What is the difference between a W-2 and a 1099?

A W-2 reports wages from an employer who has already withheld income tax, Social Security, and Medicare from each paycheck. A 1099 reports payments made to you as a business, with nothing withheld. The income can be similar; the tax handling is not. A 1099 usually means self-employment tax, quarterly estimated payments, and business expenses reported on Schedule C.

Key points

A W-2 reports wages from which an employer normally withheld income tax, Social Security, and Medicare and paid a matching employer share, so most of the tax on that income is already paid before the return is filed.
A 1099 for services performed as a nonemployee generally reports a payment made with no income tax withheld, so the recipient owes both income tax and self-employment tax on the resulting profit; other 1099s, such as those for interest, dividends, or rent, do not carry self-employment tax.
A person receiving 1099 income for services generally reports it on Schedule C as a sole proprietor and deducts ordinary business expenses against it.
Someone in business for themselves generally has to make estimated tax payments across four periods during the year rather than paying at filing.
Whether a worker is an employee or an independent contractor depends on how the work is controlled, not on which tax form the payer issues.

What does each form actually report?

A W-2 reports wages paid by an employer, together with the tax that employer already withheld: income tax based on the Form W-4 on file, plus the employee's share of Social Security and Medicare, with the employer paying a matching share. Most of the tax on that income has been paid before the form is issued.

A 1099 reports a payment made to someone who is not an employee, with nothing withheld. The gross amount was handed over and no tax has been paid on it by anyone. Different 1099s cover different payment types — services, rents, interest, card and platform settlements — but the common feature is the absence of withholding.

How does the tax treatment differ?

W-2 income arrives with its tax largely settled; the return reconciles it, often producing a refund. Income reported on a 1099 for services arrives untaxed, and the recipient is treated as running a business. That profit is reported on Schedule C, which is used for income or loss from a business operated or a profession practised as a sole proprietor.

Two taxes then apply rather than one. Income tax is charged on the profit, and self-employment tax is charged on net earnings, covering both the employee and the employer share of Social Security and Medicare that a wage earner splits with an employer. A person moving from a W-2 job to contract work at the same headline pay is not in the same position, and the difference is mainly this.

What has to change in how you pay?

Tax is paid as income is earned, through withholding or through estimated tax payments. A person in business for themselves generally has to make estimated payments, and the year is divided into four payment periods with their own due dates. Paying the whole balance at filing instead produces an underpayment penalty, which can apply even when a refund is eventually due.

Anyone who also holds a job has a simpler option available. Filing a new Form W-4 with an employer to withhold an additional amount from each paycheck can cover the tax on the business income, because withholding is credited across the year rather than on the date it was paid. For a household with one wage and one small business, that is often less work than managing four separate payments.

Does the form decide whether you are an employee or a contractor?

It does not. Classification depends on the substance of the working relationship — how the work is directed, controlled, and organised — and the form issued follows from the classification rather than creating it. Issuing a 1099 to someone who functions as an employee does not make them a contractor, and the resulting payroll tax exposure sits with the business.

The practical offset for a genuine contractor is deductions. Ordinary business expenses come off gross receipts on Schedule C, so tax is charged on profit rather than on revenue. Business car expense is the clean example: a self-employed person deducts it on Schedule C under either the standard mileage rate or the actual expense method, while an employee generally cannot deduct the same cost, with narrow exceptions for Armed Forces reservists, qualified performing artists, and fee-basis state or local officials.