This form is for periods starting on or after January 2018. If you need to file or amend a
return for a period ending on or before December 2017, please visit the Sales Tax
Instructions and Forms webpage and download the applicable DR 0100.
Sales Tax Filing Change
Beginning with sales on January 1, 2018, the Colorado Department of Revenue (CDOR) will be
requiring ALL Colorado sales tax licensees to report and pay sales tax to the penny, regardless of
filing format. Matching nationwide standards, the included copies of blank sales tax returns no
longer have “00” entered in the cents column. Instead, there is space for you to enter this
Electronic Filing
Did you know 82% of Colorado sales tax returns are filed electronically? Please note the Colorado
Department of Revenue will eventually discontinue mailing sales tax forms. Make the switch now to
file your return electronically. Watch our YouTube video How to File the Colorado Sales Tax
Return in Revenue Online to see how easy e-filing can be.
What are the benefits of filing online?
Free, Safe and Secure: CDOR’s Revenue Online service has not been compromised by data
security breaches.
Save money: Avoid late filing penalty fee and loss of the vendor service fee from using old
or photocopied paper forms to file.
Save time: No need to mail the tax return or visit us in person.
Quicker return processing: Returns are more efficient when e-filed.
Easy Math: Software will calculate how much tax is due for your site(s).
Convenient: Use a computer or laptop to e-file.
How do I sign up for Revenue Online?
Watch our YouTube video Tips on Setting Up a New Sales Tax Account in Revenue Online for
helpful information.
Please scroll down to continue to the DR 0100 form.
1. Go to Colorado.gov/RevenueOnline and click “Create a Login ID” to start.
2. Select an entity type, read the instructions and then click “Next” to continue.
3. Follow the on-screen prompts to fill in the requested fields.
4. Enter Login/Password information for your account.
5. Enter Account Information.
6. After entering the required information you will see a confirmation page on your screen.
7. Retrieve the Authorization Code we sent to your email account. Then, return to Revenue Online
and enter the Login ID and Password you created.
*If you cannot file your sales tax return electronically, watch our YouTube video
How to File the Colorado Sales Tax Return Using the Paper Form and read our
Common Filing Errors before you continue, to ensure you file correctly.*
Colorado Retail
Sales Tax Return
with Deductions & Exemptions Schedules
DR 0100 (07/31/17)
Denver, CO 80261-0013
General Information
You must le a sales tax return every ling period, even if no tax has
been collected or no tax is due. Failure to le will result in estimated
billings. If you do not le the required returns, the department will
close your account and your sales tax license will no longer be valid.
Zero tax returns can be led in Revenue Online.
Verify you are using a correct Federal Employer Identication
Number (FEIN) or Social Security number (SSN). If your account
does not have a valid FEIN or SSN, your return could be delayed
and you will receive a notice to provide valid proof of the FEIN or
SSN. Note: This will also prevent you from obtaining an EFT number
for payments and prevent you from ling by spreadsheet or XML.
Colorado Account Number
Enter your eight-digit account number and four-digit site/location
number. For example: 00000000-0010. Each sales tax return must
have a site/location number entered on the return in order to be
processed. This helps the department identify and properly allocate
local jurisdiction taxes that are paid with the return.
If you have applied for your license, but do not have your account number,
contact the Customer Contact Center at 303-238-7378 for assistance.
Enter the ling period as MM/YY-MM/YY.
If ling for the rst quarter (Jan. through March) of 2017, the dates
for this period on a paper form should be 01/17-03/17. When ling
in Revenue Online, the system will only require the end date of each
period. (e.g., rst quarter: 03312017)
Location Jurisdiction Code
Enter the six-digit location jurisdiction code for your site/location.
The code can be found on your Sales Tax License under 'Liability
Information' or in the Location/Jurisdiction Codes for Sales Tax
Filing, DR 0800.
Due Date
Returns must be led online or postmarked on or before the 20th
day of the month following the reporting period.
Monthly Returns: due the 20th day of the month following the
reporting month.
Quarterly Returns:
January – March due April 20
April – June due July 20
July – September due October 20
October – December due January 20
Annual Returns: due January 20
Note: If the 20th is a weekend or holiday, the return is due the next
business day.
For more information, see FYI General 15: Colorado Department of
Revenue Tax Due Dates.
Filing an Amended Return?
If you are ling an amended return, mark the amended return box. A
separate amended return must be led for each period and/or each site.
The amended return must show all lines as corrected, not merely the
difference(s). The amended return replaces the original in its entirety.
