Yes, you can add a second driver to your Avis rental, though specific conditions and fees usually apply. The additional driver must be present at the time of pickup with a valid driver's license that they have held for at least one year. In 2026, the standard fee is roughly $13 to $15 per day (capped at a maximum amount for long rentals), but this fee is often waived for a spouse or domestic partner, or if you are renting on a corporate account. You can indicate your desire for an extra driver during the online booking process or add them at the counter. Adding a driver ensures they are legally covered by the rental's insurance and protection plans. If an unauthorized person drives the vehicle and an accident occurs, it can void your insurance coverage and leave you personally liable for the full value of the damages, so it is a crucial step for safety and peace of mind.