# Can you stack the free tier resources in one instance?

**URL:** <https://community.fly.io/t/can-you-stack-the-free-tier-resources-in-one-instance/19517>\
**Category:** Questions / Help\
**Tags:** machines, billing, login-only\
**Created:** [April 27, 2024, 2:49pm UTC](https://community.fly.io/t/can-you-stack-the-free-tier-resources-in-one-instance/19517 "2024-04-27T14:49:40Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mayailurus](https://sea1.discourse-cdn.com/fly1/user_avatar/community.fly.io/mayailurus/32/17593_2.png) [@mayailurus](https://community.fly.io/u/mayailurus)\
**Post date:** [April 28, 2024, 6:55am UTC](https://community.fly.io/t/can-you-stack-the-free-tier-resources-in-one-instance/19517/2 "2024-04-28T06:55:32Z")

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Hi… “Stacking” is an interesting way of thinking about it… You can do so with the volumes, but not with RAM or CPUs. Even experienced users have scratched their heads over the exact interpretation, though; I believe the following is the most directly worded clarification so far:

> [@I don't understand free-tier!??](https://community.fly.io/t/i-dont-understand-free-tier/5145/5):
>
> > [@I don't understand free-tier!??](https://community.fly.io/t/i-dont-understand-free-tier/5145/3):
> >
> > 1. one 512MB RAM and one 256MB RAM full time?
> 
> This is not quite right. The 512MB RAM VM would create costs as you’d have an extra 256MB (256MB base + 256MB extra) and we’d bill for the extra.

It would be nice if the [docs](https://fly.io/docs/about/pricing/) had more “this is free” / “this is not free” examples, 🦋…

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