The typical security deposit amount owed when signing a new lease agreement is generally one to two months' rent. In many cases, it is equal to one month's rent, but in high-demand areas, luxury rentals, or for tenants considered higher risk, the deposit could be up to two or even three months' rent. State laws may also set limits on the amount landlords can charge for security deposits, with some states enforcing maximum deposit requirements. Additionally, factors such as the tenant's credit history, rental history, and local market conditions influence the exact deposit amount required.