Independent Contractor or Employee? The Tests That Decide
The worker didn't choose their status and neither did the contract — the IRS common-law factors, the DOL's economic-reality test, and state ABC tests decide it, and each answers to a different agency.

Why the contract doesn't decide
Classification is the rare question where three different governments each apply their own test to the same worker — the IRS for employment taxes, the Department of Labor for minimum wage and overtime, and the states for unemployment insurance, workers' comp and wage law. All three share one principle: the substance of the relationship controls, not the paperwork. A contractor agreement, an invoice process and a 1099 prove nothing if the company directs the work like an employer. And because a misclassified "contractor" is really a non-exempt employee in most cases, the wage exposure compounds the tax exposure.
The three tests
What misclassification costs
On the tax side: the employer's share of FICA plus the withholding that should have happened, with penalties and interest — the IRS's Voluntary Classification Settlement Program exists precisely because full exposure is severe. On the wage side: back overtime and minimum wage under the FLSA's two-to-three-year lookback with liquidated damages. Then unemployment contributions, workers' comp premiums, and — in states like California — statutory penalties per violation. The multiplier is the class: classification decisions are almost never individual, so one wrong template prices across everyone hired on it.
Structuring a real contractor relationship
Genuine contractor relationships are built, not papered: define deliverables rather than hours and methods; let the contractor set their schedule, tools and place of work; pay by project where possible; never fold contractors into employee training, meetings, reviews or benefits; and expect — welcome — their other clients. Where the role sits inside your core business in an ABC-test state, the honest answer is usually employment: hire them properly through the new-hire process, or engage a firm rather than an individual. Reclassifying voluntarily, prospectively, on counsel's advice is dramatically cheaper than doing it after an audit letter arrives.