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Form 41ES — Worksheets
Business Income Tax Payments 2024

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 an Affected Business Entity Election payment before filing a return, use Form ABE-ES.
A. Business Estimated Tax Payments Worksheet
1. 2024 estimated Idaho taxable income ....................................................................................... 1.
2. Income tax on estimated Idaho taxable income. Multiply line 1 by 5.695% ............................... 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. 2024 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), the tax reimbursement incentive credit from the 2023 tax return,
and the ABE tax paid by another entity from Form 41S, line 61 or Form 65, line 57 ................. 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. Did you file a 2023 tax return? ................................................................................................... 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 2023 tax return ............................ 2.
3. 2024 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, tentative payments, and the ABE tax paid by another entity from
Form 41S, line 61 or Form 65, line 57......................................................................................... 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 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
EFO00026 08-29-2024

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                     Form 41ES — Instructions
                     Business Income Tax Payments

A. Business Estimated Tax Payments                     Estimated tax payments aren’t required on the 
Who Must Make Estimated Tax Payments                   tax due on income you report for individual 
A corporation must make estimated tax payments         shareholders.
to the Tax Commission if it’s required to make 
                                                       Computation of Estimated Tax Payments 
estimated tax payments to the Internal Revenue 
                                                       The Form 41ES worksheet allows you to compare the 
Service and will have an Idaho income tax liability 
                                                       income tax on last year’s return with the anticipated 
of $500 or more. Estimated tax payments aren’t 
                                                       income tax for the current year. Use the smaller of the 
required if the corporation wasn’t required to file an 
                                                       two amounts to determine the estimated tax payment 
Idaho return the previous tax year.
                                                       for each period. If your estimated tax payments are 
If you received personalized payment vouchers          based on 90% of the income tax required to be paid 
(Form 41EST), use the appropriate voucher              on the current year’s return and the anticipated income 
for each filing period. If any of the preprinted       tax for the current year is revised, use the revised 
information is incorrect, draw a line through it, and  amount to recompute any remaining estimated tax 
enter the correct information. Check the mailing       payments.
address change box on the voucher if there’s a 
change in your mailing address. If you don’t have      Due Dates 
a preprinted form, use the Form 41ES, available at     For calendar year taxpayers, estimated tax payments 
tax.idaho.gov.                                         are due by the 15th day of April, June, September, and 
                                                       December. For fiscal year taxpayers, estimated tax 
Estimated Tax Payments                                 payments are due by the 15th day of the 4th, 6th, 9th, 
Each estimated tax payment must be 25% of the          and 12th months of the tax year.
lesser of:
                                                       The due dates for the federal and Idaho estimated 
•  100% of the corporation’s income tax for 2023       tax payments are the same. If the due date is on a 
•  90% of its income tax for 2024                      Saturday, Sunday, or legal holiday, the payment is due 
Don’t include:                                         on the next regular business day.
•  Fuels tax due                                       Underpayment of Estimated Tax 
•  Sales/use tax due                                   Interest is due on the difference between the amount 
•  Fuels tax refunds                                   of estimated tax payment required to be made on 
• Tax from the recapture of qualified investment       each voucher and the amount of estimated tax 
  exemption (QIE)                                      payment actually made. Interest is computed from the 
                                                       due date of the estimated payment until the required 
•  The tax reimbursement incentive credit
                                                       amount is paid or until the due date of the return, 
•  ABE tax paid by another entity from Form 41S,       whichever comes first. The interest rate for 2024 is 
  line 61 or Form 65, line 57                          6%. The interest rate for 2025 is 6%.
For corporations, the tax required to be reported is   Use Form 41ESR to determine the amount of any 
defined as Idaho taxable income multiplied by the      underpayments of tax and interest due when you file 
appropriate tax rate, plus the permanent building      your return.
fund tax, plus tax from recapture of business 
income tax credits, minus allowable income             Overpayment of Estimated Tax 
tax credits. A corporation making estimated tax        If your estimated tax payments are more than the tax 
payments in a year following the revocation of         you owe, you’ll receive a refund after filing your return. 
subchapter S status will use $20 as the tax amount     You may apply all or part of the excess to next year’s 
required to be reported on the prior year’s return.    estimated tax by designating the amount on Form 41, 
                                                       Idaho Corporation Income Tax Return or Form 41S, 
For S corporations, estimated tax payments are 
                                                       S Corporation Income Tax Return.
computed on the Idaho tax due to net recognized 
built-in gains and excess net passive income. 

EIN00073  08-29-2024                                                                               Page 1 of 2

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Form 41ES — Instructions (continued)

Overpayments will be applied to any prior year at tax.idaho.gov/penalties. Interest accrues
tax debt before carryovers or refunds are allowed. on any balance of tax due on the return when
You’ll be notified if your overpayment is applied to it’s filed until it’s paid in full.
an existing debt or is used to reduce your refund or
carryover. Corporations
Multiply 5.695% by the estimated taxable income. If
Annualized Income and Estimated Tax Payments the amount is less than $20, use $20 as the estimated
If your estimated tax payments are based on tax. Add the $10 permanent building fund tax to
annualized income for federal purposes, you can the estimated income tax, and subtract the amount
use that same method for making Idaho estimated estimated for income tax credits.
tax payments. Calculate the estimated tax due for
the installment period by multiplying the applicable S Corporations
percentage (22.5%, 45%, 67.5%, and 90% for the S corporations are taxed on excess net passive
1st, 2nd, 3rd, and 4th installments, respectively) by income and net recognized built-in gains. Use 5.695%
the full year’s tax on the annualized income for the to compute the estimated tax on this income. If the
period and deducting any prior installments. estimated tax on these items is less than $20 or the
S corporation doesn’t report income from these items,
Short Tax Year use $20 as the estimated tax.
If the short tax year ends before any remaining
due dates, you must make a final estimated tax S Corporations, Partnerships, Trusts, and
payment by the 15th day of the last month of Estates with Individual Shareholders, Partners,
the short tax year. You aren’t required to make and Beneficiaries
an estimated tax payment if the short tax year is If the income is reported and the tax paid for the
less than four months or if you haven’t met the individual shareholders, partners, or beneficiaries,
requirements to make an estimated tax payment use 5.695% to compute the estimated tax. This is in
before the first day of the last month in the short tax addition to the tax computed for the S corporation,
year. partnership, trust, or estate. Add the $10 permanent
building fund tax for each individual not filing an Idaho
B. Business Extension of Time Payments individual income tax return. Add the $10 permanent
building fund tax for each nonresident individual owner
General Information
included in the affected business entity return.
If you can’t file your Idaho return by the due date,
you’ll be allowed an automatic six-month extension Trusts and Estates
of time to file without sending a written request. To Add the permanent building fund tax to the computed
qualify you must pay at least: tax unless all income is distributed to beneficiaries or if
• 80% of the 2024 income tax liability, or the trust is a qualified funeral trust.
• 100% of the total income tax reported on the
2023 income tax return Other Payments
If you’ll owe $50 or less, a payment isn’t required; QIE Recapture Payment
You also can use Form 41ES to make payments of
however, interest will accrue.
QIE recapture when you file your income tax return
Paying less than the required amount will result after the due date. Include a copy of Form 49ER.
in a penalty. We’ll charge a penalty if you pay the
required amount but don’t pay the remainder of
the tax due by the extended due date. To avoid
a penalty, pay online or mail your payment by
April 15. For more information or to calculate
a penalty, see our Interest and Penalties page

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 08-29-2024 Page 2 of 2

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