The first method that we covered only allows you to install free themes that are available in the WordPress.org theme’s directory.
What if you want to install a premium WordPress theme from companies like StudioPress, Elegant Themes, Themify, etc.
Or what if you want to install a custom theme? Well, in this case, you would need to install the theme using the upload method from your WordPress admin.
Start by downloading the .zip file of the theme that you purchased from a marketplace or a commercial theme shop.
Next, go to the Appearance » Themes page in WordPress admin area and click on the Add New button at the top.
This will take you to the add new theme page showing featured free themes. Since you already have the theme you want to install, go ahead and click on the ‘Upload Theme’ button at the top.
You will be prompted to choose the zip file that you downloaded earlier. Select the file and click Install Now.
Once your theme is installed, you will see a success message along with the link to activate and preview the theme.
Click on the ‘Activate’ link, and you’ve successfully installed and activated your WordPress theme.
Depending on the theme, it may add additional settings options that you may need to configure either through the theme customizer or through a separate options panel.
Note: The theme upload functionality is only available for self-hosted WordPress users. If you’re using WordPress.com, then you will not see this option because it limits you.
In order to use custom theme upload feature, you would need to use self-hosted WordPress.