Environmental Taxes

• Legal Form Number: 6627
• Year: 2026
• Issuer: Treasury Department
• Section: Treasury Department

Form 6627

(Rev. January 2024)

Department of the Treasury

Internal Revenue Service

Environmental Taxes

Attach to Form 720.

Go to www.irs.gov/Form6627 for instructions and the latest information.

OMB No. 1545-0023

Name (as shown on Form 720) Quarter ending Employer identification number (EIN)

Part I Tax on Petroleum (a)

Barrels

(b)

Rate

(c)

Tax

1Crude oil received at a U.S. refinery . . . . . . . . . . . .

2Crude oil taxed before receipt at refinery . . . . . . . . . .

3Taxable crude oil. Subtract line 2 from line 1. Enter the result on both

lines 3(a) and 3(b), column (a). Enter in column (c) the amount of tax by

multiplying column (a) by column (b) for both lines. (a) $ .17 bbl $

(b)

$ .09 bbl $

4Crude oil used in the U.S. before the tax was imposed. Multiply column

(a) by column (b) and enter the amount of tax in column (c). Enter on both

lines 4(a) and 4(b), column (a). Enter in column (c) the amount of tax by

multiplying column (a) by column (b) for both lines.

(a)

$ .17 bbl $

(b)

$ .09 bbl $

5 Total domestic petroleum superfund tax (add lines 3(a) and 4(a), column

(c)). Enter here and on Form 720 on the line for IRS No. 53 . . . . $

6 Total domestic petroleum oil spill tax. Add lines 3(b) and 4(b), column (c).

Enter the total here and on Form 720 on the line for IRS No. 18 . . . $

7Imported petroleum products superfund tax. Enter the number of barrels

imported in column (a). (Must agree with line 8, column (a).) Enter in

column (c) the amount of tax by multiplying column (a) by column (b), and

also enter it on Form 720 on the line for IRS No. 16 ....... $ .17 bbl $

8Imported petroleum products oil spill tax. Enter the number of barrels

imported in column (a). (Must agree with line 7, column (a).) Multiply

column (a) by column (b) and enter the amount of tax in column (c). Also

enter the amount on Form 720 on the line for IRS No. 21 ..... $ .09 bbl $

Part II Tax on Chemicals (Other Than Ozone-Depleting Chemicals (ODCs)), IRS No. 54

Chemical

(general formula

or symbol)

(a) Tons (b) Rate

(c) Tax

(multiply column (a)

by column (b))

1Acetylene (C2H2) $9.74

2Ammonia (NH3) . 5.28

3Antimony (Sb) . 8.90

4 Antimony trioxide

(Sb2O3) . . . 7.50

5Arsenic (As) . . 8.90

6 Arsenic trioxide

(As2O3) . . . . 6.82

7

Barium sulfide (BaS)

4.60

8Benzene (C6H6) . 9.74

9Bromine (Br) . . 8.90

10 Butadiene (C4H6) 9.74

11 Butane (C4H10) . 9.74

12 Butylene (C4H8) . 9.74

13 Cadmium (Cd) . 8.90

14 Chlorine (Cl) . . 5.40

15

Chromite (FeCr2O4)

3.04

16 Chromium (Cr) . 8.90

17 Cobalt (Co) . . 8.90

18

Cupric oxide (CuO)

7.18

19

Cupric sulfate (CuSO4)

3.74

20

Cuprous oxide (Cu2O)

7.94

21 Ethylene (C2H4) . 9.74

22

Hydrochloric acid (HCI)

0.58

23

Hydrogen fluoride (HF)

8.46

Chemical

(general formula

or symbol)

(a) Tons (b) Rate

(c) Tax

(multiply column (a)

by column (b))

24 Lead oxide (PbO) $8.28

25 Mercury (Hg) . . 8.90

26 Methane (CH4) . 6.88

27

Naphthalene (C10H8)

9.74

28 Nickel (Ni) . . . 8.90

29 Nitric acid (HNO3) 0.48

30 Phosphorus (P) . 8.90

31

Potassium

dichromate (K2Cr2O7)

3.38

32 Potassium

hydroxide (KOH) . 0.44

33 Propylene (C3H6) . 9.74

34

Sodium dichromate

(NaCr2O7) . . .

3.74

35

Sodium hydroxide

(NaOH) . . . .

0.56

36

Stannic chloride

(SnCl4) . . . .

4.24

37

Stannous chloride

(SnCl2) . . . .

5.70

38

Sulfuric acid (H2SO4)

0.52

39 Toluene (C7H8) . 9.74

40 Xylene (C8H10) . 9.74

41

Zinc chloride (ZnCl2)

4.44

42

Zinc sulfate (ZnSO4)

3.80

43

Total Chemical Tax (add lines 1–42, column (c)). Enter here and on Form 720 on the line for IRS No. 54

$

For Privacy Act and Paperwork Reduction Act Notice, see the Instructions for Form 720. Cat. No. 43490I Form 6627 (Rev. 1-2024)