What happens if I don’t fully use my mileage cap? Flux 14 May 2020 18:31 Updated Monthly mileage quotas expire at the end of each month. Unused mileage does not rollover to the following month. Related articles What happens if I go over my monthly mileage cap? How can I pay for Flux? When is my Flux subscription charged? What can I expect to see on my monthly bill? Where do I find my monthly bill? Comments 0 comments Article is closed for comments.