Online Sales and Use Tax Return Filing and Payment

City of Longmont Sales and Use Tax Online Filing and Payment Portal

NOTE: As of January 5, 2021, there is a new sales and use tax process.

The City has sent out registration letters for your business with information about logging in to the new sales and use tax system. This letter includes your activation code. After you’ve registered, you will see any open tasks due to the City in your Business Center, and you also will receive reminders by email. City will send out reminders via email.

What if I don’t receive a registration letter?

Please check your spam folder, and add the email address support@munirevs.com to your safe sender list. If you do not know your activation code, email support@munirevs.com for assistance. Or, you can contact the City at Sales.Tax@LongmontColorado.gov or 303-651- 8672.

NOTE: There is no change to the due date for filing sales and use tax returns. Returns and payment are due on the 20th of each month; please file your monthly sales and use tax return with the City as usual. If full payment is not included, the City will waive penalties and interest as long as you file the return by the due date and make contact with the City to make payment arrangements. If you do not file a return by the 20th of the month, late fees will be applied. (8/4/20)

Welcome to the City of Longmont Sales and Use Tax online filing and payment portal. Use this service to quickly and easily file and submit payment, if applicable, for a City of Longmont sales and use tax return.

What do you need for a City of Longmont sales and use tax return?

The City of Longmont account number on your sales tax license.
Gross sales and service amount (line 1 on sales/use tax return)
Total deductions (line 3-A through 3-L)
Amount subject to use tax
After you have submitted the online return, please follow up by remitting online payment at the same time.

sales tax license

IMPORTANT: Please do not use Google Chrome as your internet web browser to fill out the Sales and Use Tax Online Return Form. We have received reports of duplicate entries occurring while using this form with Chrome to submit your tax return.

FILE AND PAY SALES AND USE TAX ONLINE – 2018 and later

If you are filing online, the sales and use tax total due and payable must be paid online using an e-check or credit card.

Sales Tax Return Due Date

Sales and use tax returns are due on the 20th day of each month following the end of the filing period. If the 20th falls on a weekend or holiday, the return is due on the next business day. For example, the March 2014 return is due April 21, 2014, since April 20 falls on a weekend.

Who can use this service?

Any business with an active City of Longmont sales and use tax license that would like to file and pay online.