Question 1

What is a good DTI ratio for a mortgage?

Accepted Answer

For conventional loans (Fannie Mae/Freddie Mac), lenders prefer a back-end DTI of 36% or below, though they may approve up to 45% with strong compensating factors (excellent credit, large down payment, significant reserves). FHA loans allow up to 43% back-end DTI, and up to 50% with compensating factors. VA loans use a 41% guideline but also apply a residual income test. The lower your DTI, the better your loan terms will be.

Question 2

What is the difference between front-end and back-end DTI?

Accepted Answer

Front-end DTI (housing ratio) = monthly housing payment (PITI: principal, interest, taxes, insurance) ÷ gross monthly income. Back-end DTI (total debt ratio) = all monthly debt payments (housing + car loans + student loans + credit card minimums + personal loans) ÷ gross monthly income. Lenders evaluate both, but back-end DTI is the primary qualifying metric. The 28/36 rule states that front-end should not exceed 28% and back-end should not exceed 36%.

Question 3

What debts are included in DTI calculation?

Accepted Answer

DTI includes all recurring monthly debt obligations: mortgage/rent payment, car loan payments, student loan payments (even if deferred -- FHA uses 1% of balance), credit card minimum payments, personal loan payments, child support/alimony, and any other installment loans. DTI does NOT include utilities, groceries, insurance premiums, cell phone bills, or other living expenses. Only minimum required payments are used, not full balances.

Question 4

How can I lower my DTI ratio?

Accepted Answer

To lower your DTI: (1) Pay off or pay down high-balance debts -- eliminating a car payment or credit card can drop DTI by 3-5 percentage points. (2) Increase your gross income through a raise, second job, or rental income. (3) Avoid taking on new debt before applying for a mortgage. (4) Request a smaller loan amount to reduce the proposed housing payment. (5) Make a larger down payment to reduce the mortgage amount and monthly payment. Even a 1-2 percentage point DTI reduction can make the difference between approval and denial.

Question 5

Does student loan debt affect my mortgage DTI?

Accepted Answer

Yes. Student loans are included in back-end DTI. For conventional loans, the actual monthly payment is used. For FHA loans, if your loans are in deferment or income-based repayment, lenders must use 1% of the outstanding balance as the monthly payment (even if your actual payment is lower). For VA loans, deferred student loans may be excluded if deferment extends 12+ months past the closing date. This is why FHA can be harder to qualify for when you have large student loan balances.

Loan Type	Front-End	Back-End	Notes
Conventional (Fannie/Freddie)	28%	36%	Best rates & terms
Conventional (max)	28%	45%	With strong credit/assets
FHA Loan	31%	43%	Up to 50% with compensating factors
VA Loan	N/A	41%	No front-end limit; residual income test
USDA Loan	29%	41%	Rural properties only
Jumbo Loan	28%	38%	Stricter underwriting

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