A first DWI in New Jersey: what it can result in

New Jersey does not grade a first DWI as a crime, and the mandatory element is not jail: it is 12 to 48 hours at an Intoxicated Driver Resource Center, six hours a day across two consecutive days. Instead of a license suspension the court orders forfeiture until an interlock is installed — and a driver who installs one voluntarily before conviction, having held a license in good standing, is not subject to the fine at all.

Start from what the statute forces and what it leaves to the judge. The floor here is 12 to 48 hours of detainment; up to 30 days at the court’s discretion. Everything above that floor is argued, and the same conviction can end up served in custody, on work release or as a condition of probation depending on the county and the judge. What no one can promise you is a sentence below the statutory minimum — that is not a question of persuasion.

Traffic offense under R.S. 39:4-50: 12 to 48 hours of detainment; up to 30 days at the court’s discretion, and a fine of $250 to $400 below 0.10, $300 to $500 above it. The range is set by N.J.S.A. § 39:4-50(a)(1)(i), (ii), and the figures on this page come from the statute rather than from a summary of it.

New Jersey ties the interlock term to your blood alcohol reading, not just to the fact of a conviction. Since 2024 you may fit a device voluntarily after arrest and before conviction, which can cut the fine and shorten the suspension. Skip it and the court must suspend your license indefinitely until you install one — the device is what gets you driving again. The device requirement and the criminal penalty are separate tracks: one is handled by the court, the other by New Jersey Motor Vehicle Commission, on the sentencing court order.