Table of Contents

Boat Co-Ownership Agreement: What to Include

A boat co-ownership agreement should include clauses covering ownership structure and percentages, financial contributions and ongoing cost allocation, scheduling and access rights, maintenance standards and responsibilities, insurance requirements, rules of use, exit and buyout provisions, and a dispute resolution process. Every clause should be specific enough to prevent ambiguity while flexible enough to accommodate reasonable changes in circumstances.

This guide walks through each section that a comprehensive co-ownership agreement should contain. While it is not a substitute for legal advice, it provides a practical checklist to ensure nothing important is overlooked when you and your partners draft your agreement.

What Should the Preamble and Definitions Cover?

The opening section of the agreement should establish the foundation:

Parties: Full legal names, addresses, and contact details of all co-owners. If any party is a company or trust, include the entity details and the authorised representative.

Vessel description: Make, model, year of manufacture, hull identification number, engine make and serial number, registration number, and current mooring location. Include enough detail to identify the vessel unambiguously.

Effective date: When the agreement comes into force.

Definitions: Define key terms used throughout the agreement, such as "maintenance," "peak period," "emergency repair," "fair market value," and "booking period." Clear definitions prevent arguments about what a term means when it matters.

Recitals: A brief statement of the parties' intention, such as "The parties wish to co-own and share use of the Vessel on the terms set out in this agreement."

How Should Ownership Be Documented?

Ownership percentages: State each partner's ownership share precisely (for example, "Partner A: 33.33%, Partner B: 33.33%, Partner C: 33.34%").

Ownership structure: Specify whether the vessel is held as tenants in common (most common), joint tenants, through a partnership, or through a company. This affects legal rights, tax, and succession. Our detailed guide to boat share agreements explains the implications of each structure.

Title and registration: State how the vessel is registered and in whose name. Confirm that registration in one party's name does not affect beneficial ownership proportions.

Initial contributions: Document each partner's financial contribution to the purchase, including deposit, balance, stamp duty, survey fees, legal fees, and any initial fit-out costs.

What Financial Terms Are Essential?

Ongoing Cost Allocation

List every category of ongoing cost and specify how each is allocated:

• Marina berth or mooring fees: proportional to ownership
• Insurance: proportional to ownership
• Routine maintenance and servicing: proportional to ownership
• Unscheduled repairs: proportional to ownership (with fault-based exceptions)
• Fuel: per-use or proportional (specify which)
• Cleaning: proportional to ownership
• Registration and licensing: proportional to ownership
• Administration or management fees: proportional to ownership

Payment Terms

• Contribution amount and frequency (monthly direct debit is typical)
• Due date for each payment
• Bank account details for the shared fund
• Who manages the account and provides statements
• Late payment consequences: grace period (for example, 7 days), interest on overdue amounts (for example, RBA cash rate plus 4%), suspension of access after a defined period of non-payment

Spending Authority

Define thresholds clearly:

• Under $500: any single partner can authorise
• $500 to $2,000: requires agreement of two partners
• Over $2,000: requires majority or unanimous agreement
• Emergency safety repairs: any partner, any amount, immediate authorisation

Maintenance Fund

• Monthly contribution per partner
• Target fund balance (for example, $5,000 to $10,000)
• Process for additional contributions if the fund is depleted
• Process for reducing contributions if the fund exceeds the target
• Treatment of fund balance when a partner exits

What Scheduling Clauses Are Needed?

Primary scheduling method: Fixed rotation, booking system, or hybrid. Document the specific rules for each.

Peak period allocation: How high-demand dates (summer weekends, public holidays, school holidays, Christmas/New Year) are distributed. Rotation of priority from year to year is the fairest approach.

Booking rules: If using a booking system, specify: - Maximum advance booking period (for example, 4 weeks) - Maximum consecutive days per booking - Number of bookings per partner per period - Cancellation notice requirements (for example, 48 hours) - What happens to cancelled bookings

Extended use: Rules for multi-day trips, including advance notice, impact on other partners' allocations, and any additional cost contributions.

Guest access: Whether guests can use the boat without the booking partner present, and any limitations on guest numbers or identity.

For practical guidance on making scheduling work, see our article on boat share scheduling and availability.

What Maintenance Provisions Should Be Included?

Maintenance schedule: Reference or attach a maintenance schedule covering engine servicing intervals, annual haul-out, safety equipment checks, and other regular maintenance items.

Professional servicing: Specify that mechanical, electrical, and structural maintenance must be performed by qualified professionals. Define any exceptions (for example, partners may handle basic cleaning).

Post-use checklist: Include or reference a checklist that each partner must complete after using the boat (washdown, cleaning, refuelling, damage inspection, log entry).

Damage reporting: Require immediate reporting of any damage, malfunction, or incident. Specify the reporting method (for example, message to the group chat plus a written note in the boat's log).

