Michigan DUI License Penalties
First time offenders:
First time offenders face a 30 day suspension in the worst case. A DUI convinction for "operating while intoxicated" (OWI) carries a 30 suspension and 150 days restricted driving thereafter, e.g. to and from work, school, probation, etc.

With a plea to impaired, the driver faces 90 days restricted driving with no suspension.

Second offense:
A second offense within seven years of a prior conviction carries a mandatory revocation of at least one year. If the second offense falls outside seven years, it is treated as a first time offense for license sanctions.

Third offense:
If any three DUI convictions fall within 10 years of two other convictions, the driver's license is revoked for a minimum of 5 years.

Chemical Test Refusal
The first chemical test refusal results in a one year suspension. As opposed to a "revocation," a hearing is not required to obtain the license after the year has expired. A second chemical test refusal carries a two year suspension.