Iowa Sales Tax Calculator (2026) — Add or Reverse Tax
Iowa's combined sales tax rate is 6.94% (6.00% state + 0.94% average local). Use the calculator below to add Iowa sales tax to a price, or reverse a tax-included total to find the pre-tax price and exact tax amount.
How to use this calculator:
- Adding tax — enter a pre-tax price, pick "Add tax to price," and the calculator applies the Iowa rate to show the tax amount and final total.
- Reversing (extracting) tax — enter a total that already includes tax, pick "Extract tax from total," and the calculator divides by 1 + the rate to isolate the pre-tax price and the exact tax paid.
- Pick the rate that matches your situation: the average combined rate is a good statewide estimate, but the state-only or maximum-local rate is more precise if you know the exact city or county.
Understanding Iowa Sales Tax
Iowa's state sales tax rate is 6.00%, and local jurisdictions add an average of 0.94% on top, bringing the typical combined rate to 6.94%. Rates vary by city and county — the highest combined rate in Iowa can reach 8.00%.
Iowa also levies a state income tax, which shapes how much the state relies on sales tax revenue relative to other funding sources.
Groceries
Exempt from Iowa state sales tax.
Largest city
Des Moines
State income tax
Yes
Why Reverse Sales Tax Calculation Matters
Receipts, invoices, and marketplace payouts usually show only the tax-included total — not the pre-tax price. Reversing the calculation matters for bookkeeping (separating revenue from tax collected), expense reports (reimbursing only the pre-tax cost), and price comparisons (checking what an item actually costs before Iowa's tax is applied). Because dividing by (1 + rate) is not the same as simply subtracting the rate from the total, doing this by hand is a common source of errors — the calculator above handles it exactly.
Iowa Taxability at a Glance
🛒 Groceries
Exempt
👕 Clothing
Taxable
💊 Prescription drugs
Exempt
History & Rate Breakdown
Iowa first imposed a temporary 2% sales tax in 1934, made it permanent with a companion use tax in 1937, and has raised the rate in steps since — to 3% in 1967, 4% in 1983, 5% in 1992, and its current 6% in 2008.
Iowa's 6.94% average combined rate layers the 6% state rate with a Local Option Sales Tax (LOST), first authorized in 1985, that individual cities and counties can adopt by voter referendum up to a 1% cap. Cities that have adopted it, like Des Moines and Cedar Rapids, charge the full 7%, while areas without LOST stay at the base 6%.
Where the Money Goes
Iowa's LOST revenue is typically dedicated by the adopting city or county to specific local priorities — often property tax relief or infrastructure — decided at the ballot box, giving Iowa communities direct control over whether and how the extra 1% is spent.
Business Use Case: Registering & Collecting Iowa Sales Tax
A retailer shipping to a Des Moines address collects the full 7% (6% state + 1% LOST), while the same retailer shipping to a rural Iowa county that never adopted LOST collects only the base 6% — meaning Iowa sellers must check LOST-adoption status by delivery address, not just by county name.
Sales Tax Terms Glossary
Combined rate
The state sales tax rate plus any applicable local (city, county, or special district) rates — the actual rate charged at checkout in a given location.
Reverse sales tax
The process of working backward from a tax-included total to find the pre-tax price and the exact tax amount, using total ÷ (1 + rate) = pre-tax price.
Economic nexus
A sales threshold (in dollars, transaction count, or both) that obligates an out-of-state seller to collect and remit sales tax even without a physical presence in the state.
Marketplace facilitator
A platform (e.g. Amazon, Etsy, eBay) that collects and remits sales tax on behalf of third-party sellers under most states’ marketplace facilitator laws.
Real-World Example
A $500.00 purchase in Iowa at the average combined rate of 6.94%:
- Tax amount: $500.00 × 6.94% = $34.70
- Total price: $500.00 + $34.70 = $534.70
Iowa Sales Tax Compliance for Sellers
Remote and online sellers establish economic nexus in Iowa once they exceed $100,000.00 in annual sales (no separate transaction-count test). Once nexus is established, a seller must register with the state, collect Iowa sales tax at checkout, and file returns on the state's required schedule. Marketplace facilitators (Amazon, Etsy, eBay, Walmart) generally collect and remit on behalf of third-party sellers automatically.
Frequently Asked Questions — Iowa Sales Tax
What is the sales tax rate in Iowa?▾
Does Iowa tax groceries?▾
Does Iowa have a state income tax?▾
When do online sellers need to collect Iowa sales tax?▾
How do I calculate Iowa sales tax on a purchase?▾
How do I reverse Iowa sales tax to find the price before tax?▾
What is the formula to back out sales tax from a receipt in Iowa?▾
References & Sources
Rates last verified January 2026. Iowa sales tax rates and thresholds can change — always confirm current figures with the Iowa Department of Revenue before filing or invoicing. This tool is for estimation and educational purposes only and is not tax, legal, or accounting advice.
Jordan Hayes
Verified AuthorLead Content Editor & Personal Finance Specialist
Jordan Hayes is a personal finance content strategist with 9+ years building educational finance and health resources. He has written and fact-checked over 200 personal finance guides covering mortgage amortization, retirement planning, tax strategy, and budgeting. His work applies IRS publications, Federal Reserve data, and peer-reviewed research to make complex calculations accessible.