Recommended Forms, Publications and Resources
Resources available on the Colorado Taxation website
Sales and Use Tax General Information and Reference
Guide, DR 0099
FYI Sales 1: How to Document Sales to Retailers, Tax-
Exempt Organizations and Direct Pay Permit Holders
FYI Sales 4: Taxable and Tax Exempt Sales of Food
and Related Items
Colorado Department of Revenue Electronic Funds
Transferred (EFT) Program For Tax Payments, DR 5782
Authorization for Electronic Funds Transfer (EFT) For
Tax Payments, DR 5785
Sales Tax web pages
Colorado Business Resource Book, ColoradoSBDC.org
Learn more about Sales Tax
FREE public tax classes are offered live and online. Please visit the
Education page of the Taxation website Colorado.gov/Tax/Education
to view current schedules and to register for a class near you.
Colorado Sales Taxes
State Sales Tax
The state sales tax rate is 2.9% and is reported in the state column
of this return.
RTD and CD Taxes
Regional Transportation District (RTD) and the Scientic and Cultural
Facilities District (CD) taxes are administered in the same manner
as state sales tax. The RTD sales tax rate is 1% and the CD sales
tax rate is .1%. These taxes are reported in the RTD/CD column.
Special District Taxes
Special district taxes which are reported in the Special District
column include the Regional Transportation Authority (RTA), Multi-
Jurisdictional Housing Authority (MHA), Public Safety Improvements
(PSI), Health Services District (HSD) and the Metropolitan District
Tax (MDT).
Special district taxes which are not reported in the special district
column include the Mass Transportation System Tax (MTS) and the
Local Improvement District Tax (LID). MTS is reported in the County/
MTS column and LID taxes are reported in the City/LID column.
The Baptist Road RTA (BRRTA) and the Football District Tax (FD)
have both expired and any tax collected on periodic lease or credit
payments must be remitted on the Colorado Special District Sales
Tax Return Supplement, DR 0200.
County and City Taxes
County and city sales taxes collected by the state are administered
in the same manner as state sales tax. If the sale is subject to
state sales tax, it is also subject to state-collected local sales tax.
Exceptions to this guideline as well as local sales tax rates are listed
in the Colorado Sales/Use Tax Rates, DR 1002. Local sales taxes
are reported in the County/MTS and City/LID columns.
For more information on guidelines for local sales tax, refer to
FYI Sales 62: Guidelines for Determining When to Collect State-
Collected Local Sales Tax.
Self-Collected Home-Rule Cities
Home-rule cities that collect their own local sales tax may have
different guidelines and must be contacted directly. These cities are
listed in the DR 1002 along with their contact information.
You Can File Your Return Online!
To save time and reduce ling errors, le this return through Revenue
Online. Use Colorado.gov/Re venueOnline to register, le, pay and
manage your sales tax account.
If you cannot le through Revenue Online, refer to the Paper Filing
Instructions below and complete this return in its entirety.
Sales tax lers with two or more sites (locations) may le
by XML (Extensible Markup Language) or Excel spreadsheet
through Revenue Online. A list of XML approved software vendors
is available on the website Colorado.gov/Tax under Software
Developers-Sales Tax XML. Use of the department's pre-approved
XML software does not require individual approval. For the Excel
spreadsheet, there is a template and handbook on the website.
Use of the Excel spreadsheet requires individual approval by
the department before it can be used. For more information on
spreadsheet ling, refer to the Spreadsheet Upload Handbook
available at the Taxation website under the Alpha Index letter "S"
for spreadsheet ling.
Line 1. Gross Sales and Services
Enter total gross sales and services for this site/location only.
Include all taxable and nontaxable sales and collection of bad debts
previously deducted. You will enter non-taxable deductions and
exemptions on the Deductions and Exemptions Schedules.
Line 2a. Sales to licensed dealers
Enter sales made to other licensed dealers (retailers) for resale.
Line 2b. Deductions
Enter allowed deductions listed on the deductions schedule from
Page 2; Part A. Deductions taken on the "Other" line must include
an explanation. If you are claiming deductions on this line, the
deductions schedule must be completed.
Line 3. Net Sales
Subtract total deductions (line 2c) from gross sales and services
(line 1) $______________ this is your net sales. Enter this amount
in each applicable column. The net sales must be the same across
all applicable columns. Do not enter different amounts in the State,
RTD/CD, Special District, County/MTS and the City/LID columns.
Line 3a. Sales out of taxing area
Enter the amount of sales delivered out of your taxing area for this
site/location only. Note: This is applicable to physical site/locations
Line 3b. Exemptions
Enter the amount of state and applicable local exemptions listed
on the exemptions schedule from Page 3; Part B. Exemptions
taken on the "Other" line must include an explanation. Exemptions
may be specic to state, county, city and special districts. Refer to
DR 1002. If you are claiming exemptions on this line, the exemptions
schedule must be completed.
