When you were a company driver, an employer pulled taxes out of every check before you ever saw the money. Now that you own the truck, that job is yours. Miss it, and you'll owe a lump sum plus penalties in April.

Here's how quarterly estimated taxes actually work for a self-employed trucker, and how to stay ahead of them.

Why you pay four times a year

The IRS wants its money as you earn it, not once a year. Employees meet that requirement through paycheck withholding. As an owner-operator, no one withholds for you, so you send the IRS estimated payments yourself, four times a year.

You're covering two things:

  • Income tax on your net profit (what's left after business expenses).
  • Self-employment tax — roughly 15.3% covering Social Security and Medicare, the part an employer used to split with you.

That self-employment piece surprises a lot of new owner-operators. It's why setting aside enough matters.

The four due dates

Estimated taxes cover income in chunks. For a normal calendar year, the deadlines are:

  • Q1 (Jan 1 – Mar 31): due April 15
  • Q2 (Apr 1 – May 31): due June 15
  • Q3 (Jun 1 – Aug 31): due September 15
  • Q4 (Sep 1 – Dec 31): due January 15 of the next year

If a date lands on a weekend or holiday, it rolls to the next business day. Notice the quarters aren't even — Q2 is two months, Q4 is four. Mark them in your phone now so a due date never sneaks up while you're on a run.

How much to set aside from every settlement

The cleanest habit: treat taxes like a bill you owe on every settlement, not a surprise in April.

A common starting point is setting aside 25% to 30% of your net (revenue minus fuel, insurance, maintenance, plates, and other business costs) into a separate account you don't touch. Your real rate depends on your total income, deductions, and family situation, so treat that range as a floor to confirm with a tax pro.

A simple routine that works

  • Open a second bank account just for taxes.
  • Every time you get paid, move your set-aside percentage into it immediately.
  • Each quarter, pay the IRS from that account — online, by phone, or by mail with Form 1040-ES.
  • Keep every fuel receipt, repair invoice, and settlement statement. Deductions lower what you owe.

This is far easier when your pay is fast and predictable. With ARI's same-day pay and true 82% revenue share, you know your numbers early and can fund that tax account the same day the money hits — no waiting on a settlement cycle or losing 3–5% to quick-pay fees. Clean, consistent settlements also make bookkeeping and deductions much simpler at tax time.

What happens if you skip it

The IRS charges an underpayment penalty plus interest when you don't pay enough during the year. It's not a one-time fine — interest compounds until you catch up.

Worse is the cash-flow hit. Drivers who spend their full settlement all year often face a five-figure bill in April with nothing set aside. That's how good truckers end up borrowing to pay taxes, or falling behind on the truck. Paying quarterly keeps the number manageable and keeps you out of trouble.

Set your business up to make this easy

Quarterly taxes are just part of running your own trucking business — right alongside fuel strategy, plates, and settlements. We keep plain-English guides on all of it in our owner-operator resource center.

And the more stable and transparent your pay, the easier it is to set money aside on schedule. That predictability — same-day pay, no escrow, no hidden fees — is a big reason drivers lease on with ARI. See how the model works on our why join page, or call (888) 600-9098 to talk it through with a real person.