#self-employment-tax
Self-employment tax rules, calculations, and strategies for business owners
Stock photo and video royalties from platforms like Adobe Stock and Shutterstock are almost always Schedule C income subject to 15.3% self-employment tax — not passive royalties. This guide covers the hobby-vs-business test, reconciling multi-platform 1099s, deducting gear via Section 179 ($2,560,000 limit) or 100% bonus depreciation, and when quarterly estimated payments kick in.
The 2026 IRS 1099-K threshold for platforms like eBay, StockX, and Whatnot is back to $20,000 and 200 transactions, but sneaker and trading card resellers still owe tax on profit below that line — here's how to nail cost basis, inventory tracking, and the hobby-vs-business test.
Boatsetter and GetMyBoat report gross transaction volume on Form 1099-K, not your net payout, so record the full charter price as revenue and the platform commission as a separate expense — and track bareboat versus captained bookings separately, since adding a captain shifts income from Schedule E to Schedule C self-employment tax.
IKO's Basic Instructor Membership covers instructors for recreational liability but excludes students during lessons unless the instructor teaches through a recognized IKO Center, a coverage gap kiteboarding schools should reflect in separate insurance sub-accounts, fleet depreciation schedules, and worker-classification decisions.
Authors receiving publisher AI-licensing checks — including payouts from Anthropic's roughly $1.5 billion author settlement — should verify their contract grants those rights, confirm they're getting the Authors Guild-recommended 75-85% split, and report the income on Schedule C as self-employment income, not Schedule E.
Real estate agents should record gross commission and brokerage splits as separate line items, not just the net deposit, because the IRS matches Schedule C income against the gross figure brokerages report on Form 1099-NEC.
Rental arbitrage bookkeeping differs from landlord accounting because the lease is a pure operating expense with no equity, only furniture is depreciable over 3-5 years, and most operators land on Schedule C rather than Schedule E once average guest stays fall under 30 days with services provided.
US freelancers billing foreign clients must convert income to USD at the exchange rate on the day of receipt, pay self-employment tax regardless of the client's location, and may owe an FBAR filing if combined foreign-held balances (e.g. in Wise or Payoneer) exceed $10,000 at any point in the year.
IRS Direct File will not return for the 2026 filing season; IRS Free File, FreeTaxUSA, Cash App Taxes, VITA, and MilTax remain free options, but only some fully support Schedule C for freelancers and small business owners.
Locum tenens and travel-healthcare clinicians are 1099 contractors who owe 15.3% self-employment tax, must establish a valid IRS tax home to deduct travel costs, and often file non-resident state returns for every state where they worked.
A $150 mobile detail costs $15-$20 in chemicals plus fuel, equipment wear, and unbilled quote time; tracking cost-per-job, the 72.5-cent 2026 IRS mileage rate, Section 179 equipment write-offs, and profit-per-drive-hour reveals whether a detailing business is actually as profitable as its revenue suggests.
Claude, GitHub Copilot, and Cursor subscriptions are fully deductible under IRC Section 162 as ordinary business expenses, while Section 174 R&D amortization only applies to labor and compute tied to genuine new product development — and the 2025 One Big Beautiful Bill Act restored immediate deduction for domestic R&E costs.
