If you sell taxable goods, digital products, or services in Iowa, you need an Iowa sales tax permit from the Department of Revenue before you collect a dime of the state’s 6% sales tax. Registration is free, happens online through GovConnectIowa, and is required by law under Iowa Code 423.36.1Iowa Legislature. Iowa Code 423.36 – Permits Required to Collect Sales or Use Tax What follows is what the permit covers, how to get one, and the deadlines and penalties that apply once you do.
Who Needs a Permit
Anyone selling at retail in Iowa needs one, whether from a storefront, a trade-show booth, or an online shop shipping into the state. A physical location, warehoused inventory, or employees working in Iowa all create physical nexus and trigger the requirement.
Out-of-state sellers with no physical presence still need a permit once they hit economic nexus: $100,000 or more in gross Iowa revenue in either the current or prior calendar year.2Iowa Department of Revenue. Sales and Use Tax Guide That figure counts all sales into Iowa, taxable and nontaxable alike.
Each physical location you operate needs its own permit, and permits are not transferable between owners or locations.1Iowa Legislature. Iowa Code 423.36 – Permits Required to Collect Sales or Use Tax A retailer with shops in Des Moines and Cedar Rapids needs two.
Marketplace Sellers
If you sell only through a marketplace like Amazon or Etsy that collects Iowa sales tax on your behalf, you don’t need your own permit or file Iowa returns. A marketplace facilitator with $100,000 or more in Iowa sales must collect and remit the tax itself. The moment you also sell through your own website or at in-person events, though, you need a permit for those channels.3Iowa Department of Revenue. Remote Sellers and Marketplace Facilitators
Nonprofits
Federal tax-exempt status does not exempt a nonprofit from Iowa sales tax. Iowa treats nonprofits like any other buyer, so most of their purchases are taxable, and a nonprofit selling taxable goods or services needs a permit just like a for-profit retailer.4Iowa Department of Revenue. Iowa Tax Issues for Nonprofit Entities Private nonprofit educational institutions get an exemption on purchases used for educational purposes. Booster clubs, PTAs, and affiliated groups don’t automatically qualify.
What You’ll Collect
The state rate is 6%. Most Iowa jurisdictions add a 1% local option sales tax, so the effective rate on most transactions is 7%.2Iowa Department of Revenue. Sales and Use Tax Guide Your permit covers both.
The tax applies to tangible personal property, specified digital products, and roughly 75 categories of services. Iowa’s approach to services is the reverse of many states: a service is exempt unless the law specifically lists it as taxable. The listed services catch some sellers off guard, including janitorial and cleaning work, taxis and ride-sharing, gym memberships, software as a service, and dry cleaning.2Iowa Department of Revenue. Sales and Use Tax Guide The Department’s Sales and Use Tax Guide lists every taxable service category if you’re uncertain about your own.
How to Register
Registration happens at govconnect.iowa.gov. Create an account, then choose “Register a New Business” to start the application.5Iowa Department of Revenue. GovConnectIowa Have the following ready before you begin:
- Your Federal Employer Identification Number if you’re a corporation, partnership, or LLC. Sole proprietors can use a Social Security Number.6Iowa Department of Revenue. Business Permit Registration
- Full legal name, Social Security Number, and contact details for each owner
- The six-digit NAICS code that describes your business activity7Iowa Department of Revenue. Iowa Business Tax Permit Registration
- The date you expect to begin making taxable sales
There is no fee. You can receive your account number, IDR ID, and filing instructions through the portal in as little as one business day, though the mailed confirmation letter can take up to six weeks.6Iowa Department of Revenue. Business Permit Registration Check the issued permit against your records; errors create filing headaches later.
