Residential rental calculation
Many residential rental programs compare qualifying monthly rent with principal, interest, taxes, insurance and association dues, often called PITIA. The simplified formula is qualifying monthly rent divided by monthly PITIA. The lender determines what income and costs qualify.
A residential illustration
If qualifying monthly rent is $2,500, monthly principal and interest are $1,800, and taxes, insurance and association dues total $400, PITIA is $2,200. The ratio is $2,500 divided by $2,200, or about 1.14. These are illustrative property figures, not loan terms or an approval threshold.
Commercial income method
For commercial and larger multifamily properties, a lender may compare annual net operating income (NOI) with annual debt service. NOI is effective income minus operating expenses before debt payments. In a simplified illustration, $2,100 of monthly income after operating costs divided by $1,800 of debt service is about 1.17. Use matching time periods, and do not subtract the same cost twice.
Income needs support
A lender may use leases, an appraisal’s market-rent analysis, actual operating history or another permitted method. Short-term rental projections can be treated differently from long-term leases. Ask which income method applies before relying on a projected ratio.