If you made money this year without an employer withholding it, the IRS expects a check four times a year, and one of those deadlines is closer than most people think.
Freelancers, gig drivers, contractors, and anyone with a side hustle are on the hook for estimated tax payments, and skipping them doesn't make the bill disappear.
It just adds penalties and interest on top.
When you work a regular job, taxes come out of every paycheck before you ever see the money.
When you're self-employed, nobody does that for you.
You're responsible for income tax plus self-employment tax, which covers Social Security and Medicare.
That's often 15.3% right there, before federal income tax even enters the picture.
The rule of thumb is to pay taxes as you earn the money, not in one lump sum the following April.
The IRS generally wants you to cover at least 90% of what you'll owe for the year, or 100% of last year's total, whichever is smaller.
Miss that mark and the underpayment penalty starts stacking up, even if you pay everything off by the filing deadline.
The dates matter more than people realize.
Payments are typically due in mid-April, mid-June, mid-September, and mid-January of the following year.
Each one covers income from a specific stretch of months, so if you had a huge spring and a slow summer, your payments don't have to be identical.
You can adjust each one based on what you actually earned.
A lot of workers get surprised by how much they owe because they only set aside money for income tax.
They forget the self-employment portion, plus state taxes if their state has an income tax.
A freelancer who clears $60,000 might owe well over $10,000 between federal and state, and that's money that should have been set aside month by month, not discovered in March.
The simplest fix is to open a separate savings account and move a percentage of every payment you receive into it.
Many self-employed workers set aside 25% to 30% of each deposit.
It's not a perfect science, but it's a lot better than scrambling when the deadline hits.
If your income is unpredictable, you have options.
You can use the safe harbor of paying 100% of last year's tax liability in equal installments, which protects you from penalties even if this year turns out bigger.
You can also increase withholding at a day job to cover side income, or make a lump payment before the deadline if you had a strong quarter.
You can pay through the IRS Direct Pay system, your IRS online account, or by mail with a voucher.
Most tax software walks you through calculating each installment.
It's remembering that the money sitting in your account isn't all yours.
Ignore the deadlines and the penalty is calculated on the amount you underpaid, accruing daily until you settle up.
It's not catastrophic for small amounts, but it compounds fast for anyone who owes thousands.
The IRS doesn't care that you were busy or that you planned to deal with it later.
My take: estimated taxes are one of the least glamorous parts of self-employment, and that's exactly why so many people put them off until the penalty notice shows up.
Setting aside a slice of every payment takes ten minutes to arrange and saves a world of stress.
Final Thoughts
If you're earning without withholding, treat this as a bill you pay yourself, not a surprise you open in April.