CDTFA-501-DG Government Entity Diesel Fuel Tax Return Preview on Page 1

CDTFA-501-DG Government Entity Diesel Fuel Tax Return 2026

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  1. Click ‘Get Form’ to open the CDTFA-501-DG in our editor.
  2. Begin by entering your account number and the period start and end dates at the top of the form.
  3. In the 'Report of Diesel Fuel Transactions' section, fill in lines 1 through 6 with the total gallons of undyed and dyed diesel fuel in tanks, purchased, and sold.
  4. Proceed to the 'Government Entity Tax Return or Claim for Refund' section. Enter the total gallons used on lines 7 and 8, then calculate line 9 by adding these two amounts.
  5. Complete lines 10 through 18 by following the instructions provided for each line, ensuring you accurately calculate tax due or refund claimed.
  6. Finally, sign and date your return before submitting it. Make sure to keep a copy for your records.

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Got questions?

We have answers to the most popular questions from our customers. If you can't find an answer to your question, please contact us.

Log in with your username and password on our website at onlineservices.cdtfa.ca.gov. Click on the account for which you want to request a refund, and select the More link under the I Want To section. Then select the Submit a Claim for Refund link, and follow the prompts.
All retailers must report sales tax liability on an accrual basis. Bad debt deductions will not be disallowed solely for the reason that a retailer is on a cash reporting basis for income tax purposes.
The CDTFA assigns a filing frequency (quarterly prepay, quarterly, monthly, fiscal yearly, yearly) based on reported sales tax or anticipated taxable sales at the time of registration. Please see our Filing Dates for Sales Use Tax Returns page for more details.
The statewide tax rate is 7.25%. In most areas of California, local jurisdictions have added district taxes that increase the tax owed by a seller. Those district tax rates range from 0.10% to 2.00%. Some areas may have more than one district tax in effect.
Use Form 4136 to claim: A credit for certain nontaxable uses (or sales) of fuel during your income tax year. The alternative fuel credit. Aa credit for blending a diesel-water fuel emulsion.

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We assign a filing frequency (quarterly prepay, quarterly, monthly, fiscal yearly, yearly) based on your reported sales tax or your anticipated taxable sales at the time of registration. If the due date falls on a weekend or state holiday, the due date is extended to the next business day.
Retailers engaged in business in California must register with the California Department of Tax and Fee Administration (CDTFA) and pay the states sales tax, which applies to all retail sales of goods and merchandise except those sales specifically exempted by law.
How much tax do we pay on a gallon of gasoline and on a gallon of diesel fuel? Federal taxes include excises taxes of 18.3 cents per gallon on gasoline and 24.3 cents per gallon on diesel fuel, and a Leaking Underground Storage Tank fee of 0.1 cents per gallon on both fuels.

Related links

Government Entity Diesel Fuel Tax Return - CDTFA

REPORT OF DIESEL FUEL TRANSACTIONS (report whole gallons only). 1. Total gallons of undyed diesel fuel in tanks at the start of the period.Read more

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Regular Board Meeting

Sep 9, 2025 governmental entity, The Department of Finance must be notified within 45 days. Return excess revenues in the following years in accordance

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