Do Montana Businesses Have to Collect Sales Tax in Other States?
A Billings business that ships products nationwide may assume it never has to deal with sales tax because Montana does not impose a general statewide sales tax. That assumption can become expensive. Another state may require the business to register, collect tax from customers, file returns, and maintain exemption records. Understanding where you have sales tax nexus is the first step toward avoiding surprise notices and preventable penalties.
Montana’s lack of sales tax does not protect out-of-state sales
Montana does not have a general statewide sales tax. If your business makes a typical retail sale to a customer who receives the product in Montana, you generally do not add Montana sales tax. Certain Montana communities may impose local resort taxes on qualifying sales, however, so businesses operating in or delivering into those areas should verify the local rules.
The analysis changes when a customer receives a product or taxable service in another state. Sales tax is generally based on the destination of the sale, not the seller’s home address. A business located entirely in Billings may therefore have an obligation in Colorado, Washington, Wyoming, or another state even though it has no Montana sales tax account.
This issue commonly affects e-commerce stores, manufacturers, wholesalers, software companies, consultants, and contractors that cross state lines. It can also affect a small company that begins selling through Amazon, Etsy, Walmart Marketplace, Shopify, or its own website. The tax result depends on the state, the product or service, and the business’s connection to that state.
Sales tax nexus is the connection that creates an obligation
A state generally needs sufficient connection, known as nexus, before it can require a seller to collect its sales tax. Physical presence is one traditional source of nexus. An office, store, warehouse, employee, salesperson, installation crew, or inventory located in a state may create that connection. Even temporary activities, such as attending trade shows or sending workers to customer locations, can matter under some state laws.
Economic nexus can apply without any physical presence. Following the U.S. Supreme Court’s Wayfair decision, states may require remote sellers to collect sales tax after their sales into the state cross that state’s economic threshold. Most states with a sales tax have adopted some form of economic nexus, but their measurements and procedures are not identical.
Some states look primarily at sales revenue, while others may consider additional factors. The period being measured, included transactions, treatment of wholesale sales, and effective registration date can vary. Do not assume that one state’s threshold applies everywhere or that only taxable retail sales count toward the calculation. Confirm the current rules in each state where your sales are approaching a meaningful level.
A Montana company can also create other state tax obligations that are separate from sales tax. Employees, property, or substantial business activity in another state may lead to income tax, franchise tax, payroll, or business registration requirements. Registering for one tax does not automatically resolve the others.
What you sell matters as much as where you sell it
Physical products are commonly subject to sales tax, but every state defines taxable property and exemptions differently. Clothing, food, farm supplies, machinery, medical items, and shipping charges may receive different treatment depending on the state and facts. A product that is exempt in one state may be fully taxable in the next.
Services are even less uniform. Some states tax a broad range of services, while others tax only specifically listed categories. Digital products, software subscriptions, online courses, data processing, maintenance contracts, and bundled transactions can be particularly complicated. Calling something a service on the invoice does not necessarily make it exempt.
Business-to-business sales are not automatically exempt either. A wholesaler may avoid collecting tax when the customer provides a valid resale certificate, but the seller must usually retain appropriate documentation. Manufacturers, nonprofits, farms, and government buyers may also qualify for exemptions under certain state rules. The seller should collect and preserve the correct certificate rather than relying on an email or verbal statement from the customer.
If a transaction combines products and services, the way it is invoiced may affect its tax treatment. Separately stating labor, installation, freight, or support does not guarantee exemption, but unclear invoices make the analysis and documentation harder. Review your product catalog and invoice structure before configuring automated tax settings.
Marketplace sales and direct website sales need separate attention
Many states require marketplace facilitators, such as major online selling platforms, to collect and remit sales tax on marketplace transactions. This can remove much of the collection burden from the individual seller. It does not always eliminate every filing or registration requirement, and it does not mean those sales can be ignored when reviewing economic nexus.
The rules become more complicated when a Montana business sells through multiple channels. For example, Amazon may collect tax on marketplace orders while the business remains responsible for sales made through Shopify, phone orders, wholesale invoices, or an in-person event. Depending on the state, marketplace sales may still be included when determining whether the business crossed an economic nexus threshold.
Inventory stored by a marketplace or fulfillment provider can also create physical presence. Sellers using fulfillment programs may not control where their inventory is moved. Inventory placed in an out-of-state warehouse can create sales tax or other state filing concerns even if the business’s own staff never enters that state.
Do not assume a platform’s sales tax setting makes the entire business compliant. Confirm which party collects the tax, review marketplace reports, identify where inventory is stored, and reconcile platform-collected tax separately from tax collected through your own channels. Customers should not be charged twice, and marketplace tax should not be recorded as ordinary business revenue.
Build a practical multistate sales tax process
Start with a sales-by-state report covering all sales channels. The report should show customer destination, gross sales, exempt sales, marketplace sales, refunds, and the type of product or service sold. Review it regularly rather than waiting until tax preparation season. A state-by-state summary is only reliable if customer addresses and transaction categories are accurate.
Next, make a list of physical activities outside Montana. Include employees working remotely, contractors performing installations, leased equipment, inventory, offices, warehouses, trade shows, and regular customer visits. Then compare your physical and economic activity with current rules in the states involved. Because those rules change, use official state guidance or advice from a professional familiar with multistate compliance.
If registration is required, determine the correct effective date before collecting tax. Businesses generally should not charge a customer a line labeled as sales tax unless they are properly registered to collect it. Configure tax software carefully, test several transactions, and confirm that local rates and product taxability are being handled correctly.
Finally, create a filing calendar and reconcile each return to your books. Some states require returns even during periods with no taxable sales. Filing frequencies may also change as volume changes. Record tax collected as a liability rather than income, and keep returns, payment confirmations, exemption certificates, and sales reports together.
What to do if you may already have an obligation
If you discover that your business crossed a threshold or created physical presence in the past, do not immediately register in every state without first reviewing the exposure. Registration may alert a state to earlier periods, and the correct approach depends on when nexus began, whether tax was collected, the amount involved, and whether customers may have paid use tax themselves.
Some states offer voluntary disclosure or similar programs for businesses that come forward before being contacted. These arrangements may limit how far back the state looks or provide other relief, but eligibility and terms vary. A voluntary disclosure should usually be evaluated before contacting the state or submitting a standard registration.
Gather sales reports, marketplace statements, invoices, exemption certificates, inventory location records, and information about employees or contractors. Separate tax collected by marketplaces from direct sales. Good records allow an advisor to estimate exposure and identify where action is most urgent.
For ongoing planning, monitor sales before launching into a new state, hiring a remote employee, storing inventory with a fulfillment company, or beginning on-site work. Marlow Accounting can help Montana business owners organize their accounting records, evaluate sales-by-state reporting, and coordinate tax planning. Complex multistate matters may also require a state and local tax specialist or attorney.
A quick disclaimer
This article is general information and is not tax, legal, or accounting advice for your specific situation. Sales tax rules vary by state and change over time, so confirm the requirements that apply to your business. Call Marlow Accounting at (406) 290-1214 or schedule a free consult to discuss your situation.