Iowa sales & use tax.
The facts an advisor checks first — rate, nexus threshold, marketplace rules — with links to the controlling authority.
Iowa: rate, nexus & administration.
- State rate
- 6%
- Local rates
- A 1% local option tax applies in most jurisdictions
- Economic nexus
- $100,000 in sales · effective January 1, 2019The 200-transaction threshold was removed July 1, 2019.Controlling authority: Iowa Code § 423.14A(3)(a) ↗
- Marketplace facilitator
- Yes — effective January 1, 2019
- Streamlined (SST)
- Full member
- Administered by
- Iowa Department of Revenue ↗
What to watch in Iowa
- SaaS and specified digital products are taxable, with a notable exemption for purchases used exclusively by commercial enterprises.
- Many services are enumerated as taxable — service businesses need a line-by-line check, not an assumption of exemption.
Rates, thresholds, and taxability change mid-year — verify against the Iowa Department of Revenue before advising. In L3i, every determination is cited to the controlling authority.
The Iowa voluntary disclosure agreement.
Behind in Iowa? There’s a front door. The voluntary disclosure program lets a business settle unregistered-period exposure on defined terms — before the state finds it first. The terms that shape the client conversation:
Administered by the Iowa Department of Revenue ↗ · also reachable through the MTC multistate voluntary disclosure program. Program terms as of February 2026 — confirm current terms before filing. L3i pairs the exposure math with the filing itself — see exposure analysis & VDA services.
Iowa, in brief.
What is the economic nexus threshold in Iowa?
$100,000 in sales, effective January 1, 2019. The 200-transaction threshold was removed July 1, 2019. Once the threshold is crossed, remote sellers must register with the Iowa Department of Revenue and begin collecting.
What is the sales tax rate in Iowa?
The state sales tax rate is 6%. A 1% local option tax applies in most jurisdictions.
Do marketplace facilitators collect Iowa sales tax?
Yes — marketplace facilitators have been required to collect since January 1, 2019. Direct (non-marketplace) sales remain the seller’s obligation.
How does a remote seller register for Iowa sales tax?
Register with the Iowa Department of Revenue before collecting — a remote seller must register once it crosses the economic nexus threshold ($100,000 in sales). As a Streamlined Sales Tax member state, Iowa also accepts central registration through the SST system, which covers all member states in one application.
Does Iowa offer a voluntary disclosure agreement (VDA)?
Yes — the Iowa Department of Revenue administers a voluntary disclosure program with a lookback of 60 months (5 years). Penalties are generally waived; interest is generally still due. An advisor can approach the state anonymously before disclosing the client’s identity.
A page tells you the rule. The platform applies it — and remembers why.
L3i runs Iowa determinations against a deterministic rules engine, cites the controlling authority, and captures your firm’s judgment so the next Iowa question starts further ahead.
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