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Form 41ES — Worksheets
Business Income Tax Payments
Use the worksheet in Part A to compute your business estimated tax payments.
Use the worksheet in Part B to determine if you need to make an extension of time payment.
If you’re making a Form ABE, Affected Business Entity Election payment before filing a return, use the voucher below.
A. Business Estimated Tax Payments Worksheet
1. 2023 estimated Idaho taxable income ....................................................................................... 1.
2. Income tax on estimated Idaho taxable income. Multiply line 1 by 5.8% ................................... 2.
3. Permanent building fund tax ($10 or, if a combined report, multiply $10 by the number
of corporations required to file an Idaho income tax return) ...................................................... 3.
4. Tax from recapture of business income tax credits. See Form 44, Part II, for a complete list ... 4.
5. Total income tax. Add lines 2 through 4 ..................................................................................... 5.
6. Estimated income tax credits ..................................................................................................... 6.
7. 2023 estimated income taxes payable. Line 5 minus line 6 ...................................................... 7.
(If the amount is less than $500, stop here. You aren’t required to make estimated tax payments.)
8. Multiply line 7 by 90% ................................................................................................................ 8.
9. Idaho total tax less the total of the fuels tax, sales/use tax, tax from recapture of
qualified investment exemption (QIE), and the tax reimbursement incentive credit
from the 2022 tax return ............................................................................................................ 9.
10. Estimated tax payments. Multiply the smaller of lines 8 or 9 by 25%. This is the
amount of each estimated tax payment ..................................................................................... 10.

B. Extension of Time Payment Worksheet Yes No
1. Was a tax return filed last year? ................................................................................................. 1.
2. If yes, enter the total tax less the total of the fuels tax, sales/use tax, tax from recapture
of QIE, and the tax reimbursement incentive credit from the 2022 tax return ............................ 2.
3. 2023 estimated income tax due less estimated income tax credits. (Estimated tax due
includes the $20 minimum tax, the $10 permanent building fund tax, and tax from recapture
of business income tax credits.) See instructions ...................................................................... 3.
4. Multiply line 3 by 80% ................................................................................................................ 4.
5. If you answered yes to the question on line 1, enter the smaller amount from line 2 or 4.
If you answered no, enter the amount from line 4 ...................................................................... 5.
6. Estimated tax payments and tentative payments ...................................................................... 6.
7. Payment. Line 5 minus line 6. If $50 or less, a payment isn’t required ..................................... 7.
Pay online at tax.idaho.gov/epay (don’t send voucher). Sending check and/or money order? Use voucher below.

Mail to:
Form 41ES — Voucher Idaho State Tax Commission
Estimated Tax Payment/Extension of Time Payment/ABE Payment PO Box 83784
Business Income Tax Boise ID 83707-3784
Mo Day Year Mo Day Year
For calendar year , or fiscal year beginning ending
Business name Federal Employer Identification Number (EIN)

Current business mailing address Tax code
05
City State ZIP Code Tran code
10
Name/address change? Combined report? Amount paid
Yes No Yes No $ .00
Type of Payment Type of Return to be Filed
1 Estimated Tax 3 Qualified Investment Exemption (QIE) 1 Corporation - Form 41 3 Fiduciary - Form 66
2 Extension of Time 4 Affected Business Entity Election (ABE) 2 S Corporation - Form 41S 4 Partnership - Form 65
EFO00026 09-08-2023

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Form 41ES — Instructions
Business Income Tax Payments

A. Business Estimated Tax Payments Computation of Estimated Tax Payments
Who Must Make Estimated Tax Payments The Form 41ES worksheet allows you to compare the
A corporation must make estimated tax payments income tax on last year’s return with the anticipated
to the Tax Commission if it’s required to make income tax for the current year. Use the smaller of the
estimated tax payments to the Internal Revenue two amounts to determine the estimated tax payment
Service and will have an Idaho income tax liability for each period. If your estimated tax payments are
of $500 or more. Estimated tax payments aren’t based on 90% of the income tax required to be paid
required if the corporation wasn’t required to file an on the current year’s return and the anticipated income
Idaho return the previous tax year. tax for the current year is revised, use the revised
amount to recompute any remaining estimated tax
If you received personalized payment vouchers
payments.
(Form 41EST), use the appropriate voucher
for each filing period. If any of the preprinted Due Dates
information is incorrect, draw a line through it, and For calendar year taxpayers, estimated tax payments
enter the correct information. Check the mailing are due by the 15th day of April, June, September, and
address change box on the voucher if there’s a December. For fiscal year taxpayers, estimated tax
change in your mailing address. If you don’t have payments are due by the 15th day of the 4th, 6th, 9th,
a preprinted form, use the Form 41ES, available at and 12th months of the tax year.
tax.idaho.gov.
The due dates for the federal and Idaho estimated
Estimated Tax Payments tax payments are the same. If the due date is on a
Each estimated tax payment must be 25% of the Saturday, Sunday, or legal holiday, the payment is due
lesser of: on the next regular business day.
• 100% of the corporation’s income tax for 2022
Underpayment of Estimated Tax
• 90% of its income tax for 2023 Interest is due on the difference between the amount
Don’t include: of estimated tax payment required to be made on
each voucher and the amount of estimated tax
• Fuels tax due
payment actually made. Interest is computed from the
• Sales/use tax due due date of the estimated payment until the required
• Fuels tax refunds amount is paid or until the due date of the return,
• Tax from the recapture of qualified investment whichever comes first. The interest rate for 2023 is
exemption (QIE), or 5%. The interest rate for 2024 is 6%.
• The tax reimbursement incentive credit Use Form 41ESR to determine the amount of any
For corporations, the tax required to be reported is underpayments of tax and interest due when you file
defined as Idaho taxable income multiplied by the your return.
appropriate tax rate, plus the permanent building
Overpayment of Estimated Tax
fund tax, plus tax from recapture of business
If your estimated tax payments are more than the tax
income tax credits, minus allowable income
you owe, you’ll receive a refund after filing your return.
tax credits. A corporation making estimated tax
You may apply all or part of the excess to next year’s
payments in a year following the revocation of
estimated tax by designating the amount on Form 41,
subchapter S status will use $20 as the tax amount
Idaho Corporation Income Tax Return or Form 41S,
required to be reported on the prior year’s return.
S Corporation Income Tax Return.
For S corporations, estimated tax payments are
computed on the Idaho tax due to net recognized Overpayments will be applied to any prior year
built-in gains and excess net passive income. tax debt before carryovers or refunds are allowed.
Estimated tax payments aren’t required on the You’ll be notified if your overpayment is applied to
tax due on income you report for individual an existing debt or is used to reduce your refund or
shareholders. carryover.

