Maryland’s implied consent law, Md. Code, Transp. § 16-205.1, means that by driving you have already agreed to take a chemical breath or blood test if you are lawfully arrested for DUI. You can still physically refuse — officers cannot force you — but refusal triggers an automatic license suspension of 270 days for a first refusal and two years for a second, and your refusal can be used against you in court. Taking the test and failing generally means a shorter 180-day suspension. There is no single right answer; the better choice depends on the facts, which is what makes this decision so hard to make at the roadside.
This is one of the few DUI decisions you may have to make alone, in minutes, without a lawyer. The trade-off is real on both sides: refusing denies the State a breath reading but guarantees a longer suspension and can look bad to a jury; taking the test can produce the strongest evidence against you, especially a high result. What follows is how Maryland’s rules actually work, so the trade-off is at least clear — not a blanket rule to always refuse or always blow.
What Implied Consent Actually Means
Under § 16-205.1, accepting a Maryland driving privilege means you have consented in advance to chemical testing if an officer has reasonable grounds to believe you were driving impaired. The test at issue is the evidentiary breath or blood test, usually administered at the station after arrest — not the small handheld device at the roadside.
Before that test, the officer must read you the DR-15 “Advice of Rights” form, which spells out the consequences of taking or refusing. If the officer fails to advise you properly, that failure can become an issue at your MVA hearing. The penalties for refusing are administrative — imposed by the MVA on your license — and they are separate from the criminal DUI case.
What Refusing Triggers
Refusal carries the heaviest administrative penalty: a 270-day suspension for a first refusal and a two-year suspension for a second or subsequent one. Those apply even if your DUI charge is later reduced or dismissed, because they flow from the refusal itself, not the conviction.
Refusal is not a separate crime in Maryland, but prosecutors can tell the jury you refused and argue it suggests you knew you were impaired. So refusing does not make the case disappear — it removes one piece of evidence (the BAC number) while adding another (the refusal). For the full breakdown of how refusal plays out on both the license and court sides, see our guide on refusing a breathalyzer in Maryland.
What Taking It and Failing Triggers
If you take the test and register 0.08 or higher, the administrative suspension is generally 180 days on a first offense — shorter than the refusal penalty — and a restricted license for work, school, treatment, or medical needs may be available. That is the upside of taking it: a shorter suspension and more flexibility to keep driving.
The threshold to watch is 0.15. At or above that level, the consequences harden: the only restricted-license option is a one-year ignition interlock, and the high reading becomes powerful evidence in the criminal case. A result of 0.15-plus is the scenario where simply taking the test does you the least good — and where the decision is genuinely close.
Voluntary vs. Mandatory: Know the Difference
Not every “test” at a DUI stop carries the same weight, and people often refuse the wrong one or submit to the wrong one:
- Field sobriety tests (walk-and-turn, one-leg stand, eye tracking) are voluntary. You can decline them politely.
- The roadside handheld breath test (the preliminary breath test) is generally voluntary as well and is used to build probable cause, not as the official evidentiary result.
- The post-arrest chemical test at the station is the one governed by implied consent. This is the test whose refusal triggers the 270-day suspension.
Declining the voluntary roadside tests does not carry the implied-consent penalty. It is the station test where the real decision — and the real consequences — live.
So — Should You? An Honest Framework
There is no rule that fits everyone, but a few honest considerations help:
- If you have had little or nothing to drink, taking the test may clear you — a low reading is your friend.
- If you expect a very high reading, some drivers weigh the longer suspension of a refusal against handing the State a 0.15-plus result. There is no free option here.
- A prior refusal or prior DUI raises the stakes of refusing again, because the penalties escalate.
- Whatever you decide, you can still request an MVA per-se hearing to challenge the suspension — but only within the deadline.
If you can reach a lawyer before deciding, do; most people cannot, and have to choose on their own judgment. Either way, the consequences reach beyond the suspension — a DUI or refusal also affects your insurance and employment. Decide with the full trade-off in view, not on the myth that refusing makes the problem go away.
Related Questions
- DUI vs. DWI in Maryland
- First-offense DUI penalties in Maryland
- Will I go to jail for driving drunk in Maryland?
- Can you refuse a breathalyzer in Maryland?
- DUI plea options and PBJ in Maryland
Already Made the Choice? Protect Your License Next
Whether you took the test or refused, the next decision — challenging the suspension and defending the charge — is one you do not have to make alone. A Maryland DUI lawyer can review how the stop and testing were handled, identify procedural errors, and act within the deadlines to keep you driving and limit the damage.
Toll-free: 1-877-566-2408. For the broader picture, see the complete Maryland DUI and DWI guide.
Last updated: May 2026.