Quarterly Estimated Taxes for Owner-Operators: 2026 Dates and Math

Why owner-operators pay tax four times a year

A company driver on a W-2 has income tax, Social Security and Medicare taken out of every paycheck. When you run your own truck, nobody does that. The broker or carrier pays the full rate, and the tax on it is yours to send in. The IRS does not wait until April of the next year for it. Estimated tax is the way you pay as you go, and Form 1040-ES is the form and worksheet the IRS publishes for it.

There are two taxes inside that payment. The first is regular income tax on your profit. The second is self-employment tax, which is Social Security and Medicare for people who work for themselves. Both come out of the same estimated payment.

Do you have to make estimated payments?

The 2026 Form 1040-ES gives a two-part test. You must make estimated payments if both are true:

• You expect to owe at least $1,000 in tax for 2026 after subtracting your withholding and refundable credits.
• You expect your withholding and refundable credits to be less than the smaller of 90% of the tax on your 2026 return, or 100% of the tax on your 2025 return (the 2025 return has to cover all 12 months).

If your adjusted gross income for 2025 was more than $150,000 ($75,000 if you are married filing separately in 2026), the second figure is 110% of your 2025 tax instead of 100%.

There is one more way out. If you had no tax liability for 2025, were a U.S. citizen or resident for the whole year, and your 2025 tax year covered 12 months, you do not have to pay estimated tax for 2026.

If your spouse has a W-2 job, there is another option. The form notes that if you also receive wages, you may be able to avoid estimated payments by asking the employer to withhold more tax.

2026 estimated tax due dates

Payment	Due date	Status on October 30, 2026
1st	April 15, 2026	Passed
2nd	June 15, 2026	Passed
3rd	September 15, 2026	Passed
4th	January 15, 2027	Next one due

If a date falls on a Saturday, Sunday or legal holiday, the payment is due the next business day. You do not have to make the January payment if you file your 2026 return by February 1, 2027 and pay the whole balance with it.

If you mail a check, the 2026 form points out a clarification of the postmark rules. The postmark date is the date the payment is processed at a USPS facility, which can be later than the day you dropped it in the box. Mailing on the due date is a risk. Paying online removes that question.

How much to pay: the self-employment part

Self-employment tax is 15.3%: 12.4% for Social Security and 2.9% for Medicare. It applies when your net earnings from self-employment are $400 or more. It is not figured on your full net profit. The 1040-ES worksheet tells you to use 92.35% of your net profit, and for 2026 the Social Security part stops at $184,500 of combined earnings.

Here is how the arithmetic works for a truck with $80,000 of net profit for the year, after fuel, insurance, maintenance, truck payments and the other deductions owner-operators can take:

• $80,000 × 92.35% = $73,880 of net earnings from self-employment.
• $73,880 × 15.3% = $11,303.64 of self-employment tax.
• Half of that, $5,651.82, is deductible when you figure adjusted gross income.

That $11,303.64 comes before a single dollar of income tax. The income tax part depends on your filing status, your deductions and any other income in the household, which is why the 2026 Estimated Tax Worksheet runs to 15 numbered lines. The number to take away is that self-employment tax alone is roughly 14% of net profit in this example.

Net profit is only as good as the books behind it. If fuel receipts, settlements and repair invoices are not sorted every week, the estimate is a guess. Our guide to trucking bookkeeping for owner-operators covers the weekly, monthly and quarterly routine that makes this number real.

The simplest safe number: last year’s tax

Trucking income moves with rates, fuel and breakdowns, so 90% of this year’s tax is a moving target until December. The other half of the test is fixed: 100% of the total tax on your 2025 return (or 110% above the AGI threshold). The IRS says taxpayers generally avoid the underpayment penalty when they paid at least the smaller of the two figures, so paying last year’s tax on time covers you even if 2026 turns out to be a better year.

For example, if the total tax on your 2025 return was $14,000 and your AGI was under $150,000, four on-time payments of $3,500 meet it. You still owe whatever the 2026 return says in April 2027, but that balance is due with the return, without the underpayment penalty for the year.

If your income comes in unevenly, the IRS says you may be able to avoid or lower the penalty by annualizing your income and making unequal payments. The method is in chapter 2 of IRS Publication 505, and the 2026 Form 1040-ES points to it when a large change in income after March 31 means you have to start paying. If you use it, you file Form 2210 with Schedule AI with your 2026 return, even if no penalty is owed.

What happens if you missed a payment

Missing a date does not lock you out, and a refund at filing time does not cancel the penalty for a late payment, according to the IRS. The underpayment penalty is figured on each underpayment for the number of days it remains unpaid. A late payment still cuts the penalty, because it stops the count of days. If you skipped the September payment, paying now costs less than waiting for January.

You can also make more than four payments. The rule is that the total you pay during each payment period has to be at least as much as the amount required by that period’s due date. That leaves room to send a fixed share of every settlement instead of four lump sums, as long as each period’s total reaches its required amount.

How to pay estimated tax

• IRS Online Account. Make a payment and see your payment history and balance at IRS.gov/Payments.
• IRS Direct Pay. A transfer from your checking or savings account at no cost, with no registration.
• EFTPS. The Electronic Federal Tax Payment System, with no fees, but you have to enroll first.
• Debit card, credit card or digital wallet. Available online or by phone, but processing fees go to the payment processor.
• Check or money order with the 1040-ES voucher. Possible, but the IRS asks you to consider the electronic options first.

Whatever method you use, keep the confirmation number with your books. The 1040-ES package includes a record table with a column for it next to each payment.

A quarterly routine that keeps the number honest

• Every week: record settlements, fuel, tolls and repairs, so profit is known and not estimated.
• Every month: move a set share of net income into a separate tax account.
• Two weeks before each due date: compare year-to-date profit with last year’s, and decide whether last year’s tax still covers you.
• On the due date or before: pay electronically and file the confirmation.
• Same calendar: IFTA returns are quarterly too, and the fuel records feed both.

Frequently asked questions

When is the next estimated tax payment due?

The last payment for tax year 2026 is due January 15, 2027. You can skip it if you file your 2026 return by February 1, 2027 and pay the full balance with it.

Do owner-operators have to pay quarterly taxes?

You do if you expect to owe at least $1,000 for 2026 after withholding and refundable credits, and your withholding and credits will be less than the smaller of 90% of your 2026 tax or 100% of your 2025 tax.

What is the self-employment tax rate for truck drivers?

It is 15.3%, made of 12.4% Social Security and 2.9% Medicare, applied to 92.35% of net profit. For 2026 the Social Security part applies to the first $184,500. Half of the tax is deductible.

How do I avoid the underpayment penalty?

Pay on time, through withholding and estimated payments, at least the smaller of 90% of your 2026 tax or 100% of your 2025 tax. Use 110% of the 2025 tax if your 2025 AGI was over $150,000, or $75,000 if married filing separately.

What if I missed the September payment?

Pay it as soon as you can. The penalty is figured on each underpayment for the number of days it stays unpaid, so an earlier payment means a smaller penalty.