Line 3c. Overpayment from previous return
If you overpaid sales tax on a previous return, you may deduct
the overpayment amount on line 3c only if there is not an existing
credit on the account due to the overpayment. To calculate the dollar
amount on line 3c, you will divide the tax overpayment by the same
tax rate you used to calculate the tax due on the original return.
The calculation must be done for each applicable tax for each site.
Do not reduce the tax liability below zero. Note: If a credit is carried
forward for city taxes, the credit can only be deducted in the city
Tax Rate: Tax rates are listed in the Colorado Sales/Use Tax Rates,
DR 1002 and in Revenue Online under "Additional Services" then
"View Sales Rates and Taxes".
Line 6. Excess tax collected
Enter the amount of excess tax collected. For example: The tax
rate decreased but tax was collected at the old rate on payments
made after the effective date of the new tax rate. Excess tax has
been collected and should be reported on this line.
Line 8a. Service Fee Rate
Service fee rates are published in the Colorado Sales/Use Tax
Rates, DR 1002.
DR 0100 (07/31/17)
Denver, CO 80261-0013
Line 8b. Service Fee (Discount)
A "discount" is given to vendors who timely le and pay their sales
taxes. If your return and payment are postmarked and received
timely, you can subtract the applicable service fee from your sales
tax due. Note: not all jurisdictions allow a service fee. Refer to the
DR 1002 for more information.
Line 10: Tax on inventory usage
If your business takes out of its inventory goods that were purchased
tax-free for resale and uses the goods for personal or business
purposes, you must pay sales tax on those items when they are
taken out of inventory and used. The cost of the items must be
entered on line 10 of this form. Tax is due for state, RTD, CD, special
districts, county or state-collected city tax. Do not use this line to
le/pay consumer use. Consumer Use Tax is reported on the DR
0252 and DR 0251.
Lines 12 and 13. Penalty and Interest
If this return and remittance is postmarked or electronically made
after the due date, a penalty of 10% plus .5% per month (not to
exceed 18%) is due.
Line 15. Total Amount Owed
Enter the total from all columns. Check for mathematical and
transposition errors. Both the amount on the return and the amount
of the payment must match.
To avoid processing delays, complete all applicable and
required lines. Lines on the return can be left blank if the value is
zero, except for lines 1, 3, 4, 5, 9, 10, and 11.
Multi-Location Filers: A separate DR 0100 must be led for each
physical site or for each non-physical site that is collecting sales tax.
All physical sites must le a return even if there were no sales. Verify
your sites/locations in Revenue Online under "Additional Services".
For additional information, refer to FYI Sales 58: Requirements for
Sales Tax Remittance for Multiple Location Companies.
Deductions and Exemptions Schedules (Page 2, Part A and
Page 3, Part B)
If deductions and exemptions are being claimed on lines 2b and
3b, the Deductions and Exemptions Schedules are required to
be completed. If these schedules are missing, incomplete or
incorrect, all deductions and exemptions will be disallowed.
A separate schedule must be completed and submitted for each
site/location. For more information on allowed deductions and
exemptions, refer to DR 1002. Additional information is available at
the Taxation website under the Alpha Index letter "S" for Sales Tax.
Before mailing your return verify that:
All applicable lines are complete.
All three pages of the return are complete. Even if you
have no deductions (page 2) or exemptions (page 3),
these pages must accompany page 1 when you mail in
your return. Page 1 of the return continues onto page 2.
The correct version of the sales tax form is used.
The account number and site number are entered
correctly on the return.
The correct tax rates are used. See the DR 1002.
For a list of common ling errors you can avoid when ling your return,
see the Common Filing Errors document on the Taxation website.
Online Payments
EFT Payment (No Fee)
Pay by electronic fund transfer (EFT) via ACH Debit or
Credit. EFT registration is required prior to making your
payment. Payments cannot be made until 24-48 hours
after you register.
Credit Card/E-Check
Pay by using a credit card or electronic check. There is
an additional service fee for making a payment using
these methods.
Paper Check
Online Filing with Payment Coupon
You can print a payment coupon from Revenue Online after
you have led your return electronically. Select ‚"Payment
Coupon"‚ in the Payment Option. You can print a coupon for
each period.
Paper Filing with Payment
If you are ling and paying by mail, include the account
number, ling period and write‚ "sales tax", on your check
to ensure proper credit is applied to your account. One check
can be remitted for the total for all returns.
Sign and date the return and mail with your payment to:
Colorado Department of Revenue
Denver, CO 80261-0013
Retain copies of all returns for your records.
If you need further assistance, please call our Customer Contact
Center at 303-238-7378.
DR 0100 (07/31/17)
Denver, CO 80261-0013
Colorado Retail
Sales Tax Return
with Deductions & Exemptions Schedules
Signature (Signed under penalty of perjury in the second degree).
