A family that recently requested a consultation found themselves stuck at the loan approval stage after making an offer. Their credit score was in the 690 range, and the combination of auto loan payments and student loan repayments pushed their debt-to-income ratio (DTI) over 48%, which was the issue. Such cases are not uncommon in Iowa City. The reasons for loan denial generally stem not from the home price itself but from the combination of DTI and credit score.

First, let's look at the size of the down payment. The median sale price in Iowa City is around $325,000 (Redfin, May 2026). Based on this price, a 3.5% down payment would be $11,375, 5% would be $16,250, 10% would be $32,500, and 20% would be $65,000. Simply put, the amount you prepare for a down payment can significantly affect your initial cash burden, increasing it by nearly six times.

If your credit score is above 580, you can lower your down payment to 3.5% with an FHA loan, and if it's between 500 and 579, the minimum requirement is 10% (FHA.com). Conventional loans can start at 3% for first-time homebuyers or households earning 80% or less of the area median income (NerdWallet). However, if you put down less than 20%, you will incur PMI, or private mortgage insurance, each month. If this terminology is unfamiliar, think of it this way: from the bank's perspective, a lower down payment increases risk, and that risk is covered by the insurance premium. If you put down more than 20%, the PMI is eliminated, reducing your monthly burden.

To increase your approval chances, there are three main strategies. First is managing your credit score. For a 30-year fixed mortgage, if your score is above 780, the average interest rate is 6.59%, 760s are at 6.66%, 740s at 6.75%, and 700s at 6.91% (themortgagereports.com, July 2026). Just raising your score by one bracket can significantly lower your monthly payment. Second is lowering your DTI. Ideally, the front-end DTI, which is the housing cost ratio, should be below 28%, and the back-end DTI should be below 43% (Consumer Financial Protection Bureau). Third is getting pre-approved. Having your income and assets verified before making an offer can reduce surprises during the actual review process.

• Do not open new credit cards or auto loans before closing.
• Postpone job changes or changes in income type until after closing.
• Keep 2-3 months' worth of living expenses as reserves in addition to the down payment.
• Prepare income documentation such as W2s, pay stubs, and tax returns in advance.

Iowa operates a First Home program through the Iowa Finance Authority (IFA). If you have not owned a home in the last three years, you are recognized as a first-time homebuyer and can receive a $2,500 grant or a second loan of up to 5% of the purchase price (Iowa Finance Authority). The second loan is structured to be settled at the time of sale, refinancing, or payoff, rather than being paid monthly, which can significantly reduce your initial cash burden. Using this program to cover your down payment can allow you to allocate remaining cash for reserves or closing costs, which can be advantageous during the approval process.

Deciding whether to start with a 3.5% down payment or go up to 20% is a matter of assessing both your cash capacity and monthly payment ability. A 3.5% down payment has the lightest initial burden, but PMI will continue until the loan balance decreases. Filling 20% allows you to start without this burden, but it significantly reduces your cash capacity at closing. Locking in your interest rate after pre-approval means you won't be affected by rate fluctuations during the review process. Additionally, if you receive down payment funds as a gift from family, the bank will require a gift letter and proof of funds, so preparing these documents in advance can expedite the review. Delays in preparing these documents can often push back the closing schedule.

Property taxes should also be factored in. The average effective tax rate in Iowa is around 1.34% (Ownwell, 2026). However, there can be variations by county, so be sure to check the tax rate based on the actual property address. If you are considering school districts, refer to ratings from GreatSchools or Niche, but keep in mind that school district boundaries change frequently, so verify the assigned school for the address before purchasing. This article is not investment or legal advice, and it is recommended to consult with a loan officer and real estate professional before finalizing any contracts.