A large safety deposit box that's 10 inches by 10 inches might be $50 to $165 each year. How much does a safety deposit box cost at a bank?Ī small 3-by-5-inch safe deposit box is usually around $10 to $60 per year. However, you'll likely need homeowner's insurance to protect your valuables since homes aren't as secure from theft or natural disasters as banks. Quick tip: If the process of renting out a safe deposit box seems too inconvenient, you may instead buy a safe deposit box and store it in your home.