Starting a charter boat business legally means clearing a stack of federal requirements before your first paying passenger steps aboard: a Coast Guard merchant mariner credential matched to your passenger count, a TWIC card, enrollment in a drug testing program, federal documentation for the vessel itself, commercial insurance built for maritime risk, and — if you plan to carry more than six passengers — a Certificate of Inspection. Learning how to start a charter boat business is largely a matter of working through those items in the right order, because several of them depend on the ones before.
Get the Right Captain’s License
Every person operating a vessel that carries passengers for hire needs a Merchant Mariner Credential from the Coast Guard. Which endorsement you pursue turns on how many passengers you plan to take out.
Six Passengers or Fewer: The OUPV
For six passengers or fewer, you need the Operator of Uninspected Passenger Vessels endorsement, commonly called the six-pack. To qualify, you must document at least 360 days of boating experience, with 90 of those days in the last three years.1eCFR. 46 CFR Part 10 Subpart B – General Requirements for All Merchant Mariner Credentials You then pass a written exam covering navigation rules, safety, and basic maritime law, plus a physical and vision test.
More Than Six: The Master License
Carrying more than six passengers requires a Master license, and the vessel itself must hold a Coast Guard Certificate of Inspection. The most common path for small charter operations is a near-coastal Master endorsement on vessels under 100 gross register tons, which requires two years (720 days) of deck department service, with some time on ocean or near-coastal waters.2United States Coast Guard. Charter Boat Captain An inland-only Master endorsement typically requires one year of service. The physical and written testing mirror the OUPV, though the exam is broader.
Coast Guard evaluation fees for a new credential run roughly $145 to $240 depending on whether you took an approved training course before applying. A course lowers the fee and improves your odds on the exam.
TWIC Card and Drug Testing
Two federal requirements sit alongside your mariner credential and apply to every commercial operator.
The Transportation Worker Identification Credential is a biometric ID card issued by the TSA. You visit an enrollment center, submit fingerprints, and go through a security threat assessment. A new TWIC currently costs $124.3Transportation Security Administration. TWIC Without it, you cannot hold an active mariner credential or access secure maritime facilities.4TSA Enrollment by IDEMIA. Transportation Worker Identification Credential (TWIC)
Federal rules also require credentialed mariners on commercial vessels to be subject to random drug testing at a minimum annual rate of 50 percent.5eCFR. 46 CFR Part 16 – Chemical Testing Solo operators almost always join a drug testing consortium that handles scheduling, collection, and recordkeeping for a monthly or annual fee. Testing is also required before hiring new crew, after any serious marine incident, and whenever reasonable cause exists. If any required crew member isn’t enrolled in a compliant program, you cannot legally operate.
Document the Vessel
A vessel used in coastwise trade — which includes carrying passengers for hire in U.S. waters — must be documented with the Coast Guard’s National Vessel Documentation Center if it measures five net tons or more.6eCFR. 46 CFR Part 67 – Documentation of Vessels Vessels under five net tons cannot be documented at all and must be state-registered instead. That five-net-ton line decides whether you file federally or with your state.
The CG-1258 Application
If your vessel meets the threshold, you file Form CG-1258 with the NVDC. The application requires your Hull Identification Number, detailed measurements for tonnage calculation, and proof that all owners are U.S. citizens, which is a constitutional requirement for coastwise-endorsed vessels.7Regulations.gov. Supporting Statement for Vessel Documentation If an LLC or corporation owns the vessel, the entity’s name on the documentation must match its legal name exactly. Any mismatch creates processing delays.
Tonnage Measurement
Vessels under 79 feet are eligible for simplified tonnage measurement using Coast Guard Form CG-5397, which lets you skip hiring a formal marine surveyor.8dco.uscg.mil. Simplified Measurement Tonnage Guide 1 Most charter boats qualify. You can’t receive a Certificate of Documentation without an official tonnage determination, so this step is part of the initial application.
Fees and Annual Renewal
The initial documentation fee for a commercial vessel is $133.9National Vessel Documentation Center. Table of Fees Commercial Certificates of Documentation must be renewed every year at a cost of $26, and the renewal must happen before the certificate expires. Operating with a lapsed certificate is treated the same as having no documentation at all.10dco.uscg.mil. NVDC COD Renewals Processing can take weeks to months, so file early.
Certificate of Inspection for Larger Passenger Counts
The moment you plan to carry more than six passengers, you cross into inspected vessel territory and need a Certificate of Inspection before you operate. The COI proves your vessel meets federal construction, stability, and safety standards. Without it, you cannot legally board a paying passenger.
Most charter boats under 100 gross tons fall under Subchapter T of 46 CFR, which governs small passenger vessels.11eCFR. 46 CFR 2.01-7 – Classes of Vessels Examined or Inspected and Certificated
Stability Testing
You must demonstrate that the vessel remains stable with a full passenger load. For vessels 65 feet or shorter carrying no more than 12 passengers on international voyages, the Coast Guard allows a simplified stability proof test rather than a full naval architecture analysis.12eCFR. Part 178 – Intact Stability and Seaworthiness The vessel is loaded with weights simulating a full complement of passengers and crew, and the angle of heel cannot exceed 14 degrees under calculated heeling forces. Failing this test forces modifications to the vessel or a reduced passenger count on your COI.
