Iowa IA W-4 (2026): Withholding Allowance Certificate

What is 2026 IA W-4?

The IA W-4 is Iowa's Employee Withholding Allowance Certificate. Each employee must file one with their employer so the right amount of Iowa income tax is withheld. The federal Form W-4 doesn't set Iowa withholding.

Iowa allowances are dollar amounts. On the 2026 form you claim $40 for yourself ($80 as an unmarried head of household), $20 more each for being 65 or older or blind, allowances for a spouse who doesn't work or claim their own, $40 per dependent, and allowances for itemized deductions, adjustments to income, the child and dependent care credit and the federal personal exemption for people 65 or older — most of them 3.8% of the amount involved. You can also claim exemption from withholding, including as a military spouse.

With FileIt you fill out the IA W-4 online in a guided form. FileIt pre-fills your name from the People records in your vault, works out lines 1 to 7 at the 2026 figures (including the line 3 worksheet on page 3), checks the care-credit limit, and prints everything into the Department's own PDF. If you are the employer, FileIt can also fill page 4, the Centralized Employee Registry new-hire report. FileIt never submits anything — you give the certificate to your employer, and the employer reports the hire.

Who fills it: The employee fills and signs page 1. The employer completes the employer box in some exemption cases, and page 4 (new-hire report).
Given to: Your employer, who must keep it on record.
When: When you start a job, and within 10 days if the allowances you may claim go down.
Signatures: The employee signs and dates it under penalties of perjury.
Edition: 2026 IA W-4, 44-019a (11/13/2025); page 4 is 44-019d (11/18/2024).
Cost: Free to fill out on any FileIt account.

Who needs to fill out 2026 IA W-4?

Every employee whose employer withholds Iowa income tax — the form says each employee must file one.
Current employees whose allowances have gone down, who must file a new one within 10 days.
Iowa residents who had no Iowa tax liability last year and expect none this year, who can claim exemption.
Spouses of service members in Iowa under military orders who keep a domicile or residence in another state.
Employers in Iowa reporting a new hire or rehire to the Centralized Employee Registry by fax or mail (page 4).

When to use 2026 IA W-4

On your first days with a new employer, together with the federal Form W-4 and Form I-9.
Within 10 days if the allowances you are eligible to claim decrease; any time they increase.
By February 15 if you want to claim exemption from withholding again next year.
Within 10 days of expecting to owe Iowa income tax after claiming exemption, or by December 31 if you expect to owe next year.
For employers: page 4 within 15 days of the employee's start date.

What you need before you start

Your filing status, and if you file jointly, whether your spouse also has earned income.
Your name, Social Security number and home address.
Whether you and your spouse are 65 or older or blind, and whether your spouse works or claims their own allowances.
The number of dependents you will claim on your Iowa return.
Estimates of your federal itemized deductions, adjustments to income (IRA, Keogh or SEP payments, early-withdrawal penalties, student loan interest) and any federal personal exemption for being 65 or older.
For the care credit: your Iowa total income and whether you have qualifying child or dependent care expenses.
For the military spouse exemption: your state of domicile or residence and a copy of your spousal military ID card.
For page 4 (employers): the FEIN, business address, start date, dependent health coverage details and the employee's date of birth.

What’s on 2026 IA W-4

The 2026 edition has 5 pages. FileIt asks for it in 5 parts, and it is signed by Employee:

Filing status, name and addressEmployee
Exemption from withholdingEmployee
Lines 1–8: Allowances (if you are not exempt)Employee
Employer box (exemption with wages over $200 a week)Employer
Page 4: Centralized Employee Registry new-hire reportEmployer

How to fill out 2026 IA W-4, step by step

1 Filing status

Choose Other (including single), Head of Household, Married filing jointly or Qualifying Surviving Spouse. Other also covers married filing separately and married people who want to withhold as single. If you choose Married filing jointly and say your spouse also has earned income, your withholding is worked out as if you were single; choose No if you don't want that.

2 Exemption from withholding

Iowa residents may enter EXEMPT and the year if they had a right to a refund of all Iowa tax withheld last year because they had no liability, and expect the same this year. The instructions give income limits: for example, under 65 and single with total income under $9,000 (under $5,000 if someone claims you as a dependent), or $13,500 combined for other statuses; 65 or older, $24,000 single or $32,000 combined. Nonresidents may not claim it. Military spouses who qualify tick their own box and enter their state of domicile or residence.

3 Line 1 — Personal allowances

$40 for yourself, or $80 if you are unmarried and eligible for head of household, plus $20 if you are 65 or older and $20 if you are blind. If you are married and your spouse doesn't work or isn't claiming allowances on a separate W-4, add $40 for your spouse and $20 each if your spouse is 65 or older or blind. Claim $0 for the most withholding.

4 Lines 2–4 — Dependents, itemized deductions and adjustments

Line 2 is $40 for each dependent you claim on your Iowa return. Line 3 comes from the worksheet on page 3: your estimated federal itemized deductions minus the federal standard deduction ($16,100 single or married filing separately, $24,150 head of household, $32,200 joint or qualifying surviving spouse), times 3.8%, rounded to the nearest dollar. If both spouses work, each uses their share of the deductions and the single amount. Line 4 is your estimated adjustments to income times 3.8%, rounded.

