But if you're self-employed, a freelancer, a gig worker, or you earn money from investments or a side hustle, the IRS doesn't wait until April to collect.
It expects payment four times a year, and missing those deadlines can trigger penalties that quietly pile up.
The next estimated tax deadline is September 15.
If you earned income this year that didn't have taxes withheld, that date matters more than you might think.
When you work a regular job, your employer withholds taxes from every paycheck and sends them to the government.
When you work for yourself, nobody does that for you.
So the IRS wants you to send in payments roughly every three months to cover what you'll owe.
That covers income tax and self-employment tax, which handles Social Security and Medicare.
You can base them on your expected income for the year, or you can use last year's tax bill as a guide.
The IRS generally wants you to pay at least 90% of what you'll owe this year, or 100% of what you owed last year, whichever is smaller.
Miss that target and you could face an underpayment penalty, which is essentially interest on the money you should have sent in earlier.
The rule of thumb is if you expect to owe at least $1,000 when you file your return, you probably need to make estimated payments.
That catches a lot more people than you'd guess, including rideshare drivers, Etsy sellers, consultants, and anyone collecting significant dividends, rent, or freelance income.
The tricky part is that income is unpredictable.
A slow quarter can throw off your estimates, and a surprisingly good month can mean you owe more than you set aside.
That's why some people simply pay based on last year's numbers and adjust at tax time.
Others use an annualized method, which lets you match payments to when the income actually arrived.
One is to increase withholding on a regular paycheck if you also have a W-2 job, since withholding is treated more leniently than estimated payments.
Another is to set aside a percentage of every payment you receive into a separate savings account so the money is there when a deadline hits.
Some people schedule automatic transfers to the IRS through their online account to avoid late scrambles.
The deadlines themselves are easy to forget because they don't line up with the April filing date.
They generally fall in mid-April, mid-June, mid-September, and mid-January of the following year.
If a due date lands on a weekend or holiday, it shifts to the next business day.
One more thing worth checking: state rules don't always match federal ones.
Many states with income tax have their own estimated payment schedules and thresholds, so a payment that satisfies the IRS might not satisfy your state.
The takeaway here isn't to fear the quarterly bill, it's to plan for it.
Estimated taxes aren't a penalty aimed at freelancers, they're just the system catching up to how you get paid.
Final Thoughts
Set aside the money early, keep decent records, and the September deadline becomes a routine transfer instead of a nasty surprise.