LOL- You must have never paid income taxes in your life you nimrod. Any fighter that is making $75K a year in gross income is not paying anywhere near 30%. They are probably getting money back from the government ffs.
His health insurance- Deductible as a cost
Any equipment- Deductible as a cost
Agent/Manager/Coach/Gym- Deductible as a cost
Supplements and probably a chunk of his food- Deductible as a cost.
Mileage on his car to and from anywhere business related including to the gym, interviews, airports, anything-To the tune of 54 cents per mile-Deductible as a cost. I bet there are fighters out there that eat up 2/3 of their tax liability driving a POS car worth 7-8K for 45,000 miles a year. I Have a 2004 Camry with 239,000 miles on it worth maybe 2K that I drive almost 60K miles a year, netting $32000 straight off the bottom line.
Those are straight up costs. That will take the 75 K down to 40K or so if not even lower. Then of course he will be getting to peel of a chunk of his rent and utilities as business expenses.
And from there they will get an additional 5K-20K in exemptions and deductions from their 1040.
Taxable income on 75K in gross income for a UFC fighter could very well be 'negative'. But for sure and for certain they would maybe paying in the 10% bracket for most of their taxable income, which would almost certainly be under 10K. So figure Maybe $1000 in income tax. TOTAL