# Who pays NNS canister cycle costs?

**URL:** <https://forum.dfinity.org/t/who-pays-nns-canister-cycle-costs/7051>\
**Category:** Developers\
**Created:** [September 7, 2021, 12:08am UTC](https://forum.dfinity.org/t/who-pays-nns-canister-cycle-costs/7051 "2021-09-07T00:08:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jzxchiang](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/jzxchiang/32/2592_2.png) [@jzxchiang](https://forum.dfinity.org/u/jzxchiang)\
**Post date:** [September 7, 2021, 12:08am UTC](https://forum.dfinity.org/t/who-pays-nns-canister-cycle-costs/7051/1 "2021-09-07T00:08:38Z")

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Including ledger canister, registry canister, etc…

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**Author:** ![flyq](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/flyq/32/3637_2.png) [@flyq](https://forum.dfinity.org/u/flyq)\
**Post date:** [September 7, 2021, 2:21am UTC](https://forum.dfinity.org/t/who-pays-nns-canister-cycle-costs/7051/2 "2021-09-07T02:21:39Z")

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All processing is free on system subnets(NNS)

> <https://github.com/dfinity/ic/blob/074feaa2c6/rs/config/src/subnet_config.rs#L186-L199>

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**Author:** ![jzxchiang](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/jzxchiang/32/2592_2.png) [@jzxchiang](https://forum.dfinity.org/u/jzxchiang)\
**Post date:** [September 7, 2021, 3:48am UTC](https://forum.dfinity.org/t/who-pays-nns-canister-cycle-costs/7051/3 "2021-09-07T03:48:46Z")

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Wow lucky! Wish I could get it free too.