The payout isnt good.
You would be hard pressed to convince the IRS fishing is a business not a hobby if all you wanted to do was actually fish these events for a living.
The new tax law is not good for tournament fishermen not making a profit. If it is a hobby, you must claim the income but get to deduct none of the expense.
" Due to the suspension of miscellaneous itemized deductions in the years 2018 through 2025, deductions for hobby expenses under Sec. 183 and investment expenses under Sec. 212 are not allowed in those years (Sec. 67(g), as added by the law known as the Tax Cuts and Jobs Act (TCJA), P.L. 115-97).
The inability of a taxpayer to deduct even a portion of the hobby expenses while recognizing all the hobby income in adjusted gross income makes establishing a profit motive for a hobby activity even more desirable. The determination of whether an activity is engaged in for profit is based on the facts and circumstances of each case and can be very subjective; however, a statutory safe harbor is provided under Sec. 183(d) that, if met, causes a presumption that the activity is a for-profit endeavor.
To meet the safe harbor, an activity must generate a profit in at least three of five years (two of seven years for activities involving horse racing, breeding, or showing) ending with the tax year in question (Sec. 183(d)). If this safe harbor is met, the burden of proof for lack of profit motive is shifted to the IRS.
The IRS can still rebut the profit motive presumption by proving that the activity is not engaged in for profit (e.g., by showing that the profitable years generated immaterial profits while the unprofitable years generated large losses). In most cases, if the safe harbor is met, the IRS will not attempt to rebut the presumption unless there are extenuating circumstances."
It can really get messy real quick if you are taking large losses against your wife's or your other income. I personally know a couple former BASS pros who had their deductions disallowed because they were financing their tournament fishing with the wife's income.