How an Arkansas paycheck works
Arkansas does something no other state does: it withholds on a rounded stand-in for your income rather than on your income. The employer annualises your pay, subtracts a flat standard deduction, then takes the result to the midpoint of the hundred-dollar band it falls in and taxes that figure. Only well up the pay scale does the calculation switch to your exact income.
The consequence is that Arkansas withholding is a staircase. Every salary inside a band has exactly the same amount withheld, and the figure steps up as you cross into the next band.
Federal income tax withholding
Federal withholding annualises the wage, subtracts the standard deduction that matches the filing status on Form W-4 Step 1, applies the graduated schedule for that status, and deducts the dependent credit from Step 3. This page models a W-4 with Steps 2 and 4 left blank: one job, no spouse income, no other income, no extra withholding. Above the income limit for the status, the dependent credit tapers by a set amount for every thousand dollars of excess rather than disappearing at a cliff.
Social Security and Medicare
Social Security applies a flat rate to wages up to an annual ceiling that is re-indexed each year, so it stops partway through the year for a high earner. Medicare applies to every dollar, and above a fixed wage threshold the employer withholds the Additional Medicare tax on the excess, with no employer match and no regard for filing status.
Filing status does not exist here
The formula has one standard deduction and one bracket table, and neither depends on whether you are single, married or head of household. Selecting a different status on this page changes your federal withholding, and so the total, but the Arkansas line stays put. The only state input is the number of withholding exemptions on Form AR4EC.
Percentage minus adjustment, and the taper at the top
The bracket table is not the usual "so much on the excess" shape. Each row gives a rate that applies to your whole income and a fixed amount subtracted afterwards, which is arranged so the tax is continuous where one bracket meets the next.
Above a high income the table adds a long tail of rows, one for every hundred dollars, in which that subtraction shrinks steadily. The effect is to claw back the benefit of the lower brackets from high earners a little at a time rather than at a single threshold. Withholding rises noticeably faster through that stretch than the headline top rate alone would suggest.
Exemptions come off the tax
Each withholding exemption you claim on Form AR4EC is worth a fixed number of dollars subtracted from the annual tax, not from your income. That makes an exemption worth exactly the same to every employee whatever they earn, which is unusual: in most states an allowance reduces taxable income and is therefore worth more to a higher earner.
A contradiction in the publication, and how this page reads it
The formula gives two different figures for where the midpoint lookup stops and the exact income is used. The numbered instruction says one thing; the prose of the worked example says another, several thousand dollars lower. Both appear in the same document.
This page follows the numbered instruction, because the example's prose also quotes a subtraction amount that its own arithmetic then contradicts, which makes it the less reliable of the two texts. Either way the staircase in the upper range steps by more than a small raise at some band edges, so take-home pay can dip there; that comes from the taper itself rather than from which threshold you read. If you are reconciling against a payroll system in that narrow band of income, this is the place the two could differ.
The low income tables are not used here
Arkansas also publishes a separate set of Low Income Tax Tables, which an employer may use instead of this formula and which withhold considerably less from low earners. This page uses the formula method, which the state authorises for employers with computerised payroll and which is the method comparable to the one used for every other state on this site. If your employer uses the low income tables and you are near the bottom of the pay scale, your actual withholding will be lower than shown.
Local income tax
No Arkansas county or city taxes wages. Little Rock, Fayetteville and Fort Smith all have the same payroll deductions as anywhere else in the state.
What the employer pays on top
The employer matches Social Security and Medicare and pays federal unemployment tax at its net rate. Arkansas unemployment insurance is charged to the employer at a rate set from its own claims record on a state wage base, so it is left out. There is no employee-side state levy in Arkansas: no disability insurance, no paid family leave premium.
What this calculator assumes
The figure models a salaried employee paid evenly across the year with a standard Form W-4 and Form AR4EC, and no pre-tax deductions. It leaves out:
- Pre-tax contributions such as a 401(k), health premiums, HSA or flexible spending accounts, which reduce the wages subject to income tax and often to FICA.
- The Low Income Tax Tables, which an employer may use instead of the formula.
- Extra withholding requested on the federal or state certificate, and the W-4 Step 2 and Step 4 adjustments.
- Bonuses and other supplemental wages.
- The Texarkana exemption for residents of that border city.
- Employer-side state unemployment insurance, which is priced per employer, and any federal unemployment credit reduction.
- Employees outside the normal Social Security system, such as some public-sector staff and certain visa holders.
Withholding versus your final tax bill
Withholding is a prepayment. The annual returns, federal and state, replace these standard assumptions with your real situation: itemised deductions, other income, and credits payroll knows nothing about. One job usually produces a refund; two jobs, a working spouse or investment income often produce a balance due.