North Carolina and South Carolina are both members of the Drivers License Compact. This means that the SC courts will report the out of state traffic violation back to North Carolina. Pleading no contest is basically the same as a guilty plea and thus you pay a fine and are convicted of the traffic offense. This conviction of speeding is what will be reported to the NCDOT Division of Motor Vehicles.
We have read that points are only assigned for convictions occurring in state. Since laws can be changed or updated check with the NC DMV to find out for certain if points can or will be assigned for your South Carolina speeding ticket.
Even if points are not assigned to this out of state speeding violation, the infraction will be placed on your NC driving record. Once this traffic ticket is on your motor vehicle record (driving history), your insurance will be able to see it next time they pull your driving history. At that point, depending upon your insurance provider's rating system; it could affect your insurance premiums.
To find out how or if traffic tickets such as this will affect your auto insurance premiums, contact your insurance company and ask them about their rating system. You can also contact the North Carolina's insurance regulatory body, the NC Department of Insurance, with whom insurance companies must file their rates with.