Wyoming Sales Tax and Invoicing Rules for 2026

TL;DR: Wyoming has a 4% state sales tax with local taxes adding up to 2% more, for combined rates up to 6%. Remote sellers exceeding $100,000 in sales or 200 transactions must collect. Wyoming has no state income tax, groceries are exempt, and most services and digital products are not taxable.

Wyoming offers one of the lowest combined sales tax burdens in the country, with a 4% state rate, modest local additions, and no state income tax. The state exempts groceries and most digital products, making it favorable for both consumers and technology businesses. This guide covers Wyoming's rates, nexus rules, invoice requirements, exemptions, filing deadlines, and penalties for 2026.

State sales tax rate

Wyoming levies a 4% state sales and use tax on the retail sale of tangible personal property and selected services. Counties can add a general purpose and specific purpose local option tax, with local additions typically ranging from 1% to 2%. Combined rates range from 4% to 6% depending on the county. Natrona County (Casper) and Laramie County (Cheyenne) both have combined rates near 6%.

Wyoming has no state income tax and no corporate income tax, making sales tax one of the primary state revenue sources alongside mineral extraction taxes. The relatively low sales tax rate compared to other no-income-tax states is notable.

Nexus rules

Physical nexus is established if you maintain a business location, employees, warehouse, inventory, or property in Wyoming. Storing goods in Wyoming fulfillment centers creates nexus as well.

Economic nexus applies to remote sellers exceeding $100,000 in gross revenue or 200 or more transactions from sales into Wyoming during the previous or current calendar year. Either threshold is sufficient. Wyoming is a member of the Streamlined Sales and Use Tax Agreement (SSUTA), providing centralized registration and compliance tools. Marketplace facilitators must collect and remit on behalf of their third-party sellers once the facilitator meets either threshold.

What must appear on invoices

The Wyoming Department of Revenue expects invoices to include:

• Seller's name, address, and Wyoming sales tax license number
• Buyer's name and address
• Date of sale
• Description of each item or service sold
• Quantity and sale price
• Sales tax shown as a separate charge
• Applicable combined state and county rate for the delivery location
• Total amount due including tax
• Exemption certificate number for exempt sales

Sellers must use the correct county rate based on the delivery destination for shipped goods. Wyoming provides downloadable rate tables and boundary files that sellers can integrate into their point-of-sale and invoicing systems.

Exemptions and special cases

Wyoming provides the following exemptions:

• Groceries (unprepared food for home consumption) are exempt
• Prescription drugs and medical devices
• Sales to federal, state, and local government entities
• Agricultural machinery and inputs used in farming and ranching
• Manufacturing equipment and materials consumed in production
• Mining equipment and materials used in mineral extraction
• Motor fuels (subject to a separate fuel excise tax)
• Livestock purchased for breeding, feeding, or dairy production
• Irrigation equipment used in agricultural production

Clothing is fully taxable in Wyoming with no exemption or reduced rate. Most services are not taxable unless they involve creating, repairing, or altering tangible personal property. Digital products delivered electronically are generally not taxable in Wyoming. SaaS is not currently taxed, making Wyoming a favorable state for technology and digital businesses.

Filing frequency and deadlines

Wyoming requires electronic filing through the Wyoming Internet Filing System (WYIFS). A 1.75% vendor compensation is available for timely filers, calculated on the tax collected and remitted on time. This discount provides meaningful savings for high-volume sellers. Returns are required for all periods even when no tax is collected.

Penalties for non-compliance

A penalty of 10% of unpaid tax applies for late filing, with a minimum of $25 per return. Interest accrues at 1% per month on outstanding balances. Operating without a sales tax license can result in a $500 penalty per month of unlicensed operation. Wyoming can also assess taxes for the full period of non-compliance and may revoke the sales tax license for repeated failures. Responsible officers can be held personally liable for unremitted trust fund taxes.

Frequently asked questions

Does Wyoming tax digital products or SaaS? No. Wyoming generally does not tax digital products delivered electronically or SaaS subscriptions. Prewritten software sold on tangible media (disc or USB) is taxable as tangible personal property. Electronically delivered software, streaming services, and cloud-based products are exempt, making Wyoming digital-business-friendly.

Are groceries exempt in Wyoming? Yes. Unprepared food for home consumption is exempt from Wyoming sales tax. Prepared food, restaurant meals, and food from vending machines are taxable at the full combined rate.

Is Wyoming a Streamlined Sales Tax state? Yes. Wyoming is a full member of the SSUTA, which provides simplified registration through the centralized system, uniform product definitions, rate lookup databases, and standardized compliance tools for multi-state sellers.