Schedule IT-2210A

This article provides a complete guide to Indiana Schedule IT-2210A, used to calculate penalties for underpayment of estimated taxes by individuals with seasonal or uneven income. It includes a detailed explanation of what the form is, how to file it, and line-by-line instructions for accurate completion.

Indiana Schedule IT-2210A is an annualized income schedule designed for individuals with fluctuating or seasonal incomes, such as self-employed individuals, farmers, fishermen, or those receiving lump-sum payments. The form calculates whether you owe a penalty for underpayment of estimated taxes or if you qualify for an exception. Unlike the standard Schedule IT-2210, which assumes even income distribution throughout the year, Schedule IT-2210A allows taxpayers to annualize their income for each installment period to calculate estimated tax payments more accurately.

This form is particularly useful for those who earn the majority of their income in specific months (e.g., seasonal sales or bonuses). It breaks income into four specific periods (January–March, January–May, January–August, and the entire year) and calculates the tax liability for each period. By using Schedule IT-2210A, taxpayers can avoid penalties if they made timely payments coinciding with their income. Farmers and fishermen, however, follow different rules and may not need to file this schedule. Properly completing this form ensures compliance with Indiana tax laws while minimizing penalties.

How To File Indiana Schedule IT-2210A

  1. Determine Whether You Need To File the Form:
    • File Schedule IT-2210A if you have seasonal or uneven income and want to calculate your estimated tax penalty based on when you earned your income.
    • This form is especially helpful if you received lump-sum payments or had significant income changes throughout the year.
  2. Gather Required Documentation:
    • Your completed 2026 Form IT-40 or IT-40PNR.
    • Records of income earned and estimated tax payments made during each installment period.
    • Supporting documentation such as W-2s, 1099s, or proof of self-employment income.
  3. Attach Schedule IT-2210A to Your Tax Return:
    • Include the completed Schedule IT-2210A with your Form IT-40 or IT-40PNR when filing electronically or by mail.
    • Mark box “A” on Line 20a of Form IT-40 or IT-40PNR to indicate that you are using this form to calculate your underpayment penalty.
  4. Filing Deadline:
    • Submit Schedule IT-2210A by April 15, 2027, along with your tax return.
How To Complete Indiana Schedule IT 2210A

How To Complete Indiana Schedule IT-2210A

Section 1 – Early Filers

  1. Check the Box for Early Filing:
    • If you file your 2026 individual income tax return and pay the total tax due by February 2, 2027, you are exempt from making a fourth estimated tax payment. Check this box to indicate early filing.

Section 2 – Required Annual Payments

  1. Line A: 2026 Tax:
    • Add your state adjusted gross income tax and county income tax from Lines 8 and 9 of Form IT-40 or IT-40PNR. Include any recapture of Indiana credits and other applicable taxes. Enter the total amount here.
  2. Line B: 2026 Credits:
    • Add credits from Lines 5 through 12 of Indiana’s Schedule 5 or Schedule F, and any offset credits from Line 13 of Form IT-40 or IT-40PNR. Enter the total here.
  3. Line C: Subtract Line B From Line A:
    • Subtract the credits entered on Line B from the tax calculated on Line A.
  4. Line D: Multiply Line C by 90% (.90):
    • Calculate 90% of your total expected tax liability. Farmers and fishermen should multiply Line C by 66.7% (.667) instead.
  5. Line E: 2026 Withholding and PTET Credit:
    • Enter the total amount of state and county tax withholding and any pass-through entity tax (PTET) credits from Schedule 5 or Schedule F.
  6. Line F: Subtract Line E From Line C:
    • If the result is less than $1,000, you do not owe a penalty. Stop here, attach the form to your tax return, and indicate zero penalty.
  7. Line G: Prior Year’s Tax Exception:
    • Enter the total tax from your 2025 return if applicable. If your 2025 federal adjusted gross income exceeds $150,000 ($75,000 for married filing separately), multiply the prior year’s tax by 110% (1.10). If you did not file a 2025 return, write “N/A.”
  8. Line H: Minimum Required Annual Payment:
    • Enter the lesser of Line D or Line G. If Line G is “N/A,” use the amount from Line D. If this amount is less than or equal to Line E, you do not owe a penalty.

Section 3 – Annualized Method

Complete Lines 1 through 25 for each column (A–D) before moving to the next column.

  1. Line 1: 2026 Indiana Adjusted Income:
    • Enter your adjusted income for each period (January–March, January–May, January–August, and the entire year). Include income totals from all previous periods as applicable.
  2. Line 2: Annualization Amounts:
    • Multiply the income in Line 1 by the annualization factors: 4.0 (Column A), 2.4 (Column B), 1.5 (Column C), and 1.0 (Column D).
  3. Line 3: Annualized Income:
    • Multiply Line 1 by Line 2 for each column.
  4. Line 4: Exemptions:
    • Enter the total exemptions from Line 6 of Form IT-40 or IT-40PNR for each column.
  5. Line 5: Annualized State Taxable Income:
    • Subtract Line 4 from Line 3. If the result is negative, enter zero.
  6. Line 6: State Income Tax:
    • Multiply Line 5 by 3% (.03).
  7. Line 7: County Income Tax:
    • Multiply Line 5 by your county tax rate from Schedule CT-40 or CT-40PNR. Use applicable exemptions as necessary.
  8. Line 8: Annualized Total Tax:
    • Add Lines 6 and 7.
  9. Line 9: Credits:
    • Enter applicable credits from Indiana’s Schedule 5 or Schedule F for each column.
  10. Line 10: Annualized Tax Liability:
    • Subtract Line 9 from Line 8. If the result is less than zero, enter zero.
  11. Line 11: Installment Percentages:
    • Use the following percentages: 22.5% (.225) for Column A, 45% (.450) for Column B, 67.5% (.675) for Column C, and 90% (.900) for Column D.
  12. Line 12: Installment Amount Due:
    • Multiply Line 10 by Line 11 for each column.

Penalties and Final Calculations

  1. Line 25: Underpayment:
    • If your total payments (Line 23) are less than the required payment (Line 19), enter the difference here.
  2. Line 26: Total Underpayment:
    • Add the amounts from Line 25 for all columns and enter the total here.
  3. Line 27: Penalty Due:
    • Multiply Line 26 by 10% (.10) to calculate the penalty. Enter this amount on Line 20 of Form IT-40 or IT-40PNR.
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