2026 tax year · Iowa
Quarterly tax calculator for Iowa
A $50,000 1099 year in Iowa means about $2,190 to the IRS and $397 to the state, four times a year.
Switching state opens that state's page.
Line 24 of your prior 1040, unlocks the prior-year safe harbor.
Above $150,000 the prior-year target rises to 110%.
Enter what you expect to earn and press Calculate to see each payment.
The Iowa payment schedule on $50,000
A single filer with $50,000 of net 1099 profit, taking the standard deduction and paying 90% of this year's liability:
| Due | Income earned | To the IRS | To Iowa |
|---|---|---|---|
| April 15, 2026 | Jan 1 - Mar 31 | $2,190 | $397 |
| June 16, 2026 | Apr 1 - May 31 | $2,190 | $397 |
| September 15, 2026 | Jun 1 - Aug 31 | $2,190 | $397 |
| January 15, 2027 | Sep 1 - Dec 31 | $2,190 | $397 |
| Year | $8,759 | $1,589 | |
The Iowa side of each payment
Iowa taxes the same 1099 profit at a flat 3.8%, so a second payment goes to the state each quarter, about $397 on the $50,000 example, against $1,766 of Iowa income tax for the year.
The 2026 dataset carries the federal 1040-ES dates but not state-specific due dates, so confirm Iowa's schedule and voucher with its tax agency, several states do not match the federal calendar exactly.
What each quarter costs at three income levels in Iowa
A single filer taking the standard deduction, at three levels of net profit. The federal column moves with the self-employment tax and the federal brackets; the Iowa column moves with Iowa's own rules, so the two do not scale together. Use the calculator above for the other filing statuses:
| Net 1099 profit | Per quarter to the IRS | Per quarter to Iowa | Effective rate |
|---|---|---|---|
| $25,000 | $923 | $199 | 19.9% |
| $50,000 | $2,190 | $397 | 23.0% |
| $100,000 | $5,032 | $795 | 25.9% |
Staying inside the safe harbor
Payments are required once you expect to owe $1,000 or more, which the $50,000 example above does, at $11,498 for the year. Two targets avoid a penalty and you need only the lower; the hub explains both routes and the penalty.
What a quarter costs in the states Iowa borders
On $50,000, Iowa charges $1,900 of state income tax. Of the 6 states it borders, South Dakota is the lightest at nothing at all and Minnesota the most expensive at $2,932, a spread of $2,932 on the same income.
| State | State tax per quarter | vs Iowa |
|---|---|---|
| South Dakota | No income tax | −$428 a quarter |
| Nebraska | $444 | +$17 a quarter |
| Missouri | $502 | +$74 a quarter |
| Wisconsin | $509 | +$82 a quarter |
| Illinois | $557 | +$129 a quarter |
| Minnesota | $660 | +$232 a quarter |
- South Dakota has no income tax at all, so the same work done there costs $1,900 less in state tax than it does in Iowa.
- Nebraska would take $74 more, $1,974 against Iowa's $1,900.
- Missouri would take $330 more, $2,230 against Iowa's $1,900.
- Wisconsin would take $363 more, $2,263 against Iowa's $1,900.
- Illinois would take $575 more, $2,475 against Iowa's $1,900.
- Minnesota would take $1,032 more, $2,932 against Iowa's $1,900.
What this schedule assumes
- Single filer, standard deduction, net 1099 profit after expenses, no W-2 withholding.
- Four equal payments rather than annualised income.
- Iowa due dates are not in the 2026 dataset, the dates shown are the federal ones.
Iowa quarterly tax questions
How much should I send each quarter in Iowa?
On $50,000 of net 1099 profit as a single filer, about $2,190 to the IRS plus roughly $397 to Iowa. That is 90% of this year's liability, split four ways.
Does Iowa use the same due dates as the IRS?
Iowa requires its own estimated payments, but the 2026 dataset carries only the federal 1040-ES dates (April 15, 2026, June 16, 2026, September 15, 2026, January 15, 2027). Confirm Iowa's own schedule with its tax agency before assuming they line up.