i6627--2024-01-00

Instructions for Form 6627

Department of the Treasury
Internal Revenue Service

(Rev. January 2024)
Environmental Taxes

Section references are to the Internal Revenue Code unless
otherwise noted.

General Instructions

Future Developments

For the latest information about developments related to Form
6627 and its instructions, such as legislation enacted after they
were published, go to IRS.gov/Form6627.

What’s New

The Inflation Reduction Act of 2022 reinstated the section 4611
Hazardous Substance Superfund financing rate (petroleum
Superfund tax rate) on domestic crude oil and imported
petroleum products, effective January 1, 2023, and stated that
the tax will be indexed for inflation beginning in 2024. The
financing rate is actually two taxes: the Hazardous Substance
Superfund rate that's annually adjusted for inflation, on lines 3a,
4a, and 7; and the $.09 per barrel Oil Spill Liability Trust Fund
financing rate on lines 3b, 4b, and 8. For 2024, the Hazardous
Substance Superfund rate is adjusted for inflation and increased
to $.17 per barrel. See Part I. Tax on Petroleum (IRS Nos. 16, 18,
21, and 53), later, and IRS.gov/irb/2023-48_IRB#NOT-2023-34.
The section 4681 tax rates for ozone-depleting chemicals
(ODCs) are increased for 2024. See Part VI. Tax on Floor
Stocks of ODCs, later.

Reminders
Due to the IRS′ acquiescence in a recent court case, the
section 4611 tax on exported crude oil currently doesn’t
CAUTION apply. See AOD 2023-01, at IRS.gov/Actions on
Decisions.

!

The Infrastructure Investment and Jobs Act reinstated the
section 4661 excise tax on chemicals (other than ODCs) and the
section 4671 tax on imported chemical substances, effective
July 1, 2022 (they previously expired on December 31,1995).
• The tax rates for chemicals (other than ODCs) are listed on
Form 6627, Part II.
• See Table of Taxable Imported Chemical Substances for a
listing of taxable imported chemical substances and the
IRS-provided tax rates for most of the substances. Any
additional tax rates the IRS provides will be available either
online or in the Table of Taxable Imported Chemical Substances
when they become available. Taxpayers are reminded that they
may calculate their own tax rates for imported chemical
substances, regardless of whether the IRS has provided a tax
rate.
• Rev. Proc. 2022-26 provides procedures for requesting a
determination that a substance be added or removed.
• See Notice 2022-15 for information about temporary relief
from the penalty for failure to deposit the 2022 third and fourth
quarter taxes.
• For updates, such as the not yet shown tax rates for taxable
imported chemical substances, or substances recently added or
removed, go to IRS.gov/Form6627. Also see frequently asked
questions and answers.

Purpose of Form

Use this form to figure the environmental taxes on domestic
crude oil and imported petroleum products, chemicals (other
than ozone-depleting chemicals (ODCs)), imported chemical
substances, ODCs, imported products that used ODCs as
materials in the manufacture or production of the product, and
the floor stocks tax on ODCs. If you need more lines for any part
of the form, prepare a continuation sheet using the same format
as the part. Attach the continuation sheet with Form 6627 to
Form 720, Quarterly Federal Excise Tax Return. See Pub. 510,
Excise Taxes, for more information on environmental taxes. See
the Instructions for Form 720 for information on when and where
to file Form 6627.

Who Must File
For Petroleum
1. The operator of the refinery that receives crude oil;
2. The user of crude oil before tax is imposed; and
3. The person entering the petroleum products for
consumption, use, or warehousing.

For Chemicals (other than ODCs)

The manufacturer, producer, or importer of chemicals who sells
or uses those chemicals.

For Imported Chemical Substances

The importer of substances who sells or uses those substances.

For ODCs
1. The manufacturer or importer of ODCs who sells or uses
those ODCs;
2. The importer of taxable products who sells or uses those
products; and
3. The person other than the manufacturer or importer of
ODCs who holds ODCs for sale or use in manufacturing on
January 1, 2024.

Specific Instructions
Part I. Tax on Petroleum (IRS Nos. 16, 18, 21,
and 53)

The tax rate on domestic crude oil and imported petroleum
products is the sum of the Oil Spill Liability Trust Fund financing
rate (petroleum oil spill tax rate) and the Hazardous Substance
Superfund financing rate (petroleum Superfund tax rate). The
petroleum oil spill tax rate is $0.09 per barrel. For 2024, the
petroleum Superfund tax rate is $.17 per barrel (this rate will be
indexed annually for inflation).
Although the domestic crude oil or imported petroleum
products are reported separately, there is no difference in tax
rates. For domestic crude oil, report the petroleum oil spill tax
rate on IRS No. 18 and the petroleum Superfund tax rate on IRS
No. 53. For imported petroleum products, report the petroleum

Feb 26, 2024

Cat. No. 11548F

oil spill tax rate on IRS No. 21 and the petroleum Superfund tax
rate on IRS No. 16.

substance. If using an IRS-provided tax rate, there’s no need to
enter information in column (d).

