# March 31 - Account Minimum Balance in Effect for Flow

**URL:** <https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416>\
**Category:** Breaking Changes\
**Created:** [March 11, 2021, 5:24pm UTC](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416 "2021-03-11T17:24:12Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![unlocked](https://avatars.discourse-cdn.com/v4/letter/u/3be4f8/32.png) [@unlocked](https://forum.flow.com/u/unlocked)\
**Post date:** [March 11, 2021, 5:24pm UTC](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416/1 "2021-03-11T17:24:12Z")

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On the **Wednesday March 31 Flow MainNet Spork, storage minimum balance requirements and transaction fees will come into effect.**

The following outlines what you need to know for this release:

- What is the FLOW storage minimum?

- How will these fees be enforced and updated?

- Why is this necessary?

- Does the minimum balance needed for an account possibly change over time?

- What do I need to do about this?

- What happens if an account isn’t funded after the spork?

- After the spork, what do we, as service providers and dapps, do differently?

- After the spork, what do users do differently?

- How do I track the storage in a user’s account? How can I top it up?

- How large is a FT? A NFT? How large is the current average account?

- What is the exact error that will be returned if an account falls below its minimum balance?

- What happens if an account falls below the minimum balance?

- What should I do if the user’s account falls below the minimum balance?

- How does this impact contract deployment on MainNet?

- What will transaction fees be? When are transaction fees being turned on?

**NOTE**

These changes will be in effect on CanaryNet as of **March 17 ~12pm PT** if you’d like to test how they impact your service.

- The CanaryNet is where changes are deployed before they are rolled out on TestNet and MainNet - you can access here [https://docs.onflow.org/access-api](https://docs.onflow.org/access-api)

Please test your services prior to the MainNet spork on **April 7.**

Your partners in crossing the chasm - the Flow team

(Updated April 7, 2021 by LL to match new spork dates and new min. balance deposit amount)

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**Author:** ![unlocked](https://avatars.discourse-cdn.com/v4/letter/u/3be4f8/32.png) [@unlocked](https://forum.flow.com/u/unlocked)\
**Post date:** [March 29, 2021, 10:18pm UTC](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416/2 "2021-03-29T22:18:11Z")

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As previously noted, the spork planned for March 31 was to contain and enable the storage balance requirements and transaction fees. A few updates on this are below:

1. We have decided to adjust this MainNet spork date to now be on **Wednesday April 7th, 2021** (1 week later than originally planned).
2. This spork will **ONLY include storage balance requirements** and will **NOT include the enabling of transaction fees**. We will advise when these are being turned on at a later date.
3. You should expect to receive the funds paying this min. account balance from account: `47fd53250cc3982f`
4. The funds are being sent via regular transactions on **Wednesday April 7th** during the spork, so the events will all be queryable by your existing infrastructure.

Also, an amendment to an earlier FAQ for clarity:

- What happens if an account isn’t funded after the spork?
  - If the account is not funded after the spork, it will not be able to participate in any transactions, except transactions that add sufficient FLOW to the account.
  - An account needs at least `0.001 FLOW` or at least `0.1 FLOW / MB` times its storage used. Whichever is larger.

Please let us know if you have any questions on this.

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**Author:** ![uraniumtech](https://avatars.discourse-cdn.com/v4/letter/u/e47774/32.png) [@uraniumtech](https://forum.flow.com/u/uraniumtech)\
**Post date:** [April 25, 2021, 9:52pm UTC](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416/3 "2021-04-25T21:52:45Z")

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When will the upgrade be completed? Deposits and withdrawals are suspended on huobi and the others until the upgrade is completed.

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**Author:** ![flowjosh](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.flow.com/flowjosh/32/362_2.png) [@flowjosh](https://forum.flow.com/u/flowjosh)\
**Post date:** [April 29, 2021, 7:21pm UTC](https://forum.flow.com/t/march-31-account-minimum-balance-in-effect-for-flow/1416/4 "2021-04-29T19:21:49Z")

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@uraniumtech The upgrade has been completed, but Huobi is behind on integrating it with their software. Please reach out to huobi with any issues.