Real Estate Finance Math on the Florida Exam: Amortization, LTV, and Points

A separate post on this site covers the core math formula categories generally. This one focuses specifically on financing math, since it's a distinct cluster of calculations that trips up candidates who are otherwise comfortable with commission splits and prorations.

Loan-to-value ratio

Loan-to-value (LTV) is the loan amount divided by the property's appraised value or sale price, whichever is lower, expressed as a percentage. A $240,000 loan on a $300,000 appraised value is an 80% LTV. The exam tests this both as a direct calculation and as a concept tied to mortgage insurance requirements, since LTV above a certain threshold typically triggers a private mortgage insurance requirement on conventional loans.

Discount points

A discount point equals 1% of the loan amount, paid upfront to reduce the interest rate. The calculation itself is simple multiplication, loan amount times the point percentage, but candidates lose points by forgetting points are calculated on the loan amount, not the purchase price, which matters whenever there's a down payment involved.

Amortization basics

Florida exam questions on amortization tend to focus on the concept (how a fixed payment splits between interest and principal over time, with the interest portion shrinking and the principal portion growing each period) more than complex calculations. Knowing that early payments on a long-term loan are interest-heavy, and that the split shifts over time, answers most amortization-concept questions even without a full amortization table.

Qualifying ratios

Front-end and back-end qualifying ratios compare a borrower's housing expense, or total debt, to gross monthly income. These show up less often than LTV and points, but when they appear, the key is keeping the numerator (which debts get counted) straight, since the front-end ratio only counts housing costs while the back-end ratio adds in other recurring debt obligations.

Why financing math deserves separate drilling

Financing math uses different inputs (loan amounts, rates, ratios) than closing math (prorations, credits, and debits), even though both get lumped together as "real estate math" in casual conversation. Drilling them as separate categories, rather than one undifferentiated math bucket, makes it easier to recognize which formula a given question is actually asking for.