Is it haram to urinate in the shower?

What the hadiths say

The Prophet ﷺ said that none of you should urinate in still water that does not flow and then wash in it (Sahih al-Bukhari 239). Another narration, in Sunan Abi Dawud and other collections, discourages urinating in the place where you bathe, because it leads to doubts and impurity on the body. Scholars of the four schools read these together: urinating in a bathing area is disliked, especially where water collects.

Many scholars add an important detail. The old bathing places were often earth floors with no drain, so urine stayed there. In a modern shower with running water and a drain, the urine is washed away immediately, and the dislike becomes much lighter. Some contemporary scholars say there is no harm at all in that case, as long as you clean properly.

Why care about urine at all?

Islam takes cleanliness from urine seriously. The Prophet ﷺ passed by two graves and said one of the people buried there was punished because he didn't protect himself from his urine (Sahih al-Bukhari 218). That's why Muslims wash after using the toilet and avoid getting sprayed. See What is istinja?

If you do urinate in the shower

• Let the water run so it's washed straight down the drain.
• Wash yourself (istinja) and rinse your feet and the floor where it fell.
• Remember it breaks wudu. If you were planning to count your shower as wudu, you'll need to make wudu after it. See Does a shower count as wudu?
• Never in a bath or any standing water you'll then sit in or wash with; that's exactly what the hadith warns about.

The better habit

The simplest way is to use the toilet before you step into the shower. It avoids any dislike, keeps your ghusl or wudu clean from the start, and stops doubts about whether your feet or the floor are still najis. Sitting or crouching on the toilet also keeps splashes down; see Is it haram to stand while urinating?