If you plan to sell to state agencies, the permit must be in hand before the sale. State agencies cannot buy from anyone without a current, valid permit.1Iowa Legislature. Iowa Code 423.36 – Permits Required to Collect Sales or Use Tax
Filing Schedule and Deadlines
Iowa uses two filing frequencies, assigned based on how much tax you collect:
- If you owe less than $1,200 in sales or use tax per calendar year, you file annually. The return and payment are due by January 31 for the prior calendar year.8Legal Information Institute. Iowa Code r 701-202.1 – Sales and Use Tax Return Filing
- If you owe $1,200 or more per calendar year, you file monthly. Each return and payment is due by the last day of the month after the reporting period.9Iowa Department of Revenue. Filing Frequency and Return Due Dates
Your application asks whether you expect to file monthly or annually based on projected volume.8Legal Information Institute. Iowa Code r 701-202.1 – Sales and Use Tax Return Filing If your actual collections turn out to be substantially different, the Department can reassign your frequency. All returns and payments go through GovConnectIowa electronically. When a due date lands on a weekend or state holiday, it shifts to the next business day.9Iowa Department of Revenue. Filing Frequency and Return Due Dates
Exemption and Resale Certificates
When a customer buys goods for resale rather than personal use, they can hand you an Iowa Sales/Use/Excise Tax Exemption Certificate so you don’t charge tax. To be valid, the certificate must be fully completed and in effect within 90 days of the sale.
You keep the certificate in your own records as proof the exemption was properly claimed. Don’t send it to the Department. A blanket certificate covers ongoing purchases from a repeat buyer and stays valid until revoked or until 12 months pass with no transactions between you.10Iowa Department of Revenue. Iowa Sales Use Excise Tax Exemption Certificate
One detail that catches buyers: if someone uses a resale certificate to buy tax-free and then uses the item personally rather than reselling it, the tax liability shifts to that buyer, not to you.
Penalties and Permit Revocation
Iowa’s penalties add up fast. A 5% penalty applies if you file late, and a separate 5% penalty applies if you fail to pay on time. Both can stack on the same return.11Iowa Legislature. Iowa Code 421.27 – Penalties If an audit uncovers underpayment, a 5% penalty applies to the deficiency.
Interest runs on top of penalties. For 2026, the Department charges 10% annually, roughly 0.8% per month, based on the average prime rate plus two percentage points.12Department of Revenue. IDR Announces Individual Income Tax and Interest Rates
The worst outcome is revocation. The Director of Revenue can revoke a permit if you fail to comply with Iowa tax laws, fall substantially delinquent on any state tax, or fail to file required returns.1Iowa Legislature. Iowa Code 423.36 – Permits Required to Collect Sales or Use Tax After revocation, you must pay all outstanding liabilities, file every missing return, and may need to post a bond before a new permit is issued. The Director can also impose a waiting period of up to 90 days before you’re allowed to resume taxable sales.13Legal Information Institute. Iowa Admin Code r 701-201.12 – Obtaining a New Permit After Revocation During that window, you’re effectively shut down.
Canceling or Changing Your Permit
A permit stays active until you cancel it or the Department revokes it. If you stop making taxable sales, cancel the permit and file all outstanding returns through the cancellation date. Skipping that step means the Department keeps expecting returns.6Iowa Department of Revenue. Business Permit Registration You can cancel online through GovConnectIowa or by submitting Iowa Business Tax Cancellation Form 92-034.
Two situations require canceling and re-registering rather than updating:
- A change of ownership. Permits don’t transfer, so the new owner applies fresh.
- A move to a different county. Relocating across county lines means canceling the old permit and registering for a new one at the new location.
The Department no longer reinstates canceled permits. If you cancel and later restart, you go through the full registration again.6Iowa Department of Revenue. Business Permit Registration
Records to Keep
Keep documentation of every taxable and nontaxable sale, every exemption certificate you accept, and every return and payment filed through GovConnectIowa. Iowa law does not set a single retention period specific to sales tax, but five to seven years is a practical floor. The Department can assess additional tax within three years of a return’s due date in most cases, and fraud or failure to file extends that window indefinitely, so longer retention is the safer choice.