If you plan to sell taxable goods or services in Maine, you’ll need to register for a Maine sales tax permit before collecting sales tax from customers. Whether you’re operating a local storefront, selling at events, or running an ecommerce business from another state, this guide will help you understand the Maine sales tax registration process in 2025.
Maine doesn’t make compliance overly complex, but like every state, there are specific requirements based on your business type, location, and sales volume. Let’s break it down step-by-step so you can get set up quickly and confidently.
What Is a Sales Tax Permit in Maine?
A sales tax permit in the state of Maine allows businesses to collect and remit sales tax to the state government. It is officially known as a Retailer’s Certificate and is issued by the Maine Revenue Services (MRS).
This permit is required for all businesses making retail sales of tangible personal property or taxable services to Maine customers. It doesn’t matter whether you’re physically located in the state or selling remotely, once you have nexus (physical or economic), registration becomes mandatory.
Do You Need to Register for a Sales Tax Permit in Maine?
You must register for a Maine sales tax permit if:
- You operate a retail store, warehouse, or office in Maine
- You make taxable sales to Maine customers
- You sell at trade shows, markets, or other temporary events in Maine
- You are a remote seller exceeding $100,000 in gross revenue from Maine sales in the current or prior calendar year
- You’re a marketplace facilitator collecting tax for third-party sellers
The remote seller sales tax registration in Maine is based on economic nexus. If your business crosses the threshold, you’re legally required to register and collect sales tax, even without a physical presence.
Step-by-Step: How to Get a Sales Tax Permit in Maine
Here’s how to apply for a Maine sales tax permit through the state’s official portal.
1. Gather Your Business Information
Before registering, prepare the following:
- Federal EIN or Social Security Number
- Legal business name and structure (e.g., LLC, Corporation, Sole Proprietor)
- Business address and contact info
- Responsible party information
- NAICS code to describe your business activity
- Estimated sales volume in Maine
2. Register Through the Maine Tax Portal
Visit the Maine Revenue Services website and access the Maine Tax Portal. You’ll need to create an account if you don’t already have one.
3. Complete the Application
Once logged in, choose “Sales and Use Tax” as the tax type and follow the prompts to submit your business details. Carefully check your information to avoid delays.
4. Submit Your Application
After reviewing and confirming your information, submit your application online. There is no fee for registering.
5. Receive Your Retailer Certificate
After approval, you’ll receive a Retailer Certificate, typically by email or mail within a few business days. You must display this certificate at your place of business or keep it on file if selling remotely.
What Information Do You Need to Register?
Here’s what Maine Revenue Services will request during your application:
Business Identification
- Employer Identification Number (EIN)
- Business legal name and DBA (if applicable)
- Type of legal entity (LLC, Corporation, Sole Proprietor, etc.)
Contact Information
- Physical and mailing addresses
- Business phone number and email
- Responsible party details (name, contact, SSN)
Tax Profile
- Estimated Maine sales
- NAICS code
- Start date for sales activity in Maine
How Much Does It Cost to Register for a Sales Tax Permit in Maine?
There is no cost to register for a sales tax permit in Maine. The application process is free, and there are no ongoing renewal fees for maintaining your sales tax certificate.
However, failing to register once you’re required can result in penalties, interest, or back tax liabilities, especially for remote sellers unfamiliar with local obligations.
How Long Does It Take to Get Approved?
Most applications submitted online are approved within 3 to 5 business days. You’ll receive your Retailer Certificate once processed. If the state needs more information, they’ll contact you directly.
Keep an eye on your email inbox (and spam folder) after applying.
What Happens After You Register?
After you receive your Maine sales tax permit:
- You’re legally required to collect state sales tax from Maine customers
- You must begin filing returns based on the schedule assigned to you (monthly, quarterly, or annually)
- You must file returns even if no sales were made, known as zero returns
- You’ll manage your account and file returns through the Maine Tax Portal
Related: Sales tax remittance explained
Common Mistakes to Avoid
Avoid these issues during registration and ongoing compliance:
- Registering with an incorrect EIN or legal name
- Choosing the wrong business activity or NAICS code
- Not registering as a remote seller when crossing economic thresholds
- Missing zero-return filings
- Assuming marketplace sales exempt you from registration (some businesses still need to register independently)
Special Considerations for Remote Sellers
Maine enforces economic nexus laws, meaning remote sellers without a physical presence still need to register once they meet the $100,000 annual gross revenue threshold. There is no transaction count rule, revenue is the only trigger.
Marketplace facilitators that meet this threshold are also required to collect and remit tax for their third-party sellers. However, individual sellers using multiple platforms may still need to register independently.
If you’re unsure whether you’ve crossed a threshold, Commenda can help you monitor your exposure across states.
Resources & Where to Register
- Register online: Maine Tax Portal
- Sales Tax Overview: Maine Revenue Services – Sales and Use Tax
- Customer Service: Call (207) 624-9693 or email taxpayerassist@maine.gov
Simplify Maine Sales Tax Compliance with Commenda
Managing state sales tax registrations and filings can become a full-time job, especially if you’re selling across multiple states or platforms. Commenda helps you:
- Automate your Maine sales tax registration
- Monitor economic nexus thresholds
- File monthly or quarterly returns
- Stay compliant across jurisdictions
Our platform is trusted by remote sellers, SaaS companies, and ecommerce businesses needing a reliable, hands-off way to handle tax compliance.
Frequently Asked Questions (FAQs)
Do I need a Maine sales tax permit if I only sell online?
Yes. If your business has more than $100,000 in annual revenue from Maine customers, you are required to register, collect, and remit sales tax, even if you have no physical location in the state.
How often do I need to file returns?
Maine assigns filing frequency based on sales volume. Most new registrants will file monthly or quarterly. Your filing schedule will be provided upon approval.
Can I charge sales tax before getting my permit?
No. You must wait until you’ve received your Retailer Certificate before collecting tax from customers.
What if I miss a filing deadline?
Maine may impose penalties, interest, and possible suspension of your account for missed or late filings. Always file on time, even if you had no sales.
Does Commenda help with Maine tax filings?
Yes. Commenda offers multi-state registration and filing support, including for businesses needing to register or file in Maine. We simplify your tax operations and keep your business audit-ready.
