Michigan Sales Tax Nexus Rules for E-Commerce Sellers (2026)

Michigan sales tax nexus guide

TL;DR: Michigan triggers sales tax obligations when you hit either $100,000 in revenue OR 200 transactions in the previous calendar year—whichever comes first. Marketplace sales count toward both thresholds, and you must register through the Michigan Department of Treasury once you exceed either limit.

Key Facts at a Glance

Detail	Info
Revenue Threshold	$100,000
Transaction Threshold	200 transactions
Threshold Logic	OR — Either threshold triggers nexus independently
Measurement Period	Previous calendar year (Jan 1 – Dec 31)
Marketplace Sales Count?	Yes
Registration Deadline	Typically early in the following year after threshold is exceeded

What Is Economic Nexus in Michigan?

Economic nexus is the legal requirement to collect and remit sales tax based on your sales volume into a state—not on whether you have a physical location there. Before economic nexus laws became standard across the country, online sellers could often operate in states without any sales tax obligation.

Michigan adopted economic nexus requirements to ensure that remote sellers, marketplace merchants, and other online businesses contribute to the state's tax base just like brick-and-mortar retailers do. Once your sales activity in Michigan crosses specific thresholds, you're legally required to register for a sales tax permit and begin collecting tax from customers.

This shift fundamentally changed e-commerce tax compliance. The playing field is now more level between online retailers and traditional stores, ensuring all sellers contribute fairly to the states where their customers live. For e-commerce sellers, understanding Michigan's rules is essential to avoid costly compliance mistakes.

Michigan's Nexus Thresholds (2026)

Michigan uses a straightforward "either/or" approach to economic nexus. You're required to register and collect sales tax once you meet either of these thresholds during the previous calendar year:

$100,000 in gross revenue from sales of taxable products and services, OR
200 transactions involving sales of taxable products and services

Understanding the "Either/Or" Trigger Logic

This is the critical distinction in Michigan's approach. You don't need to meet both thresholds—meeting just one automatically creates nexus. This means:

You could have only 150 transactions but still trigger nexus if your revenue exceeds $100,000
You might have 300 transactions but fall short on revenue and still be required to register if you hit 200+ transactions
There's no way around registration once you hit either threshold

Example 1 – Revenue Triggers Nexus: You sell handmade furniture through your website and Amazon. In 2025, you made $85,000 on your website and $20,000 on Amazon, totaling $105,000. Even though you only had 180 total transactions, you've exceeded the revenue threshold and must register by early 2026.

Example 2 – Transaction Count Triggers Nexus: You sell low-cost digital products. In 2025, you completed 225 transactions worth $85,000 total. Since you exceeded the transaction threshold, you must register—the revenue amount is irrelevant.

Example 3 – No Nexus Triggered: You sell specialty items and had only $75,000 in revenue with 120 transactions in 2025. Neither threshold was met, so you don't have nexus in Michigan for 2026.

The Calendar Year Lookback Period

Michigan measures nexus based on the previous calendar year only. This means:

Your 2025 sales activity (January 1 – December 31, 2025) determines your 2026 nexus obligation
You have a grace period between when you exceed a threshold in December and when obligations typically begin in January
Your nexus status resets every January 1st based on the prior year's performance

This lookback period gives you some planning advantage. If you're approaching either threshold near the end of a calendar year, you can prepare for likely registration in early January. Many sellers use the year-end rush to make strategic decisions about their 2026 tax compliance.

How Michigan Calculates Nexus

Understanding exactly what Michigan counts toward your thresholds is crucial for accurate compliance.

