
Most major rental car companies include a mileage allowance—typically 100 to 200 miles per day—in their standard contracts. Exceeding this limit results in per-mile overage fees, which can add up quickly. However, unlimited mileage is common for weekly rentals and one-way trips between major locations. The key is to read your rental agreement carefully before you leave the lot.
Rental companies use mileage limits to manage vehicle depreciation and maintenance costs. For a typical daily rental, you might see an allowance of around 150 miles. If you plan a long road trip, a daily limit could be restrictive. For example, driving from Los Angeles to Las Vegas is about 270 miles one way, easily exceeding a single day's allowance and incurring significant extra charges.
The best way to avoid surprises is to book a rental package that explicitly includes unlimited mileage. This is often the default for weekly reservations and for rentals picked up at airport locations. If you're taking a one-way rental (dropping the car off at a different location), unlimited mileage is almost always included.
Always confirm the policy directly with the rental agent. Some smaller, independent rental agencies or those specializing in luxury cars may have stricter policies or lower daily caps. Here’s a quick comparison of typical policies from major companies:
| Rental Company | Standard Daily Mileage Allowance | Typical Overage Fee (per mile) | Unlimited Mileage Common On... |
|---|---|---|---|
| Enterprise | ~150-200 miles | $0.25 - $0.35 | Weekly rentals, airport rentals |
| Hertz | ~150-200 miles | $0.25 - $0.40 | Weekly rentals, most leisure rentals |
| Avis | ~150 miles | $0.30 - $0.40 | Weekly rentals, corporate accounts |
| Budget | ~150 miles | $0.30 - $0.40 | Weekly rentals, specific promotions |
| Alamo | Unlimited (on most rentals) | N/A | Most rentals, especially at airports |

It totally depends on the deal you book. I always look for the "unlimited mileage" option when I reserve online. If it's not listed, I call the location directly to ask. The last thing you want is a nasty surprise on your bill for going a few miles over. For a weekend trip, a couple hundred miles a day is usually fine, but for a real road trip, unlimited is the only way to go.

We drove a rental from Phoenix to the Grand Canyon and back last summer—a solid 500-mile round trip. We made sure to get an unlimited mileage weekly rate. The peace of mind was worth it. I’ve seen the overage fees; they can be like 35 cents a mile. That would have added over $100 to our trip for just one day of driving. Always, always check the contract fine print before you hit the road.

In my experience, standard corporate rentals typically include a generous daily allowance, often 200 miles, which suffices for most regional business travel. For extended projects requiring more driving, we pre-negotiate unlimited mileage with the rental provider to control costs. The primary concern is budgetary predictability. Overage fees are an unnecessary expense that can be avoided with proper planning and clear communication during the booking process.