Crude oil. Tax is imposed on domestic crude oil when it is
received at a U.S. refinery. Crude oil includes crude oil
condensates and natural gasoline. The operator of the refinery is
liable for the tax. Tax is imposed on imported crude oil received
at a U.S. refinery unless the imported petroleum products tax
was imposed when the imported crude oil was entered into the
United States. The operator of a U.S. refinery that receives
imported crude oil must establish that tax was previously
imposed on the imported crude oil.

Column (e). Enter the tax rate of each taxable chemical from
Part II of Form 6627. If you don’t have enough information to
determine the conversion factor and are using an IRS-provided
tax rate, enter that tax rate here. If you don’t have enough
information to determine the conversion factor and you’re figuring
the tax based on the appraised entry value, enter 10% here.

User of crude oil. Tax is imposed on domestic crude oil that’s
used before it is received at a U.S. refinery. The user is liable for
the tax. Crude oil used for extracting oil or natural gas on the
premises where the crude oil is produced is not taxable.
Imported petroleum products. Tax is imposed on imported
petroleum products when they are entered into the United States
for use, consumption, or warehousing. Petroleum products
include crude oil, refined and residual oil, and other liquid
hydrocarbon refinery products. The person entering the
petroleum product into the country is liable for the tax.
The tax on petroleum is imposed only once on any imported
petroleum product. The enterer must provide documentation of
the tax imposed on imported crude oil to the refinery operator if
requested by the refinery operator.

Column (f). Multiply the number of tons in column (b) by the
conversion factor in column (d) by the rate in column (e) for each
taxable chemical listed. If you don’t have enough information to
determine the conversion factor and the IRS has provided a tax
rate, multiply column (b) by column (e). If you don’t have enough
information to determine the conversion factor and the IRS
hasn’t provided a tax rate, you must use the appraised entry
value to figure the tax. To figure the tax using the appraised entry
value, multiply the appraised entry value in column (d) by the
rate (10%) in column (e).

Part IV. Tax on Ozone-Depleting Chemicals
(ODCs), IRS No. 98
The following ODCs are taxable.

Fractional barrels. Fractional barrels are taxed at a
proportionate rate using the fraction produced by the number of
gallons in the barrel over 42 gallons. Multiply the resulting
fraction by the sum of the $0.09 per barrel petroleum oil spill tax
rate and the $.17 per barrel petroleum Superfund tax rate.

Post-1989 ODCs

Part III. Tax on Imported Chemical Substances,
IRS No. 17

The imported chemical substance tax is equal to the chemical
tax that would have been imposed on the taxable chemicals
(listed in Part II of Form 6627) used as materials in the
manufacture of the substance if such substance had been
manufactured in the United States. See Table of Taxable
Imported Chemical Substances for the substances to which the
imported substance tax applies.
To figure the tax, you’ll generally need to know the ratio of the
weight of each taxable chemical used to make the substance to
the total weight of the substance (the conversion factor). If you
don’t have enough information to determine the conversion
factor and the IRS has provided a tax rate for the substance,
either online or in Table of Taxable Imported Chemical
Substances, then that tax rate applies. If you don’t have enough
information to determine the conversion factor and the IRS
hasn’t provided a tax rate for the substance, then the tax is 10%
of the appraised entry value of the substance.
Follow the steps, next, to figure the tax for Part III, lines 1
through 3.
Column (a). Enter the imported chemical substance subject to
tax.
Column (b). Enter the number of tons of the substance
imported and sold or used.
Column (c). Enter each taxable chemical (listed in Part II of
Form 6627) used in the manufacture of the substance. If using
an IRS-provided tax rate or a tax rate based on 10% of the
appraised entry value of the substance, there’s no need to enter
information in column (c).
Column (d). Enter the conversion factor for each taxable
chemical or the appraised entry value of the total amount of the
2

Tax per
Pound in 2024

CFC-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$18.4

CFC-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18.4

CFC-113 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14.72

CFC-114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18.4

CFC-115 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11.04

Halon-1211 . . . . . . . . . . . . . . . . . . . . . . . . . . .

55.2

Halon-1301 . . . . . . . . . . . . . . . . . . . . . . . . . . .

