A contractor, in the sense most people mean when they ask the question, is an independent contractor: a self-employed worker who runs their own business and provides services to clients rather than working as part of a company’s staff. The contractor controls how the work gets done, absorbs their own overhead, pays their own taxes, and carries their own insurance. The client pays for a result. That single distinction, staff versus independent business, drives everything else, from tax forms to benefits to legal protections.
The label on a contract doesn’t settle the question by itself. Both the IRS and the U.S. Department of Labor apply multi-factor tests based on how the work actually happens. A worker called a contractor on paper can be reclassified as an employee if the day-to-day facts point that way, and the wrong classification exposes both sides to back taxes, wage claims, and penalties.1https://www.irs.gov/businesses/small-businesses-self-employed/independent-contractor-defined
How the IRS Draws the Line
The IRS looks at three broad categories of evidence: behavioral control, financial control, and the type of relationship between the parties. No single factor controls. The agency weighs the full picture, and strong evidence in one area can outweigh weaker evidence in another.
Behavioral Control
Behavioral control asks whether the hiring party has the right to direct how the work gets done. The right matters even if it isn’t exercised. If the business can dictate when the worker shows up, what sequence to follow, or which tools to use, that points toward employment. Contractors keep control over their methods. They set their own schedules, choose their own approach, and usually don’t receive training from the client on how to perform the work. The more detailed the instructions, the more the relationship resembles employment. A client who cares only about the finished deliverable and leaves the process alone is dealing with a contractor.
Financial Control
Financial control looks at whether the worker has a genuine chance to profit or lose money based on their own business decisions. Contractors typically invest in their own equipment, software, and workspace. They pay unreimbursed business expenses, often work for more than one client, and can lose money if a project falls through. Payment structure is part of the picture but not the whole picture. Flat project fees are common, and hourly billing is normal in fields like consulting and law. What separates contractors from employees on the money side isn’t the billing method, it’s the economic reality: no benefits, no reimbursed overhead, and real exposure to loss.
Type of Relationship
The third category examines the relationship itself. The IRS weighs four things here: whether a written contract exists, whether the business provides employee-type benefits, how permanent the arrangement is, and whether the worker’s services are a key part of what the business does. A written agreement calling someone a contractor helps, but it isn’t decisive. Benefits like health insurance, a pension plan, or paid sick days strongly suggest employment. A project with a defined end date supports contractor status; an indefinite arrangement doesn’t. And when a worker’s tasks sit at the core of what the business does, the business is more likely to direct that work, which again cuts toward employment.
The Department of Labor’s Economic Reality Test
The Department of Labor applies its own framework under the Fair Labor Standards Act, called the economic reality test, to decide whether a worker is economically dependent on a business or genuinely in business for themselves. Six factors go into the analysis, and none of them controls by itself:
- Opportunity for profit or loss based on managerial skill, such as hiring helpers, choosing clients, or negotiating rates.
- Investments by the worker and the potential employer, and whether the worker’s investments look like those of an independent business.
- Permanence of the relationship, meaning whether it’s ongoing and indefinite or tied to a defined project.
- Nature and degree of control, including scheduling, supervision, pricing, and the ability to work for others.
- Whether the work is integral to the potential employer’s business.
- Skill and initiative, meaning whether the worker uses specialized skills in a way that reflects independent business judgment.
The DOL treats these factors as a totality-of-the-circumstances analysis and can consider additional factors when they help clarify whether the worker is truly independent.
Workers the Statute Classifies for You
Federal law overrides the general tests for certain jobs. Under 26 U.S.C. ยง 3121(d), some workers are statutory employees for tax purposes even when they operate independently by ordinary measures: agent-drivers and commission-drivers distributing goods, full-time life insurance salespeople, certain home workers producing goods to a company’s specifications, and full-time traveling salespeople soliciting orders for a single principal.
On the other side, statutory nonemployees are treated as self-employed by law even when some facts suggest employment. The IRS recognizes three groups: direct sellers, licensed real estate agents, and certain companion sitters. For direct sellers and real estate agents, two conditions apply. Pay must be tied to sales or output rather than hours, and a written contract must state that the worker won’t be treated as an employee for federal tax purposes. If your work falls into one of these statutory categories, classification is settled by law and the multi-factor tests don’t decide the question.
