: It counts the massive "sunk costs" of buying, such as the initial down payment, closing costs, and the 5% to 6% agent commissions you pay when you eventually sell.
Most basic calculators only compare a monthly rent check to a monthly mortgage payment. Trulia’s model—developed and iterated upon by its economic research team—uses a multi-step net present value (NPV) calculation to account for the opportunity cost of your money. The engine weighs five distinct pillars:
: It aggregates mortgage principal and interest, property taxes, hazard insurance, and HOA fees, and factors in future inflation and rent appreciation.
To truly understand the power and the limitations of Trulia's Rent vs. Buy Calculator , it helps to break down how the model works, the hidden variables it accounts for, and why the math sometimes defies common wisdom. 🛠️ The Mechanics: How Trulia Computes the Math