Alabama Withholding Form A4: Filing Status, Dependents, and Penalties

Alabama Form A4 is the state’s Employee’s Withholding Tax Exemption Certificate, and you fill it out by entering your name, address, and Social Security number at the top, choosing one filing status letter, writing in the number of dependents you actually support, then signing and dating the bottom. Hand it to your employer’s payroll or HR department on or before your first day of work. The federal W-4 does not substitute for it, so you complete this form even if you already filled out federal paperwork.¹

Where to Get the Form and What Goes at the Top

Your employer’s payroll or HR office should have blank copies, or you can download one from the Alabama Department of Revenue website. The top section asks for your full legal name, Social Security number, and current home address. Enter these carefully. Payroll uses the SSN and name to match your withholding to your state tax account, and a typo there causes reconciliation problems at year-end.

Picking Your Filing Status Letter

The filing status box is the single most important decision on the form because it sets your personal exemption and the standard deduction your employer will apply. Choose one letter:

S – Single. Unmarried and not qualifying as head of family. Personal exemption: $1,500.
MS – Married Filing Separately. Married but you want withholding based on your own wages alone. Personal exemption: $1,500.
M – Married Filing Jointly. Married and want withholding to reflect a joint return. Personal exemption: $3,000.
H – Head of Family. Unmarried with a qualifying dependent you support. Personal exemption: $3,000.

These exemption amounts are fixed by Alabama law and do not adjust for inflation.²

There is also a “0” option. Selecting zero exemptions applies no personal exemption and directs your employer to withhold at the highest rate. Some employees pick zero on purpose to avoid owing tax at filing time, accepting smaller paychecks throughout the year in exchange.

Do You Actually Qualify as Head of Family?

Head of family causes the most mistakes. To use “H,” you must be unmarried and have at least one qualifying dependent for whom you provide more than half of that person’s total financial support during the year. Qualifying dependents include your children, grandchildren, stepchildren, parents, grandparents, siblings, and certain other relatives. Aunts, uncles, nieces, and nephews only count when they are blood relatives.³ If you claim “H” without meeting these conditions, you expose yourself to the $500 penalty for overclaiming exemptions.

Entering the Number of Dependents

In the dependents box, write the number of people (other than yourself and your spouse) who receive more than half of their financial support from you during the year. Just a number. You do not calculate the dollar value.

That per-dependent value is baked into your employer’s withholding calculation and scales with income: $1,000 per dependent if your gross income is $20,000 or less, $500 per dependent when income is above $20,000 up to $100,000, and $300 per dependent above $100,000.⁴ Claiming more dependents lowers the tax taken from each paycheck; claiming fewer raises it. Higher earners get a smaller reduction per dependent, which the form itself does not explain.

Signing and Handing It In

Sign and date the bottom of the form. Your signature certifies under penalty of perjury that what you entered is accurate. Give the completed A4 to your employer’s payroll or HR contact. Do not mail it to the Alabama Department of Revenue. The form stays with your employer as part of your payroll records.

Your A4 takes effect at the start of the first payroll period after you submit it and stays in force until you replace it.¹ If you never turn one in, your employer must withhold at the zero-exemption rate, meaning no personal exemption, no dependent exemptions, and the maximum tax from every check.⁵

When You Need to File a New A4

The A4 you turn in on your first day stays active indefinitely, but Alabama Code Section 40-18-73 requires a new certificate whenever the number of exemptions you are entitled to goes up or down.¹ Common triggers:

Marriage. You may now qualify for the $3,000 married personal exemption instead of $1,500.
Divorce or separation. If you had been filing as married, you need to switch to S or H.
Birth or adoption of a child. Your dependent count goes up.
A dependent aging out or becoming self-supporting. Your dependent count goes down.

When your exemptions decrease, file the updated form promptly. When they increase, you can submit a new one anytime to lower your withholding. Your employer can apply the new certificate right away or wait until the next January 1 or July 1, whichever comes at least 30 days after you submit it.¹

Penalty for Claiming More Exemptions Than You Should

Overclaiming to shrink your withholding is not something Alabama treats lightly. The state imposes a $500 civil penalty on any employee who claims more exemptions on the A4 than they are entitled to without a reasonable basis for the number.⁶ That penalty is on top of any additional tax, interest, or criminal exposure. The safe approach is to claim only what your situation actually supports and to update the form when things change.

Military Spouses Use Form A4-MS Instead

If you are the civilian spouse of an active-duty servicemember, a different form, Form A4-MS, may exempt you from Alabama withholding entirely under the federal Military Spouses Residency Relief Act. All four conditions have to be true: your spouse is on active duty, you are in Alabama solely to be with your spouse, you both live at the same address, and your legal domicile is a state other than Alabama.⁷ Miss any one of them and you use the regular A4. The same $500 penalty applies if you file A4-MS without qualifying.⁵

The A4 Does Not Replace the Federal W-4

Alabama law expressly bars employers from accepting a federal W-4 in place of the A4.¹ The two forms operate differently. The W-4 was redesigned in 2020 and no longer uses numbered allowances; the A4 still uses a filing-status-and-exemption system with fixed dollar amounts. Completing one does not satisfy the other, and your employer needs both on file.

One connection is worth knowing. Alabama subtracts your federal income tax withholding before calculating state tax, so anything you change on your W-4 will move your Alabama withholding too, even if your A4 sits untouched. If you add extra federal withholding, your Alabama taxable wages fall and your state withholding drops along with them. Keep that in mind whenever you adjust either form.

1
Alabama Legislature. Alabama Code 40-18-73 – Withholding Certificates
2
Alabama Administrative Code. Ala Admin Code r 810-3-19-.02 – Personal Exemptions and Credit for Dependents
3
Alabama Department of Revenue. Form A4 – Employee’s Withholding Tax Exemption Certificate
4
Alabama Administrative Code. Ala Admin Code r 810-3-71-.02 – Computing Tax Withheld
5
Legal Information Institute. Ala Admin Code r 810-3-73-.01 – Withholding Exemption Certificates
6
Alabama Legislature. Alabama Code 40-29-75 – False Information With Respect to Withholding
7
Alabama Department of Revenue. Form A4-MS – Employee’s Withholding Tax Exemption Certificate