By Income Tax Service Editorial — Reviewed by Diyan Yap, EA (IRS Enrolled Agent) — Updated July 19, 2026
Quick answer: 2026 federal estimated taxes are due April 15, June 15, and September 15, 2026, with the final payment due January 15, 2027. You’re generally safe from underpayment penalties if you pay in at least 90% of this year’s tax or 100% of last year’s (110% if your prior-year AGI topped $150,000). Two deadlines have passed — September 15 is the next one.
Key facts:
- 2026 due dates: April 15 · June 15 · September 15, 2026 · January 15, 2027
- Safe harbor: pay 90% of current-year tax OR 100% of prior-year tax (110% if prior-year AGI exceeded $150,000)
- Paid via Form 1040-ES vouchers or IRS online payment
- Self-employment tax runs 15.3% (12.4% Social Security up to the annual wage base + 2.9% Medicare) — estimates must cover it plus income tax
- Penalties accrue per quarter — a big January catch-up payment doesn’t erase missed earlier quarters
When are estimated taxes due in 2026?
| Payment | Covers income earned | Due date |
|---|---|---|
| Q1 | January 1 – March 31 | April 15, 2026 |
| Q2 | April 1 – May 31 | June 15, 2026 |
| Q3 | June 1 – August 31 | September 15, 2026 |
| Q4 | September 1 – December 31 | January 15, 2027 |
Note the quirks: the “quarters” aren’t equal — Q2 covers only two months — and the year’s last payment lands in January of 2027. If a due date falls on a weekend or holiday, it rolls to the next business day. As of mid-July 2026, the next deadline is September 15.
Who has to pay quarterly?
The tax system is pay-as-you-go: if no employer is withholding for you, you’re the withholding department. You generally need to make estimated payments if you expect to owe at least $1,000 beyond what withholding covers. The usual suspects:
- Self-employed people and gig workers — freelancers, contractors, rideshare and delivery drivers (your 1099-K reporting may have changed, but the tax on the income never did)
- S-corp owners taking distributions beyond their salaried withholding — see our S-corp guide
- Landlords with net rental profit
- Investors realizing meaningful capital gains, dividends, or interest
- Retirees whose pension/IRA withholding doesn’t cover their full liability
W-2 employees with a side income have a shortcut: increase job withholding via Form W-4 instead of making quarterly payments — withholding is treated as paid evenly through the year, which can retroactively fix an underpayment in a way January estimates can’t.
How do the safe-harbor rules work? (worked example)
Penalties disappear if you hit any safe harbor. The two that matter:
- 90% of the current year’s tax — precise but requires forecasting a moving target
- 100% of last year’s total tax — certain and known; 110% if last year’s AGI was over $150,000
Dev’s consulting income is climbing. Her 2025 return showed $22,000 of total tax, and her 2025 AGI was over $150,000:
- Her safe-harbor number: 110% × $22,000 = $24,200
- Quarterly: $24,200 ÷ 4 = $6,050 per deadline
- Even if 2026 turns out far better and her actual tax hits $40,000, equal on-time payments of $6,050 mean no underpayment penalty — the remaining balance is simply due with her return in April 2027
- If she’d rather not lend the IRS money in a down year, the 90%-of-actual route with quarterly recalculation fits better — more work, tighter cash
Rule of thumb: income rising → prior-year safe harbor is your friend; income falling → compute 90% of actual each quarter.
What happens if you miss a payment?
The underpayment penalty works like interest, computed per quarter from each due date until paid. Consequences worth knowing:
- Catch-up doesn’t cure the past. Paying double in September stops the Q3 meter but the Q1/Q2 meters already ran.
- Uneven income has a fix: the annualized income method (Form 2210) matches payments to when income actually arrived — the standard remedy for seasonal businesses and Q4 windfalls.
- The withholding trick: because withholding counts as evenly paid all year, a December increase in W-2 or retirement-distribution withholding can retroactively repair earlier quarters in a way an estimated payment can’t.
Missed April and June this year? Don’t spiral — pay the shortfall now rather than at the September deadline (the meter runs daily), then set the remaining two payments on schedule.
How do you calculate and pay?
- Estimate taxable income for 2026: business profit after expenses, then apply the 2026 brackets and standard deduction
- Add self-employment tax: 15.3% on net self-employment earnings (12.4% Social Security up to the annual wage base + 2.9% Medicare, which has no cap) — for many self-employed filers this rivals the income tax itself
- Subtract credits and any withholding, divide by four (or annualize)
- Pay: IRS Direct Pay / your IRS online account (fastest, instant confirmation), EFTPS, or mailed Form 1040-ES vouchers
- Keep confirmations — payment records prevent the classic “the IRS shows three payments, you remember four” headache
Don’t forget the state: most states with income taxes run their own estimated-payment system with their own dates and thresholds.
What should you do now?
- Mid-year checkpoint (this month): compare payments made against both safe harbors using actual January–June numbers. You have two deadlines left to correct course cheaply.
- New OBBBA deductions cut estimates too: the tips, overtime, and car-loan-interest deductions reduce expected tax — if they apply to you, your remaining quarterly payments may be smaller than your April assumptions.
- Set the two remaining dates as calendar alarms — September 15, 2026 and January 15, 2027 — with a one-week warning each.
- Lumpy income? Have an IRS Enrolled Agent set up the annualized method properly once; after that it’s a quarterly 15-minute update instead of an April penalty surprise.
FAQ
Are the estimated tax deadlines really not evenly spaced? Correct — Q2 covers just two months (due June 15) and Q4 covers four (due January 15, 2027). Budget cash flow around the actual calendar, not an assumed every-three-months rhythm.
Do I still owe estimated taxes if I won’t get a 1099 or 1099-K? Yes. Reporting thresholds control paperwork, not taxability — all self-employment and platform income is taxable when earned, forms or no forms.
Which safe harbor should I use if my income jumped this year? Usually prior-year: 100% (or 110% above $150,000 AGI) of last year’s tax is a fixed, known number that fully protects you, with the extra due at filing rather than quarterly.
Can my W-2 job’s withholding cover my side hustle? Yes — raise withholding on Form W-4. Withholding is treated as evenly paid across the year, making it the one tool that can retroactively fix missed quarters.
I skipped the June payment — should I wait for September 15? No. Pay the missed amount as soon as possible; the penalty accrues daily from the original due date. Then resume the normal schedule.
Does the January 15, 2027 payment go on my 2026 or 2027 taxes? 2026 — it’s the fourth installment for 2026 income, credited on the return you file in early 2027.
Sources
This article is for educational purposes only and is not tax, legal, or financial advice. Tax rules change and individual situations vary — consult a qualified tax professional about your specific circumstances.