What happens when your license is suspended and you need an interlock
A suspended license means you cannot legally drive. An interlock device (also called an ignition interlock) is a breath-testing machine wired to your car's ignition that prevents the engine from starting if it detects alcohol. Many states require an interlock as a condition of getting your license back after a suspension — especially after a DUI or DWI conviction. The device does not restore your license by itself; it is one step in a process that includes paying fees, completing programs, and filing paperwork with your state's Department of Motor Vehicles (DMV).
The exact steps and costs depend on why your license was suspended and which state you live in. A suspension for unpaid traffic tickets follows a different path than a suspension for a DUI conviction. This guide covers what you actually have to do, in order, and what to expect at each stage.
Key Takeaways
- You cannot legally drive on a suspended license, even with an interlock device installed — the device is only one part of the reinstatement process.
- An interlock device costs between $0 and $300 to install and $50 to $100 per month to monitor, depending on your state and the provider.
- Most states require you to complete a DUI education program, pay reinstatement fees, and show proof of insurance before your license is restored.
- The interlock monitoring period lasts anywhere from three months to three years, depending on your offense and state law.
- You must file paperwork with your DMV to formally request reinstatement — straightforward having the device installed does not automatically restore your driving privileges.
Why your license was suspended and what that means for reinstatement
License suspension reasons fall into a few broad categories, and each has different reinstatement rules. A DUI or DWI suspension is the most common reason an interlock is required. Other suspensions — for unpaid fines, failure to appear in court, or accumulating too many points — do not automatically require an interlock, but you still cannot drive legally until the suspension is lifted.
The key difference: a DUI suspension usually comes with mandatory interlock requirements written into the court order or state law. A suspension for unpaid tickets typically requires you to pay the debt and file a reinstatement request with the DMV. Some states stack requirements — you may need to pay fines, complete a DUI program, install an interlock, and show proof of insurance all at once.
Check your suspension notice or court paperwork to see which category applies to you. If you lost the notice, contact your state's DMV directly and ask for a printout of your driving record and the reason for suspension. This document will list every requirement you must meet before reinstatement.
How an interlock device works and what it costs
An interlock device is a small, handheld breath-testing machine connected to your car's ignition system. Before the engine will start, you blow into the device. If your breath alcohol content is below the legal threshold (usually 0.02 percent), the car starts normally. If the reading is above that level, the ignition locks and the car will not start. The device also requires rolling retests — random breath tests while you are driving — to prevent someone else from blowing into it and then handing over the wheel.
Installation typically costs $0 to $300, depending on your state and the interlock provider. Monthly monitoring fees range from $50 to $100. Some states cap these costs; others do not. You pay the interlock company directly, not the court or DMV. The total cost over a three-year monitoring period can reach $2,000 to $3,600. A few states offer reduced fees for low-income drivers, but you have to ask the interlock provider or your DMV about that option.
The device records every test result and sends reports to the court or DMV. If you fail a test, miss a rolling retest, or tamper with the device, the monitoring period may be extended or your reinstatement may be denied. The interlock company will notify authorities of any violations.
Steps to reinstate your license after suspension
Reinstatement is not automatic. You must complete each step in order and file paperwork with your DMV to formally request your license back. The timeline varies by state, but the general sequence is the same.
Step 1: Complete all court-ordered programs. If your suspension came from a DUI or DWI, the court usually orders you to complete a DUI education program (sometimes called a DUI school or substance abuse program). These programs range from one day to several weeks, depending on the offense and your state. You must finish this before you can move forward. The program provider will give you a certificate of completion; keep multiple copies.
Step 2: Install the interlock device. Once the court order or state law requires an interlock, you must have it installed by an approved provider in your state. Your DMV website lists approved vendors. Call ahead to confirm installation availability and cost. You will need to provide your vehicle identification number (VIN) and proof of insurance. The installation takes about one hour.
Step 3: Maintain a clean interlock record. Drive with the device installed and pass all breath tests for the required monitoring period — typically three months to one year for a first DUI, longer for repeat offenses. Do not miss rolling retests, do not tamper with the device, and do not attempt to start the car with alcohol in your system. The interlock company reports your record to the DMV monthly.
Step 4: Pay all fines and fees. This includes court fines, DMV reinstatement fees (usually $100 to $300), and interlock installation and monitoring costs. Some states require proof of payment before they will process your reinstatement request.
