# What number of subdecks will start to cause problems in Anki?

**URL:** <https://forums.ankiweb.net/t/what-number-of-subdecks-will-start-to-cause-problems-in-anki/17663>\
**Category:** Help\
**Created:** [February 17, 2022, 12:44pm UTC](https://forums.ankiweb.net/t/what-number-of-subdecks-will-start-to-cause-problems-in-anki/17663 "2022-02-17T12:44:31Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Jord](https://avatars.discourse-cdn.com/v4/letter/j/57b2e6/32.png) [@Jord](https://forums.ankiweb.net/u/Jord)\
**Post date:** [February 17, 2022, 12:44pm UTC](https://forums.ankiweb.net/t/what-number-of-subdecks-will-start-to-cause-problems-in-anki/17663/1 "2022-02-17T12:44:31Z")

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I have a deck of about 9000 notes broken up into 26 subdecks. I remember reading somewhere that having too many subdecks can cause problems in Anki, so I am wondering if anyone knows whether this is a safe number of subdecks to have?

I am using the latest version of Anki (2.1.49) on a new iPhone and iMac which are also up to date with the latest versions of their respective operating systems.

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**Author:** ![BlackBeans](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/blackbeans/32/2283_2.png) [@BlackBeans](https://forums.ankiweb.net/u/BlackBeans)\
**Post date:** [February 17, 2022, 1:28pm UTC](https://forums.ankiweb.net/t/what-number-of-subdecks-will-start-to-cause-problems-in-anki/17663/2 "2022-02-17T13:28:50Z")

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26 is a reasonable amount of subdecks. 2600 would probably not. If you want to be safe, learn about [tags](https://docs.ankiweb.net/editing.html#using-tags) and use them. They should provide a more flexible alternative to subdecks for most of subdeck usages, so if you use them “normally” you should never have to worry about reaching a maximum number of subdecks.

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**Author:** ![cjdduarte](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/cjdduarte/32/29286_2.png) [@cjdduarte](https://forums.ankiweb.net/u/cjdduarte)\
**Post date:** [February 18, 2022, 9:51pm UTC](https://forums.ankiweb.net/t/what-number-of-subdecks-will-start-to-cause-problems-in-anki/17663/3 "2022-02-18T21:51:48Z")

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I do not have problems.  
I have around 90k cards and around 300 subdecks in up to 5 levels.  
This message was from Anki 2.0.

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**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\
**Post date:** [May 1, 2023, 4:31am UTC](https://forums.ankiweb.net/t/what-number-of-subdecks-will-start-to-cause-problems-in-anki/17663/4 "2023-05-01T04:31:21Z")

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