Estimated taxes for 1099 contractors — the basics

Last updated: July 23, 2026

Applies to: US independent contractors (1099). Employees have taxes withheld automatically — see Understanding the taxes withheld from your paycheck.

Summary: Nothing is withheld from your contractor payments — you're responsible for income tax and self-employment tax (both halves of Social Security and Medicare) yourself, and the IRS generally expects you to pay as you earn through quarterly estimated tax payments. This article is general education, not tax advice — a tax professional can tell you what's right for your situation.

Why you owe estimated taxes

For W-2 employees, your employer withheld taxes from every paycheck. As a 1099 contractor, your payments arrive gross — so the taxes still exist, but paying them is on you:

  • Income tax — federal (and state, where applicable) on your net self-employment income.

  • Self-employment tax — as a contractor you pay both the employee and employer portions of Social Security and Medicare, which W-2 workers split with their employer.

How quarterly payments work (in brief)

  • The IRS generally expects tax to be paid as income is earned, not just at filing time — for most contractors that means four estimated payments a year (typically due mid-April, mid-June, mid-September, and mid-January).

  • Underpaying during the year can mean penalties and interest at filing time, even if you pay everything in April.

  • Many contractors set aside a fixed percentage of every payment into a separate account so the quarterly payment is always covered. The right percentage depends on your income, state, deductions, and entity setup — this is exactly the question a tax professional answers quickly.

What Ascen provides (and doesn't)

  • We report what your business was paid on a 1099-NEC (see When will I get my 1099-NEC?) and your payment history is always available in your portal — useful for computing quarterly estimates.

  • We cannot withhold taxes from contractor payments or tell you how much to pay — that would be individual tax advice.

Deductions worth knowing exist

As a business, your legitimate business expenses (equipment, insurance premiums — including the coverage required by your agreement — mileage, home office where eligible) generally reduce your taxable self-employment income. Track them from day one; your tax preparer will thank you.

This is general education, not tax advice. Consult a tax professional or the IRS/your state tax agency for your specific situation.

  • Am I a W-2 employee or a 1099 independent contractor? (US)

  • When will I get my 1099-NEC?

  • Insurance requirements for independent contractors