# Taiwan Taxpayer Identification Number (TIN)

**URL:** <https://tw.forumosa.com/t/taiwan-taxpayer-identification-number-tin/211609>\
**Category:** Taxes\
**Created:** [August 26, 2021, 5:47pm UTC](https://tw.forumosa.com/t/taiwan-taxpayer-identification-number-tin/211609 "2021-08-26T17:47:20Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![treefitty](https://forumosa-12829.kxcdn.com/letter_avatar_proxy/v4/letter/t/e56c9b/32.png) [@treefitty](https://tw.forumosa.com/u/treefitty)\
**Post date:** [August 26, 2021, 5:47pm UTC](https://tw.forumosa.com/t/taiwan-taxpayer-identification-number-tin/211609/1 "2021-08-26T17:47:20Z")

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Sorry this is probably a really dumb question as a first post but I wanted to make sure, is the Taiwan Taxpayer Identification Number (TIN) in Taiwan just our ARC number? I don’t see any mention of it in the tax forms, and maybe because I’m extremely tired right now, the documentation from the MOF website is confusing me.

PDF document with Taiwan TIN info for foreigners  
[https://www.mof.gov.tw/Eng/download/16968](https://www.mof.gov.tw/Eng/download/16968)

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**Author:** ![Marco](https://forumosa-12829.kxcdn.com/user_avatar/tw.forumosa.com/marco/32/179744_2.png) [@Marco](https://tw.forumosa.com/u/Marco)\
**Post date:** [August 26, 2021, 5:58pm UTC](https://tw.forumosa.com/t/taiwan-taxpayer-identification-number-tin/211609/2 "2021-08-26T17:58:30Z")

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It’s just your ARC number.

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**Author:** ![treefitty](https://forumosa-12829.kxcdn.com/letter_avatar_proxy/v4/letter/t/e56c9b/32.png) [@treefitty](https://tw.forumosa.com/u/treefitty)\
**Post date:** [August 26, 2021, 6:00pm UTC](https://tw.forumosa.com/t/taiwan-taxpayer-identification-number-tin/211609/3 "2021-08-26T18:00:33Z")

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Awesome! Thanks Marco 😁

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**Author:** ![zepto](https://forumosa-12829.kxcdn.com/user_avatar/tw.forumosa.com/zepto/32/3969_2.png) [@zepto](https://tw.forumosa.com/u/zepto)\
**Post date:** [March 12, 2026, 3:37pm UTC](https://tw.forumosa.com/t/taiwan-taxpayer-identification-number-tin/211609/4 "2026-03-12T15:37:04Z")

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Digging up old thread - after the ARC numbers changed to the new format, does the TIN change to the new ARC, or we keep the old TIN number?