Enterprise Rent-A-Car has launched its annual Plus Your Points promotion for all Enterprise Plus loyalty members.

From now through March 31, Enterprise Plus members who register for the promotion can earn double points on qualifying rentals, with additional opportunities to earn bonus points redeemable for free rental days, says Enterprise.

“The annual Plus Your Points promotion provides the opportunity for us to reward our loyalty members for their continued business, and help them accumulate even more points toward free rental days,” said Jim Stoeppler, assistant vice president, Enterprise brand marketing. “This year, we’ve extended the promotional window through March to allow participating members an extra month to earn points for their early spring travel.”

In addition to offering double points on qualifying rentals, this year’s promotion features other bonus point opportunities, including a one-time bonus of 20 points simply for registering for the promotion, points for using Twitter to share news about the promotion and points for referring friends to the Enterprise Plus loyalty program — who rent with Enterprise at least once during the promotion earning period.

Through Plus Your Points, Enterprise Plus members earn points that are redeemable at any time for free rental days on any available vehicle in Enterprise Rent-A-Car’s network of 6,000 participating neighborhood and airport locations throughout North America, including the United States, Canada and Puerto Rico. There are no blackout dates, and points do not expire as long as the member has one Enterprise rental during every two-year period.

The Enterprise Plus loyalty program is free to join and open to anyone at least 21 years old, says Enterprise. For more information, visit www.plusyourpoints.enterprise.com.