Maine Employer Tax Information

To sign up for Square’s online payroll services in Maine, you must be registered with Maine Revenue Services and the Maine Department of Labor so we can pay and file your state taxes.

Maine Tax Account Numbers

Maine Withholding Account Number

• If you are a new business, register online as a new business through Maine Revenue Services. Once you have registered, the state will provide you with an 8 digit withholding account number.

• If you already have a Maine Withholding Account Number, you can look this up online or on any previously filed Quarterly Withholding Tax Return (941ME). If you’re unsure, contact the agency at 207-626-8475 or withholding.tax@maine.gov.

Maine Unemployment Insurance Account Number

• If you are a new business, register online to retrieve your UI Account Number.

• If you already have a Maine UI Account Number, you can find this on the Notice of Contribution Rate mained by the Maine Department of Labor each year.

• If you’re unsure, contact the Maine Department of Labor at 207- 623-7900 or by visiting https://www.maine.gov/labor/.

Maine Unemployment Contribution Rate

• You can find your rate on the Notice of Contribution Rate mailed by the Maine Department of Labor each year.

• If you’re unsure, contact the Maine Department of Labor at 207- 623-7900 or by visiting https://www.maine.gov/labor/.

Maine Payroll Tax Details

Square Payroll processes the following per the frequency below to the listed state agencies: