If you get a paycheck with taxes already taken out, you can skip this one.
Everyone else — freelancers, gig drivers, consultants, small business owners, and anyone earning money on the side — should probably keep reading.
The IRS doesn't wait until April to get paid, and the bill for missing that detail can sting.
When you work for an employer, taxes come out of each check automatically.
When you work for yourself, nobody does that for you.
So the government expects you to send in money four times a year through what are called estimated tax payments.
Miss them, and you can owe a penalty on top of the tax itself — even if you pay everything in full by the April filing deadline.
The remaining due dates this year land on September 15 and January 15.
If you missed earlier ones, you're not doomed.
You can often catch up by paying more at the next deadline, though the longer you wait, the more the penalty can build.
A common rule of thumb: if you expect to owe at least $1,000 in federal tax for the year, you should be making quarterly payments.
That catches a lot of people who don't think of themselves as business owners — someone with a weekend Etsy shop, a rideshare driver, a retiree with a side consulting gig, or a worker whose employer misclassified them as a contractor.
The good news is you don't have to guess at the amount.
The IRS has a worksheet, and most tax software will calculate it for you.
A simpler shortcut: look at what you owed last year and pay roughly the same in four chunks.
If your income is steady, that keeps you in safe territory.
If your income jumped, you may need to pay more to avoid a surprise.
The penalty itself isn't catastrophic for most people, but it's real money — often a few hundred dollars for a mid-level freelancer.
Think of it as an interest charge the government adds because you held onto money you owed.
It's calculated based on how much you underpaid and how long you waited, so it grows the longer you put it off.
Set aside a percentage of every payment you receive — many self-employed workers use 25% to 30% as a starting point and adjust later.
Open a separate savings account just for taxes so the money doesn't get spent.
And mark the September and January dates on your calendar now, because they don't line up with the April deadline most people have memorized.
If you're not sure whether you qualify, the safe answer is to check.
Owing a penalty because you didn't know the rule is one of the more avoidable money mistakes out there, and it hits people who are already juggling irregular income.
The tax system rewards people who plan and quietly penalizes people who don't.
If you earn money without an employer withholding it, spending twenty minutes on this now is worth far more than the penalty you'd pay for ignoring it.
Final Thoughts
Set the money aside, mark the date, and treat it like any other bill.