How it works
How the Iowa Legislature works
A plain-language guide: who the legislators are, how an idea becomes a law, and where you can take part.
The basics
Iowa’s Legislature is officially called the General Assembly.
legislators in two chambers. Each Senate district is made up of two House districts.
House members, called Representatives. Elected every 2 years.
Senate members, called Senators. 4-year terms; half are elected every 2 years.
per General Assembly, each with a number. The 92nd begins in January 2027. Each year is one session.
When they meet
Sessions start on the second Monday in January and usually run into spring. Lawmakers aim to finish in about 110 days in the first year and 100 in the second. That’s when their daily expense payments stop, though sessions can run longer.
Year one vs. year two
A bill keeps its number for the whole General Assembly. Bills still alive at the end of the first session carry over to the second. When the General Assembly ends, every unfinished bill dies and must start over.
How a bill becomes law
Every bill follows the same path. Most don’t make it to the end.
- 1
Someone has an idea
A legislator, a committee, the governor, or a state agency asks for a bill. The Legislative Services Agency, a nonpartisan staff office, writes it in legal language.
- 2
The bill is introduced
It gets a number, like HF 437 (House File) or SF 519 (Senate File), and is sent to a committee. Committees can also start with a study bill (HSB or SSB), which gets a new number if it advances.
- 3
A subcommittee takes a first look
The committee chair picks a small group, usually three legislators, to hold a public meeting on the bill. They recommend passing it, changing it, or letting it go.
You can attend and speak at these meetings - 4
The full committee votes
If a majority of the committee approves, the bill goes on the list for debate by the whole chamber. If not, it usually stops here.
First funnel deadline happens here - 5
The whole chamber debates and votes
Legislators can offer amendments. To pass, a bill needs a majority of all members: 51 of 100 in the House, or 26 of 50 in the Senate.
- 6
The other chamber does it all again
Subcommittee, committee, and floor vote, all over again in the second chamber.
Second funnel deadline happens here - 7
Both chambers agree on one version
If the second chamber changed the bill, the first must accept the changes. If they can’t agree, a small conference committee from both chambers works out a compromise.
- 8
The governor decides
The governor can sign it, veto it, or, for spending bills only, veto individual items. During session, the governor has three days (not counting Sundays), or the bill becomes law without a signature. For bills received in the last three days of session or after it ends, the governor has 30 days, and not acting counts as a veto. The Legislature can override a veto with a two-thirds vote of both chambers.
- 9
It becomes law
Most new laws take effect on July 1, unless the bill sets a different date.
Why most bills never get a vote
Iowa sets two deadlines each session, called “funnels.” Bills that haven’t moved far enough by each deadline usually can’t be debated that year.
Where you can take part
Go to a subcommittee meeting
They’re open to the public and often include time for comments. Notice is short, often about a day, which is why Funnel alerts you right away.
Contact your legislators
You have one Representative and one Senator. A short, specific message about a bill number goes a long way.
Watch the debate
House and Senate floor sessions are streamed online, and video is linked from each bill’s official history.
See who’s for and against
Registered lobbyists must declare whether their clients support, oppose, or are undecided on each bill. Funnel shows these on bill pages.