184

Halon-2402 . . . . . . . . . . . . . . . . . . . . . . . . . . .

110.4

Post-1990 ODCs

Tax per
Pound in 2024

Carbon tetrachloride . . . . . . . . . . . . . . . . . . . . .

20.235

Methyl chloroform . . . . . . . . . . . . . . . . . . . . . . .

1.835

CFC-13, CFC-111, CFC-112, and CFC-211 through
CFC-217 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

18.4

!

CAUTION

The tax per pound rates above are figured using the
ozone-depletion factor. Do not multiply the tax per pound
by the ozone-depletion factor.

Mixture elections. Generally, the creation of a mixture
containing one or more ODCs by the manufacturer or importer of
an ODC is treated as the use of the ODC in the mixture.
However, the manufacturer or importer may elect to treat the sale
or use of the mixture as the first sale or use of the ODC in the
mixture.
Post-1989 ODCs (the 1990 election). If this election is
made, the tax on the post-1989 ODCs (listed earlier) contained
in the mixture is imposed on the date of sale or use of the
mixture. To make the election, check the first box in Part IV,
under Elections. This election may be revoked only with the
consent of the IRS.
Post-1990 ODCs (the 1991 election). If this election is
made, the tax on the post-1990 ODCs (listed earlier) contained
Instructions for Form 6627 (Rev. January 2024)

in the mixture is imposed on the date of sale or use of the
mixture. To make the election, check the second box in Part IV,
under Elections. This election may be revoked only with the
consent of the IRS.
Column (c). Enter the tax per pound using the chart earlier.

Part V. ODC Tax on Imported Products, IRS No.
19

An imported taxable product is any product entered into the
United States for consumption, use, or warehousing if any ODC
was used as material in the manufacture or production of the
product. The product must also be listed in the imported
products table issued by the IRS. See Regulations section
52.4682-3(f)(6). The tax is based on the weight of ODCs used in
the manufacture of the product. If the weight can’t be determined
under the exact method or table method (see below), the tax is
1% of the entry value of the product (value method).
Importer election. Generally, an imported taxable product is
taxed when sold or used by the importer. However, an importer
may elect to treat the entry of products into the United States as
the use of such products. This election applies to all products
held by the importer when the election becomes effective, and all
products the importer enters into the United States after the
election becomes effective. If an election applies to an imported
taxable product, tax is imposed on the product on the date of
entry. To make the election, check the box in Part V, under
Elections. This election may be revoked only with the consent of
the IRS.

Figure the ODC Weight of the Product as Follows
Exact method. If you determine the weight of each ODC
used as a material in the manufacture of the product and you can
support this determination, the ODC weight is the weight you
determine.
Table method. If you don’t use the exact method and the
ODC weight is listed in the imported products table, use the
ODC weight listed to figure the tax. See Pub. 510 for more
information.
Follow the steps, next, to figure the tax for Part V, lines 1
through 3.
Column (a). Enter the imported product and the applicable
ODC. Use additional lines if there is more than one ODC.
Column (b). Enter the number of taxable products imported.
Column (c). Enter the ODC weight of the product in pounds. If
you are using the value method, don’t complete this column.
Column (d). Enter the tax per pound from the chart in the
instructions for Part IV, earlier. If you are using the value method,
enter 1% (0.01).

Column (e). If you are using the value method to figure the tax,
enter the entry value of the total number of imported products.
Column (f). Figure the tax due by multiplying the number of
products in column (b) by the ODC weight in column (c) by the
tax per pound in column (d). If you are using the value method,
multiply the 1% (0.01) rate in column (d) by the entry value in
column (e).

Part VI. Tax on Floor Stocks of ODCs

The floor stocks tax for 2024 is imposed on the following ODCs.
ODCs

Tax per
Pound in 2024

CFC-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

$0.45

CFC-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.45

CFC-113 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.36

CFC-114 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.45

CFC-115 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.27

Halon-1211 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.35

Halon-1301 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.50

Halon-2402 . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.70

Carbon tetrachloride . . . . . . . . . . . . . . . . . . . . . .

0.495

Methyl chloroform . . . . . . . . . . . . . . . . . . . . . . . .

0.045

CFC-13, CFC-111, CFC-112, and CFC-211 through
CFC-217 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0.45

!

CAUTION

The tax per pound rates above are figured using the
ozone-depletion factor. Do not multiply the tax per pound
by the ozone-depletion factor.

For 2024, you are liable for the floor stocks tax if, on January
1, you hold any of the following.
1. At least 400 pounds of ODCs, other than halons or methyl
chloroform, subject to the floor stocks tax.
2. At least 50 pounds of halons.
3. At least 1,000 pounds of methyl chloroform.
Report the tax on Form 6627 and Form 720 for the second
calendar quarter of 2024. Payment of the tax is due by June 30,
2024.
Column (c). Enter the tax per pound using the chart above.

