General Information
If you do not receive your income evenly throughout the year (for example, your income from a repair shop you operate
is much larger in the summer than it is during the rest of the year), your required estimated tax payment for one or more
periods may be less than the amount gured using the regular installment method.
To see if you can pay less for any period, complete the Annualized Estimated Tax Worksheet. (Note: You must rst com-
plete the regular “Tax Worksheet for Individuals” included on Form OW-8-ES.) This worksheet annualizes your tax at the
end of each period based on a reasonable estimate of your income, deductions, and other items relating to events that oc-
curred since the beginning of the tax year through the end of the period. Use the result you gure on line 24d of this form
to make your estimated tax payments and complete your payment vouchers.
The annualization method for Oklahoma estimated tax purposes is the same as that prescribed in the Internal Revenue
Code. The top of the worksheet shows the dates for each payment period. The periods build; meaning each period in-
cludes all previous periods. After the end of each payment period, complete the worksheet column for the period from the
beginning of the tax year through the end of that payment period to gure how much estimated tax to pay by the payment
due date for that period.
Line Instructions
Line 1: Enter your Oklahoma adjusted gross income for each period. This is your gross income, including your share
of partnership(s) or S-corporation(s) income or loss, for the period, minus your adjustments to income for that
period.
Line 6: Multiply line 4 by line 5 and enter the result on line 6.
Line 8: Enter the larger of line 6 or line 7 unless line 6 is less than the Federal standard deduction, then enter line
7. You do have the option to elect to itemize in each period. If you choose this option, enter “IE” next to the
amount.
Line 10: Add lines 8 and 9 and enter the result on line 10. If you had out-of-state income during the period you must rst
prorate your deductions and exemptions before entering the total on line 10. The method of proration will be
the same as used on Form 511 and can be found in the instructions of the individual income tax packet for the
previous tax year. Enter the prorated amount on line 10.
Line 11: Enter the full amount of the Adjustments to Oklahoma Adjusted Gross Income to which you would be entitled
based on either your annualized income or expenses incurred during the period. These are the deductions
and exclusions to which you are entitled to as adjustments from Oklahoma adjusted gross income to arrive at
Oklahoma taxable income. These adjustments include, but are not limited to, military pay exclusion, qualifying
disability deduction and qualied adoption expense. For a complete list of these adjustments, see the instruc-
tions for Form 511, Schedule 511-C or Form 511NR, Schedule 511NR-C found in the individual income tax
packet for the previous tax year.
Line 14: Include all the credits (other than withholding credits) you can claim because of events that occurred during
that period. Do not annualize any credit. However, when guring your credits, you must annualize any item of
income or deduction used to gure the credit. Also, include any credit(s) you are carrying over from a previous
year.
Line 24a: To avoid interest for underpayment you may want to enter on this line the amount from line 17, if line 20 is
smaller than line 17 and your line 18 is based on an estimate of your current year’s tax (the amount of which is
not certain).
Line 24c: Include all Oklahoma estimated tax payments actually made and Oklahoma income tax withholding through
the payment due date for the period. Your withholding is considered paid in four equal installments, one on the
due date of each payment period. To gure the amount to include on line 24c for each period, multiply your
total expected withholding for the current year by:
1) 25% (.25) for the rst period, 2) 50% (.50) for the second period,
3) 75% (.75) for the third period, or 4) 100% (1.00) for the fourth period.
NOTE: The following applies to part-year and nonresident taxpayers that will be ling Form 511NR. Lines 1 through 12
shall be calculated as if all income were earned in Oklahoma. Using the amount from line 12, calculate the tax; this is the
base tax and will be prorated for line 13. (If you qualify for the Oklahoma child care/child tax credit, reduce the amount
on line 12 by the Oklahoma child care/child tax credit before you calculate line 13; do not enter this credit on line 14.)
To calculate line 13, rst estimate your income from Oklahoma sources. Divide your income from Oklahoma sources by
the amount on line 1. Multiply this percentage by the base tax and enter the result on line 13. This is your “Tax from Tax
Table”. Complete the remainder of the form as directed.
Annualized Estimated Tax Worksheet
2019 Form OW-8-ES-SUP - Page 2
