Spotlight On: Filing Frequencies & Due Dates!
Your sales tax filing frequency is determined by the amount of sales tax collected monthly:
- $15 or less per month: Annually. Annual returns are due January 20
- Under $600 per month: Quarterly. Due dates:
- January - March: April 20
- April - June: July 20
- July - September: October 20
- October - December: January 20
- $600 or more per month: Monthly. Monthly returns are due on the 20th day of the month following the reporting period
- If the 20th falls on the weekend or a legal holiday, the return will be due the next business day
- To help ensure you always pay on time, you can sign up to receive filing reminders via email
HELPFUL HINT: While sales tax returns are due on or by the 20th, you can file anytime between the 1st and 20th day of the month
Learn more about sales tax filing requirements, frequencies, and due dates

Previous Tax Tips
Coming to Terms with Marketplace Terminology!
Here are some common terms to help you if you’re an online seller:
Marketplace: a physical or electronic forum, including, but not limited to, a store, booth, internet website, catalog, or dedicated sales software application, where tangible personal property, commodities or services are offered for sale, lease, or rental.
Marketplace facilitator: an individual or legal entity that operates a marketplace and contracts with marketplace sellers to facilitate sales and accept payment on the sellers’ behalf.
Marketplace seller: anyone who contracts with a marketplace facilitator to make sales through a marketplace.
Multichannel seller: someone who sells through a marketplace facilitator, but also sells products directly to customers online or in a physical store.
Learn more about Marketplaces here
Updated Colorado Sales/Use Tax Rates effective 1/1/25!
The DR 1002, Colorado Sales/Use Tax Rates, is updated on January 1st and July 1st of each year and provides:
- Current Colorado sales and use tax rates throughout the state
- Service/Vendor fee information
- Exemption information
- RTD/CD & Special District tax rates
- City and county tax rates, which are state-collected
- Contact information for home rule self-collecting cities/jurisdictions
NOTE: The total tax rate for any jurisdiction must be computed by adding all taxes applicable to that jurisdiction.
View the DR 1002 here
Getting to Know…Letter Rulings!
Taxpayers may request a general information letter or private letter ruling for any tax administered by the Taxation Division.
General Information Letters:
- Cover tax issues not explicitly addressed in other Department publications
Private Letter Rulings:
- Are specific determinations of tax consequences of a proposed or completed transaction
- Are generally binding upon the Department
- May only be relied upon by the taxpayer to whom they are issued
View Letter Rulings here
View this week's tax tip here
Notice that employers MUST provide to employees who receive a W-2!
- Employers MUST provide employees who receive a W-2 with the language in the form DR 0995, Notice of Federal and State Refundable Tax Credits annually, either electronically or by print.
- The DR 0995 provides the language employers must provide to employees who receive a Colorado wage and tax statement (form W-2).
- Employers MUST provide ALL the language in the notice to the employee and NOT just the URL for the Department's information on Child Tax Credits and Earned Income Tax credits.
Learn more about the Child Tax Credit (CTC) & Earned Income Tax Credit(EITC) here
View the DR 0995 here
SUTS is an online portal that allows you to:
- File all state-collected and participating home rule cities on a SINGLE return spreadsheet with a SINGLE payment
- Calculate tax rates for items with differing tax rates
- Keep a record and history of your changes
IMPORTANT: If you file using SUTS, you must also pay through SUTS.
A common question is, what is the difference between Revenue Online and SUTS?
- The main difference between the two is:
Revenue Online allows you to file sales tax returns for state-collected jurisdictions - SUTS allows you to file returns for BOTH state-collected and home-rule cities on ONE return
Access SUTS
View this week's tax tip here
Sales Tax Filing Frequency Changes Effective January 1, 2025!
Sales tax filing frequencies are determined by the amount of sales tax collected monthly and are currently as follows:
- $15 or less per month - Annually
- Under $300 per month - Quarterly
- $300 or more per month - Monthly
Effective January 1, 2025, sales tax filing frequencies will be:
- $15 or less per month - Annually
- Under $600 per month - Quarterly
- $600 or more per month - Monthly
Learn more about sales tax filing frequencies here
View this week's tax tip here