Quarterly estimated taxes are payments you make to the IRS four times a year to cover the income and self-employment tax that no employer is withholding for you. If you expect to owe 1,000 dollars or more for the year, you are generally required to pay them. The 2026 deadlines fall on April 15, June 15, September 15, and January 15, 2027.
That is the whole concept in one paragraph. Now here is what it actually means for your money, and how to stop dreading it.
Why quarterly taxes even exist
The US tax system is pay-as-you-go. The government wants its share as you earn, not in one payment at the end of the year. When you had a W-2 job, this happened invisibly. Your employer withheld tax from every paycheck and sent it in for you.
When you went independent, that withholding disappeared. The full payment now lands in your account, and the IRS still expects its cut on roughly the same schedule. Quarterly estimated payments are simply you doing the job your employer used to do, four times a year instead of every two weeks.
Who actually has to pay
You generally need to make estimated payments if you expect to owe at least 1,000 dollars in tax for the year after subtracting any withholding. For most full-time independent earners, that threshold is crossed quickly.
If you also have a W-2 job alongside your 1099 work, or your spouse does, you have another option. You can increase the withholding on that paycheck to cover the self-employment income, which can reduce or eliminate the need to send separate quarterly checks. For everyone living entirely on independent income, quarterly payments are part of the job.
The four 2026 deadlines
Estimated taxes are due four times a year, and the periods are not even three-month blocks, which trips people up. Here are the 2026 dates:
- First quarter: April 15, 2026
- Second quarter: June 15, 2026
- Third quarter: September 15, 2026
- Fourth quarter: January 15, 2027
If a deadline lands on a weekend or holiday, it shifts to the next business day. Put all four in your calendar now, with a reminder a week ahead so you have time to move the money.
How much to pay each quarter
The simplest approach is to take your expected total tax for the year and divide it into four. But most independent earners do not know that number in January, and income is rarely even across the year.
This is where the safe harbor rule becomes your friend. You can avoid an underpayment penalty if you pay, across the year, either 90 percent of what you end up owing for the current year, or 100 percent of what you owed last year (110 percent if your adjusted gross income was over 150,000 dollars). Paying based on last year's number is the safest play, because you already know it, and it protects you even if this year turns out bigger.
In practice, that 25 to 30 percent you should already be setting aside from every payment becomes your quarterly check. The set-aside and the payment are the same money. You are just holding it briefly, then sending it in on the deadline.
How to actually send it
You pay using Form 1040-ES, but you do not need to mail anything. The fastest route is IRS Direct Pay, which pulls straight from your bank account at no charge, or EFTPS, the government's free electronic payment system. Most people use Direct Pay, save the confirmation, and move on.
Remember that many states with income tax want their own quarterly estimates too, on their own forms. If you live in a state like California or New York, budget for both the federal and the state payment.
What happens if you skip them
Missing quarterly payments does not mean the IRS comes after you mid-year. What it means is a penalty, calculated like interest on the amount you should have paid and did not, charged even if you pay your full balance in April. The penalty is not enormous on a single missed quarter, but it is pure waste, money you owe for being late rather than for anything you actually earned. Paying on schedule is the only way to keep that number at zero.
How Sumly handles it
The hard part of quarterly taxes is not sending the payment. It is knowing what you owe, on a profit number that is always moving as new income and expenses come in.
Sumly keeps the money side of your independent work in one place. Income gets organized and expenses get categorized as they happen, so your real profit, the number your tax is actually based on, stays current instead of getting reconstructed in a panic before each deadline. When a quarterly date approaches, you are working from a live picture, not a guess.
And because Sumly is backed by in-house licensed tax professionals, the estimates you plan around reflect real tax rules and your real situation, not a generic one-size formula. That is the difference between a calculator that spits out a number and a system with actual tax expertise behind it.
You do not have to become your own payroll department. You just need the separation to keep happening as the money moves, so each deadline is a two-minute task instead of a weekend of dread.
Find your number for this quarter
The next federal deadline is June 15. The fastest way to know what to send is to run your actual numbers rather than guess.
Estimate your quarterly payment with the Sumly tax calculator, then set a reminder for each of the four 2026 dates. Four small, predictable payments will always beat one large, scary one.
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