Iowa Motorcycle Laws: No Helmet Law, Lane Splitting and Fault

Iowa is one of only a few states with no helmet requirement, and its fault rule is more forgiving than the 50% bars in many neighboring states. This guide explains the main Iowa motorcycle laws and what they mean if you are hurt in a crash, with links to sources so you can check each point yourself.

Iowa motorcycle rules of the road

Licensing

Iowa requires a driver license with a motorcycle endorsement, or a motorcycle instruction permit, to operate a motorcycle on public roads. The Iowa Department of Transportation publishes a Motorcycle Operator's Manual with the rules and safety guidance.

Helmets and eye protection

Iowa has no motorcycle helmet law. Riders and passengers of every age may legally ride without one. Most summaries also say Iowa does not require eye protection, though one source disagrees, so check the Iowa DOT Motorcycle Operator's Manual before relying on any one source. The manual strongly recommends a helmet, eye protection and protective clothing.

Lane splitting and lane use

Iowa Code section 321.275 prohibits operating a motorcycle between lanes of traffic or between adjacent lines or rows of vehicles. Lane splitting and lane filtering are not allowed. A violation of that section carries a scheduled fine. Insurers often argue that a rider who was riding between vehicles is mostly or entirely at fault, so this rule can affect a claim.

Insurance

Iowa requires liability insurance of at least $20,000 for bodily injury to one person, $40,000 per accident and $15,000 for property damage. Iowa is a fault-based state with no required PIP. Those minimum limits can be small compared with a serious motorcycle injury, so check your own policy for uninsured and underinsured motorist coverage.

Iowa motorcycle accident law

The deadline to file is 2 years

Under Iowa Code section 614.1(2), a personal injury action must be brought within 2 years after it accrues. The same 2-year period applies to wrongful death claims, counted from the date of death. Property damage claims, such as damage to your motorcycle, have a longer deadline of 5 years under section 614.1(4).

Modified comparative fault

Under Iowa Code section 668.3, contributory fault does not bar recovery unless your fault is greater than the combined fault of the defendants, third-party defendants and people who have been released from the claim. Any damages you receive are reduced in proportion to your share of fault.

• 20% at fault: you can recover, reduced by 20%.
• 50% at fault: you can still recover, reduced by 50%, as long as the defendants' combined fault is also 50%.
• 51% at fault: recovery is barred.

As an illustration only, if damages are valued at $100,000 and a jury assigns you 20% of the fault, your recovery would be reduced to $80,000. Iowa measures your fault against all the defendants combined, so adding another responsible party can help you stay under the bar.

Several liability

Under Iowa Code section 668.4, joint and several liability does not apply to a defendant who is found to bear less than 50% of the total fault assigned to all parties. That means a defendant with a small share of the fault generally pays only that share. A defendant found 50% or more at fault can face greater exposure, so ask a lawyer how it affects your case.

Damages

Iowa does not set a statutory cap on compensatory damages in general personal injury cases. The caps that exist apply to medical malpractice claims.

Helmets and your claim

Because no Iowa law requires a helmet, going without one is not a legal violation, and a defendant generally has no statutory basis to cut your damages for that choice. An insurer may still argue that going without one made a head injury worse. Keep your helmet and eyewear after a crash and ask a lawyer how that argument would be handled in your case.

What to do after a motorcycle crash in Iowa

• Get medical care promptly and describe every symptom, even ones that seem minor.
• Photograph the scene, your bike, your gear and your injuries.
• Save camera footage from a helmet cam, a dash cam or nearby businesses.
• Keep your helmet, eyewear, jacket and damaged gear instead of throwing them away.
• Collect witness names and ask for the police report number.
• Do not discuss fault with the other driver's insurer until you have spoken with a lawyer.
• Write down your deadline and keep itemized bills and records.

When to talk to a lawyer

A free consultation can help you understand your deadlines, your insurance options and how the fault rule may be argued. If you decide to hire someone, confirm that the lawyer is licensed in Iowa, ask for the fee agreement in writing and understand how case expenses are handled before you sign.

Frequently asked questions