If you’re exploring adjustable‑rate mortgages (ARMs), one of the most important concepts to understand is the mortgage rate cap - the built‑in safeguard that limits how much your interest rate can rise when the loan begins to adjust. These caps play a major role in how predictable your payments remain over time, especially in a changing rate environment. By learning how rate limits work and why they exist, you can make clearer, more confident decisions about whether an ARM fits your financial plans.