diff --git a/README.md b/README.md
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@@ -8,6 +8,7 @@ Laws, Theories, Patterns and Ideas that all developers should know about!
 * [Introduction](#introduction)
 * [The Laws](#the-laws)
     * [⭐⭐ Conway's Law](#-conways-law)
+    * [⭐ Hofstadter's Law](#-hofstadters-law)
     * [⭐⭐⭐ The Unix Philosophy](#-the-unix-philosophy)
     * [⭐The Spotify Model](#the-spotify-model)
 
@@ -32,6 +33,14 @@ This law suggests that the technical boundaries of a system will reflect the str
 
 See also: 'The Spotify Model'.
 
+### ⭐ Hofstadter's Law
+
+[Hofstadter's Law on Wikipedia](https://en.wikipedia.org/wiki/Hofstadter%27s_law)
+
+> It always takes longer than you expect, even when you take into account Hofstadter's Law.
+
+You might hear this law referred to when looking at estimates for how long something will take. It seems a truism in software development that we tend to not be very good at accurately estimating how long something will take to deliver.
+
 ### ⭐⭐⭐ The Unix Philosophy
 
 [The Unix Philosophy on Wikipedia](https://en.wikipedia.org/wiki/Unix_philosophy)