Iowa rules your contractor website, phones and invoices must follow

Most online and phone rules a contractor faces are federal. Iowa has fewer state add-ons than some neighbors, and says so in plain statute text. This page covers what the Iowa Code, the Department of Revenue and the Department of Inspections, Appeals, and Licensing (DIAL) actually require, read in October 2026. For the national baseline see our guides on texting and the TCPA and recording business calls. To form the company first, see starting a service business in Iowa.

Does Iowa require a license number in my ads?

For some trades it does. Iowa Code section 105.25 says all written advertisements distributed in Iowa by a person who is in the business of designing, installing or repairing plumbing, HVAC, refrigeration, sheet metal or hydronic systems must include the contractor license number. The same section says only a person licensed under chapter 105 may advertise that they are licensed, and it makes fraudulently listing or displaying a license number a simple misdemeanor.

The statute says "written advertisements." A website page is written, so print the number on each service page and in the site footer, as well as on van lettering and flyers. DIAL issues these licenses through the Plumbing and Mechanical Systems Board, and licensed plumbing and mechanical contractors register through one combined application.

Other trades work differently. Construction contractors who earn at least $2,000 a year from construction register with DIAL under chapter 91C, and the state assigns a public registration number. The sections read for this page, plus the DIAL rule chapter on contractor registration, do not require that number in advertising, though registration records are public (91C.5). The registration application collects your business telephone number, and section 91C.3 says any change in the information provided shall be reported promptly. If you switch to a new main number or a call-tracking number, update DIAL too, so the public record matches the number on your site. Our Iowa contractor license guide lists each trade's state agency.

Can I record customer calls in Iowa?

Yes, when you are a party to the call. Iowa Code 808B.2(2)(c) says it is not unlawful for a person not acting under color of law to intercept a communication if the person is a party to it or one party has given prior consent. An unlawful willful interception is a class D felony under subsection 1.

The statute carries one limit. The one-party exception does not apply when the communication is intercepted to commit a criminal or tortious act, or any other injurious act, under federal law or the law of any state. For an ordinary service business recording calls for quality and scheduling, that limit is remote. The practical risk sits with callers in all-party states, who may be covered by their own law. A short announcement on your main line and in any AI receptionist greeting handles both. See the state-by-state recording table for the rest.

Does Iowa have its own telemarketing or text rules?

The sources read for this page show no separate Iowa do-not-call list or telemarketer registration. The Iowa Utilities Commission's Do Not Call page describes only the national registry run by the FTC and FCC, free to join and without expiration, and says registered numbers may still receive calls from charities, surveyors and companies with an existing business relationship.

What Iowa does add is enforcement. Under Iowa Code 714.16(15), the Attorney General may bring an action on behalf of Iowa residents under the federal telemarketing act of 1994 (Pub. L. 103-297) and use any enforcement option that Act provides. In practice the federal rules come with a state prosecutor. The Do Not Call, consent and quiet-hour rules in our TCPA guide are the ones to follow, and the state prosecutor can now use them.

When does an Iowa customer get three days to cancel?

More often than most owners expect. Iowa's door-to-door sales chapter, 555A.1, defines a door-to-door sale as a sale of consumer goods or services (bought primarily for personal, family or household purposes) of $25 or more in which the seller personally solicits the sale, "including those in response to or following an invitation by the buyer," and the buyer agrees at a place other than the seller's place of business. An estimate visit that ends with a signature at the kitchen table fits that definition even though the homeowner called you first.

When it applies, section 555A.2 requires a complete receipt or contract in the same language used in the sales pitch, showing the date, your name and address, and a ten-point boldface notice that the buyer may cancel until midnight of the third business day. Section 555A.3 adds an attached, detachable Notice of Cancellation form in duplicate. Refunds are due within ten business days after you receive the cancellation.

The chapter has exclusions. It does not cover sales made entirely by mail or telephone with no other contact before the work, and it does not cover a buyer-initiated emergency where the buyer signs a handwritten statement describing the emergency and waiving the right to cancel. The visit-to-repair exclusion covers repairs to the buyer's personal property, and any additional goods or services sold on that visit are not excluded. Roofing, siding and other work on the house are real property, so do not assume that exclusion rescues you. Put the cancellation form into your online estimate and e-signature flow, not just the paper packet. The website or customer system that sends the quote is where the notice has to live.

What does an Iowa invoice have to separate for sales tax?

Iowa taxes services only when the law lists them, and the Department of Revenue's taxable services list is long. It includes landscaping, lawn care, tree trimming and removal, extermination, plumbing including drain cleaning, painting and papering, carpentry repair and installation, electrical repair and installation, carpet and upholstery cleaning, pet grooming and swimming pool cleaning. Janitorial and building cleaning is listed for non-residential property only. Snow removal is not taxable, though salt, sand and similar materials used in the work are. For painting, carpentry and electrical work, the department says services tied to new construction or remodeling are exempt while repair services remain taxable.

The department's landscaping and lawn care guidance says the total charge for lawn care is taxable whether you itemize or bill a lump sum, and that a lump-sum landscaping contract is taxable as a whole. It adds that a retailer's charges for nontaxable services are not taxable if contracted for separately or, with no written contract, itemized separately on the invoice. A company that mows in summer and plows in winter should keep two price lists and two invoice templates, and make sure the online payment page and the CRM add tax to the first and not the second. Providers of listed services need a sales tax permit before billing.

Whether a cleaning or repair job is taxable also depends on whether the property is residential. If your jobs cross categories, ask the department in writing. Our state sales tax comparison shows how Iowa sits against states that tax almost nothing.

Does Iowa's consumer data protection law apply to a small contractor?

Not unless your customer data is on a very different scale. Iowa Code 715D.2 applies to a person doing business in Iowa or targeting Iowa consumers who, during a calendar year, either handles the personal data of 100,000 or more consumers, or handles that of 25,000 or more consumers and more than half of its revenue comes from selling that data. The chapter was enacted as Senate File 262 (2023 Acts, chapter 17), and section 10 of that Act set the effective date at January 1, 2025. It also exempts data about individuals acting as employees, applicants or contractors within that role.

Enforcement belongs to the Attorney General alone. Under 715D.8 the office must first send a 90-day written notice that lets the business fix the problem, the civil penalty cap is $7,500 for each violation, and private lawsuits under the chapter are barred. A contractor with a customer list in the thousands is far under the line. A marketplace that resells those customers' contact details is not, which is one more reason to keep your own list, as our own your leads page argues.

How to set up an Iowa site, line, receptionist and inbox

• Website: Plumbing, HVAC and related contractors show the license number site-wide. Every contractor keeps the DIAL record current. Online estimates for in-home sales carry the three-day cancellation notice.
• Phone line: Recording your own calls is fine under Iowa law; add the announcement for out-of-state callers. Keep sales calls and texts tied to the federal consent and quiet-hour rules.
• AI receptionist: It can answer, book and record with the announcement. Nothing in the Iowa sections read here limits an inbound answering service.
• Email: Iowa has no separate commercial email statute in the sections checked, so the federal CAN-SPAM rules govern your newsletters and quote follow-ups.
• Invoices and payments: Separate taxable lawn and tree work from non-taxable snow removal in the system that generates the bill.

This is general information, not legal or tax advice. Rules change; confirm with DIAL, the Department of Revenue or the Attorney General's Consumer Protection Division before acting.

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