Upgrade decisions: Specify that upgrades (as distinct from maintenance) require unanimous consent and define who pays. If one partner wants an upgrade others do not, that partner should fund the difference.

What Insurance Clauses Are Necessary?

Minimum coverage: Specify minimum requirements for hull insurance, third-party liability (recommend $10 million minimum for Sydney Harbour use), and any other required coverage.

Named parties: All co-owners must be named on the policy as insured parties and disclosed as operators.

Disclosure obligations: Each partner must make full disclosure to the insurer of any relevant information, including claims history, incidents, medical conditions, and licence status.

Excess responsibility: Define who pays the excess in different scenarios (at-fault damage, no-fault damage, shared fund contribution).

Policy management: Specify who is responsible for arranging and renewing the policy, and require evidence of current coverage to be shared with all partners annually.

For more on insurance considerations, see our guide to boat share insurance in Australia.

What Rules of Use Should Be Documented?

Operating area: Define the geographic area where the boat may be used (for example, Sydney Harbour, Pittwater, coastal waters within 20 nautical miles of Sydney Heads).

Licensing requirements: All operators must hold a current boat driving licence appropriate for the vessel.

Weather limitations: Define conditions under which the boat should not be operated (for example, Bureau of Meteorology small craft warning or above).

Passenger limits: Maximum number of passengers aboard at any time, consistent with the vessel's safety certificate.

Alcohol and drugs: Specify compliance with NSW maritime laws regarding alcohol consumption while operating a vessel. Consider additional restrictions if partners agree.

Pets: Whether animals are permitted aboard.

Smoking: Whether smoking is permitted on the vessel.

Sub-letting or commercial use: Prohibit commercial use or sub-letting unless specifically agreed by all partners.

What Exit and Buyout Provisions Are Needed?

Voluntary exit: Notice period (three to six months), valuation method, right of first refusal for remaining partners, timeline for exercising that right, process for external sale if partners decline to purchase.

Involuntary exit: Circumstances under which a partner may be removed (persistent non-payment, breach of agreement, actions voiding insurance), the process required (notice, opportunity to remedy, vote), and the terms of departure.

Death or incapacity: Whether the share passes to the estate or whether remaining partners have an option to purchase, the process and timeline for resolution, and any life insurance requirements.

Forced sale: Trigger conditions (for example, no buyer found within 12 months, majority vote), the sale process, and distribution of proceeds.

Valuation method: Independent survey, average of multiple valuations, or agreed depreciation formula. Specify who pays for the valuation.

Our guide on how to exit a boat share explores these provisions in more practical detail.

What Dispute Resolution Process Should Be Included?

Step 1 - Direct discussion: Partners must first attempt to resolve disputes through direct conversation within a specified timeframe (for example, 14 days).

Step 2 - Mediation: If direct discussion fails, the dispute must be referred to a qualified mediator. Specify how the mediator is selected (for example, appointed by the Resolution Institute or agreed by the parties) and how mediation costs are shared.

Step 3 - Arbitration or litigation: If mediation fails, specify whether disputes are resolved by binding arbitration or through the courts. Arbitration is typically faster and less expensive.

Governing law: The agreement is governed by the laws of New South Wales (or the relevant state).

Costs: Each party bears their own costs for dispute resolution unless a tribunal or court orders otherwise.

Should You Use a Template or Get a Custom Agreement?

Templates provide a useful starting point, but every boat share has unique circumstances. A template may not address your specific ownership structure, the particular vessel, state-specific legal requirements, or unusual arrangements between partners.

Recommended approach: 1. Use this guide and any templates as a starting point for discussions with your partners 2. Agree on all key terms before engaging a solicitor 3. Have a solicitor experienced in property or maritime law draft or review the agreement 4. Budget $1,500 to $3,000 for professional legal drafting

The cost of a properly drafted agreement is a small fraction of the asset value and the annual costs involved. Skipping this step to save money is a false economy.

For those who prefer to avoid the complexity of co-ownership agreements entirely, a boat club like My Boat Club provides access to premium boating on Sydney Harbour under simple, professionally managed membership terms.

Frequently Asked Questions

How long should a boat co-ownership agreement be?

A comprehensive agreement typically runs 10 to 20 pages. Shorter agreements may miss important provisions; much longer agreements become difficult to navigate. Clarity and specificity matter more than length.

Can the agreement be amended after signing?

Yes, by written agreement of all parties. Any amendments should be documented, signed, and attached to the original agreement. Review the agreement annually or when circumstances change significantly.

Does each partner need their own lawyer?

Ideally, each partner should have the agreement reviewed by their own solicitor to ensure their individual interests are protected. At minimum, the agreement should be drafted by a solicitor and all parties should have the opportunity to seek independent advice before signing.

What if we did not sign an agreement at the start?

It is never too late to document your arrangement. Draft an agreement now that reflects the current terms and any practices that have developed over time. Having a late agreement is far better than having none.