How to use this mortgage calculator

Enter the total home purchase price in the first field, your planned down payment in the second, the current interest rate in the third, and your preferred loan term (typically 30 or 15 years) in the fourth. Click Calculate to see your estimated monthly payment.

Note that this calculator shows principal and interest only. Your actual monthly payment will also include property taxes, homeowner’s insurance, and — if your down payment is less than 20% — mortgage insurance (PMI or MIP). Add approximately $200–$400 per month for taxes and insurance on a typical Southeast Michigan home purchase.

Common Michigan mortgage payment estimates

Based on a 7% interest rate and 30-year term — adjust the calculator for current rates and your specific situation:

• $250,000 loan: approximately $1,663 per month (principal and interest)
• $300,000 loan: approximately $1,996 per month
• $350,000 loan: approximately $2,329 per month
• $400,000 loan: approximately $2,661 per month
• $500,000 loan: approximately $3,327 per month

For a Bloomfield Hills or Birmingham jumbo purchase above $750,000, the calculator works the same way — enter the loan amount after your down payment and the rate Trevor quotes you.

Can I afford a $400k house in Michigan?

A common rule of thumb is that your monthly housing payment should not exceed 28% of your gross monthly income. At 7% on a 30-year loan, a $400,000 purchase with 5% down results in a loan of $380,000 and a principal and interest payment of approximately $2,529 per month. To keep housing below 28% of gross income, you’d need roughly $9,000 per month in gross income — or about $108,000 per year — before taxes and insurance are added.

At a $100,000 salary ($8,333 gross monthly), a $400,000 home is at the upper edge of affordability under standard guidelines. A 10% down payment lowers the loan to $360,000 and the monthly payment to approximately $2,395, making the math more comfortable.

Should I choose a 15-year or 30-year mortgage?

A 15-year mortgage has a higher monthly payment but significantly lower total interest paid over the life of the loan. A 30-year mortgage has a lower monthly payment but costs more in total interest. Use the calculator to compare both: enter the same loan amount and down payment, then change only the term from 30 to 15 years to see the payment difference.

For most buyers, the 30-year term provides more monthly flexibility. Paying extra principal voluntarily each month achieves much of the same benefit without locking into the higher required payment.

Get an accurate rate from Trevor Aspiranti

The calculator uses the rate you enter — which may differ from what you’ll actually qualify for. As a mortgage broker at Extreme Loans in Southfield, MI, Trevor Aspiranti shops rates across multiple wholesale lenders to find the most competitive rate for your credit score, down payment, and loan type. The actual rate Trevor secures often differs meaningfully from published averages.

Call Trevor at (586) 206-1390 or visit trevoraspiranti.com to get a real rate and a pre-approval. Serving Southfield, Bloomfield Hills, Birmingham, and all of Southeast Michigan.