Overview: Aquarium-related expenses can be tax-deductible if business-related. Hobby expenses are NOT deductible per IRS.
Hobby vs business: IRS uses 9-factor test. Profit motive + business records + active management + dependence on income all increase business classification.
Business deductions: Equipment + livestock + supplies for business. Maintenance expenses. Home office (% of utilities). Business-related travel.
Equipment depreciation: Major aquarium equipment can be depreciated over 5-7 years. Section 179 deduction allows immediate expensing for some.
Loss treatment: Business losses are deductible in current year. Hobby losses are NOT deductible.
Self-employment tax: Aquarium business income subject to self-employment tax (15.3% Social Security + Medicare). Net profit determines amount.
Where to learn more: Browse aquarium career paths.