You Need a Six-Figure Income to Buy in St. Charles County

Myth #2 of 30

Most renters have a number in their head for how much money you need to make to buy a house. That number is usually too high. In a 2026 survey of renters, the typical guess was $88,000 a year. That was about 40% more than most of those renters actually made, so many of them had already decided buying wasn't for them.

If that sounds familiar, it makes sense. The news makes it sound like nobody can afford a house. But St. Charles County isn't California, and the math here is friendlier than you'd think.

How much do you need to make to buy a house?

There isn't one magic income. Lenders, the banks and mortgage companies that loan you the money, look at something called debt-to-income.

Debt-to-income compares what you owe each month to what you earn each month. Here's a simple example. Say you earn $5,000 a month before taxes. Your car payment, credit card minimum, student loan and new house payment add up to $2,000 a month. Your debt-to-income is 40%, because $2,000 is 40% of $5,000.

Depending on the loan, some lenders allow this to go as high as about 45% to 50%. So two people with the same paycheck can qualify for very different amounts, depending on their other bills.

Is St. Charles County affordable?

Compared to most of the country, yes. In July 2026, half the homes in St. Charles County sold for more than about $384,000 and half sold for less. That middle number is called the median. It was about 9% lower than the median for the whole country.

Meanwhile, the median household income here is about $104,700 a year, which is higher than the national median of about $80,700. Put those together and homes here cost about 3 times what a typical household earns. Across the country, it's closer to 4 times.

Lincoln and Warren counties have lower prices still. Some homes there may also qualify for USDA loans, a government-backed loan for rural areas that lets you buy with no down payment.

What if you make less than the median?

You still have choices. Not every first home is a $384,000 house. Townhomes, condos and smaller houses in places like Wentzville, O'Fallon, St. Peters, Troy and Warrenton often cost less. And there are programs that help with your down payment. We'll cover those in Myth #4.

Does making less money mean a worse loan?

Not on its own. Your interest rate, which is the extra cost the lender charges you for borrowing money, depends more on your credit score, your down payment and the type of loan than on your salary. A steady job, low debt and decent credit can look great to a lender, even with a modest paycheck.

How do you find your real number?

Get pre-approved. That means a lender looks at your income, debts and credit and tells you, in writing, how much they'd likely lend you. It's free, and it doesn't lock you into anything. Then you'll know what price range actually fits your budget.

Make it personal: get your free workbook

Reading about it is one thing. Knowing your own numbers is another. We made a free workbook for this topic, Your Income Workbook, that walks you through each idea in this post using your own situation. Sign up once and you'll get every workbook in this series as it comes out, right to your inbox.

Get your free first-time buyer workbooks

Want the full story? Watch my video: Can You Afford to Buy a House? Check These 4 Things