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Online Sales and Use Tax Return Filing and Payment, Sales and Use Tax, Finance

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.

* After submitting the online return form, the total due and payable must be paid using an e-check or credit card.

Please note:  The online payment service is provided by the Statewide Internet Portal Authority (SIPA).  The fees below are charged by SIPA and will be added to the transaction amount. 

* Only the sales and use tax payment amount will be forwarded to the City of Longmont.

Sales Tax Return Due Date

Who can use this service?

What do you need?

After you submit your online return form, you will be sent to a confirmation page that will thank you for submitting the form.

If there is revenue due, please click the link to proceed to the Statewide Internet Portal Authority (SIPA) website to remit the payment. Please ensure you have your account number, return period and amount handy when you begin the online payment process.

Click to access the Online Sales and Use Tax Return Form and Payment service