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Debt Ratios for Residential Lending

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Lenders use a ratio called "debt to income" to determine your maximum monthly payment after you have paid your other recurring loans.

How to figure the qualifying ratio

For the most part, conventional mortgage loans need a qualifying ratio of 28/36. FHA loans are less restrictive, requiring a 29/41 ratio.

The first number in a qualifying ratio is the maximum amount (as a percentage) of gross monthly income that can be applied to housing costs (including loan principal and interest, PMI, hazard insurance, taxes, and HOA dues).

The second number in the ratio is the maximum percentage of your gross monthly income which can be spent on housing expenses and recurring debt. For purposes of this ratio, debt includes payments on credit cards, auto loans, child support, and the like.

Some example data:

28/36 (Conventional)

  • Gross monthly income of $4,500 x .28 = $1,260 can be applied to housing
  • Gross monthly income of $4,500 x .36 = $1,620 can be applied to recurring debt plus housing expenses

With a 29/41 (FHA) qualifying ratio

  • Gross monthly income of $4,500 x .29 = $1,305 can be applied to housing
  • Gross monthly income of $4,500 x .41 = $1,845 can be applied to recurring debt plus housing expenses

If you'd like to calculate pre-qualification numbers on your own income and expenses, we offer a Mortgage Loan Pre-Qualification Calculator.

Just Guidelines

Don't forget these ratios are just guidelines. We'd be happy to help you pre-qualify to help you determine how large a mortgage loan you can afford.

America's Money Source can walk you through the pitfalls of getting a mortgage. Call us at (407) 898-7559.


America's Money Source

2306 Curry Ford Rd
Orlando, FL 32806