If you work for yourself, drive for a rideshare company, or earn money on the side, the IRS expects a check four times a year — not once in April.
The next estimated tax deadline is September 15, and it catches a lot of people off guard.
When you have a regular job, your employer withholds taxes from every paycheck and sends that money to the government for you.
When you're self-employed or earning freelance income, nobody does that.
You're responsible for sending in your own money as you go.
Skip it, and you don't get a friendly reminder.
You get an underpayment penalty tacked onto your tax bill — currently around 7% interest, compounded daily, according to IRS rules.
That's a real cost on money you already spent.
A lot of people assume "estimated taxes" only apply to big businesses.
In reality, anyone who expects to owe $1,000 or more for the year generally needs to make these payments.
That includes gig workers, consultants, landlords, and people earning interest or dividends without withholding.
The IRS has a worksheet, but a rough shortcut works for many people: take what you owed last year, divide it by four, and pay that each quarter.
If your income jumped, you'll want to recalculate — otherwise you'll owe a lump sum next spring.
The good news is the payment itself takes about five minutes.
You can pay online through IRS Direct Pay, by phone, or by mail.
No account setup is required for Direct Pay, and you can schedule payments in advance.
One more thing worth knowing: if you also have a W-2 job, you can often avoid quarterly payments entirely by having extra tax withheld from your regular paycheck.
Just file a new W-4 with your employer and ask for additional withholding.
That's usually simpler than remembering four deadlines.
The four deadlines are April 15, June 15, September 15, and January 15 of the following year.
If a date falls on a weekend or holiday, it rolls to the next business day.
September 15 lands on a Monday this year, so there's no extra grace period.
If you've already missed a payment this year, don't panic and don't just ignore it.
The penalty is calculated on how long you're short, so paying late is still better than not paying at all.
You can also ask the IRS for a payment plan if the full amount isn't doable today.
The bigger takeaway is to build this into your budget like any other recurring bill.
Set aside roughly 25 to 30 percent of every freelance payment in a separate savings account, and the quarterly deadlines stop feeling like a surprise.
The people who get hurt most aren't the ones earning the least — they're the ones who spent the money without setting anything aside.
The bottom line: this system isn't designed to trap anyone, but it does punish people who don't plan.
If you're earning income without withholding, treat those four dates like rent.
Final Thoughts
Calendar them, automate them if you can, and keep the tax money somewhere you won't be tempted to touch.