Unlimited Mileage vs. Capped Miles: Which Car Rental Saves More?

A car rental’s mileage policy can swing your total cost by hundreds of dollars. If you expect to average more than about 100–120 miles per day, unlimited mileage often saves more because it removes overage fees; for short, predictable routes, capped plans can be cheaper. The smartest move—and our default approach at Travel Beyond Boundaries—is to price the full trip: estimate miles, apply any per‑mile charges, and compare that to the unlimited add‑on. Below, we define both options, show the simple math, and give break‑even guidance and booking tips so you can choose confidently and avoid surprise charges.