Estimated study time: 45 minutes
Content:
Mortgage lenders evaluate a borrower's ability to repay a loan using several qualification criteria, the most important being the debt-to-income (DTI) ratios. Two ratios are used: the front-end ratio (also called the housing ratio or PITI ratio) and the back-end ratio (also called the total debt ratio). The front-end ratio compares the monthly housing payment (Principal + Interest + Taxes + Insurance = PITI) to the borrower's gross monthly income. The back-end ratio compares total monthly debt obligations (PITI plus all recurring monthly debts such as car payments, student loans, credit card minimum payments, and other installment debt) to gross monthly income. Credit card balances and utilities are not included in the back-end ratio unless the minimum monthly payment appears on the credit report.
Conventional loan guidelines from Fannie Mae and Freddie Mac generally permit a front-end ratio of up to 28% and a back-end ratio of up to 36%, though automated underwriting systems often approve borrowers with ratios up to 45–50% for strong-credit-score borrowers with compensating factors. FHA guidelines are somewhat more permissive: standard ratios of 31% front-end and 43% back-end, with higher ratios possible using manual underwriting for borrowers with compensating factors (substantial reserves, significant down payment, low debt). VA loans do not use a front-end ratio; they use a single back-end ratio guideline (41%) plus a residual income test — the borrower must have a minimum amount of money left over each month after housing and all debt payments.
Lenders also evaluate the three Cs: Credit (credit score, credit history), Capacity (income stability and DTI ratios), and Collateral (property appraisal and loan-to-value ratio). FICO scores are the most widely used credit scoring model; conventional loans typically require a minimum 620 score, FHA requires 580 for 3.5% down (500–579 with 10% down), and VA and USDA have no minimum score requirement by program (though individual lenders may set "lender overlays"). Income is verified through W-2s, tax returns, and pay stubs; self-employed borrowers generally must provide two years of federal tax returns and a year-to-date profit and loss statement.
The appraisal is a key component of underwriting. The lender requires an independent appraisal to ensure the property is worth at least the purchase price (or refi amount). If the appraisal comes in low, the buyer may need to renegotiate the price, increase the down payment, or seek a second opinion appraisal. In Massachusetts, the appraiser must be a state-certified or state-licensed appraiser; the lender orders the appraisal independently (the buyer and agent may not select the appraiser). For FHA and VA loans, the appraisal also serves as a property condition inspection — the appraiser flags health and safety items that must be corrected before loan approval.
Key Terms:
Quiz Questions:
Q1. A borrower earns $6,000 per month gross. Their proposed PITI is $1,680 per month. They also have a $300 car payment and $200 in minimum credit card payments. What are their front-end and back-end ratios?
A) Front-end: 28%; Back-end: 36.7% B) Front-end: 35%; Back-end: 36.7% C) Front-end: 28%; Back-end: 36% D) Front-end: 30%; Back-end: 28%
Answer: A — Front-end: $1,680 / $6,000 = 28%. Back-end: ($1,680 + $300 + $200) / $6,000 = $2,180 / $6,000 = 36.3%, approximately 36.7% depending on rounding. Answer A is the closest match at 28% / 36.7%.
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Q2. A conventional loan applicant has a 580 credit score, 20% down payment, and DTI ratios within guidelines. What is the likely lending outcome?
A) Automatic approval — 20% down eliminates all credit score concerns B) Likely declined — most conventional lenders require a minimum 620 FICO for conventional loans C) Approved automatically through Fannie Mae guidelines at 580 D) Approved for an FHA loan only, regardless of down payment
Answer: B — Conventional loan programs (Fannie Mae/Freddie Mac) generally require a minimum 620 FICO score. A 580 score typically does not meet conventional standards, though some lender overlays vary. FHA loans allow scores down to 580 with 3.5% down.
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Q3. A veteran applies for a VA loan. The lender's underwriter calculates a 45% back-end ratio. The VA guideline is 41%. Is the loan automatically declined?
A) Yes — VA loans cannot exceed 41% back-end ratio B) No — VA residual income test results and compensating factors can allow higher ratios C) No — VA loans use only a front-end ratio; back-end ratio is irrelevant D) Yes — but the veteran may reapply with a co-borrower to lower the ratio
Answer: B — VA guidelines use 41% as a benchmark but also apply a residual income test. If the borrower passes the residual income test (sufficient monthly money remaining after all debts), the lender may approve the loan even above 41% with compensating factors. The VA program is more flexible than a rigid ratio cutoff.
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Q4. A property appraises for $380,000, but the buyer agreed to pay $410,000. What are the buyer's options?
A) The lender must fund the loan at the contract price of $410,000 B) The buyer must renegotiate the price with the seller, increase the down payment, or challenge the appraisal; the lender will base the loan on the lower of purchase price or appraised value C) The buyer automatically gets an FHA loan to cover the gap D) The seller must reduce the price to the appraised value by law
Answer: B — Lenders base the loan on the lower of the appraised value or purchase price. If the appraisal comes in low, the buyer must either negotiate a price reduction, increase the down payment to cover the gap, or challenge the appraisal with comparable sales. The seller is not legally required to reduce the price.
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Q5. In Massachusetts, who selects the appraiser for a purchase money mortgage loan?
A) The real estate agent selects the appraiser based on local knowledge B) The buyer selects the appraiser to ensure an unbiased opinion C) The lender independently orders the appraisal from a state-licensed or certified appraiser D) The buyer and seller jointly select the appraiser
Answer: C — Appraisal Independence Requirements under federal law (Dodd-Frank/CFPB) require lenders to order appraisals independently; buyers, sellers, and real estate agents may not select the appraiser or communicate with the appraiser to influence the value conclusion.
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