Federal Mortgage Laws and Consumer Protection Regulations

Chapter 1

Federal Mortgage Laws and Consumer Protection Regulations

Course: Safe Mlo Prep
Subject: Safe Mlo Prep
Chapter: Mortgage Loan Origination Activities

OVERVIEW

MLOs must be able to calculate and interpret key financial ratios and figures throughout the underwriting, disclosure, and closing processes. The NMLS exam includes calculation questions — know the formulas, practice them, and understand what each ratio means for the borrower's qualification.

1. Debt-to-Income Ratios

Front-end ratio (Housing ratio):

• Formula: Monthly housing expense (PITI) ÷ Gross monthly income
• Conventional guideline: ≤ 28%
• PITI = Principal + Interest + Taxes + Insurance (and HOA if applicable)

Back-end ratio (Total debt ratio):

• Formula: Total monthly debt obligations ÷ Gross monthly income
• Conventional guideline: ≤ 36–45% depending on AUS
• Includes PITI + all other monthly debt payments

Example:

• Gross monthly income: $8,000
• Monthly PITI: $1,800
• Other monthly debts (car, student loan, credit card): $700
• Total monthly debt: $2,500
• Front-end DTI: $1,800 ÷$8,000 = 22.5%
• Back-end DTI: $2,500 ÷$8,000 = 31.25%