Delaware Estimated Tax Payments Calculator

2026 rules

Enter your expected income to see what to send Delaware and the IRS each quarter.

Your numbers

Filing status

Self-employment or business profit

W-2 wages

Other income (interest, dividends, gains, rental)

Delaware tax withheld from paychecks

Last year's Delaware tax (total on your return)

Leave at 0 to use this year's estimate only.

Federal tax withheld

Last year's federal tax (Form 1040 line 24)

Result

Delaware quarterly payment$877

Projected federal tax (incl. SE tax)$17,147
Projected Delaware tax$3,896
Delaware amount to pay in estimates$3,506
Delaware payment 1 · Apr 30, 2026$877
Delaware payment 2 · Jun 15, 2026$877
Delaware payment 3 · Sep 15, 2026$877
Delaware payment 4 · Jan 15, 2027$877
Federal amount to pay in estimates$15,433
Federal payment · Apr 15, 2026$3,858
Federal payment · Jun 15, 2026$3,858
Federal payment · Sep 15, 2026$3,858
Federal payment · Jan 15, 2027$3,858
First payment, state and federal$4,735

Delaware at a glance

Due dates: Apr 30, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027
Rates: Delaware taxes income at 6 rates from 2.20% to 6.60%.

Delaware tax brackets for 2026

All filers (taxable income)
Rate	Taxable income
2.20%	$2,000 – $5,000
3.90%	$5,000 – $10,000
4.80%	$10,000 – $20,000
5.20%	$20,000 – $25,000
5.55%	$25,000 – $60,000
6.60%	over $60,000

Questions

When are Delaware estimated tax payments due for 2026?

Apr 30, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027.

How much do I need to pay to avoid a penalty?

This calculator uses the federal safe harbor: 90% of this year's tax, or 100% of last year's (110% if your AGI is over $150,000), less withholding. A few states use a different share of the current year's tax, so check the Delaware estimated-tax instructions too.