With a reverse mortgage the amount that can be borrowed is determined by an FHA formula that considers age, the current interest rate, and the appraised value of the home. Typically, the more valuable the home, the higher the loan amount will be, subject to lending limits.
To summarize the key differences, with traditional loans the homeowner is still required to make monthly payments, but with a reverse mortgage the loan is typically not due as long as the homeowner lives in the home as their primary residence and continues to meet all loan obligations. With a reverse mortgage no monthly mortgage payments are required, however the homeowner is still responsible for property taxes, insurance, and maintenance.