Gross Revenue Calculations

For the $100,000 threshold, Michigan counts gross revenue from all sales of taxable items delivered into Michigan. This specifically includes:

Direct sales from your e-commerce website
Sales through your own retail locations or channels
Sales made through marketplace platforms where you're listed as the merchant
Sales of digital products subject to Michigan sales tax
All taxable services you provide

However, gross revenue calculations exclude several categories:

Sales tax itself (you don't count the tax portion of transactions)
Sales to resellers who provide valid resale certificates
Exempt sales (items like groceries, clothing below certain thresholds, or other state-exempt products)
Shipping charges (if itemized separately from the product price)
Refunds and returns

Transaction Counting

For the 200-transaction threshold, Michigan counts the total number of individual transactions where taxable items are delivered into Michigan. Each distinct sale—whether it's $10 or $1,000—counts as one transaction.

Important details about transaction counting:

A single order containing multiple items typically counts as one transaction
Marketplace sales count as transactions toward your personal threshold
Returned or refunded transactions should not be counted
Transactions for exempt items are excluded

The Previous Calendar Year Measurement

Both thresholds are calculated using data from the previous calendar year only. This creates a clear reset point every January 1st:

January 1 – December 31, 2025 = The measurement period for your 2026 nexus determination
January 1 – December 31, 2026 = The measurement period for your 2027 nexus determination
If you exceed thresholds in December but fall below them by June, you still had nexus for the full calendar year

The calendar year approach differs from rolling 12-month calculations used in some states. Michigan's method is actually clearer for planning purposes because the reset happens on a fixed date.

Do Marketplace Sales Count in Michigan?

Yes—marketplace sales count fully toward your Michigan nexus thresholds, and this is a critical detail that many sellers overlook.

What This Means for Third-Party Sellers

If you sell through Amazon, eBay, Etsy, Walmart Marketplace, Shopify, or any other marketplace platform, those sales are counted toward your Michigan nexus determination. You cannot exclude them from your threshold calculations.

For example:

Direct website sales: $60,000
Amazon sales: $45,000
eBay sales: $20,000
Total: $125,000 (exceeds Michigan's threshold)

Even though you might think of these as separate business channels, Michigan aggregates all your sales activity for nexus purposes.

Marketplace Facilitator Responsibilities

Michigan distinguishes between two parties:

Merchants (you, if you sell through a marketplace platform)
Marketplace facilitators (the platform itself—Amazon, eBay, Etsy, Shopify, etc.)

Both have potential obligations:

Marketplace facilitators must register separately with Michigan and collect sales tax on transactions that occur through their platform
Merchants must monitor their own total sales (including marketplace sales) and register with Michigan if their personal activity exceeds the thresholds

This means you could have both Amazon collecting tax on your behalf (as a marketplace facilitator) and you collecting tax directly on your own website sales. Both registrations may be necessary depending on your sales volume.

The Aggregation Question

Some sellers ask: "If I sell through multiple marketplaces, do I count each one separately or together?" The answer: Together. Michigan aggregates all your sales activity regardless of which platform or channel generated them.

This is why many e-commerce sellers with significant marketplace presence hit the nexus threshold without realizing it. Your direct website sales might be modest, but when you add Amazon and Etsy sales together, the total often exceeds $100,000.

What Happens When You Exceed the Threshold

Once you've determined that you have economic nexus in Michigan based on your previous year's sales, specific legal obligations automatically activate.

Immediate Registration Requirements

You must register for a Michigan sales tax permit. This creates binding obligations to:

Collect sales tax from Michigan customers at the point of sale
Maintain detailed records of all sales, including date, customer location, and tax collected
File sales tax returns on a regular schedule with the Michigan Department of Treasury
Remit the sales tax you've collected to the state

Timeline for Registration

While Michigan provides a lookback period based on the previous calendar year, registration should happen promptly:

If you exceeded thresholds in 2025, you should register in early 2026 (ideally January or February)
Delaying registration beyond a reasonable timeframe can result in additional penalties
The longer you wait, the more back taxes and interest may accumulate

Many tax professionals recommend registering as soon as you confirm you've exceeded either threshold, rather than waiting until a specific deadline arrives.

Retroactive Tax Collection Obligations

An important reality: once nexus is triggered, you're typically responsible for sales tax going back to the first day of the calendar year in which you exceeded the threshold.

