Inland Revenue

1. Oct 2026

First measured October 2026.

1. Civil Defence, at least 0.60 MB
2. Electoral Commission, at least 0.69 MB
3. MSD, 0.72 MB
4. Climate Change Commission, 0.74 MB
5. Treasury, 0.77 MB
6. Internal Affairs, at least 0.83 MB
7. Ministry of Education, 0.97 MB
8. MBIE, 0.99 MB
9. Police, 1.18 MB
10. Ministry of Health, 1.23 MB
11. Te Papa, 1.32 MB
12. Companies Office, 1.34 MB
13. EPA, 1.45 MB
14. NZTA, at least 1.49 MB
15. Ministry of Justice, 1.50 MB
16. Immigration NZ, at least 1.52 MB
17. DOC, 1.69 MB
18. Drive, 1.81 MB
19. StudyLink, 1.89 MB
20. Inland Revenue, 1.98 MB
21. Tenancy Services, 1.99 MB
22. Stats NZ, 2.08 MB
23. Customs, at least 2.09 MB
24. MPI, 2.18 MB
25. Kāinga Ora, 2.25 MB
26. Sorted, 2.40 MB
27. Health NZ, at least 2.68 MB
28. Fire and Emergency, 3.16 MB
29. Earth Sciences New Zealand, 3.20 MB
30. Public Trust, at least 3.42 MB
31. Work and Income, 4.41 MB
32. NZQA, 5.34 MB
33. ACC, 8.73 MB
34. 100% Pure New Zealand, at least 11.07 MB

1. B
2. B
3. B
4. B
5. B
6. B
7. B
8. C
9. C
10. C
11. C
12. C
13. D
14. D
15. D
16. D
17. D
18. D
19. E
20. E
21. E
22. E
23. E
24. E
25. E
26. E
27. F
28. F
29. F
30. F
31. F
32. G
33. G
34. G

LightestHeaviest

• Inland Revenue

• Phone

  2.55 MB

• Laptop

  3.75 MB

First pageiLater pagei

1. Homepage

   /

   First page

   Phone 2.55 MB

   Laptop 3.75 MB

   Later page

   Phone 0.56 MB

   Laptop 1.87 MB

2. Services

   /situations

   First page

   Phone 2.03 MB

   Laptop 2.10 MB

   Later page

   Phone 0.03 MB

   Laptop 0.11 MB

3. News

   /media-releases

   First page

   Phone 2.91 MB

   Laptop 3.20 MB

   Later page

   Phone 0.99 MB

   Laptop 1.19 MB

4. About

   /about-us

   First page

   Phone 1.99 MB

   Laptop 2.07 MB

   Later page

   Phone 0.03 MB

   Laptop 0.03 MB

5. Contact

   /contact-us

   First page

   Phone 2.09 MB

   Laptop 2.08 MB

   Later page

   Phone 0.12 MB

   Laptop 0.04 MB

• Inland Revenue’s own files

  This website

  1.70 MB67%

• Adobe TypeKit

  Hosting and delivery

  0.34 MB13%

• Google Tag Manager

  Tag manager

  0.34 MB13%

• Qualtrics

  Analytics

  0.13 MB5%

• 2 more companies

  Clarity, Utility, 0.03 MB
  New Relic, Utility, 0.01 MB

  0.04 MB2%

• Scripts

  0.95 MB

• Fonts

  0.78 MB

• Images

  0.56 MB

• Styles

  0.23 MB

• Other

  0.04 MB

1. Image · Inland Revenue

   phase-3-july-7-carousel.jpg

   Homepage

   0.50 MB

2. Image · Inland Revenue

   1640x786-desktop-banner-2025---investment-boost_.png

   Homepage

   0.37 MB

3. Image · Inland Revenue

   eoty-2026-carousel.jpg

   Homepage

   0.36 MB

4. Stylesheet · Inland Revenue

   main.css

   Every page

   0.23 MB

5. Image · Inland Revenue

   georges-sentencing.jpg

   News

   0.21 MB

Fix

Nothing a visitor would notice

Choice

Removes or delays something

Worked out on a phone and a laptop. The icons show where each saving applies.

1. Fix

   Ship less of your own code: scripts and styles that did not run while the homepage loaded

   Every page · Inland Revenue Phone

   Saves this on every page

   up to 0.38 MB

2. Fix

   Cut 4 fonts down to the characters used

   Every page · Inland Revenue Phone

   Saves this on every page

   up to 0.33 MB

3. Choice

   Adobe TypeKit: you choose whether it loads

   Every page · Adobe TypeKit Phone

   Saves this on every page

   up to 0.31 MB

4. Choice

   Check every marketing tag still earns its place: 2 companies

   Every page · Google/Doubleclick Ads, Qualtrics Phone

   Saves this on every page

   up to 0.10 MB

5. Fix

   Compress 16 of your own text files

   Every page · Inland Revenue Phone

   Saves this on every page

   up to 0.07 MB

If this website had 100,000 page views a year, they would cause about 18 kg of carbon emissions.

Built to grade A (an average page view of 0.53 MB or less), the same page views would cause about 4.8 kg.

A grade C badge needs an average page view of 1.41 MB or less. Inland Revenue’s is 1.98 MB.