Signup for National Emerald Club via the link above and you’ll automatically get Executive status through 2/28/20.
- Earn 1 rental credit for every qualified car rental. Free Rental Day = 6 credits
- Choose any car (Fullsize and above) in the Executive Area and only pay the Midsize rate (in US and Canada).
In the US and Canada you’re always guaranteed a free upgrade when you reserve using the Midsize rate.
Officially this is targeted to AMEX cardholders, but I was able to enroll with my Sapphire Reserve card, which gives free primary car rental insurance. AMEX cards only provide secondary coverage on rental cars unless you call to enroll in a program that costs $20/rental to upgrade the secondary coverage to primary coverage.
If you pay for a rental by 1/31/19 with an AMEX you will earn 6 rental credits which can be redeemed for 1 free rental car day on up to a full size car.
The free rental day expires 12/31 of the calendar year following the year in which the credits were earned.