One page is enough, and what it protects above all is the relationship.
What is the difference between cost sharing and a rental?
In cost sharing, the driver reimburses a share of the expenses actually incurred and the owner earns nothing. As soon as an amount exceeds the actual costs, the arrangement can be reclassified as a rental, which most private auto insurance policies exclude.
One-off loan or regular sharing: which agreement?
To lend your car once, a simple written note is enough and what really matters is your insurance policy: our insurance guides explain what to check. As soon as the loan repeats, several people drive or a cost contribution comes into play, it becomes regular sharing: that is what the car sharing agreement generated here covers, with the circle rules, the contribution calculation and the logbook.
Does my insurance cover sharing the vehicle?
That depends entirely on your policy, and it is the one essential step before you start. An occasional driver is often covered, a regular driver usually has to be declared, and a novice driver almost always triggers a surcharge or a higher deductible. The agreement requires this check; it does not replace it.
Is the information I enter sent anywhere?
No. Everything happens in your browser: the PDF is built on your device and nothing is sent to Co-oto or to any third party. A draft stays in local storage so you can pick up where you left off, and the “Clear everything and start over” button deletes it.
Ready to set the framework?
Four steps, a few minutes, and you leave with your agreement as a PDF.