Consider a household with an annual income of $70,000, spending $900 a month on credit card bills and car payments. Adding a $1,400 monthly mortgage payment results in a debt-to-income ratio, or DTI, of about 39 percent. This figure is the first criterion that determines approval.

DTI is the ratio of monthly debt payments to monthly income. According to the Consumer Financial Protection Bureau, a back-end DTI of 43 percent or lower is recommended, while conventional loans typically range from 36 to 45 percent. An ideal front-end DTI, which considers only housing costs, is below 28 percent. In markets like St. Louis, where home prices are relatively low, meeting these ratios is generally easier than in larger cities.

As of June 2026, the median home price in St. Louis is $255,000, a 6.2 percent increase from the previous year. If you assume a down payment of 3.5 percent, that amounts to $8,925; 5 percent would be $12,750; 10 percent would be $25,500; and 20 percent would be $51,000. FHA loans are available with a minimum credit score of 580, starting at 3.5 percent down. For scores between 500 and 579, the minimum requirement is 10 percent.

If you put down less than 20 percent, you will incur PMI, or private mortgage insurance, which adds to your monthly payments. While the burden of this insurance is not significant based on St. Louis's median, it does affect the DTI calculation since it adds to the monthly principal and interest. Remember that a lower down payment increases the loan principal, which in turn raises the DTI.

The effective property tax rate in Missouri averages around 0.88 percent. For families moving from other states, this number may seem low. However, there are variations by county, so be sure to check the exact tax rate for the property. Property taxes are included in the monthly escrow, directly impacting the DTI calculation.

The Missouri Housing Development Commission's First Place Loan Program offers first-time homebuyers a forgivable second mortgage of 4 percent of the loan amount for down payment and closing costs. After living in the home for 10 years, the loan is fully forgiven, and it decreases by 1/60th each month starting in the fifth year. Utilizing this support can reduce initial cash burdens and leave more reserves, positively influencing the approval process.

Practical ways to increase approval rates ultimately narrow down to a few strategies. Raising your credit score to the 740s can secure a recent rate of around 6.75 percent, while scores in the 760s can get 6.66 percent, and those above 780 can go as low as 6.59 percent. Getting pre-approved first clarifies your budget, and it's safer to avoid new loans or job changes before closing. It's advisable to prepare at least two years of income documentation.

Having reserves is also important. Keeping cash on hand to cover several months of principal and interest after closing will help you be viewed as a stable household during the loan review. It's often more beneficial to secure reserves even if it means lowering the down payment amount rather than depleting your bank account.

Neighborhoods in St. Louis where Korean families tend to settle often overlap with areas known for good school districts. While resources like GreatSchools or Niche can provide ratings, school district boundaries change frequently, so it's wise to verify the assigned school for the specific address before purchasing. Homes in good school districts typically sell for more than the median, so you should budget for a larger down payment and DTI flexibility.

For families moving from out of state, it's worth comparing not just property taxes but also homeowners insurance rates. Missouri is a tornado-prone area, which can lead to higher-than-expected insurance costs, and this amount is also included in the monthly escrow, directly affecting the DTI. Budgeting based solely on the previous state's standards may not reflect the actual monthly burden.

Pre-approval is different from pre-qualification. Pre-qualification is an estimate based on self-reported income, while pre-approval is the actual limit after income verification and credit checks. Naturally, sellers prefer the latter when considering offers. Reserves are typically based on three to six months of principal and interest, but it's safer to prepare more to account for moving costs and furniture expenses right after closing.

This article does not constitute investment or legal advice. Property tax rates and loan conditions can vary by county and lender, so be sure to consult with a professional before finalizing any contracts.