When consulting with investors who already own two or three properties in St. Louis, conversations often hit a similar point. Many come in thinking that the next property will qualify for a loan under the same conditions as before, but in reality, as the number of properties increases, the approval criteria become stricter.

Loans for primary residences and investment properties are evaluated based on different criteria. A down payment is typically required to be between 15% and 25%, and while a credit score of 620 may allow for approval, a score above 740 is needed to secure favorable interest rates. Interest rates are generally set about 0.5 to 0.75 percentage points higher than those for primary residences, according to the guidelines from Freddie Mac and Fannie Mae for investment property loans.

How rental income is factored into loan assessments is also crucial for those managing multiple properties. Lenders will only recognize up to 75% of the expected rental income as income, and a rent schedule must be attached to the lease agreement or appraisal. I often see investors surprised by lower-than-expected loan limits due to this factor.

As of July 2, 2026, the average rent in St. Louis is $1,439 per month, according to RentCafe, which is a 2.37% increase from the previous year. Compared to the national average, this is still relatively low, making it easier to find properties that meet the 1% rule, which suggests that if the monthly rent is more than 1% of the purchase price, there is a good chance of positive cash flow. However, it's important to note that the 1% rule is just a starting point and does not account for vacancy periods or repair costs.

St. Louis has a relatively light property tax burden. According to tax-rates.org, the effective property tax rate in the city of St. Louis is about 0.92%, and for a home valued at $122,200, the annual median property tax is $1,119. However, in some areas of St. Louis County, the effective tax rate can rise to 1.25%, so it's important to check whether a property falls under city or county jurisdiction before closing.

Missouri does not have a rent control system that limits rent increases, and state law prevents local governments from implementing their own rent control measures. While rent cannot be increased during the lease term, there are no limits on increases at the time of renewal. Tenant protections include a cap on security deposits at two months' rent and a requirement to return deposits within 30 days, as well as provisions against retaliatory eviction.

For investors managing multiple properties, it's also important to factor in management costs. If you hire a property management company, they typically take a commission of 8% to 12% of the monthly rent, and landlord insurance is generally more expensive than standard homeowners insurance due to broader coverage. A common industry rule of thumb is to set aside about 1% of the property value annually for maintenance costs.

When it comes time to sell, considering a 1031 exchange to defer capital gains taxes can be worthwhile. Since you need to reinvest in like-kind properties within a specific timeframe, it's advisable to coordinate schedules with a tax professional in advance.

It's also good to be aware that there can be significant variations in property tax rates within St. Louis. Even within the same city, effective rates can differ by zip code; for example, the 63137 area can have rates as high as 2.18%, while the 63131 area may be as low as 1.11%. This is why it's important to check the actual property tax bill for a specific address rather than relying solely on the city average. Additionally, when obtaining landlord insurance, it's important to note that it includes coverage for rental loss and liability to tenants, which can result in higher premiums that should be factored into your budget.

This article is not investment or legal advice, and tax rates and rental laws can vary by county and property location, so it is recommended to consult with a real estate professional and accountant before finalizing any contracts.