SC Hardship License With DUI Interlock: Night Shift Coverage Rules

South Carolina issues Route and Time Restricted licenses that allow driving to and from work during any shift window, including overnight hours. Your permit application specifies your exact work schedule and approved route — if you work 11 PM to 7 AM, those become your authorized driving hours along the documented path between home and workplace. The ignition interlock device requirement applies to every Route and Time permit issued after DUI suspension. South Carolina DMV requires IID installation before issuing the restricted license, with the device monitored through your entire suspension period. Your interlock vendor provides a certificate of installation that you submit with your Route and Time application. Your Route and Time permit activates after you've served the mandatory hard suspension period. First-offense DUI in South Carolina carries a six-month suspension with no driving privileges for the first 30 days. After that 30-day blackout, you can apply for the restricted permit with interlock installed and functional.

South Carolina requires continuous SR-22 filing for three years following your DUI conviction date. That clock starts the day the court enters your conviction, not when you install the interlock or receive your Route and Time permit. Most drivers miscalculate this window and file SR-22 longer than legally required. Your insurance carrier files the SR-22 certificate electronically with the South Carolina DMV. The filing must remain active and unbroken for the full three years. A single day of lapse — carrier cancellation, missed payment, policy termination — resets your filing requirement to zero and triggers a new suspension. The Route and Time permit requires SR-22 at application. You cannot get restricted driving privileges without proof of SR-22 insurance already on file with DMV. Your carrier must file the SR-22 before DMV will schedule your reinstatement appointment or issue the permit.

You qualify for a South Carolina Route and Time permit if you have verifiable employment requiring regular commuting. Night shift, swing shift, rotating shift schedules all meet the eligibility standard as long as your employer provides written documentation on company letterhead. Your employer letter must state your work location address, scheduled shift times, days of the week you work, and confirm that driving is required to reach the worksite. The letter must be signed by a supervisor or HR representative and dated within 30 days of your Route and Time application. South Carolina DMV does not accept unsigned letters or statements from family members who employ you. If your shift schedule rotates weekly or bi-weekly, your Route and Time permit can specify multiple authorized time windows. DMV allows this as long as your employer documentation clearly outlines the rotation pattern and you drive only during the specific hours listed on each day of that rotation.

South Carolina suspends your license for six months on a first-offense DUI. The ignition interlock requirement covers that entire six-month window, even though your Route and Time permit allows limited driving after the first 30 days. You cannot remove the device early just because you're only driving restricted hours. Your interlock device logs every startup attempt, every failed breath test, every rolling retest. South Carolina DMV monitors these reports monthly through your certified interlock vendor. Violations — failed tests, circumvention attempts, missed rolling retests — extend your suspension and can result in permit revocation. The interlock requirement for second or subsequent DUI offenses in South Carolina extends to two years minimum and four years maximum depending on conviction details and BAC level. Your Route and Time permit does not shorten this device period. The interlock stays installed until DMV issues a notice of completion tied to your full suspension term.

Most mainstream carriers — State Farm, Geico, Allstate, Progressive — will file SR-22 for existing customers but typically non-renew your policy at term after a DUI conviction. New DUI-SR-22 policies generally require the non-standard market: Bristol West, Dairyland, GAINSCO, The General, Direct Auto, Acceptance. South Carolina SR-22 insurance with an interlock requirement costs $150 to $280 per month depending on your age, county, and conviction class. First-offense standard DUI with no aggravating factors lands at the lower end. Aggravated DUI — BAC over 0.15%, minor in vehicle, or property damage — pushes rates 30% to 50% higher. Your SR-22 policy must cover the vehicle equipped with the ignition interlock device. If you change vehicles during your filing period, notify your carrier immediately and ensure the interlock is transferred and the SR-22 is updated to reflect the new VIN. Driving an uninsured or incorrectly listed vehicle violates both your Route and Time permit and your SR-22 filing obligation.

Driving outside your authorized hours or route while on a South Carolina Route and Time permit is treated as driving under suspension. That charge carries a new suspension, additional fines, and possible jail time. Your original DUI suspension continues separately. Law enforcement in South Carolina can verify your Route and Time permit restrictions in real time during a traffic stop. If you're pulled over at 3 PM on a Saturday and your permit only authorizes Monday through Friday 10 PM to 8 AM travel, you're outside your legal window and subject to arrest. Any new suspension triggered by Route and Time violations resets your SR-22 filing requirement. South Carolina DMV treats the new suspension as a separate offense requiring its own three-year SR-22 period starting from the new conviction date. Stacking violations can extend your total SR-22 obligation to six years or more.