It is possible to change when the date your policy either starts or the date the payment is due. The way we would change this is by canceling your current policy and getting you a new quote for a policy with the requested start/payment date.
We recommend that you reach out to our support team so they can assist you with making sure that there is no lapse in coverage while doing this. You can get in touch with them by chatting with us on our website or by emailing support@nextinsurance.com!