Take-home pay on a $40,000 salary in Iowa
A $40,000 salary in Iowa leaves $33,412 a year after federal income tax, Social Security, Medicare and Iowa income tax — $2,784 a month, or $1,285.07 in a two-week paycheck. That is a single filer taking the standard deduction, with every figure below computed from the published tax tables rather than estimated.
Where every dollar of $40,000 goes
Modelled as a single filer on 2026 rules taking the standard deduction, with no 401(k), no health premiums and no dependents. federal income tax is the heaviest line here at $2,620, and Medicare the lightest at $580.
| Line | Per year | Per month | Per 2 weeks | % of gross |
|---|---|---|---|---|
| Gross salary | $40,000 | $3,333 | $1,538.46 | 100.0% |
| Federal income tax | −$2,620 | −$218 | −$100.77 | 6.6% |
| Social Security (6.2%) | −$2,480 | −$207 | −$95.38 | 6.2% |
| Medicare (1.45%) | −$580 | −$48 | −$22.31 | 1.5% |
| Iowa income tax | −$908 | −$76 | −$34.93 | 2.3% |
| Total withheld | −$6,588 | −$549 | −$253.39 | 16.5% |
| Take-home pay | $33,412 | $2,784 | $1,285.07 | 83.5% |
The federal income tax on $40,000, bracket by bracket
The federal bill is built in slices, never as one rate on the lot. First $16,100 comes off as the standard deduction, 40.3% of $40,000 — a big enough share that much of this salary is untaxed before the brackets start. The remaining $23,900 is then spread over two bands, with 12% touching only the final slice.
| Federal band | Rate | Income taxed here | Tax from this band |
|---|---|---|---|
| $0 – $12,400 | 10% | $12,400 | $1,240 |
| $12,400 – $50,400 | 12% | $11,500 | $1,380 |
| Total | $23,900 | $2,620 |
Federal tax on $40,000 totals $2,620, which is 6.6% of gross pay even though the top band reached is 12%. The gap between those two numbers is the whole point of a graduated system.
The Iowa income tax on $40,000, worked out
Iowa has one rate, 3.8%, and no ladder to climb. It subtracts $16,100 first, leaving $23,900 of Iowa taxable income, and charges the same rate on every dollar of it. That is the federal standard deduction to the dollar, so the Iowa and federal taxable figures on this page are the same $23,900 and the only thing separating the two bills is the rate applied to them.
| Step | Amount |
|---|---|
| Gross salary | $40,000 |
| Less what Iowa subtracts first | −$16,100 |
| Iowa taxable income | $23,900 |
| Iowa rate, on all of it | 3.8% |
| Iowa income tax | $908 |
Iowa income tax on $40,000 totals $908, 2.3% of gross pay. The only gap between that share and the 3.8% headline is the $16,100 subtracted above.
What applies to you at $40,000, and what does not
$40,000 against Iowa's wage floor
The minimum wage in Iowa is $7.25 an hour, which is $15,080 a year at forty hours a week. $40,000 is 2.7 times that. Run the floor through the same engine and it keeps $13,926 of that $15,080 — 7.7% withheld — against 16.5% at $40,000. The gap between those two shares is the graduated system doing its work: the extra $24,920 of gross is charged at higher rates than the first $15,080 ever is.
Iowa has no state minimum wage above the federal floor, so the federal $7.25/hour applies in 2026.
What Iowa takes from a bonus at $40,000
Iowa withholds supplemental wages — a bonus, a commission, a payout — at a flat 3.8%, not at the rate the rest of your pay is charged. That is exactly the rate your salary is charged at this rung, so a bonus and a raise are withheld identically here. On $1,000 of bonus it is the difference between $38.00 and $38.00 of Iowa withholding. Withholding is not the tax: what you owe is settled on the return either way.
Where your next federal dollar lands
$40,000 puts the next dollar in the band just above the lowest one, $38,000 wide and closed off by the largest rate step in the schedule, 10 percentage points in a single move. Until a pay rise is large enough to leave it, none of your income changes how it is treated. There is $26,500 of room left in the band, so roughly $26,500 of further salary is charged at this rate before any of it meets the next one.
Maxing a 401(k) is not realistic at $40,000
The 2026 elective deferral limit is $24,500, which is 61.3% of a $40,000 salary. Nobody at this income is hitting it, and the advice to "max out your 401(k)" is written for a salary several rungs up this ladder. What is worth knowing is the rate: every dollar you do defer comes off at 12% federally plus 3.8% in Iowa, so even a small contribution is bought at a real discount.
Where local wage taxes sit relative to this figure
The $33,412 above is what $40,000 leaves after federal withholding, FICA and Iowa state withholding, and nothing else. Anything a city, county or school district levies on wages sits outside that figure, and whether any of it reaches your paycheck is a municipal question rather than a state one — so it is not modelled here. Iowa's own published position is below.
Iowa school districts levy a local income surtax assessed as a percentage of state income tax liability (up to 20%), not of income. About 87% of districts impose it; the income-weighted average is roughly 0.3%. Six counties (Appanoose, Cass, Pocahontas, Sac, Shelby, Winnebago) also use a surtax for EMS. It is filed with the state IA 1040 return based on the district you reside in on the last day of the tax year.
What $40,000 does to the childcare credit
The Child and Dependent Care Credit pays a percentage of qualifying care costs, up to $3,000 of expenses for one dependent and $6,000 for two or more, and that percentage is set by your income. At $40,000 it is 38.0%: you are on the first slide, where the rate drops a point for every $2,000 of income above $15,000. It levels off at 35.0% once income reaches $45,000, so a raise from here costs you a little of this credit on the way. It is a nonrefundable credit and none of the figures above include it: they model a filer with no dependents.
