The break‑even point is the moment—usually expressed in months—when the cumulative interest savings from a new loan equal the upfront fees paid to refinance. It tells you whether a lower rate will actually improve your cash flow over the life of the loan.
Calculating this point requires accurate inputs: the current loan balance, existing interest rate, new rate, term length, and all closing costs. A reliable mortgage calculator aggregates these figures so you can see the timeline of net benefit or loss at a glance.