Assumed-Name (DBA) Registration Requirements in Idaho
At a glance
| Governing law and scheme | Idaho Code §§ 30-21-801 to -810 — mandatory statewide Assumed Business Names Act filing |
|---|---|
| Who must register | A filing entity or LLP using any name other than its true name; an individual or other business using a name that does not fully include every financially interested person's true name (§ 30-21-803) |
| Filing office | Idaho Secretary of State (§ 30-21-805) |
| Filing deadline | Before beginning to transact business under the assumed name; file a separate certificate for each name (§ 30-21-805) |
| Publication requirement | None. Part 8 requires filing with the Secretary of State but no newspaper notice |
| Filing fee | $25 base/online; paper filing adds a $20 manual-processing fee, for $45 total (official form) |
| Term and renewal | Effective upon filing until canceled; no expiration or renewal. Amend ownership, address, or materially misleading information within 90 days (§§ 30-21-807 to -809) |
| Name exclusivity | None. Filing is public disclosure and confers no exclusive right to the name (§ 30-21-802) |
| Penalty for noncompliance | Cannot maintain an Idaho court action until filing; a person who suffers loss may recover the loss, attorney fees, and costs. False, misleading, or incomplete certificates also count (§ 30-21-810) |
Requirements one by one
Who must file, and when
Idaho Code § 30-21-803(1) defines the filing trigger differently by business type. A filing entity or limited liability partnership uses an assumed business name whenever it uses a name other than its true name. For an individual or another type of business, the trigger is a name that does not include in full the true names of every person with a financial interest.
Under § 30-21-805, the certificate must be delivered to the Secretary of State before beginning to transact business under the name. Each assumed name requires its own certificate.
Certificate contents and fee
Section 30-21-806 requires the certificate to state the assumed name, every financial- or control-interest holder's true name and business address, the general type of business, and the required signatures. One agent may sign on behalf of everyone included on the certificate.
The Secretary of State's official form lists a $25 base filing fee. Filing the paper form adds a $20 manual-processing charge, making the paper total $45; filing online avoids that surcharge.
No publication, expiration, or renewal
The complete filing scheme in §§ 30-21-801 through 30-21-810 contains no newspaper-publication step. Under § 30-21-807, the certificate takes effect when filed and remains effective until canceled under § 30-21-809. There is no fixed expiration date or renewal filing.
Section 30-21-808 requires an amendment within 90 days after the identity or business address of a financial- or control-interest holder changes, or after the certificate becomes materially misleading in another way.
Noncompliance consequences
Under § 30-21-810, a person that has not complied cannot maintain an Idaho court action until the required certificate is filed. A person who suffers a loss because of the noncompliance may recover the amount of that loss, attorney fees, and costs. False, misleading, or incomplete certificate information counts as noncompliance too.
What trips people up
- An assumed name is not a new entity. Section 30-21-807 says the filing does not create a legal person separate from the owner or entity using it.
- The individual-name test is not surname-only. Section 30-21-803 looks for the full true names of all people with a financial interest in the business.
- A later entity filing does not make the assumed name exclusive. Section 30-21-802 says registration confers no exclusive right to use the name.
- Name acceptance and name ownership are different. Idaho Code § 30-21-804 imposes name-format limits, but compliance still does not create an exclusive right under § 30-21-802.
- Changes can matter even though there is no renewal. The certificate can remain in effect indefinitely, but § 30-21-808 still imposes the 90-day amendment deadline when ownership, addresses, or other material facts change.
Common questions
Can one agent sign for everyone listed?
Yes. Section 30-21-806 allows either each listed person's signature or one agent's signature on behalf of everyone included on the certificate.
Does the Act reach activity supporting a nonprofit purpose?
Yes. Section 30-21-803 defines transacting business to include activity likely to produce a financial benefit for the purpose of supporting a charitable, benevolent, or other nonprofit function.
How do I remove an assumed name after I stop using it?
Section 30-21-809 allows the user to file a certificate of cancellation with the Secretary of State.
Statutes and sources
- Idaho Code §§ 30-21-802 through 30-21-806 — public-disclosure purpose, no exclusivity, assumed-name definition and trigger, filing deadline, separate certificates, and certificate contents. § 30-21-802; § 30-21-803; § 30-21-805; § 30-21-806 (accessed 2026-07-25).
- Idaho Code §§ 30-21-807 through 30-21-809 — effect and duration, separate-entity disclaimer, 90-day amendment duty, and cancellation. § 30-21-807; § 30-21-808; § 30-21-809 (accessed 2026-07-25).
- Idaho Code § 30-21-810 — suit bar, loss damages, attorney fees and costs, and treatment of false, misleading, or incomplete information. Official statute (accessed 2026-07-25).
- Idaho Secretary of State, Certificate of Assumed Business Name — $25 base fee and $20 paper/manual-processing charge. Official form (accessed 2026-07-25).
Source links
Every statute quoted above, linked, with the date we checked it.
What does Idaho law mean for your facts?
You just read the general rule. Ask your own question and see which parts of current Idaho law apply to your situation, with citations you can check.
Opens in Ezel Pro.
- Starts from the statutes this survey is built on
- Cites every source it relies on, so you can verify it
- Chat, drafting and research in one workspace