If you exceeded the threshold on November 1, 2025, you're generally responsible for collecting tax on sales made January 1, 2025 forward. This is why monitoring your thresholds throughout the year is critical—the sooner you know nexus has been triggered, the sooner you can begin collecting (or reconciling) back taxes.

Back Taxes and Interest

Failure to register and collect sales tax when required can result in:

Back taxes owed on all uncollected sales from the beginning of the measurement period
Interest charges on unpaid taxes
Penalties for late registration and non-compliance
Potential audit and additional assessment

These costs accumulate quickly. A seller with $150,000 in annual revenue might owe $9,000+ in back taxes alone, plus interest and penalties.

How to Register for Sales Tax in Michigan

The Michigan Department of Treasury handles sales tax registration through an online portal. The process is straightforward if you have the right information prepared.

Step-by-Step Registration Process

1. Gather Required Information Before Starting

Have the following details ready:

Federal Employer Identification Number (EIN) or Social Security Number (SSN)
Legal business name and business structure (sole proprietor, LLC, corporation, etc.)
Business mailing address
Expected monthly sales volume
Details about all sales channels (website, marketplace platforms, brick-and-mortar locations)

2. Visit the Michigan Business Registration Portal

Navigate to https://www.michigan.gov/taxes/business-taxes/new-biz

This is the official Michigan Department of Treasury website where all business registrations are handled.

3. Create Your Account

You'll need to establish a login with the Michigan Department of Treasury system. Save your login credentials securely, as you'll use this account to file returns and manage your permit going forward.

4. Select Sales Tax Permit Registration

Specify that you're registering for a sales tax permit. The system may ask about other permits or licenses you need—for sales tax purposes, make sure you clearly indicate this is your primary reason for registering.

5. Provide Detailed Business Information

Complete all required fields:

Legal business name (as it appears on your tax return)
Your business structure
Physical and mailing addresses
Phone number and email
Description of business activity (e-commerce, marketplace seller, etc.)
List of sales channels (your website, Amazon, eBay, Etsy, etc.)
Estimated monthly sales volume

6. Submit Your Application

Review all information for accuracy before submitting. Errors can delay permit issuance.

7. Receive Your Michigan Sales Tax Permit

You'll receive a Michigan Sales Tax Permit number via the online system (and typically by mail). This number is your registration with Michigan and must be used on all tax returns and correspondence.

The permit number looks like a standard state registration number and doesn't expire as long as you remain in compliance and continue to file returns.

Key Information to Have Ready

Before starting your registration, compile:

Your Federal EIN (IRS-issued)
Valid government-issued ID
Business ownership documentation
Bank account information (may be required)
Details about each sales channel where you operate
Any existing sales tax permits from other states (helpful for reference)

How Long Does Registration Take?

Once you submit your application, approval typically takes several business days to a few weeks. Some sellers receive their permit number immediately upon submission, while others wait for review. Check your account regularly for status updates.

How NexusMonitor Helps Track Your Michigan Nexus Status

Manually tracking sales by state across multiple platforms is error-prone and time-consuming. Automated nexus monitoring solutions are designed specifically to solve this problem.

Automated Threshold Monitoring

A comprehensive nexus monitoring tool continuously tracks your sales activity and alerts you when you're approaching Michigan's thresholds. These tools monitor:

Real-time sales by state
Both revenue and transaction metrics simultaneously
Progress toward the $100,000 revenue threshold
Progress toward the 200-transaction threshold
Upcoming calendar year resets

When you're at 80% of either threshold, automated alerts notify you to begin preparing for registration. This early warning system prevents the surprise of discovering you're out of compliance months after exceeding thresholds.

Integration with Your Sales Channels

Quality nexus monitoring integrates with your major sales platforms:

Your e-commerce website (Shopify, WooCommerce, custom platforms)
Marketplace platforms (Amazon Seller Central, eBay, Etsy, Walmart Marketplace)
Point-of-sale systems
Accounting software (QuickBooks, Xero, FreshBooks)

Data syncs automatically, so you don't manually input sales figures from multiple platforms. This eliminates entry errors and ensures all sales are captured consistently.

