How to associate a pre-existing billing account with a new app engine project in Google cloud console?

Question

I have a pre-existing billing account for an earlier project, that works fine.

How can I associate a new project with that same account?

In the Google Developer Console, if I select the new project and try to enable billing it gives me the forms to create a new billing account. I did not find a way to associate the project's billing to the existing account.

If I look at the existing billing account I can see my earlier project in the list of projects but have found no way add a new project to the account.

Answer 1

If I have enabled billing for one of my applications already, why do I have to do it again for my other apps?

We want to provide developers with fine-grained control over each of their applications. They may wish to have a separate budget for different apps, or apps that run entirely on free quota, rather than a single budget for each.

DOCUMENTATION

Answer 2

Try hitting cancel at the end when it asks you to choose a name for the news billing account. After I did that I was able to associate my second project with my primary billing account. I also noticed some weirdness with a billing account that was in trial mode. Once I "upgraded" this billing account I think I could associate other projects with it.

Of course make sure you are an admin for the billing account and all projects you wish to associate with that billing.