When are quarterly taxes due in 2026?

April 15, June 16, September 15, 2026, and January 15, 2027. Payments postmarked by the deadline are on time.

How do I avoid underpayment penalties?

Pay at least 90% of current year tax or 100% of prior year tax (110% if AGI > $150K) through withholding and quarterly estimates combined.

What happens if I miss a quarterly payment?

The IRS charges interest on underpayments at 8% annually (2026). Even partial payments reduce your penalty. Pay as soon as possible.

When are quarterly taxes due?

April 15, June 15, September 15, and January 15 of the following year.

How do I avoid underpayment penalties?

Pay at least 90% of current year tax or 100% of prior year tax (110% if AGI > $150K).

Can I make unequal quarterly payments?

Yes. Use the Annualized Income Installment Method (Form 2210) if your income varies during the year.

Quarterly Tax Calculator 2026

Estimate your 1040-ES quarterly tax payments. Avoid IRS underpayment penalties.

Annual Gross Income ($)

Business Expenses ($)

State

Prior Year Tax ($)

Estimated Annual Tax

$13,309.23

Your Quarterly Payment Schedule

Q1Due by April 15, 2026, 2026

$2,994.58

Q2Due by June 16, 2026, 2026

$2,994.58

Q3Due by September 15, 2026, 2026

$2,994.58

Q4Due by January 15, 2027, 2026

$2,994.58

Safe Harbor: Your payments meet IRS safe harbor requirements using the 90% of current year tax method. You should not face underpayment penalties.