October 5, 2026- If you are comparing homes in Iowa City, Coralville, North Liberty, or Cedar Rapids, the listing price is only part of the monthly picture. Iowa property taxes in Johnson County and Linn County follow the same state rules, but the final bill can look very different from one address to the next. Here is a plain-English walkthrough so there are no surprises at closing.
How Iowa Property Taxes Are Calculated
Both counties use the same basic steps:
- Assessed value. The county assessor estimates your home’s market value (100% of market value for residential property).
- Rollback. State law limits how fast taxable residential value can grow, so assessed value is multiplied by a “rollback” percentage. Johnson County currently lists the residential rollback at 44.5345%.
- Credits. Eligible owners subtract credits, such as the homestead credit, before the levy is applied.
- Levy rate. The remaining taxable value is multiplied by the levy rate (dollars per $1,000) for your specific taxing district.
Why Two Neighbors Can Pay Different Amounts
The levy rate is built from several taxing authorities: the county, the city, the school district, and others. That means two homes with the same value can have different bills depending on which city and school district they sit in. A home in Coralville served by one school district can carry a different levy than one a few blocks away in another.
For buyers, the takeaway is simple: never estimate taxes by looking at the seller’s current bill alone, and never assume a neighboring town has the same rate.
Johnson County vs. Linn County
Iowa City, Coralville, and North Liberty sit mostly in Johnson County. Cedar Rapids, Marion, and Hiawatha are in Linn County. The calculation method is the same in both, so the differences come from home values, local budgets, and school district levies. Each county auditor publishes levy reports by taxing district, which is the best place to check a specific address.
Don’t Forget the Homestead Credit
If the home is your primary residence, apply for the homestead credit. Owners must live in the home on July 1 and for at least six months of the year, and the application deadline is July 1. Johnson County also lists a credit of up to $6,500 for owners age 65 and older, and a military exemption of up to $4,000. Credits lower your bill, they are not refunds.
When Taxes Are Due
Iowa property taxes are paid in two halves. In Johnson County the 2026 installments are due September 1, 2026 and March 1, 2027. Linn County’s first half is due September 30 and the second half March 31. Taxes are paid in arrears, so at closing the seller and buyer split the bill by prorating the days each owns the home. If you finance, your lender will usually collect an estimate each month in escrow.
Planning Your Budget in Today’s Rate Environment
With the average 30-year fixed rate around 7.3% as of October 5, 2026 (NerdWallet, a touch lower after Friday’s jobs report), every part of the monthly payment matters. Taxes, insurance, and principal and interest all add up, so ask your lender for a full payment estimate, not just a rate quote. Rates move daily, so confirm today’s numbers with a lender before you decide.
Questions to Ask Before You Make an Offer
- What were the most recent taxable value and levy for this specific address?
- Is the current owner receiving the homestead credit that I will need to apply for?
- Has the home been recently renovated or added onto, which could raise its assessed value?
- Which school district and taxing district does the address fall in?
Talk to a Local LKR REALTOR®
Property taxes are one of the details a local agent can help you sort out before you write an offer. The REALTORS® at Lepic-Kroeger, REALTORS® know the Iowa City, Coralville, North Liberty, and Cedar Rapids markets block by block and can help you compare the true monthly cost of homes in each. Visit lkriowa.com to connect with an LKR REALTOR® today, or request a free home valuation if you are thinking of selling.
Tax figures are general guidance and can change. Confirm current values with the Johnson County or Linn County Assessor and Auditor.