Last Name or Business Name First Name
Address City State Zip Phone
Colorado Account Number (XXXXXXXX-XXXX) Period
Location Juris Code (Refer to form DR 0800) Due Date (MM/DD/YY)
1. Gross Sales and Services for
this site/location only.
Mark here if this is an Amended Return
2a. Sales to licensed
2b. Deductions-
Page 2, Part A.
2c. Total Deductions (add
lines 2a & 2b.)
3. Net sales: Subtract line 2c
from line 1:
$ _____________________
Enter amount from above in
each applicable column
Special District County/MTS City/LID
(3-1) (3-2) (3-3) (3-4) (3-5)
3a. Sales out of taxing area
(3a-1) (3a-2) (3a-3) (3a-4) (3a-5)
3b. Exemptions-
Page 3, Part B.
(3b-1) (3b-2) (3b-3) (3b-4) (3b-5)
3c. Overpayment from
previous return
(3c-1) (3c-2) (3c-3) (3c-4) (3c-5)
4. Net taxable sales (line 3
minus lines 3a, 3b and 3c)
Tax Rate
5. Amount of sales tax
(multiply tax rate by line 4)
6. Add: Excess tax
(6-1) (6-2) (6-3) (6-4) (6-5)
7. Total (add lines 5 & 6)
8. a. Service fee rate
b. Service fee (discount)
(multiply line 7 by line 8a).
(8-1) (8-2) (8-3) (8-4) (8-5)
9. Sales tax due
(line 7 minus line 8b)
DR 0100 (07/31/17)
Denver, CO 80261-0013
Attention: Continue to pages 2 and 3 to complete your return.
Page 1
DR 0100 (07/31/17)
Denver, CO 80261-0013
Tax on
Special District County/MTS City/LID
(10-1) (10-2) (10-3) (10-4) (10-5)
11. Total tax due
(add lines 9 & 10)
(11-1) (11-2) (11-3) (11-4) (11-5)
12. Penalty
(12-1) (12-2) (12-3) (12-4) (12-5)
13. Interest
(13-1) (13-2) (13-3) (13-4) (13-5)
14. Total each tax
(add lines 11, 12, & 13)
The State may convert your check to a one-time electronic banking transaction.
Your bank account may be debited as early as the same day received by the
State. If converted, your check will not be returned. If your check is rejected due
to insufcient or uncollected funds, the Department of Revenue may collect the
payment amount directly from your bank account electronically.
15. Total Amount Owed
(add all columns
on line 14)
Paid by EFT
Deductions Schedule- Part A
This schedule is required for deductions claimed on line 2b, page 1.
1. Service sales
2. Sales to governmental agencies, religious or charitable organizations
3. Sales of gasoline
4. Sales of drugs by prescription and prosthetic devices
5. Trade-ins for taxable resale
6. Bad debts charged-off, returned goods, trade discounts and allowances where tax was paid
(cash discounts are not allowed)
7. Cost of utilities, excluding tax. Restaurants must complete and attach form, DR 1465.
8. Sales of agricultural compounds and pesticides
9. Other Deductions, explanation required
Total add lines 1 through 9. Enter total deductions on line 2b, page 1. Total
Colorado Account Number (XXXXXXXX-XXXX) Period
Page 2
DR 0100 (07/31/17)
Denver, CO 80261-0013
Colorado Account Number (XXXXXXXX-XXXX) Period
Exemptions Schedule- Part B (Exemptions vary, refer to Colorado Sales/Use Tax Rates, DR 1002).
This schedule is required for exemptions claimed on line 3b, page 1.
1. Food, including food sold
through vending machines
State RTD/CD Special District County/MTS City/LID
(B1-1) (B1-2) (B1-3) (B1-4) (B1-5)
2. Machinery
(B2-1) (B2-2) (B2-3) (B2-4) (B2-5)
3. Electricity
(B3-1) (B3-2) (B3-3) (B3-4) (B3-5)
4. Farm Equipment
(B4-1) (B4-2) (B4-3) (B4-4) (B4-5)
5. Sales of low-emitting
vehicles, etc.
(B5-1) (B5-2) (B5-3) (B5-4) (B5-5)
6. School related sales
(B6-1) (B6-2) (B6-3) (B6-4) (B6-5)
7. Cigarettes
(B7-1) (B7-2) (B7-3) (B7-4) (B7-5)
8. Renewable energy
(B8-1) (B8-2) (B8-3) (B8-4) (B8-5)
9. Space Flight Exemption
(B9-1) (B9-2) (B9-3) (B9-4) (B9-5)
10. Other Exemptions,
explanation required
(B0-1) (B0-2) (B0-3) (B0-4) (B0-5)
11. Total: add lines 1 through
10 of each column, enter total
exemptions on line 3b, page 1.
Page 3