Table of Taxable Imported Chemical Substances (Beginning July 1, 2022)
* Tax rate per ton (Rate/Ton) to be determined at a later date and published at IRS.gov/Form6627 as soon as they become available.
Imported Chemical Substance

Rate/Ton ($)

Effective Date

1,3-butylene glycol

7.28

7/1/2022

1,4 butanediol

4.68

7/1/2022

1,5,9-cyclododecatriene

9.74

7/1/2022

2,2,4-trimethyl-1,3-pentanediol diisobutyrate

*

7/1/2022

2,2,4-trimethyl-1,3-pentanediol monoisobutyrate

*

7/1/2022

7.16

7/1/2022

2-ethyl hexanol
Instructions for Form 6627 (Rev. January 2024)

3

Imported Chemical Substance

Rate/Ton ($)

Effective Date

7.34

7/1/2022

*

7/1/2022

acetone

20.06

7/1/2022

acetylene black

10.52

7/1/2022

acrylic acid resins

5.65

7/1/2022

methacrylic acid resins

14.94

7/1/2022

acrylonitrile

9.38

7/1/2022

adipic acid

6.13

7/1/2022

adiponitrile

8.57

7/1/2022

allyl chloride

10.38

7/1/2022

alpha-methylstyrene

9.93

7/1/2022

ammonium nitrate

1.49

7/1/2022

aniline

9.40

7/1/2022

benzaldehyde

8.47

7/1/2022

benzoic acid

7.31

7/1/2022

bisphenol-A

10.23

7/1/2022

butanol

6.31

7/1/2022

butyl acrylate

6.84

7/1/2022

butyl benzyl phthalate

12.15

7/1/2022

carbon tetrachloride

10.62

7/1/2022

chlorinated polyethylene

10.25

7/1/2022

chloroform

10.51

7/1/2022

chromic acid

4.37

7/1/2022

cumene

9.74

7/1/2022

cyclododecanol

9.05

7/1/2022

cyclohexane

10.02

7/1/2022

decabromodiphenyl oxide

17.99

7/1/2022

di-2 ethyl hexyl phthalate

7.37

7/1/2022

diethanolamine

6.01

7/1/2022

diglycidyl ether of bisphenol-A

13.86

7/1/2022

diisopropanolamine

12.76

7/1/2022

dimethyl terephthalate

5.91

7/1/2022

dimethyl-2, 6-naphthalene dicarboxylate

6.81

7/1/2022

di-n-hexyl adipate

8.23

7/1/2022

diphenyl oxide

13.73

7/1/2022

diphenylamine

10.28

7/1/2022

epichlorohydrin

2-ethylhexyl acrylate
acetic acid

12.89

7/1/2022

ethyl acetate

*

7/1/2022

ethyl acrylate

4.09

7/1/2022

ethyl alcohol for nonbeverage use

5.94

7/1/2022

ethyl chloride

4.52

7/1/2022

ethyl methyl ketone

7.60

7/1/2022

ethyl benzene

9.74

7/1/2022

ethylene dibromide

9.03

7/1/2022

4

Instructions for Form 6627 (Rev. January 2024)

Imported Chemical Substance

Rate/Ton ($)

Effective Date

ethylene dichloride

6.62

7/1/2022

ethylene glycol

4.38

7/1/2022

ethylene oxide

6.23

7/1/2022

*

7/1/2022

ferrochrome ov 3 pct. carbon

4.83

7/1/2022

ferrochromium nov 3 pct.