The Taxes a Contractor Pays
Because no employer withholds payroll taxes from contractor payments, the contractor pays both the employer and employee shares of Social Security and Medicare. The combined self-employment tax rate is 15.3%, made up of 12.4% for Social Security and 2.9% for Medicare. For 2026, the Social Security portion applies only to the first $184,500 in net self-employment earnings. Every dollar above that ceiling is still subject to the 2.9% Medicare tax, and an additional 0.9% Medicare surtax kicks in once self-employment income exceeds $200,000, or $250,000 for married couples filing jointly.
Half of the self-employment tax is deductible as an adjustment to gross income, calculated on Schedule SE and reported on Schedule 1 of Form 1040. This reduces taxable income even for contractors who don’t itemize.
Contractors pay in through quarterly estimated payments on Form 1040-ES rather than through paycheck withholding. For the 2026 tax year, the deadlines are April 15, June 15, September 15, and January 15, 2027. To avoid an underpayment penalty, you generally need to pay at least the smaller of 90% of what you’ll owe for the current year or 100% of last year’s total tax. If your adjusted gross income last year was over $150,000 ($75,000 if married filing separately), that second threshold rises to 110%. Interest accrues on any quarter that came up short.
Income gets reported on Schedule C. When a client pays a contractor $600 or more in a calendar year, the client is required to issue Form 1099-NEC by January 31. Payments below $600 are still taxable; the client just isn’t required to file the form. Payments received through third-party platforms like PayPal or credit card processors may generate a 1099-K instead. Under the One, Big, Beautiful Bill, the 1099-K reporting threshold reverted to $20,000 in gross payments and more than 200 transactions in a calendar year.
Deductions That Offset Self-Employment Tax
Contractors report income and expenses on Schedule C, and deductions directly reduce taxable profit. To qualify, an expense must be both ordinary (common in your line of work) and necessary (helpful and appropriate for your business). Common categories include:
- Vehicle expenses, using either actual costs or the standard mileage rate. You pick one method for each vehicle from the start and keep a mileage log either way.
- Home office costs, if you use part of your home regularly and exclusively for business. You can deduct a proportionate share of rent or mortgage interest, utilities, and insurance, or use the simplified method at $5 per square foot up to 300 square feet.
- Supplies, software subscriptions, postage, and equipment. Larger equipment purchases can often be expensed immediately under Section 179 instead of depreciated over years.
- Health insurance premiums for yourself, your spouse, and dependents, if you aren’t eligible for an employer-sponsored plan through a spouse. This is an adjustment to income, not an itemized deduction.
- Retirement contributions through a Solo 401(k) or SEP-IRA, with limits generally higher than a traditional employer plan.
- Professional services, including accounting fees, legal fees, and business insurance premiums, deductible in the year paid.
Expenses that mix personal and business use, like a cell phone or home internet, are deductible only for the business-use percentage.
What Contractors Give Up, and What Misclassification Costs
Working as a contractor means giving up unemployment insurance, workers’ compensation coverage through the hiring party, employer-provided benefits, and the employer’s share of payroll taxes. It also means giving up FLSA protections such as overtime pay and the minimum wage. Contractors aren’t covered by a client’s general liability or workers’ comp policies, which is why most carry their own general liability coverage, and often professional liability coverage where the work involves advice, design, or other services that could cause financial harm to a client.
If a business calls a worker a contractor but the facts describe an employee, the fallout runs in two directions. Under Section 3509 of the Internal Revenue Code, a business that filed the required 1099s and acted in good faith owes 1.5% of wages for the income tax withholding portion and 20% of the normal employee Social Security tax amount. A business that failed to file the proper information returns owes double those rates: 3% and 40%. The DOL can pursue misclassification separately under the FLSA, going after back wages for unpaid overtime and minimum wage violations plus an equal amount in liquidated damages. A two-year statute of limitations applies to most back-pay claims, and willful violations stretch that to three years.
Workers who suspect they’ve been misclassified can file Form SS-8 with the IRS to request a formal determination of their status. Either the worker or the hiring party can submit the form, and the IRS decides based on the facts of the working relationship rather than the label in the contract.