Maine Sales Tax Guide for E-commerce Sellers

Rate structure

Maine's state rate is 5.5%; the combined state + local rate ranges from 5.5% (flat). Sourcing: Destination.

COMPONENTRATENOTES

State rate5.5%Maine Tax Portal general statewide rate

Local taxes5.5% (flat)No local sales tax — one flat 5.5% statewide (8% prepared food, 9% lodging).

ReturnSales and Use Tax ReturnSales and Use Tax Return (ST-7, flat 5.5%)

Economic nexus threshold

You must register and collect once your Maine sales reach $100,000, measured over the previous or current calendar year. There is no transaction-count threshold. 200-transaction test removed 2022-01-01. Sales made through a marketplace facilitator do not count toward the remote seller's threshold — only your direct sales do.

Where you stand: SalesTax50 tests your imported sales against this exact rule and flags Maine as Approaching or Exceeded on your Nexus page — check my nexus free →

Filing frequency

Maine Tax Portal assigns a filing frequency at registration based on expected tax liability and adjusts it over time. Frequencies used in Maine: Monthly · Quarterly · Semi-annual · Annual.

Due dates

Returns are due on the 15th of the month following the period. When the due date falls on a weekend or holiday it moves to the next business day.

Late filing: $25 or 10% of tax due, plus interest.

Marketplace facilitator rules

Since October 2019, marketplace facilitators (Amazon, eBay, Walmart, TikTok Shop) collect and remit Maine tax on your marketplace sales. How Maine treats them:

Who collects?Facilitatoron marketplace orders; you collect on Shopify / your own site.

Count toward nexus?Noonly your direct sales are tested against the remote-seller threshold.

Do you still file?YesYes — a registered seller still files, even for periods where all sales were through marketplaces (a zero or marketplace-only return).

How reported?DeductionIncluded in gross then deducted as exempt (Maine FAQ dialect).

Direct salesYou collectShopify, your own site, invoices — you collect and remit on your return.

Marketplace treatment changes state by state and year by year — SalesTax50 separates marketplace and direct sales automatically, but confirm with Maine Revenue Services when in doubt.

Filing portal & AutoFile

Maine returns are filed through revenue.maine.gov/_. Login verification: Emails a one-time code. SalesTax50 AutoFile prepares the Sales and Use Tax Return from your imported sales — you review and approve every return before it is submitted.

FAQ

Do I need a Maine permit if I only sell on Amazon?

If you exceed the $100,000 threshold with your direct (non-marketplace) sales or have physical presence (including inventory in Maine warehouses), yes — you must register even though Amazon collects for you.

What if I sell on Shopify and TikTok Shop?

TikTok Shop collects as a marketplace facilitator; Shopify does not. You collect on Shopify orders and report both streams on your Maine Tax Portal return — SalesTax50 separates them automatically.

Does SalesTax50 file Maine returns automatically?

Yes — AutoFile prepares your Sales and Use Tax Return from imported sales; you approve every return before it is submitted, and a $99 one-time state setup configures your existing Maine permit.

This guide is general information for e-commerce sellers, not tax advice. Rates, thresholds and due dates change — confirm with Maine Revenue Services before relying on them.

Let AutoFile handle your Maine returns

Prepared and checked for you — you approve before anything is filed.

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