A Maine use tax certificate is the registration Maine Revenue Services issues to a business that buys taxable goods or services from out-of-state sellers and needs to pay use tax directly to the state rather than through a regular sales tax account. Maine’s use tax rate is 5.5%, the same as its sales tax rate, and the obligation falls on anyone who uses or consumes taxable property in Maine without having paid sales tax at the point of sale.1Maine State Legislature. Maine Code Title 36 Section 1861 – Imposition The certificate formalizes the direct-payment arrangement so vendors know not to collect sales tax from you.
Who Needs One
If your business regularly buys taxable items from out-of-state vendors that don’t charge Maine sales tax, and you don’t make retail sales yourself, you probably need a use tax account. Typical candidates are consulting firms buying office equipment online, nonprofits ordering supplies from out-of-state catalogs, and service companies purchasing tools and materials. Because these businesses have no reason to hold a sales tax registration, they need a separate use tax account to stay compliant.
The legal trigger is simple. Maine imposes a tax equal to the sales tax rate on any tangible personal property or taxable service used or consumed in Maine when sales tax wasn’t collected at the point of sale.1Maine State Legislature. Maine Code Title 36 Section 1861 – Imposition You remain personally liable for that tax until you either pay it directly or can show the seller collected it for you.
A use tax certificate is not a resale certificate. A resale certificate is issued only to active retailers reporting at least $3,000 in annual gross sales, and it lets them buy inventory tax-free because they’ll collect sales tax when they resell.2Maine Revenue Services. Instructional Bulletin No. 54 – Resale Certificates If you’re not reselling what you buy, a resale certificate doesn’t apply.
Audit your purchases before you register. Since October 2019, marketplace facilitators like Amazon and eBay are required to collect and remit Maine sales and use tax on sales they facilitate for delivery into Maine.3Maine Revenue Services. Marketplace FAQ If most of your out-of-state buying happens through those platforms, tax is probably already being collected at checkout, and the certificate only matters for the smaller vendors or direct suppliers that don’t collect Maine tax.
One more boundary: individuals don’t register for a use tax certificate at all. Maine residents who owe use tax on personal purchases report it on their Maine individual income tax return (Form 1040ME) rather than through a business account.
How to Register
Register through the Maine Tax Portal at revenue.maine.gov. From the homepage, click “Register a New Business” in the business panel and follow the prompts.4Maine Revenue Services. Sales, Use, and Service Provider Tax FAQ You can select a use-tax-only account if your business doesn’t need to collect sales tax, and you’ll create login credentials for future access.
Have the following ready:
- Your Federal Employer Identification Number, or Social Security Number if you’re a sole proprietor.5Maine Revenue Services. Registration Application for Business Taxes
- The legal business name as it appears on your federal or state filings.
- A physical business address and a mailing address.
- Phone number and email address.
- Business start date and estimated monthly tax liability. Maine Revenue Services uses the estimate to assign your filing frequency.
If you operate from multiple locations, each site needs to be accounted for during registration. Review the summary page carefully before submitting, and save the confirmation number the portal generates.
Paper applications are also accepted. The registration booklet is on the MRS website and includes the mailing address.5Maine Revenue Services. Registration Application for Business Taxes Online registrations process in a few business days; paper applications can take several weeks.
Using the Certificate With Vendors
Once Maine Revenue Services issues the certificate, send a signed copy to each out-of-state vendor you buy from regularly. It tells the seller you’ll handle use tax directly, so they shouldn’t collect Maine sales tax on your orders.
Keep a list of which vendors have your certificate on file, and confirm new orders are being processed with the exemption applied. If a vendor charges Maine sales tax anyway, you can claim a credit on your use tax return for the amount already paid, but sorting it out before the transaction closes is easier.
Filing Returns
Registering commits you to filing periodic returns. Filing frequency, monthly, quarterly, or annually, is set from the estimated liability you give at registration. Businesses with higher purchase volumes file more often.
On each return, report the total purchase price of taxable goods and services you bought without paying sales tax during the period, and apply the 5.5% rate.6Maine Revenue Services. Sales and Use Tax Rates and Due Dates If you paid sales tax to another state on any of those purchases, you can generally claim a credit for that amount so the same item isn’t taxed twice. Returns go through the Maine Tax Portal.
File even in periods when you made no untaxed purchases. A zero-liability return is still required, and skipping a filing can trigger penalties when no tax is owed.
Records to Keep
Maine requires taxpayers to keep records supporting their filings for at least six years. For use tax, that means purchase invoices, receipts, and documentation showing what you bought, what you paid, and whether sales tax was collected.7Maine Revenue Services. Chapter 103 – Recordkeeping and Retention Keep copies of certificates you’ve issued to vendors and records of any sales tax paid to other states that you claimed as a credit. Electronic records must stay accessible for the same six years. Losing documentation doesn’t eliminate liability; it just makes it harder to show you paid the right amount.
Penalties for Late or Missed Filings
Late payment carries a penalty of 1% of the unpaid tax per month, capped at 25% of the balance owed.8Maine State Legislature. Maine Code Title 36 Section 187-B – Penalties Hitting that cap means you’ve gone more than two years without paying, and interest has been running the whole time.
Interest accrues separately. For 2026, Maine charges 9% annually on overdue tax, compounded monthly.9Maine Revenue Services. Interest Rates, 1992 to Present
Failing to file a return at all is worse. If you file within 30 days of a formal demand from Maine Revenue Services, the penalty is $25 or 10% of the tax due, whichever is greater. If you still don’t file after that window closes, the penalty jumps to 100% of the tax owed, meaning the full tax liability is added on top of itself as a penalty.8Maine State Legislature. Maine Code Title 36 Section 187-B – Penalties Staying current with your filings avoids all of it.