Housing Ratio: At Least 20% Total DTI: Up To 51% Ratios will be based on total monthly household income. The Principal, Interest, Taxes and Insurance (PITI)/Housing Ratio must never be less than 20 percent. If the Principal, Interest, Taxes and Insurance (PITI) ratio is below 20 percent, the borrower is not eligible to receive any assistance from the City. The City of Clearwater only calculates a debt ratio, and it should not exceed 51 percent (based on monthly household income as determined by the City or its designee). With compensating factors, this ratio can be slightly increased, but all exceptions must be approved by the City of Clearwater housing assistant director prior to issuance of an approval letter.