Virginia DUI Ignition Interlock Law Changes

Most people hear about ignition interlock through a Google search or a story from someone who had one. They want to know if it can be avoided. The answer can be hard to hear: if you are convicted of an alcohol-related DUI and want a restricted license, Virginia law requires interlock. That statutory condition cannot simply be negotiated away while the DUI conviction stands.

A first drug-only DUI is different: the court may require interlock as a condition of a restricted license. A second or later DUI triggers a separate mandatory requirement. Before trial, § 18.2-271.1(A) lets a person charged with DUI enroll in VASAP and install a device, with qualifying time credited toward a later requirement. We look at the evidence and your driving needs before advising whether early installation makes sense.

What Changed in Virginia’s DUI Ignition Interlock Law?

The rules below matter most to someone charged today.

• Installing before trial, with credit: § 18.2-271.1(A), as amended in 2025, lets “any person charged with a violation of § 18.2-266” enter VASAP “at any time prior to trial,” pre-qualify, and install an interlock. That time counts toward the interlock or restricted-license period after a conviction. The statute has no first-or-second-offense limit.
• What did not change: § 18.2-270.1(B) has long made interlock mandatory for an alcohol DUI (clauses (i) and (ii) of § 18.2-266) and for alcohol and drugs combined (clause (iv)). For a first offense under clause (iii), drugs, or clause (v), the per se drug levels, the court “may, for a first offense,” make an interlock a condition of a restricted license. A second or later offense still requires one.
• A restricted license during the 60-day suspension (July 1, 2026): a driver whose license is administratively suspended after being charged with a second offense may now petition the general district court for a restricted license with an interlock under § 46.2-391.2(A), and that installation time also counts later.

Some summaries, including DMV’s DUI brochure and VASAP’s FAQ, still describe an interlock as required for every first offense. For a drug-only first offense, the statute has long said “may.”

What Is an Ignition Interlock Device in a Virginia DUI Case?

Virginia defines an ignition interlock as a device that “(i) connects a motor vehicle ignition system to an analyzer that measures a driver’s blood alcohol content; (ii) prevents a motor vehicle ignition from starting if a driver’s blood alcohol content exceeds 0.02 percent; and (iii) is equipped with the ability to perform a rolling retest and to electronically log the blood alcohol content during ignition, attempted ignition, and rolling retest.” A rolling retest is a test at random intervals while you drive. If you fail it or don’t take it, the horn sounds and the lights flash.

The device measures alcohol only. In practice, it is a breath test you take every time you start the car and again on the road, with every result saved in a log that VASAP reviews.

When Does Virginia Require an Ignition Interlock?

The interlock rule depends on the conviction. In each case below, the interlock comes with a restricted license or with getting your license back:

If a court leaves out an interlock the law requires, DMV enforces it anyway (§ 46.2-391.01). For a first offense, the interlock is a condition of the restricted license, so a first offender who doesn’t take a restricted license is not ordered to install one; DMV’s reinstatement guide says it will not require an interlock at the end of the one-year revocation in that case. A first-offense conviction takes away your privilege to drive for one year (§ 18.2-271).

There is one narrow exception for work. A court may expressly permit you, at your employer’s request, to drive a vehicle your employer owns or provides without an interlock, solely in the course of your employment. It never covers a school bus, school vehicle or commercial motor vehicle, or an employer you own or control (§ 18.2-270.1(I)).

Can You Install an Ignition Interlock Before Trial in Virginia?

Yes. Section 18.2-271.1(A) says that “any person charged with a violation of § 18.2-266 … may, at any time prior to trial, enter into an alcohol safety action program in the judicial district in which such charge is brought or in any other judicial district. Any person who enters into such program prior to trial may pre-qualify with the program to have an ignition interlock system installed on any motor vehicle owned or operated by him and may have such ignition interlock system installed.”

That applies to any DUI charge, whatever your record. The process runs through VASAP: you enroll with the local program, pre-qualify, then choose a certified interlock company from the Commission on VASAP’s list (§ 18.2-273.9(E)) and schedule the installation.

Will Pretrial Ignition Interlock Time Count if You Are Convicted?

Yes, if you install through the program. The statute says: “Any installation period of time accrued by such person prior to trial for the pending charge shall count toward any (i) ignition interlock or restricted license period of time ordered by a court or (ii) restricted license, suspension, or revocation issued by the Department of Motor Vehicles pursuant to § 46.2-389.”

So a person who installs months before trial may have much of the 12-month interlock period behind them by the time of sentencing. The time counts only toward the pending charge, and only if the device was installed through VASAP.

Does Installing an Interlock Mean You Are Pleading Guilty?

No. Entering VASAP and installing an interlock before trial is not a plea, and the case still goes forward on the evidence. We can still challenge the stop, the arrest and the breath or blood test. Early installation is a practical decision about driving and timing, and we make it with you after we have looked at the evidence.

How Long Is Ignition Interlock Required After a Virginia DUI?

The standard period is “not less than 12 consecutive months without alcohol-related violations of the interlock requirements,” and it cannot run longer than the period of license suspension and restriction (§ 18.2-270.1(B)). For an adult first offender, the court may, on the offender’s motion, set “a minimum of six consecutive months without alcohol-related violations of the interlock requirements if additional restrictions are ordered for the duration of the restricted license” (§ 18.2-270.1(C)).

The clock starts on the date the court issues the restricted license. It is tolled, or paused, between the end of the court’s restricted license and the date DMV issues its restricted license. Because the period is measured in consecutive months without alcohol-related violations, a violation affects how long you keep the device. DMV’s reinstatement guide mentions a six-month minimum for a first offense; the statute’s default is 12 months, and six is available only on your motion with added restrictions.

