Owner-operator taxes: 1099 vs W-2, quarterly payments, per diem and deductions

The first tax year as an owner-operator surprises almost everyone. Nobody withholds anything, the money in the account looks like yours, and the following April the bill arrives with a penalty for not paying it sooner. This guide explains how the pieces fit: how 1099 income is taxed, why self-employment tax exists, how quarterly payments work, what the per diem is, which expenses are deductible, and where Form 2290 fits. It is an orientation, not tax advice; every rate and amount below links to the IRS page it came from, and a tax professional who knows trucking is worth what they cost.

1099 vs W-2

A company driver is a W-2 employee: the carrier withholds income tax and the employee’s share of Social Security and Medicare from each check, pays the employer’s share itself, and sends a W-2 in January. An owner-operator leased to a carrier, or running under their own authority and hauling for brokers, is paid gross. The carrier or broker reports what it paid on Form 1099-NEC, and the owner-operator handles all of the tax.

Which one you are is not up to the contract title. The IRS looks at behavioral control, financial control and the relationship itself (IRS Topic 762). An owner-operator with their own truck, their own expenses and the freedom to refuse loads is a contractor by any reading; the settlement guide covers the question from the carrier’s side.

Three taxes on the same income

1. Federal income tax on your net profit: revenue minus deductible expenses, reported on Schedule C. The rate depends on your total income and filing status.
2. Self-employment tax on the same net profit. This is Social Security and Medicare, both halves, because you are the employer and the employee. The IRS puts the rate at 15.3%: 12.4% for Social Security and 2.9% for Medicare, figured on Schedule SE, and it applies once net earnings reach $400 (IRS: Self-employment tax). The Social Security part applies only up to an annual wage base that changes each year. You deduct the employer-equivalent half of the self-employment tax when figuring adjusted gross income, which softens it slightly.