Oklahoma Estimated Tax Payments Calculator

2026 rules

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

Your numbers

Filing status

Self-employment or business profit

W-2 wages

Other income (interest, dividends, gains, rental)

Oklahoma tax withheld from paychecks

Last year's Oklahoma 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

Oklahoma quarterly payment$681

Projected federal tax (incl. SE tax)$17,147
Projected Oklahoma tax$3,025
Oklahoma amount to pay in estimates$2,723
Oklahoma payment 1 · Apr 15, 2026$681
Oklahoma payment 2 · Jun 15, 2026$681
Oklahoma payment 3 · Sep 15, 2026$681
Oklahoma payment 4 · Jan 15, 2027$681
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$4,539

Oklahoma at a glance

Due dates: Apr 15, 2026, Jun 15, 2026, Sep 15, 2026, Jan 15, 2027
Rates: Oklahoma taxes income at 3 rates from 2.50% to 4.50%.

Oklahoma tax brackets for 2026

Single (taxable income)
Rate	Taxable income
2.50%	$3,750 – $4,900
3.50%	$4,900 – $7,200
4.50%	over $7,200

Married filing jointly
Rate	Taxable income
2.50%	$7,500 – $9,800
3.50%	$9,800 – $14,400
4.50%	over $14,400

Questions

When are Oklahoma estimated tax payments due for 2026?

Apr 15, 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 Oklahoma estimated-tax instructions too.