Does Iowa follow the tips and overtime deductions?
The tips and overtime deductions described on this page are federal. On the state return Iowa treats them alike: it follows the federal tips and overtime deductions.
Iowa conforms (federal-taxable-income base); the deductions flow through to the state return.
What Iowa's flat rate costs on $40,000
Iowa has no bracket ladder to climb. One rate, 3.8%, applies to every taxable dollar, so unlike the federal schedule above there is no band edge anywhere near $40,000 and no step for a raise to fall over: the first taxable dollar and the last are charged identically, and the $908 of Iowa income tax on this salary is simply 3.8% of $23,900.
Iowa subtracts $16,100 before that rate touches anything, which is 40.3% of a $40,000 salary. That is the only thing on the state side that changes as you climb this ladder: the subtraction is a fixed number of dollars, so it covers a smaller share of pay at every rung, and the effective Iowa rate here — 2.3% of gross — creeps toward the 3.8% headline without ever reaching it.
What the step either side of $40,000 is worth
Coming up from $30,000, a $10,000 raise added $7,655 of take-home pay — 76.6% of it survived withholding. Going on to $50,000 would add $7,655 a year, $638 a month, out of $10,000 of extra gross, or 76.5%. Nothing in either schedule creates a cliff where earning more leaves you with less: a band rate only ever applies to the income inside that band.
Where Iowa ranks on $40,000
Run the same $40,000 through all fifty states and the District of Columbia and Iowa comes 17 from the top on take-home pay — 35 from the bottom — keeping $33,412. The jurisdictions immediately above it at this salary are Louisiana and Mississippi; immediately below are Missouri and Idaho. North Dakota tops the table at $34,320, $908 more than Iowa on identical gross pay, and Oregon is last at $31,114. That ranking is specific to $40,000: flat-rate and graduated states change places as income rises, so Iowa's neighbours on this table are different at other salaries.
The same $40,000 on the other filing statuses
Filing status changes both the standard deduction and the width of every federal band, and at $40,000 it is worth real money: a joint return on this same salary keeps $2,452 more a year than a single one, and head of household keeps $1,341 more. The FICA lines are the same on every row, because Social Security and Medicare do not ask about marital status.
| Filing status | Federal tax | IA income tax | Take-home a year | Share withheld |
|---|---|---|---|---|
| Single / Married filing separately | $2,620 | $908 | $33,412 | 16.5% |
| Married filing jointly | $780 | $296 | $35,864 | 10.3% |
| Head of household | $1,585 | $602 | $34,753 | 13.1% |
How this figure was computed
These figures are generated, not written: the 2026 tax data file in this repository goes into the same engine that powers the Iowa paycheck calculator, and the page is rebuilt from the result.
- Gross
- $40,000 a year, spread evenly: $19.23 an hour, $1,538.46 a fortnight.
- Federal
- 2026 brackets on $23,900 taxable (gross less the $16,100 standard deduction), Rev. Proc. 2025-32 → $2,620.
- FICA
- Social Security $2,480 on all of $40,000, under the $184,500 base. Medicare $580.
- Iowa
- 3.8% on $23,900 ($40,000 less the $16,100 Iowa subtracts first) → $908.
What this does not include
- What the figures do not touch. Pre-tax money of any kind — 401(k), HSA, FSA, health premiums — plus credits, dependants, itemising, non-wage income and the employer's own FICA share.
- What is specifically live at $40,000. None of the following is in the take-home figure above, and all of it is real at this income: the Child and Dependent Care Credit, whose rate at this income is set by the §21 schedule described above.
- Iowa's small personal-exemption tax credits ($40 single / $80 MFJ / $40 per dependent) are post-tax credits and are not modeled.
A computed estimate, not tax advice. Your own W-4, benefits and credits move the number.
Frequently asked questions
What is the take-home pay on a $40,000 salary in Iowa?
About $33,412 a year for a single filer taking the standard deduction, after federal income tax of $2,620, Social Security of $2,480, Medicare of $580 and Iowa income tax of $908. In total 16.5% of gross pay is withheld.
$40,000 a year is how much a month, after tax, in Iowa?
$2,784 a month, $1,285.07 on a fortnightly cycle and $1,392.16 paid twice a month. Federally you are in the 12% bracket, and Iowa charges its single 3.8% rate, though neither applies to the whole salary.
What does going from $40,000 to $50,000 actually add?
$7,655 more a year, $638 a month. That is 76.5% of the $10,000 raise; the rest goes to federal tax, FICA and Iowa withholding.
Is $40,000 a good salary in Iowa?
Context, not advice: it is below Iowa's median HOUSEHOLD income of $75,501, a figure that often covers two earners, so a single earner on $40,000 is not as far off the middle as that comparison suggests. Housing cost is not modelled anywhere here.
Why might my own paycheck differ from this?
Because this page models one specific person: a single filer, standard deduction, no 401(k), no premiums, no dependants. Every one of those that is different for you moves the number, and so does what you put on your W-4. The Iowa paycheck calculator takes all of them.
Sources
- Iowa: source for the state figures on this page
- IRS: 2026 inflation-adjusted tax brackets
- IRS: Rev. Proc. 2025-32 (2026 brackets, all statuses)
- Social Security Administration: Contribution and Benefit Base
- IRS: Topic no. 751, Additional Medicare Tax
Federal figures were last verified 2026-08-14.
Found an error? See our corrections log or contact us.