Michigan-Specific Compliance Support

The best nexus monitoring solutions include Michigan-specific features:

Understanding of Michigan's "either/or" threshold logic
Proper treatment of marketplace sales in threshold calculations
Tracking of the calendar year measurement period
Alerts when you're 30, 60, and 90 days away from exceeding thresholds
Historical reporting for audit purposes and tax professional consultation

Beyond tracking, these tools often provide documentation that helps when you need to prove your nexus status to tax professionals or during an audit.

Additional Compliance Features

Many platforms also offer:

Guidance on which states require registration based on your sales activity
Deadline reminders for registrations in multiple states
Tax rate information for different states and localities
Reporting templates for tax returns
Integration with tax compliance workflows

For multi-state sellers, these features save hundreds of hours annually compared to manual tracking.

Frequently Asked Questions

What is the sales tax rate in Michigan?

Michigan's statewide sales tax rate is 6%. However, some counties and municipalities impose additional local sales taxes. Once you register, check the Michigan Department of Treasury website for the complete tax rate applicable to each Michigan address where your customers are located.

Does Michigan use AND or OR logic for nexus thresholds?

Michigan uses OR logic, meaning you trigger nexus by exceeding either the $100,000 revenue threshold or the 200-transaction threshold. You don't need to hit both—hitting just one creates the obligation to register and collect sales tax.

When do I need to start collecting sales tax in Michigan?

Once you've exceeded either threshold during the previous calendar year, you should register immediately. Sales tax collection obligations typically begin at the start of the calendar year following the year you exceeded thresholds. However, you may be responsible for taxes dating back to January 1st of the year you exceeded the threshold, so register as soon as you confirm nexus status.

Do Amazon/marketplace sales count toward my Michigan nexus?

Yes, absolutely. Amazon sales, eBay sales, Etsy sales, and sales through any other marketplace platform count fully toward both your revenue and transaction thresholds. Michigan aggregates all your sales activity regardless of which channel generated them.

Can I deregister if my sales drop below the threshold?

Generally, you must maintain your Michigan sales tax permit as long as you're making any taxable sales in the state, even if you drop below the original thresholds that triggered registration. Some states allow voluntary deregistration if you stop selling into that state entirely, but this varies. Consult with a tax professional before attempting to deregister.

What counts as a "transaction" for Michigan nexus purposes?

A transaction is each separate sale of a taxable item delivered into Michigan. A single order with multiple items typically counts as one transaction. Returns and refunds shouldn't be counted, and transactions for exempt items are excluded.

How do I know if an item is "taxable" in Michigan?

Most tangible products are subject to Michigan sales tax. However, some items are exempt, including most groceries, clothing below certain price points, and certain services. The Michigan Department of Treasury website provides detailed guidance on which items are taxable. When in doubt, consult a tax professional.

What should I do if I realize I'm out of compliance?

If you discover you should have registered but didn't, contact the Michigan Department of Treasury immediately. File returns for all previous periods, remit unpaid taxes with interest, and work toward compliance going forward. Many states offer voluntary disclosure programs that reduce penalties for good-faith efforts to come into compliance.

Does Michigan allow marketplace facilitators to collect tax on my behalf?

Yes. Major marketplace platforms like Amazon, eBay, and Etsy are registered as marketplace facilitators in Michigan and collect and remit sales tax on your behalf. However, this doesn't eliminate your obligation to track your own nexus status and register directly with Michigan if you exceed the thresholds based on your personal sales activity.

Can I claim that marketplace sales don't count toward my nexus?

No. Michigan explicitly includes marketplace facilitator sales in nexus calculations. You cannot exclude Amazon, eBay, Etsy, or other marketplace sales from your threshold calculations.

Disclaimer: This article is for informational purposes only and does not constitute tax advice. Sales tax laws are complex and subject to change. Always consult with a qualified tax professional or attorney regarding your specific sales tax obligations and economic nexus status.