Step 5: Obtain proof of insurance. You must carry an SR22 form (a certificate of financial responsibility) or standard auto insurance. An SR22 is required after a DUI in most states and proves you have liability coverage. Your insurance company files the SR22 directly with the DMV; you do not file it yourself. If you do not have a car or cannot get insured, some states allow you to file an SR22 without a vehicle, though this varies.
Step 6: File your reinstatement request with the DMV. Once all the above steps are complete, contact your state's DMV in person, by mail, or online (depending on what your state offers) and request license reinstatement. You will need to provide your certificate of DUI program completion, proof of interlock installation and a clean monitoring record, proof of insurance, and proof of payment for all fines and fees. Some states require a written request; others have an online form. Processing typically takes two to four weeks.
What happens if you drive on a suspended license
Driving on a suspended license is a separate criminal offense in every state. The penalties include additional fines (often $500 to $1,000 or more), possible jail time, and an extended suspension. If you are caught, your case goes to criminal court, not traffic court. A conviction for driving with a suspended license can also affect your ability to get hired, rent an apartment, or obtain professional licenses.
Having an interlock device installed does not give you permission to drive. The device is part of the reinstatement process, but you are still legally suspended until the DMV formally restores your license. Wait for written confirmation from your DMV before you drive.
How long the interlock monitoring period lasts
The monitoring period — the time you must drive with the interlock device — depends on your offense and state law. For a first DUI conviction, most states require three months to one year of interlock use. A second DUI typically requires one to three years. Some states have fixed periods; others give judges discretion to extend the period based on your interlock record.
If you pass all tests and have no violations during the monitoring period, you can request removal of the device once the period ends. The interlock company will schedule a removal appointment, and you will receive a final report showing your clean record. You do not need to return to court; the removal itself signals the end of the requirement.
If you fail tests or miss rolling retests, the monitoring period may be extended. Some states add three to six months for each violation. Keep your interlock record clean to avoid delays.
Insurance and interlock: what you need to know
After a DUI suspension, most states require you to carry an SR22 form as proof of insurance. An SR22 is not a type of insurance; it is a document your insurance company files with the DMV certifying that you have liability coverage. Your insurance rates will increase significantly after a DUI — often by 50 to 100 percent or more — and will stay high for three to five years.
Some insurance companies will not insure drivers with a recent DUI. If you are denied by your regular insurer, look for high-risk auto insurance companies that specialize in DUI cases. These companies charge more but will write a policy and file the SR22. You must maintain continuous coverage; a lapse in insurance can trigger a new suspension.
The interlock device itself does not affect your insurance rates, but the DUI conviction does. Once your license is reinstated and the interlock is removed, your rates will gradually decrease over time, but the DUI will remain on your driving record for seven to ten years depending on your state.
Frequently Asked Questions
Can I drive to work or to the interlock appointment while my license is suspended?
No. A suspended license means no legal driving, even for essential trips. Some states offer a "work permit" or "hardship license" that allows limited driving to work or medical appointments, but you must request this separately from the DMV before your suspension takes effect. Having an interlock device does not grant you permission to drive.
What if I fail an interlock breath test?
One failed test does not automatically extend your monitoring period, but it is recorded and reported to the DMV. Multiple failures or a pattern of failed tests can result in an extended monitoring period or denial of reinstatement. If you fail a test, do not drive; pull over safely and contact the interlock company. Avoid alcohol entirely while the device is installed.
Can I remove the interlock device myself or have someone else remove it?
No. Tampering with or removing the device is a criminal offense and will result in additional charges, fines, and an extended suspension. Only an approved interlock provider can remove the device, and only after the monitoring period ends and the DMV approves removal. The company will provide a final report proving the device was removed properly.
What if I cannot afford the interlock installation and monitoring fees?
Some states offer fee waivers or reduced costs for low-income drivers, but you must request this from the interlock provider or your DMV. Contact your state's DMV and ask if a hardship waiver is available. If you cannot install the device, you cannot meet reinstatement requirements, and your suspension will remain in effect. Some legal aid organizations also help with DUI-related costs.
How long does reinstatement take after I complete all the steps?
Once you file your reinstatement request with the DMV, processing typically takes two to four weeks. Some states process faster if you file online. You will receive written confirmation of reinstatement by mail or email. Do not drive until you have received this confirmation in writing — the suspension remains in effect until the DMV formally lifts it.