How Do Lenders Calculate Debt-to-Income Ratio in Minnesota?
A buyer called me from his home in Inver Grove Heights on a Thursday evening with a question that came from a genuinely frustrating experience. He had spoken with a lender two weeks earlier and had been told his debt-to-income ratio was too high to qualify for the loan amount he wanted. He had accepted this as a final answer and spent the two weeks since feeling deflated about his homebuying prospects. Then he had done some research on his own and had started to wonder whether the lender had calculated his DTI correctly. His rough math produced a ratio that seemed different from what the lender had told him, and he was not sure whether his calculation was wrong, the lender’s calculation was wrong, or whether he was simply using a different methodology than the lender. He was a high school math teacher, which meant he was more comfortable with the arithmetic than most buyers, but also meant he was more bothered by a number that did not add up than someone who might have simply accepted the lender’s result without question. “I am fairly certain I am doing this math correctly,” he told me. “But either I am missing something or the lender made an error. Can you walk me through exactly how lenders calculate debt-to-income ratio so I can figure out where the discrepancy is?” His instinct to verify the calculation was exactly right, and his question was one that deserves a genuinely precise and complete answer because the DTI calculation has specific mechanics that are not always obvious and that can produce different results depending on what the calculator includes or excludes. Here is the exact methodology. The Basic Formula and Its Two Components The debt-to-income ratio is calculated by dividing total monthly debt obligations by gross monthly income and expressing the result as a percentage. DTI equals total monthly debt obligations divided by gross monthly income. This formula has two components, the numerator representing debt and the denominator representing income, and each has specific rules about what is included and what is excluded. Understanding both components precisely is essential because an error in either one produces a DTI that does not reflect the actual qualifying ratio and that can lead to incorrect conclusions about qualification. The Income Denominator: What Counts as Gross Monthly Income The denominator in the DTI calculation is gross monthly income, which is the income before taxes, before retirement contributions, before health insurance deductions, and before any other pre-tax or post-tax deductions. This is the income before anything is taken out, not the take-home amount that appears in the borrower’s bank account after deductions. Many buyers make the mistake of using their net take-home pay rather than their gross income when estimating their DTI, which produces a higher DTI than the lender will actually calculate. For a buyer earning a gross annual salary of ninety-two thousand dollars, the gross monthly income is ninety-two thousand divided by twelve, which is seven thousand six hundred sixty-seven dollars. If this buyer’s actual monthly take-home after taxes and deductions is five thousand two hundred dollars, the DTI calculation uses seven thousand six hundred sixty-seven, not five thousand two hundred. The higher gross income figure produces a lower DTI ratio and a more favorable qualification picture. For borrowers with variable income, the qualifying income used as the denominator may be a calculated average rather than the current month’s income. The methodology for calculating qualifying income from employment, self-employment, rental income, and other sources was addressed in detail in earlier articles in this series. The key point here is that the denominator uses qualifying income as determined by the lender’s income analysis, which may differ from both gross income and take-home income depending on the income source. For multiple income sources that all meet their respective documentation and continuity requirements, the qualifying income from all sources is added together to produce the total qualifying income that serves as the denominator. The Debt Numerator: What Counts as a Monthly Debt Obligation The numerator in the DTI calculation is total monthly debt obligations, which includes specific categories of payment obligations and explicitly excludes others. The obligations that are always included in the monthly debt total are the minimum monthly payments on all revolving credit accounts, which means all credit card accounts regardless of whether the borrower pays the balance in full each month. A buyer with three credit cards with minimums of seventy-five, fifty, and one hundred twenty-five dollars has two hundred fifty dollars in revolving minimum payments included in the DTI calculation even if all three cards are paid to zero every month. Monthly payments on all installment loans are included, covering car loans, student loans, personal loans, and any other closed-end installment credit obligations. The payment amount included is the required monthly payment as shown on the credit report, which is the contractual payment rather than any amount the borrower may be paying voluntarily above the minimum. For student loans specifically, the treatment depends on the repayment status. Loans in active repayment use the actual monthly payment. Loans in deferment are handled differently by different programs. Most conventional loan programs under Fannie Mae guidelines require one percent of the deferred loan balance to be counted as the monthly obligation when no payment is currently required. FHA guidelines also generally require one percent of the balance for deferred loans. Some programs accept the documented income-based repayment amount for loans on income-driven plans, which can be significantly lower than one percent of the balance for borrowers with high loan balances relative to income. All existing mortgage payments on other properties are included in the monthly debt total. A buyer who owns a rental property and is applying for a mortgage on a new primary residence includes the existing rental property mortgage payment in the DTI calculation. Alimony and child support payments are included as monthly debt obligations when they are required by a court order or divorce decree. Voluntary