Validity and Renewal
A COI for a domestic small passenger vessel is valid for five years, and the Coast Guard can suspend or revoke it at any time for noncompliance.13eCFR. Subpart A – General Provisions; Certificate of Inspection Vessels carrying more than 12 passengers on international voyages get a one-year COI. Renewal involves a periodic inspection where a marine inspector physically examines the vessel and its equipment, plus drydock examinations of the hull below the waterline.
Form the Business and Set Up Taxes
Before you apply for vessel documentation or a COI, set up a legal entity. Most charter operators pick an LLC for liability protection, though a corporation works. Register the entity with your state first, then apply for an Employer Identification Number from the IRS. The IRS will hold up your EIN if the state entity isn’t formed yet.14Internal Revenue Service. Get an Employer Identification Number You need the EIN for tax filings, opening a commercial bank account, and hiring crew. State filing fees for an LLC or corporation vary by jurisdiction and generally fall between $50 and $500.
One federal tax worth flagging: operators running overnight voyages on vessels with berth accommodations for 17 or more passengers face a federal excise tax of $3 per passenger, reported on IRS Form 720.15Internal Revenue Service. Instructions for Form 720 A qualifying voyage lasts longer than 24 hours. The tax also applies to commercial vessels transporting passengers for gambling beyond U.S. territorial waters. Most six-pack and day-trip operators never trigger it; if overnight fishing trips on a larger vessel are part of the plan, price it in.
Insurance and Crew Liability
Standard boat insurance doesn’t cover commercial operations. You need Protection and Indemnity insurance, the maritime equivalent of commercial general liability. P&I covers bodily injury to passengers, property damage, and environmental incidents like fuel spills. Hull insurance, which covers physical damage to the vessel, is separate. Most charter operators carry both.
Your coverage also has to account for the Jones Act, which gives any crew member injured on the job the right to sue you for damages, including negligence claims beyond what land-based workers’ compensation would cover.16Office of the Law Revision Counsel. 46 USC 30104 – Personal Injury to or Death of Seamen Even a single deckhand counts.
Maritime law adds a separate obligation called maintenance and cure. If a crew member gets sick or injured while working for you, regardless of fault, you owe them daily living expenses (maintenance) and medical costs (cure) until they either recover or reach a point where further treatment won’t help. The obligation is absolute. You cannot contract out of it, and failing to pay promptly can expose you to punitive damages.
Safety Equipment and the Passenger Briefing
Every person aboard needs a Coast Guard-approved lifejacket. On inspected vessels under Subchapter T, lifejackets must be approved under specific federal standards, and any off-the-shelf PFD will not qualify.17eCFR. 46 CFR Part 180 – Lifesaving Equipment and Arrangements You also need child-sized lifejackets equal to at least 10 percent of your maximum passenger count unless your COI is endorsed adults-only. Beyond lifejackets, the vessel must carry marine-rated fire suppression equipment, unexpired visual distress signals, and ring life buoys. Expired or missing equipment is one of the fastest routes to a suspended COI.
Before getting underway, or as soon as practicable after departure, the master must brief passengers on safety. Federal regulations set out what has to be covered:18eCFR. 46 CFR 185.506 – Passenger Safety Orientation
- Where survival craft are located and where to gather in an emergency.
- Where lifejackets are stowed.
- How to don a lifejacket, either by demonstration or by telling passengers they can request a demonstration from crew before an ocean or coastwise voyage.
- Posted instruction placards for lifejackets and other safety devices.
- That the master can order everyone into lifejackets during hazardous conditions.
Skipping the briefing is a citable violation during a Coast Guard boarding.
If Your Vessel Was Built Overseas
Federal law restricts coastwise trade to U.S.-built vessels, which is a problem if the boat you want was built abroad. The Maritime Administration’s Small Vessel Waiver allows certain foreign-built vessels to carry passengers in U.S. waters if the vessel:19MARAD. Small Vessel Waiver Program
- Is owned by a U.S. citizen or U.S. organization
- Is at least three years old
- Carries no more than 12 passengers
- Is used only for passenger service (no cargo, towing, dredging, or commercial fishing)
- Meets all applicable Coast Guard safety requirements
Sport fishing is allowed under the waiver as long as the catch isn’t sold commercially. The application fee is a non-refundable $500. Operating a foreign-built vessel commercially without this waiver violates the Jones Act’s cabotage provisions.
What Illegal Operations Cost
The Coast Guard patrols for illegal charters, and enforcement has grown more aggressive in high-traffic areas like South Florida, the Gulf Coast, and popular fishing ports. Current civil penalties reach up to $49,848 for operating a vessel carrying six or fewer passengers without a Coast Guard license, and up to $14,988 for failing to have a Certificate of Inspection on a vessel carrying more than six passengers.20United States Coast Guard News. Coast Guard Encourages the Public to Avoid Illegal Operations This Boating Season Violating a Captain of the Port Order, which is what happens when the Coast Guard tells you to stop and you don’t, can cost up to $117,608 per day. The Coast Guard can also terminate your voyage on the water, order passengers ashore, and refer egregious cases for criminal prosecution. These penalty amounts adjust periodically for inflation, and they climb.