Key figures
Iowa receivables
2026, with sources
SaaS: taxable, unless the buyer is a business
Iowa is one of the states that taxes software as a service outright, along with specified digital products and prewritten software; web hosting, which the Department treats as infrastructure as a service, is not taxed as SaaS. Iowa Code section 423.3(104) exempts all three when sold to a commercial enterprise for that enterprise’s exclusive use, with non-commercial use no more than de minimis. So the tax a SaaS company collects in Iowa depends on who its customers are: consumers and non-commercial buyers pay; businesses using it exclusively for business don’t.
“Commercial enterprise” is narrower than “business customer”. The Department lists for-profit businesses and manufacturers, insurance companies and financial institutions (nonprofit or for-profit), and professions and occupations; other nonprofits do not qualify, so SaaS sold to them is taxable.
The exemption is the buyer’s to claim, so the seller needs a completed Iowa sales tax exemption certificate on file for each exempt customer. Without one, the seller is liable for the tax it did not collect.
A $100,000 threshold measured on everything
Since July 1, 2019, remote sellers with $100,000 or more in gross revenue from Iowa sales must register and collect, and the Department counts all revenue sourced to Iowa — exempt sales, wholesale sales and marketplace sales included. There is no transaction-count test. That means a B2B software company can have Iowa sales tax nexus even when almost none of its Iowa revenue is taxable.
The test runs on the current calendar year. A seller that crosses $100,000 starts collecting on the first day of the next calendar month that begins at least 30 days later — cross it on September 15 and collection starts November 1 — and keeps collecting through the rest of that year and all of the next. Iowa is a Streamlined Sales Tax member state, so a multistate seller can register through the Streamlined registration system instead of GovConnectIowa.
State and local option tax
The state rate is 6%, and most Iowa cities and counties add a local option sales tax, which the Department administers and remote sellers collect alongside the state tax. Returns are monthly, due the last day of the following month and filed electronically, once a seller collects $1,200 or more a year; below that the return is annual, due January 31. Consider a Delaware company selling a $20-a-month consumer app: once its Iowa revenue passes $100,000, it charges 6% plus the local option rate where each customer lives. Unused customer credits eventually become unclaimed property reported to the Treasurer.
Deadlines
- Monthly, last day of the following monthSales and use tax return and payment, $1,200 or more a year (filed electronically)
- Annually, Jan 31Sales and use tax return, under $1,200 a year
The federal baseline
This page covers what Iowa adds. The federal rules underneath it apply here too.
Common questions
Do I charge Iowa sales tax on SaaS?
It depends on the customer. Iowa taxes software as a service, but exempts it when the buyer is a commercial enterprise using it exclusively in its business. A B2B SaaS company selling only to businesses collects little or no Iowa tax, but it should keep exemption certificates from those customers. A consumer app sold to Iowans is taxable.
Do exempt sales count toward Iowa’s $100,000 threshold?
Iowa counts gross revenue from all Iowa sales, including exempt sales and sales for resale. A B2B SaaS company with $150,000 of Iowa revenue, all of it exempt, has still crossed the $100,000 threshold — it has nexus, even if it owes little tax, and needs a permit to report.
Receivables next door
- MNMinnesota receivablesMinnesota charges 6.875% plus local taxes, still counts 200 sales toward nexus, and taxes prewritten software however it is delivered, which puts many SaaS products in scope.
- WIWisconsin receivablesWisconsin charges 5% plus county and Milwaukee city rates, counts only $100,000 of sales toward nexus, and doesn’t tax SaaS hosted on the vendor’s servers.
- ILIllinois receivablesIllinois doesn’t tax remotely accessed SaaS, but Chicago charges 15% on it; state nexus is now $100,000 of Illinois sales with no transaction count.
- MOMissouri receivablesMissouri’s economic nexus is $100,000 in taxable sales with no transaction test, and by regulation SaaS is not taxable. The state rate is 4.225% before local taxes.
- NENebraska receivablesNebraska keeps both tests — $100,000 or 200 transactions — and generally leaves access-only SaaS untaxed. The state rate is 5.5% plus up to 2% local.
- SDSouth Dakota receivablesSouth Dakota taxes services and products transferred electronically, SaaS included, at 4.2% plus municipal rates through June 30, 2027. Remote sellers register at $100,000.
Founder guides on this
- Sales taxSales tax nexus for startups: when you owe tax in a stateSince Wayfair, selling into a state can create a sales tax obligation. How economic nexus works, why SaaS is taxable in some states and when to register.
- RevenueDeferred revenue for SaaS startups, explainedAn annual prepayment is cash today and revenue over a year. How deferred revenue works under ASC 606, why it’s a liability, and the schedule behind it.
- StripeHow to reconcile Stripe payouts to your booksA Stripe payout is charges less fees, refunds and disputes, batched across days. How to book it gross, tie it to the bank, and keep revenue right.
More of the Iowa guide
- AccountingAccounting and state tax in IowaCorporate tax, conformity to federal rules, apportionment and what it does to your books
- PayablesPayables and contractors in IowaPaying vendors and contractors: 1099 filing, use tax, contractor tests and withholding
- PayrollPayroll taxes and employer rules in IowaWithholding, unemployment insurance, paid leave, minimum wage and the rules on paydays
- ComplianceCompliance and filings in IowaRegistering to do business, annual reports, franchise tax and the filing calendar
- AdvisoryAdvisory: credits and decisions in IowaCredits, incentives and the decisions that are cheaper to get right the first time
Sources
Checked against each agency’s own page on . Rates and thresholds change, usually on January 1.
- Iowa Department of Revenue — Permits, Filing Requirements & Local Option Sales Tax
- Iowa Department of Revenue — Remote Sellers & Marketplace Facilitators
- Iowa Department of Revenue — Filing Frequency & Return Due Dates
- Iowa Department of Revenue — Taxation of Specified Digital Products, Software, and Related Services
General information for US companies, not tax, legal or accounting advice for yours. Rules and thresholds change; confirm the specifics with a CPA or the agency before you act on them.