OK, so here is how the IRS figures it out on fishing boats.
Simple see
http://www.irs.gov/Businesses/Small-Bus ... #ch1-bkgrd........
Chapter 3 – Employment Classification
Examiners and other IRS representatives are sometimes faced with the difficult task of making a determination as to the classification of workers who provide services for others. The status of a worker as either an independent contractor or employee must be determined accurately to ensure that workers and businesses can anticipate and meet their tax responsibilities timely and accurately. The tax obligations of an employer of employees include income tax withholding, Federal Insurance Contributions Act (FICA), and Federal Unemployment Tax Act (FUTA) taxes (collectively, employment taxes).
In determining a worker’s status, the primary inquiry is whether the worker is an independent contractor or an employee. Generally, where the owner of a vessel contracts with the captain, who staffs and provisions the vessel and manages its day-to-day operations, both the captain and crew are employees of the owner. See United States v. Webb, Inc., 397 U.S. 179 (1970), (holding that the employment status of captain and crew is determined under the standards of maritime law, which is the common law of seafaring enterprises); Cape Shore Fish Co. v. United States, 330 F.2d 961 (Ct. Cl. 1964) (holding that the captain and crew were employees of the boat owner when the boat owner had control over the performance of services). An exception to this general rule is where the owner of a vessel surrenders entire command and possession of the vessel, and consequent control over its navigation, to the charterer. See The Norland, 101 F.2d 967 (9th Cir. 1939) and Webb, 397 U.S. at 192. In this case, the captain would be the employer.
Where the owner of the vessel is also the captain, and the captain contracts with the processor to provide services for a fee or a share of the catch, the examining agent should consider whether the captain is an independent contractor under the standard set forth in Webb. If the captain is an independent contractor, the crewmembers are probably employees of the captain. However, if the crewmembers are paid by the processor, IRC § 3401(d)(1) may operate to make the processor the employer for employment tax purposes.
Under IRC § 3401(d)(1), a person other than the common law employer (that is, the person with direction and control over the services) will be treated as an employer for employment tax purposes if (a) the common law employer does not have control of the payment of the wages; and (b) the third party does have control of the payment of the wages. "Control" over the payment of the wages for purposes of IRC § 3401(d)(1) means legal control. See Treas. Reg. § 31.3401(d)-1(f). See also Winstead v. United States, 109 F.3d 989 (4th Cir. 1997).
Once it is determined that the workers are employees, it must be determined whether the employees ' services are excepted from the definition of employment for employment tax purposes. IRC § 3121(b)(20) provides an exception from the FICA definition of employment for service on a catcher vessel that normally has fewer than ten crewmembers where the crewmembers are only paid a share of the boat 's catch, Exceptions from the definition of wages for purposes of income tax collection at the source and from the FUTA tax definition of employment are made by cross-references to IRC § 3121(b)(20) found, respectively, in IRC §§ 3401(a)(17) and 3306(c)(18). If the services of crewmembers are excepted from the definition of employment, then the workers are deemed to be self-employed for purposes of the Self-Employment Contributions Act (SECA). See IRC §1402(c)(2)(F).
The employer must issue a Form W-2 to each employee whose service is not excepted from the definition of employment and a Form 1099-MISC to all other payees.
Crewmembers
Individuals who work on fishing vessels as crewmembers are considered employees based on the standard common law rules. Crewmembers’ duties involve assisting with the functions of the fishing operation in the taking and catching of aquatic life. Under IRC § 3121(b) (20), these crewmembers may be considered self-employed for purposes of health insurance, pension plans, and employment taxes.
Under IRC § 3121(b)(20), a crewmember who would otherwise be classified as an employee is considered self-employed for purposes of self-employment taxes, health insurance, and pension plans, only if he meets all of the following conditions:
He does not receive any cash remuneration for his work, other than his share of the catch or of the proceeds from the sale of the catch, unless the pay meets all of the following conditions:
He does not get more than $100 per trip;
He is paid the additional amount only if there is some minimum catch;
He is paid solely for additional duties (such as for services performed as mate, engineer, or cook) for which additional cash payments are traditional in the fishing industry.
He receives a percentage share of the catch or a percentage share of the proceeds from the sale of the catch.
His share depends on the amount of the catch (percentage).
He receives his share from a boat (or from each boat in the case of a fishing operation involving more than one boat) with an operating crew that is normally made up of fewer than ten individuals. This requirement is considered to be met if the average number of crewmembers on trips the boat made during the last four calendar quarters was less than ten.
Example 1. A boat owner hires a captain, a mate, an engineer, a cook, and five other crewmembers to work on his fishing boat. The proceeds from the sale of the catch offset boat operating expenses such as bait, ice, and fuel. The owner divides 60% of the balance among the captain, the mate, and the crewmembers. He divides the other 40% between himself and the captain. The mate, the engineer, and the cook also each receive an extra $100 for each trip that brings back a certain minimum catch. The crewmembers do not receive any additional pay between voyages, but they must do certain work, such as repairing nets, splicing cable, and transporting the catch.
For purposes of employment and self-employment taxes, each crewmember (including the captain, mate, engineer, and cook) is considered self-employed. The owner must file Forms 1099-MISC to report amounts paid to them.
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OK, you get the picture, so I won't post the rest. BTW, I started at Chapter 3.