Drink-driving limits in Iowa (2026)
Last reviewed: 29 October 2026
In short: The state sets a limit of 0.08% blood alcohol for ordinary drivers. Stricter rules apply to drivers under 21. Penalties are set in the state's impaired-driving statute.
| Rule | What applies |
|---|---|
| Blood alcohol limit for ordinary driversDriving after drinking alcohol | 0.08 % blood alcohol [1] |
| Lower limit for novice or young driversDriving after drinking alcohol | A person under 21 may not operate a motor vehicle with an alcohol concentration of .02 or more; the licence is revoked. [2] |
| Random breath tests without suspicionDriving after drinking alcohol | ⚠ Not yet verified |
| Maximum penaltiesDriving after drinking alcohol | First offence: a serious misdemeanour, with at least 48 hours and up to one year in jail and a fine of $1,250 (the court may waive up to $625 in set conditions). A second offence is an aggravated misdemeanour with at least 7 days and up to 2 years in jail and a fine of $1,875 to $6,250. [1] |
| Limit for professional or commercial driversDriving after drinking alcohol | A person is disqualified from operating a commercial motor vehicle if chemical testing shows an alcohol concentration of 0.04 or more (or the person refuses testing). [3] |
Notes
- The official sources read for this state do not state this. Not confirmed.
Sources
- Iowa Legislature: Iowa Code 2026, Section 321J.2 - Operating while under the influence of alcohol or a drug or while having an alcohol concentration of .08 or more (OWI) (consulted 29 October 2026) · all sources
- Iowa Legislature: Iowa Code 2026, Section 321J.2A - Persons under the age of twenty-one (consulted 29 October 2026) · all sources
- Iowa Legislature: Iowa Code 2026, Section 321.208 - Disqualification from operation of commercial motor vehicles (consulted 29 October 2026) · all sources
National rules that also apply
These rules are set at national level in the United States and apply here too, alongside the rules above. All national rules for the United States
| Limit for professional or commercial drivers | 0.04% alcohol concentration or more: a driver subject to commercial driver's licence rules must not report for or remain on duty performing safety-sensitive functions, and an employer who knows of it must not let the driver continue. (source: Electronic Code of Federal Regulations (Office of the Federal Register)) |
|---|
Iowa and neighbouring states
| State | Blood alcohol limit for ordinary drivers | Lower limit for novice or young drivers | Limit for professional or commercial drivers | Random breath tests without suspicion | Maximum penalties |
|---|---|---|---|---|---|
| Iowa | 0.08% | 0.02% (under 21) | 0.04% (commercial) | ⚠ Not yet verified | Min. 48 hours jail; $1,250 fine |
| Illinois | 0.08% | Zero (under 21) | 0.04% (commercial vehicles) | ⚠ Not yet verified | Class A misdemeanor (1st) |
| Minnesota | 0.08% | Any alcohol, under 21 | 0.04% (commercial vehicle) | ⚠ Not yet verified | Up to 7 years, $14,000 (felony) |
| Missouri | 0.08% | 0.02% (under 21) | 0.04% (commercial vehicle) | ⚠ Not yet verified | 1st: up to 6 months; fine up to $1,000 |
| Nebraska | 0.08% | 0.02% (under 21) | 0.04% (commercial vehicle) | ⚠ Not yet verified | Class W misdemeanour; 6-month revocation |
| South Dakota | 0.08% | 0.02% (under 21) | 0.04% commercial | ⚠ Not yet verified | Up to 1 year; $2,000 fine |
| Wisconsin | 0.08% | Zero (under 21) | 0.04% (commercial vehicle) | ⚠ Not yet verified | 1st: $150-$300 forfeiture |
More rules in Iowa
- CannabisPossession for personal use: Criminal offence · Growing at home: No
- Car speed limitsBuilt-up areas: 20 mph business, 25 mph residential · Outside built-up areas (single carriageway): 55 mph
- Minimum age for a car driving licenceMinimum age for a car licence: 16 (intermediate licence) · Earliest age to drive a car supervised: 14 (instruction permit)
- E-bikes and speed pedelecsLegal class: Class 1-3, a bicycle · Minimum age: Class 3: 16
- FireworksConsumers may buy and use category F2 fireworks: Yes (consumer fireworks) · Minimum age to buy: 18
- Knives and pepper sprayFolding pocket knives: Only an offence if used in a crime · Locking or one-handed knives: Ballistic knife: class D felony; switchblade listed
- Statutory minimum wageNational statutory minimum wage: Yes · Current adult minimum wage (gross): $7.25 per hour (or federal if higher)
- Using a mobile phone while drivingHolding a phone while driving banned: Banned · Hands-free use: Hands-free allowed
- Seat belts and child seatsSeat belt compulsory in front seats: Yes · Seat belt compulsory in rear seats: Under 18 only
- Tobacco and nicotine age limitsMinimum age to buy tobacco: 21 · Minimum age to buy e-cigarettes: 21
- Drinking age and alcohol salesMinimum age to buy beer and wine: 21 · Minimum age to buy spirits: 21
Related pages
General information, not legal advice. Rules change: check the official source before you fly or ride.