There is no one-size-fits-all answer to this question, as the need for an EIN will vary depending on the size, structure, and purpose of your blog. However, if your blog is primarily for personal use and does not generate income (e.g., you are not selling products or services), you may not need an EIN.
If your blog generates income (e.g., through advertising or affiliate links), you will likely need an EIN.
In general, if your blog is a personal website or blog that does not generate income from third-party sources, you may not need an EIN. If your blog generates income from third-party sources (such as advertising or affiliate links), you will likely need an EIN.
A final consideration is whether you plan to monetize your blog. If you do not plan to monetize your blog, then you may not need an EIN.
If you plan to monetize your blog, then you will likely need an EIN in order to operate as a business and file tax returns (Form 1040) using the EIN as your business name.