Gas Guzzler Tax: Form 6197 and Form 720
The gas guzzler tax form is Form 6197, but it doesn't travel alone. It's a worksheet you attach to Form 720, the quarterly return that actually reports the tax. So you're really dealing with one calculation and one line: Form 6197's total goes on the line for IRS No. 40, in Part I of Form 720, labeled "Gas guzzler tax. Attach Form 6197. Check if one-time filing." For the background on what's taxed, see our gas guzzler tax page.
How Form 6197 is laid out
The IRS's published e-file rules describe the working rows of Form 6197, Part I, and they make the structure easy to follow.
| Form 6197, Part I | What it holds | The IRS check |
|---|---|---|
| Lines 2 to 12, column (c) | Tax rate | Taken from the form for that fuel economy row |
| Lines 2 to 12, column (d) | Number of cars sold | Your count |
| Lines 2 to 12, column (e) | Tax due | Must equal column (c) times column (d) |
| Line 13 | Total tax due for the quarter | Must equal the sum of column (e) for lines 2 to 12 |
So you sort cars into the row matching their fuel economy rating, multiply by that row's rate, and total. Pub. 510 and the Form 720 instructions both say the rates are shown on Form 6197, so take them from the current form. The mpg schedule is also on our gas guzzler tax filing page.
Moving Form 6197 to the IRS No. 40 line
- Complete Form 6197 for the quarter.
- Enter line 13 on Form 720, Part I, on the line for IRS No. 40.
- Include it in the Part I total on line 1.
- Complete Schedule A, unless this is a one-time filing. The Part I total line says so directly.
- Attach Form 6197 to Form 720.
IRS e-file rule F720-028-01 requires a non-zero IRS No. 40 amount to equal Form 6197, Part I, line 13. A mismatch is treated as a data mismatch and the return is rejected. Math errors inside the form, under the F6197 rules, are rejected too.
When Form 6197 is due, and do you need to make deposits?
Form 6197 has the same due date as the Form 720 it's attached to. The next dates are below. Where a date falls on a weekend, the return may be filed the next business day.
| Quarter | Standard date | Actual date |
|---|---|---|
| Oct to Dec 2026 | January 31 | Monday, February 1, 2027 |
| Jan to Mar 2027 | April 30 | Friday, April 30, 2027 |
| Apr to Jun 2027 | July 31 | Monday, August 2, 2027 |
| Jul to Sep 2027 | October 31 | Monday, November 1, 2027 |
Because IRS No. 40 is a Part I tax, semimonthly deposits are generally required. A semimonthly period is the first 15 days of a month, or the 16th through the last day. Two exceptions make the tax payable with the return instead:
- Your net Part I liability doesn't exceed $2,500 for the quarter.
- The gas guzzler tax is being paid on a one-time filing.
Part I covers more than cars, so this test uses your whole Part I net liability, not only the gas guzzler amount. The instructions caution that if you don't deposit as required and pay with Form 720 instead, you may face a penalty.
One-time filing: what changes on the forms
Someone who imports a single gas guzzling car outside any trade or business may be eligible. Both conditions apply: you don't import these cars in the course of a trade or business, and you aren't required to file Form 720 for the calendar quarter except for this filing. Our post on the gas guzzler tax for importers covers that situation from the importer's side. Here's what differs on paper:
| Item | Regular filer | One-time filer |
|---|---|---|
| IRS No. 40 checkbox | Not checked | Check the one-time filing box |
| Deposits | Generally required | None. Pay with Form 720. |
| Schedule A | Complete if there is a Part I entry | Leave blank |
| Taxpayer number | EIN | An individual without an EIN enters an SSN or ITIN on Form 720 and Form 720-V |
| Quarter | Every quarter until a final return | The quarter in which you incur liability |
Credits and corrections after filing
If a manufacturer paid the tax on a vehicle later used or resold for an emergency use, it can claim a credit or refund. On Form 720, Schedule C, the reference for gas guzzler automobiles is CRN 340. The Schedule C claim generally must be filed within 3 years from when the return was filed or 2 years from when the tax was paid, whichever is later. Schedule C is available only on a return reporting a liability in Part I or II.
A plain mistake is different. If you miscounted cars or used the wrong row on a filed return, the correction goes on Form 720-X, line 1, with IRS No. 40, rather than on a later Form 720. A decrease on this number may need the line 3b statement, because IRS No. 40 isn't on that line's list of exceptions. That statement says you didn't include the tax in the price and didn't collect it, repaid it to the ultimate purchaser, or attached the purchaser's written consent. Our Form 720-X guide walks through the rest.
Filing the return with your Form 6197 total
Before you begin, finish your Form 6197 count by rating row and have your line 13 total ready. Then you can file Form 720 online with EasyFile720. It's an IRS-authorized e-file provider covering Part I categories and Schedule A, and validations catch common mistakes before you submit. You sign electronically, and you get an IRS acknowledgment once the return is accepted.
An account is free with no credit card, and you pay $39.95 when you file. An importer or maker filing every quarter may prefer the $139.99 Full Year Plan with 4 filing credits. See pricing, or the online filing steps for what to prepare.
FAQ
Which quarter does a sale belong to?▼
Tax attaches when title passes from the manufacturer to the buyer, so use the quarter in which that happened. If you use the car yourself as the manufacturer, tax attaches when use begins.
If I sell no taxable cars this quarter, what do I do with the line?▼
The Form 720 instructions say that if you are not reporting a tax you normally report, enter a zero on the appropriate line in Part I or II.
Can a business make a one-time filing?▼
One-time filing is for someone who does not import gas guzzling automobiles in the course of a trade or business and is not otherwise required to file Form 720 for that quarter.
How do I fix a Form 6197 total I already reported?▼
Adjustments to a prior quarter do not go on a later Form 720. They go on Form 720-X, line 1, using IRS No. 40.
File Form 720 online
Create a free account with no credit card and build your return. You pay $39.95 only when you file. EasyFile720 is an IRS-authorized e-file provider, and you get an acknowledgment when the IRS accepts your return.
Sources: Instructions for Form 720 (Rev. June 2026); Form 720 (Rev. June 2026); Pub. 510 (Rev. December 2025); IRS Form 720 Business Rules Publication 2026Q4 v1.0; Form 720-X (Rev. June 2026). General information, not tax advice. Confirm how the rules apply to you with a qualified advisor or the IRS.
