Alabama Form 40ES – Estimated Individual Income Tax Voucher
Last reviewed: 2025-11-12
Use the Alabama Tax Form Calculator Form AL-40ES: Alabama Form 40ES – Estimated Individual Income Tax Voucher as a stand alone tax form calculator to quickly calculate specific amounts for your 2026 Alabama state tax return. Alternatively, you can use one of our Combined Federal and State Tax Estimators to quickly calculate your salary, tax, and take-home pay.
Form AL-40ES, titled “Declaration of Estimated Tax / Voucher”, is used by Alabama individual taxpayers to declare and pay quarterly estimated income taxes for the upcoming tax year. According to the Alabama Department of Revenue (ADOR), you must file Form 40ES if you anticipate owing at least $500 in state income tax after withholding and credits, and expect your withholding and credits to be less than the smaller of 90 % of the coming year’s tax or 100 % of the prior year’s tax (110 % for high-income filers).
Estimated payments ensure that your tax is paid progressively throughout the year, reducing the risk of large year-end balances and underpayment penalties. These payments operate similarly to the federal Form 1040-ES system, with Alabama-specific rules and due dates.
How to Complete Alabama Form 40ES
- Determine if you must file: You generally need to make estimated payments if you expect to owe $500 or more after subtracting withholding and credits, and your withholding/credits are less than 90 % of your current-year tax or 100 % (110 % for higher earners) of your previous-year tax.
- Enter taxpayer information: Provide your Social Security Number, spouse’s SSN if filing jointly, full names, and address. Check the fiscal-year box if applicable.
- Estimate your taxable income: Use ADOR worksheets to calculate your expected adjusted gross income, deductions, exemptions, and tax credits. Subtract withholding and credits carried forward.
- Compute installment payments: Divide your total estimated tax due into four payments, due on April 15, June 15, September 15, and January 15 of the following year. If you start mid-year, divide the remaining tax across the remaining vouchers.
- Mail each voucher with payment: Detach the appropriate voucher and mail it with your check or money order payable to the Alabama Department of Revenue, P.O. Box 327485, Montgomery AL 36132-7485.
Self-employed individuals, landlords, investors, or others with non-withheld income should review their estimated obligations regularly to prevent penalties.
| TAXPAYER INFORMATION | ||
| 1 | Primary taxpayer’s Social Security Number | |
| 2 | Spouse’s Social Security Number (if joint) | |
| 3 | Taxpayer name(s) | |
| 4 | Mailing address (street, city, state & ZIP code) | |
| 5 | Check here if you are filing a fiscal-year voucher | |
| 6 | Beginning date of fiscal year (if applicable) | |
| 7 | Ending date of fiscal year (if applicable) | |
| 8 | Vendor code (if applicable) | |
| 9 | Estimated Alabama income tax (Worksheet line 11) | |
| 10 | Amount of Alabama income tax you estimate will be withheld from your wages | |
| 11 | Estimated tax due (line 9 minus line 10) | |
| 12 | Amount you are paying with this voucher | |
Key Deadlines for 2026 Estimated Payments
- April 15, 2026
- June 15, 2026
- September 15, 2026
- January 15, 2027
If a due date falls on a weekend or state holiday, the next business day applies.
Understanding Underpayment Penalties
Failing to meet Alabama’s estimated tax thresholds can result in penalties. The ADOR safe-harbor rule allows you to avoid penalties if your payments equal at least 90 % of the current year’s tax or 100 % (110 % for higher income) of the previous year’s total. Use the underpayment worksheet in the ADOR instructions to verify compliance.
Who Should Pay Estimated Tax?
You should pay quarterly estimates if you:
- Have income not subject to withholding (self-employment, rental, or investment income).
- Operate a business or partnership without automatic tax withholding.
- Receive large bonuses, capital gains, or taxable retirement income without withholdings.
Taxpayers can adjust their remaining vouchers at any time during the year if income changes significantly.
Last reviewed: 2025-11-12: If you believe this form requires an update, please contact us.
Additional Resources
- Form AL-40 – Alabama Individual Income Tax Return
- Form AL-40ES – Estimated Tax Voucher
- Alabama State Tax Calculator
- Mortgage Calculator – Estimate monthly payments and affordability
- Alabama Department of Revenue – Individual Income Tax
Planning early with Form 40ES lets you manage cash flow and prevent unpleasant surprises at tax time. Use this form to stay compliant, reduce penalties, and meet your Alabama income tax obligations efficiently throughout the year.
Quick Access Tools
Frequently Asked Questions
What happens if Form AL-40X shows that I owe additional Alabama tax?
If your amended return results in a higher tax liability, you should pay the additional amount when you file AL-40X. Interest on underpaid tax generally accrues from the original due date of the return, not the date you amend, so delaying payment only increases the final cost. If you are mailing a check, Alabama recommends using a payment voucher such as Form AL-40V or AL-40NRV, depending on whether you are a resident or nonresident, so that your payment is correctly tied to the amended year and account. Failure to settle the extra liability can lead to billing notices, further interest, and potential collection actions. Even so, voluntarily amending and paying usually results in a better outcome than waiting for Alabama or the IRS to discover discrepancies.
What records should parents keep to support a Schedule AATC claim?
Parents should retain invoices, tuition bills, proof of payment (bank statements, receipts), enrollment confirmations, and school documentation proving entry into the non-failing or nonpublic school. The Alabama Accountability Act requires strict substantiation to prevent misuse, so taxpayers should also keep the school’s classification documents or confirmation that the original school appeared on the “failing school” list for the appropriate year. If audited, the Alabama Department of Revenue may request these records to validate the refundable credit. While documents are not mailed with the return, they should be kept for at least three years.
How can I estimate my Alabama tax before using Form 40A?
You can preview your expected liability with the Alabama State Tax Calculator. It uses current rates, thresholds, and personal exemptions to show how much tax you’ll owe or be refunded. This is especially useful if you are switching from the full Form 40 or adjusting withholding.
Who must file Alabama Form AL-40NR and how does it differ from the resident Form AL-40?
Form AL-40NR is required for individuals who were not Alabama residents for the tax year, or who lived in the state only part-time, but earned income from Alabama sources. Unlike the resident Form AL-40, which reports all income from all sources, Form AL-40NR focuses on allocating income between Alabama and other jurisdictions. You must complete the return if you earned wages for work performed in Alabama, had rental property within the state, received income through a pass-through entity operating in Alabama, or sold property located in Alabama. Part-year residents must report income earned while domiciled in the state and any income sourced to Alabama thereafter. The AL-40NR also requires an allocation schedule to separate Alabama-sourced income from non-Alabama income, ensuring the correct proportion of tax is calculated. This prevents nonresidents from overpaying on non-Alabama income while still ensuring Alabama collects the correct amount on in-state activity.
Why don’t my brackets match payroll tables?
Employers may use different rounding/timing tables; small variances are normal.
Important Notes
All calculations are estimates for guidance only. Always review your return and consider professional advice when submitting official filings.