Quarterly Tax Dates 2026–2027 and What Happens If You Miss One
The four estimated-payment dates aren't evenly spaced, and missing one doesn't doom you — the penalty is calculated per quarter, so catching up fast limits the damage. Size each payment with the quarterly tax calculator.
The four due dates
Q1 (Jan–Mar income): April 15, 2026. Q2 (Apr–May): June 15, 2026. Q3 (Jun–Aug): September 15, 2026. Q4 (Sep–Dec): January 15, 2027. Notice Q2 covers only two months while Q3 covers three — the quarters aren't equal.
How the underpayment penalty works
The IRS charges interest (around 8% annualized, set quarterly) on the shortfall for each quarter separately. Miss Q1 but pay extra in Q2, and you only owe the penalty for the Q1 gap period.
What to do right after a missed payment
Pay as soon as you can through IRS Direct Pay — every week of delay adds interest. Don't wait for the next quarter and don't skip the rest of the year; each quarter is scored on its own.
The safe-harbor escape hatch
Pay 100% of last year's total tax (110% if your AGI was over $150,000) or 90% of this year's tax, split across the quarters, and the penalty disappears even if you owe a balance at filing.
Irregular income? Use the annualized method
If most of your income lands late in the year, Form 2210's annualized income installment method lets you match payments to when you actually earned, reducing or removing penalties on early quarters.
Frequently asked questions
+Is there a grace period for quarterly payments?
No formal grace period — interest accrues from the due date. Paying within days keeps the cost to a few dollars.
+Can I pay all four quarters at once?
You can overpay early, but you can't skip early quarters and catch up at year-end without penalty unless you meet safe harbor.
+What if my income is unpredictable?
Pay based on each quarter's actual profit, or use the annualized method on Form 2210 at filing.
Ask about this article
Answers are grounded in “Quarterly Tax Dates 2026–2027 and What Happens If You Miss One”. Educational info, not tax advice.
About the author
Javed Niamat · Founder & Editor, GigTax
Javed Niamat founded GigTax to make self-employment tax math understandable for rideshare drivers, delivery couriers, creators and freelancers. He builds and maintains every calculator on this site and writes the guides that explain the numbers behind them.
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