If you earn money without an employer withholding taxes for you, the IRS expects a payment four times a year.
The next estimated tax deadline is September 15, and it catches a lot of people off guard because nobody deducts anything from a freelance check, a gig payout, or a side hustle deposit.
You generally need to make estimated payments if you expect to owe at least $1,000 in federal tax for the year.
That covers freelancers, rideshare drivers, Etsy sellers, consultants, and plenty of people with a regular job who also pull in extra income on the side.
The rule of thumb is to pay either 90% of what you'll owe this year or 100% of what you owed last year, whichever is smaller.
If your income jumped this year, the prior-year figure can be a safer target because it protects you from a surprise underpayment penalty even if this year runs hotter than expected.
Where people get tripped up is forgetting the self-employment tax.
Beyond regular income tax, you owe 15.3% to cover Social Security and Medicare, which an employer would normally split with you.
That number alone can turn a modest side income into a real tax bill, so it's worth setting aside roughly 25% to 30% of each payment you receive.
The good news is that the mechanics are simple.
You can pay online through IRS Direct Pay or your IRS online account in a few minutes, and there's no fee for a bank transfer.
You pick the tax year, choose estimated tax as the reason, and you're done.
No forms to mail unless you prefer paper.
If you miss the September date, don't panic and don't skip it.
The penalty is based on how long and how much you're short, and it grows the longer you wait, but catching up early limits the damage.
You can also ask your tax preparer to adjust your January payment to close the gap.
One move that helps a lot of people is increasing withholding at a regular job instead of making quarterly payments.
Withholding is treated as paid evenly throughout the year, so bumping it up can erase an underpayment problem without you having to remember four separate deadlines.
Set a calendar reminder for the remaining dates: September 15 and January 15.
If your income is unpredictable, a separate savings account for taxes keeps the money out of reach so it's actually there when the bill comes due. **Our take:** Estimated taxes aren't a punishment, they're just the bill for being your own payroll department.
Final Thoughts
Pay a little each quarter, keep the money in its own account, and tax season stops being a crisis.