5 Lines 5–8 — Care credit, federal exemption, total and extra

Line 5 is for qualifying child and dependent care expenses: up to $200 with Iowa total income under $20,000, $160 up to $34,999, $120 up to $44,999 and $40 up to $89,999; nothing at $90,000 or more. Line 6 is the federal personal exemption for those 65 or older (up to $6,000) times 3.8%, rounded. Line 7 adds lines 1 to 6. Line 8 is any extra amount to deduct each pay period, for example with more than one job or income other than wages.

6 Signature and employer box

Sign and date under penalties of perjury. If you claim exemption and your wages are expected to exceed $200 per week, the employer completes the box at the bottom and within 90 days sends a copy to the Alcohol & Tax Compliance Division, Iowa Department of Revenue, PO Box 10456, Des Moines, Iowa 50306-0456.

7 Page 4 — New-hire report

Employers doing business in Iowa must report new hires and rehires to the Centralized Employee Registry within 15 days of the start date. Online reporting at iowachildsupport.gov is the preferred method; page 4 is the fax and mail version, with the employer's FEIN, name and address, dependent health coverage, start date, and the employee's date of birth, SSN, name and address.

Common mistakes to avoid

Claiming the same allowances at two jobs, or both spouses claiming the same allowances.
Claiming the spouse allowance when your spouse works and claims their own allowances.
Claiming more than the care-credit table allows for your income, or claiming it with $90,000 or more of total income.
Forgetting to round the 3.8% lines to the nearest dollar.
A nonresident claiming the EXEMPT exemption, which the form doesn't allow.
Not filing a new IA W-4 within 10 days when your allowances decrease.

After you fill it out

Sign and date page 1 and give it to your employer, who must keep it on record. FileIt saves a copy in the person's vault folder, and you can send the PDF for e-signature if your employer accepts that.

Employers send a copy to the Iowa Department of Revenue within 90 days when an employee claims exemption with wages expected to exceed $200 per week, and report the hire to the Centralized Employee Registry within 15 days (online, or by fax or mail with page 4).

Review your IA W-4 when your situation changes. If you claimed exemption and want it again next year, file a new one by February 15.

Fill out 2026 IA W-4 online with FileIt

Pick the person. Choose someone from People and FileIt fills in their name, date of birth, address and other details it already knows.
Answer plain-language questions. One part of the form at a time, with the official help text beside each question — 68 fields in all. Your answers save as you go.
Check the live preview. Watch your answers land on the real Iowa Department of Revenue form, and let FileIt do any worksheet arithmetic.
Generate the official PDF. FileIt prints your answers into the agency’s own PDF and files it in that person’s folder in your vault. Sign it, or send it for e-signature.

FileIt fills the form — it never files or submits anything for you. Deliver the finished form to whoever asked for it, the way the form’s instructions say.

Start 2026 IA W-4 now — it’s free

2026 IA W-4: frequently asked questions

What is the Iowa IA W-4?

It is Iowa's Employee Withholding Allowance Certificate. Your employer uses the dollar allowances you claim, and any extra amount, to work out how much Iowa income tax to withhold.

How much is each Iowa allowance for 2026?

The 2026 form gives $40 for yourself ($80 for an unmarried head of household), $20 each for being 65 or older or blind, $40 for a qualifying spouse, and $40 per dependent. The itemized deduction, adjustment and federal exemption lines are 3.8% of the amount, rounded.

Who can claim exemption on the IA W-4?

Iowa residents who had no Iowa tax liability last year and expect none this year, within the income limits in the instructions, and qualifying military spouses. Nonresidents may not claim the general exemption. Military personnel on active duty are also exempt from withholding.

My spouse and I both work. What should we choose?

If you choose Married filing jointly and Yes for your spouse having earned income, withholding is figured as if you were single. You may not both claim the same allowances.

What is page 4 of the IA W-4 file?

The Centralized Employee Registry Reporting Form, which employers use to report new hires by fax or mail within 15 days. Online reporting at iowachildsupport.gov is preferred.

Can I fill out the IA W-4 online?

Yes. FileIt works out lines 1 to 7 and the page 3 worksheet, and prints your answers into the Iowa Department of Revenue's fillable PDF, ready to sign.

Official sources

Blank form (PDF), published by Iowa Department of Revenue: https://revenue.iowa.gov/media/4324/download?inline=
Official instructions and guidance: https://revenue.iowa.gov/media/4324/download?inline=
Edition shown on this page: 2026, 44-019a (11/13/2025) (checked 2026-09-28).

FileIt is not affiliated with or endorsed by Iowa Department of Revenue or any government. This page explains the form in general terms and is not legal, tax or immigration advice. Always read the official instructions, and check that you are using the edition the recipient accepts. Page last reviewed 2026-09-28.