EIN00073 09-08-2023 Page 1 of 2

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                                                                    Form 41ES — Instructions      (continued)

Annualized Income and Estimated Tax Payments            Corporations
If your estimated tax payments are based on             Multiply 5.8% by the estimated taxable income. If the 
annualized income for federal purposes, you can         amount is less than $20, use $20 as the estimated 
use that same method for making Idaho estimated         tax. Add the $10 permanent building fund tax to 
tax payments. Calculate the estimated tax due for       the estimated income tax, and subtract the amount 
the installment period by multiplying the applicable    estimated for income tax credits.
percentage (22.5%, 45%, 67.5%, and 90% for the 
1st, 2nd, 3rd, and 4th installments, respectively) by   S Corporations
the full year’s tax on the annualized income for the    S corporations are taxed on excess net passive 
period and deducting any prior installments.            income and net recognized built-in gains. Use 5.8% 
                                                        to compute the estimated tax on this income. If the 
Short Tax Year                                          estimated tax on these items is less than $20 or the 
If the short tax year ends before any remaining         S corporation doesn’t report income from these items, 
due dates, you must make a final estimated tax          use $20 as the estimated tax.
payment by the 15th day of the last month of 
the short tax year. You aren’t required to make         S Corporations, Partnerships, Trusts, and 
an estimated tax payment if the short tax year is       Estates with Individual Shareholders, Partners, 
less than four months or if you haven’t met the         and Beneficiaries
requirements to make an estimated tax payment           If the income is reported and the tax paid for the 
before the first day of the last month in the short tax individual shareholders, partners, or beneficiaries, 
year.                                                   use 5.8% to compute the estimated tax. This is in 
                                                        addition to the tax computed for the S corporation, 
B. Business Extension of Time Payments                  partnership, trust, or estate. Add the $10 permanent 
                                                        building fund tax for each individual not filing an Idaho 
General Information
                                                        individual income tax return. Add the $10 permanent 
If you can’t file your Idaho return by the due date, 
                                                        building fund tax for each nonresident individual owner 
you’ll be allowed an automatic six-month extension 
                                                        included in the affected business entity return.
of time to file without sending a written request. To 
qualify you must pay at least:                          Trusts and Estates
•  80% of the 2023 income tax liability, or             Add the permanent building fund tax to the computed 
•  100% of the total income tax reported on the         tax unless all income is distributed to beneficiaries or if 
   2022 income tax return                               the trust is a qualified funeral trust.
If you’ll owe $50 or less, a payment isn’t required; 
                                                        Other Payments
however, interest will accrue.
                                                        QIE Recapture Payment
Paying less than the required amount will               You also can use Form 41ES to make payments of 
result in a penalty. We’ll charge a penalty if          QIE recapture when you file your income tax return 
you pay the required amount but don’t pay the           after the due date. Check the QIE box at the bottom of 
remainder of the tax due by the extended due            the form, and return it with your check. Include a copy 
date. For more information or to calculate a            of Form 49ER.
penalty, see our Penalties and Interest page 
at tax.idaho.gov/penalties. Interest accrues            ABE Payment
on any balance of tax due on the return when            You can use Form 41ES to make ABE payments. 
it’s filed until it’s paid in full.                     Check the ABE box at the bottom of the form and 
                                                        return it with your check.

                                                  Contact us:
                     In the Boise area: (208) 334-7660 | Toll free: (800) 972-7660
                                    Hearing impaired (TDD) (800) 377-3529
                                               tax.idaho.gov/contact
EIN00073 09-08-2023                                                                                Page 2 of 2

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