Credit card processing and merchant services in Iowa
Most taxable sales in Iowa carry the 1% local option tax on top of the 6% state rate, and surcharge limits come from Visa and Mastercard, not state law.
Card surcharges
Surcharging allowedNo Iowa statute limits credit card surcharges, so Visa's 3% and Mastercard's 4% caps and the debit card ban set the rules.
Sales tax
6% state, plus 1% local option
Last checked
October 6, 2026
Most taxable sales in Iowa carry 7%, not 6%. The state rate is 6%, and the Iowa Department of Revenue says an additional 1% applies to most taxable sales because many cities and counties impose a local option sales tax. The department publishes updates when jurisdictions start collecting it, and Coralville, Iowa City and North Liberty appear on its list of new impositions. If you open a second location, check its local option status rather than copying the first store's settings.
Iowa has no surcharge statute that we could find, and NCSL's table lists none, but that doesn't make every surcharge allowed. Visa limits it to your cost or 3%, Mastercard to your cost or 4%, debit and prepaid cards are off limits, and the surcharge has to be posted at your entrance and checkout and shown on the receipt.
A surcharge isn't the only lever, and for many small businesses it's not the best one. Take a shop running $30,000 a month on cards. Every 0.25% shaved off its effective rate is $75 a month, or $900 a year, and customers never see a thing. That's the case for interchange-plus pricing: you pay the card networks' actual interchange plus a disclosed markup, instead of a blended rate that hides the gap.
Clearo gives Iowa merchants a dedicated rep and month-to-month terms with no cancellation fee. Start with a free statement review; if you'd still rather pass the cost along afterward, our surcharging program handles the disclosures.
What Iowa merchants should know
Credit card surcharges in Iowa
We found no Iowa statute that bans or caps credit card surcharges, and NCSL's state table lists none. Visa caps a surcharge at the lower of your merchant discount rate or 3% and requires 30 days' written notice to your acquirer; Mastercard caps it at the lower of your average effective rate or 4%.
Neither network allows surcharges on debit or prepaid cards, and Visa requires notice at the point of entry and the point of sale plus the amount on every receipt.
Sources: NCSL, Credit or debit card surcharges statutes (table updated October 13, 2016); Visa, U.S. Merchant Surcharge Q and A; Mastercard, Credit card surcharge rules and fees for merchants
Sales tax and the local option tax
Iowa's sales and use tax rate is 6%. Many cities and counties add a 1% local option sales tax, and the Department of Revenue says the extra 1% applies to most sales subject to sales tax. The department publishes updates as new jurisdictions start collecting the local option tax.
Sources: Iowa Department of Revenue, Sales and use tax guide; Iowa Department of Revenue, Local option sales tax (LOST); Iowa Department of Revenue, Updates to Iowa local option (LOST) tax jurisdictions
Cities we cover in Iowa
Payment services we provide
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Common questions
Can Iowa businesses charge a credit card surcharge?
Yes, and Iowa adds no rules of its own. What applies are the card networks' limits: 3% on Visa, 4% on Mastercard, never more than your cost, never on debit. Visa also wants 30 days' written notice to your acquirer before you start, plus notice at your entrance and register and the amount on every receipt.
What sales tax rate should I charge in Iowa?
The 6% state sales tax, plus the 1% local option sales tax where your city or county has adopted it. The Iowa Department of Revenue says the extra 1% applies to most taxable sales, so for most locations the total is 7%. Check each location before you set up your POS terminals.
Is the local option sales tax charged everywhere in Iowa?
Not everywhere. It applies where a city or county has adopted it, and the Department of Revenue publishes updates when new jurisdictions begin collecting it, such as Coralville, Iowa City and North Liberty. Look up the local option status of each address where you sell.
Is interchange-plus pricing worth it for a small Iowa business?
For most businesses with steady card sales, yes. Flat-rate pricing charges the same percentage on a low-cost debit swipe as on a premium rewards card, so you overpay on the cheap transactions. Our comparison of interchange-plus and flat-rate pricing works through the numbers.
Other states we serve besides Iowa
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Disclaimer: general information, not professional advice
This page is general educational information, not legal, tax, accounting or financial advice. Rules and rates vary by place and change, so confirm them with the official source and a qualified professional before you act. Full terms are in our Terms of Service.
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