The difference between 1st, 2nd, and 3rd degree DWI comes down to how many aggravating factors were present at the time of the arrest: three or more prior qualifying incidents (or a prior felony DWI) make it first degree and a felony, two factors make it second degree, and one factor makes it third degree. Second and third degree are both gross misdemeanors, while first degree is prosecuted as a felony with prison time on the table. The degrees are not about how drunk you were on this one night — they are about the total count of statutory factors stacked against you.
How the Degree System Works
In states that classify impaired driving by degree, the charge depends on how many aggravating factors apply, not simply whether you were over the legal limit. Each factor counts as a point. More points, higher degree, harsher penalties. A driver with zero aggravating factors lands at the baseline. A driver with three or more faces the top felony charge.
This is why a first-time offender can still be charged with second or third degree DWI. If the BAC was extremely high, or a child was in the car, the factor is already there regardless of whether the driver has any prior record. That surprises people who assume “first offense” and “lowest charge” are the same thing. In a degree-based state, they are not.
First Degree DWI
First degree is the most serious impaired driving charge and the only one prosecuted as a felony. A driver faces first degree when any of the following is true:
- Three or more qualifying prior impaired driving incidents within the past ten years.
- A prior felony DWI conviction.
- A prior felony conviction for causing death or serious injury while impaired.
A first degree conviction can result in up to seven years in prison, fines up to $14,000, or both. Mandatory minimum sentences typically apply, and judges have limited room to go below them. The current arrest does not have to involve a crash or an exceptionally high BAC; the driver’s history alone is enough to put the charge at the top of the scale.
Second Degree DWI
Second degree sits in the middle. It is a gross misdemeanor, which is more serious than a standard misdemeanor but below felony level. The charge applies when two or more aggravating factors were present during the offense.
A common second degree scenario looks like this: a driver with one prior DWI inside the ten-year lookback gets pulled over and blows a 0.16. That is two factors — one prior plus a high BAC — and that combination produces a second degree charge. Penalties include significant jail time, license plate impoundment, vehicle forfeiture in some cases, and mandatory long-term monitoring through programs such as ignition interlock.
There is one shortcut into second degree worth knowing. A driver who refused a chemical test needs only one aggravating factor to be charged with second degree, because the refusal itself counts as an additional negative in the degree calculation.
Third Degree DWI
Third degree is also a gross misdemeanor, but it requires only one aggravating factor. The typical case is a driver with a single prior impaired driving incident inside the ten-year window who gets arrested again with a BAC between 0.08% and 0.15%. Other situations that reach third degree on a single factor:
- A first-time offender with a BAC of 0.16 or above.
- A first-time offender with a child under 16 in the vehicle (where the child is more than three years younger than the driver).
- A driver who refused a chemical test with no other factors present.
Despite being the lowest of the three charges the searcher is comparing, third degree still carries possible jail time, license revocation, mandatory alcohol assessment and treatment, and the financial fallout that follows any impaired driving conviction.
The Aggravating Factors That Decide the Degree
Because the whole degree system is built on counting factors, it helps to see them laid out. The recognized aggravating factors are defined by statute:
- Prior impaired driving incident. Any DWI conviction or impaired driving-related license revocation within the ten years before the current offense. Each qualifying prior counts separately, so a driver with two priors already has two factors before anything about the current arrest is considered.
- High blood alcohol concentration. A BAC of 0.16 or higher, measured at the time of the offense or within two hours of driving. This one factor alone is enough to push a first-time offender from fourth degree to third degree.
- Child passenger. A child under 16 in the vehicle at the time of the offense, where the child is more than three years younger than the driver.
Add them up for the arrest in question. One factor is third degree. Two is second degree. Three or more, or a qualifying prior felony, is first degree.
How Test Refusal Shifts the Degree
Refusing a breath or blood test does not get counted as a straight fourth aggravating factor; it moves the charge up one degree from where the other factors would place it. A refusal with one aggravating factor produces a second degree charge instead of a third. A refusal with no other factors produces a third degree charge instead of a fourth. That mechanic creates a strong incentive to submit to testing, separate from any administrative penalty for refusal.
Fourth Degree as the Baseline
States using the degree framework typically include a fourth degree below the three charges most people ask about. Fourth degree DWI is a standard misdemeanor and applies to a driver who is impaired with no aggravating factors — no priors within the lookback window, no high BAC, no child passenger. The classic first-time arrest with a BAC between 0.08% and 0.15% sits here.
Fourth degree still carries real consequences: fines, license suspension, mandatory alcohol education, and jail of up to 90 days. And a fourth degree conviction becomes an aggravating factor itself if the driver is arrested again within the lookback period, meaning the next offense automatically starts a degree higher.
Degree vs. Offense Number
Degree is not the same as offense count, and most states do not use the degree system at all. In an offense-count state, a “second offense DWI” simply means one prior conviction, and severity rides almost entirely on how many times you have been caught. The degree framework is more granular because it treats prior offenses as one factor among several.
The practical difference shows up at the extremes. In an offense-count state, a first-time driver with a 0.25 BAC and a child in the backseat is still charged as a first offense; the judge may push toward the harsher end of the statutory range, but the charge label itself does not change. In a degree-based state, that same driver walks into a third degree charge on the spot — two aggravating factors, higher mandatory minimums, and a more damaging record from day one, with no prior history required.
The lookback window matters too. In degree-based states the standard is ten years, so a DWI from eleven years ago does not count as a factor. Across all states, lookback periods run from five years to a lifetime, and the same driving record can produce a misdemeanor in one state and a felony in another depending on how far back the state looks.
If you are trying to figure out what you are actually facing, the sequence is straightforward: confirm whether your state uses degrees, count the aggravating factors present at your arrest (adjusting one degree up if you refused testing), and match the count to the charge. One factor is third degree, two is second, three or more is first.