What Happens if There Is an Interlock Violation?

VASAP’s FAQ lists what it treats as violations: “positive BAC’s on breath tests, failing to submit to a test when required, failing to report to the vendor’s service center for required appointments, tampering with the interlock device, circumvention of the camera, and driving a vehicle not equipped with an interlock device.” It adds that “All violations will be reported to your ASAP case manager resulting in an extension of your interlock requirement and may result in your case being returned to court for non-compliance” (VASAP FAQ).

From there, the law gives the court several tools:

• Revocation of the restricted license: absent good cause shown, the court may revoke your driving privilege for failing to install the system on time or to have it monitored and calibrated (§ 18.2-270.1(F)). The court starts by mailing a notice to show cause at least 10 days before the hearing, and “Failure to appear in response to such notice shall of itself be grounds for revocation of such privilege” (§ 18.2-271.1(F)).
• Criminal charges: starting a car for someone who is required to use an interlock, tampering with or circumventing the device, or knowingly lending a car without one are each Class 1 misdemeanors (§ 18.2-270.1(G)). Driving in violation of a restricted license, or without an interlock DMV requires, is a Class 1 misdemeanor under § 18.2-272, and three such convictions within 10 years are a Class 6 felony.
• The 0.02 rule: while your license is restricted after a DUI, driving with a blood alcohol content of 0.02 percent or more is itself a violation of § 18.2-272(B).
• DMV revocation: a conviction under § 18.2-272 also brings an administrative revocation by DMV (§ 46.2-389; § 46.2-391(A)).

Before revoking a restricted license, the court mails a notice to show cause, so there is time to prepare. If VASAP reports a violation, call us before the hearing.

What Is VASAP and Why Does It Matter?

The Virginia Alcohol Safety Action Program runs the education and treatment side of a DUI case, and it supervises the interlock. The statute says the offender “shall be enrolled in and supervised by an alcohol safety action program” while the interlock is required. In practice, that means:

• Proof of installation: within 30 days of the court order (§ 18.2-270.1(F)).
• Monitoring and calibration: at least every 30 days by an entity approved by the Commission on VASAP, at your expense (§ 18.2-270.1(F)).
• Log reports: at least quarterly, a printout of every ignition, attempted ignition and rolling retest, “showing attempts to circumvent or tamper with the equipment” (§ 18.2-270.1(B)).
• Your choice of company: you choose the interlock company from the Commission’s certified list (§ 18.2-273.9(E)).

VASAP is also the route for pretrial installation. Without enrolling in the program before trial, the installation time doesn’t count.

What Happens if Your DUI Case Is Dismissed or Reduced?

The pretrial credit counts only toward an interlock, restricted-license, suspension or revocation period on the pending charge. If the DUI is dismissed, or reduced to an offense that carries no interlock requirement, there is nothing for the installation time to count toward, and you will have paid for the device in the meantime. That is not a reason to avoid early installation. It is one of the things we weigh with you before you decide.

What Factors Matter Before Installing an Interlock Early?

The same questions come up in every case:

• The charge: an alcohol DUI conviction always brings an interlock with a restricted license. For a first offense based only on drugs, § 18.2-270.1(B) says the court “may, for a first offense,” impose the condition, so whether pretrial installation will have practical value requires closer review.
• The evidence: if there are real questions about the stop, the arrest or the breath or blood test, we look at those first, because they decide whether a DUI conviction happens at all.
• Your driving needs: work, school, children and medical care. If you will need a restricted license after court, pretrial time shortens the period you have left.
• Your record: a second or later offense means an interlock on every vehicle you own and as a condition of getting your license back, and a second offense also brings a 60-day administrative suspension, during which you may now petition for a restricted license with an interlock.
• Cost and timing: installation plus monthly monitoring for months before trial, against the months you would otherwise spend with the device after court.

How Much Does an Ignition Interlock Cost in Virginia?

You pay the interlock company directly. Virginia’s interlock regulation, 24VAC35-60-50, lists these fees:

The court also charges a $20 fee “to cover court and administrative costs related to the ignition interlock system” (§ 18.2-270.1(B)). The Commission may raise installation and calibration fees by up to 25 percent only if a change in the law requires new device technology. Every service provider must keep an indigency fund, and providers “shall not deny service to any offender for whom there has been a declaration of indigency and approval by the commission.” If cost is a real obstacle, tell us; a court finding of indigency can reduce the fees.

Why Drivers Across Northern Virginia Call Us

Reckless driving and DUI defense are the core of our practice. Your case is handled by a specific attorney, supported by collaboration and insight from the rest of our team. Our attorneys regularly defend DUI cases in the courts of Northern Virginia.

In an interlock question, our work is to fit the device into the defense, not the other way around: deciding whether to install before trial, asking for the six-month period when it is available, arranging the restricted license and its purposes, and answering any violation report. Our Virginia DUI lawyer page covers the rest of a DUI case, our DUIs in Virginia page explains penalties at every level, our drug DUI page covers drug-only charges, and our DUI with a minor page covers the added penalty for a child in the car. For a specific county, see Fairfax County DUI, Prince William County DUI, first-offense DUI in Arlington and Loudoun County DUI.

Frequently asked questions

Talk to NOVADefenders About a Virginia DUI Ignition Interlock Issue

Before you pay to install a device, talk with us about your charge, your driving needs and the timing of your case. We can explain whether early installation offers a practical benefit and help you address the court, DMV and VASAP requirements.

Call 703.273.6431 at any hour and you will speak with a real person. The consultation is free, and you can also contact us online.