4.83

7/1/2022

ferronickel

*

7/1/2022

formaldehyde

*

7/1/2022

formic acid

*

7/1/2022

glycerine

*

7/1/2022

hexabromocyclododecane

9.11

7/1/2022

hexamethylenediamine

8.93

7/1/2022

*

7/1/2022

isobutyl acetate

4.47

7/1/2022

isophthalic acid

6.23

7/1/2022

isopropyl acetate

4.54

7/1/2022

isopropyl alcohol

6.82

7/1/2022

linear alpha olefins

9.74

7/1/2022

maleic anhydride

5.75

7/1/2022

melamine

4.28

7/1/2022

methanol

*

7/1/2022

methyl acrylate

5.39

7/1/2022

methyl chloroform

6.37

7/1/2022

methyl isobutyl ketone

23.65

7/1/2022

methyl methacrylate

14.75

7/1/2022

methylene chloride

10.33

7/1/2022

monochlorobenzene

10.12

7/1/2022

monoethanolamine

5.96

7/1/2022

monoisopropanolamine

11.74

7/1/2022

nickel oxide

7.03

7/1/2022

nickel powders

*

7/1/2022

nickel waste and scrap

*

7/1/2022

normal butyl acetate

4.47

7/1/2022

normal propyl acetate

3.73

7/1/2022

nylon 6/6

8.67

7/1/2022

ortho-dichlorobenzene

10.35

7/1/2022

ortho-nitrochlorobenzene

7.49

7/1/2022

para-dichlorobenzene

10.35

7/1/2022

*

7/1/2022

para-nitrochlorobenzene

7.49

7/1/2022

para-nitrophenol

8.59

7/1/2022

pentaerythritol

3.86

7/1/2022

perchloroethylene

10.89

7/1/2022

phenol

12.47

7/1/2022

ethylene bistetrabromophthalimide

hydrogen peroxide

paraformaldehyde

Instructions for Form 6627 (Rev. January 2024)

5

Imported Chemical Substance

Rate/Ton ($)

Effective Date

phenolic resins

9.86

7/1/2022

phosphorous pentasulfide

2.49

7/1/2022

phosphorous trichloride

6.21

7/1/2022

phthalic anhydride

7.01

7/1/2022

poly (69/31 ethylene/cyclohexylenedimethylene terephthalate)

*

7/1/2022

poly (96.5/3.5 ethylene/cyclohexylenedimethylene terephthalate)

*

7/1/2022

poly (98.5/1.5 ethylene/cyclohexylenedimethylene terephthalate)

*

7/1/2022

7.21

7/1/2022

*

7/1/2022

poly(propylene)glycol

10.38

7/1/2022

poly(propylene/ethylene)glycol

8.84

7/1/2022

poly(propyleneoxy)glycerol

*

7/1/2022

poly(propyleneoxy)sucrose

2.04

7/1/2022

poly(propyleneoxy/ethyleneoxy)benzenediamine

*

7/1/2022

poly(propyleneoxy/ethyleneoxy)diamine

*

7/1/2022

poly(propyleneoxy/ethyleneoxy)glycerol

*

7/1/2022

poly(propyleneoxy/ethyleneoxy)sucrose

2.57

7/1/2022

polyalphaolefins

11.37

7/1/2022

polybutadiene

9.74

7/1/2022

polybutene

9.74

7/1/2022

polybutylene

9.74

7/1/2022

polybutylene/ethylene

9.74

7/1/2022

polycarbonate

10.84

7/1/2022

polyethylene resins (total)

9.74

7/1/2022

polyethylene terephthalate pellets

6.82

7/1/2022

polypropylene

9.74

7/1/2022

polypropylene resins

9.74

7/1/2022

polystyrene homopolymer resins

9.93

7/1/2022

*

7/1/2022

polyvinylchloride resins

7.46

7/1/2022

propanol

5.47

7/1/2022

propylene glycol

10.38

7/1/2022

propylene oxide

13.60

7/1/2022

*

7/1/2022

styrene

9.93

7/1/2022

styrene-butadiene (latex)

9.84

7/1/2022

poly 1,4 butyleneterephthalate
poly(ethyleneoxy)glycerol

polystyrene resins and copolymers

sodium nitriolotriacetate monohydrate

styrene-butadiene (snpf)

*

7/1/2022

synthetic linear fatty alcohol ethoxylates

7.12

7/1/2022

synthetic linear fatty alcohols

9.29

7/1/2022

*

7/1/2022

terephthalic acid

6.23

7/1/2022

tetrabromobisphenol-A

14.79

7/1/2022

tetrachlorophthalic anhydride

8.95

7/1/2022

tetrahydrofuran

5.78

7/1/2022

synthetic rubber (not containing fillers)

6

Instructions for Form 6627 (Rev. January 2024)

Imported Chemical Substance

Rate/Ton ($)

Effective Date

*

7/1/2022

toluene diisocyanate

10.85

7/1/2022

toluenediamine

9.18

7/1/2022

trichloroethylene

10.79

7/1/2022

triethanolamine

6.04

7/1/2022

triisopropanolamine

12.84

7/1/2022

trimethylolpropane

4.63

7/1/2022

*

7/1/2022

urea

3.01

7/1/2022

vinyl acetate

3.83

7/1/2022

vinyl chloride

7.46

7/1/2022

vinyl resins (nspf)

*

7/1/2022

vinyl resins

*

7/1/2022

wrought nickel rods and wire

*

7/1/2022

texanol benzyl phthalate

unwrought nickel

Instructions for Form 6627 (Rev. January 2024)

7