diff --git a/README.md b/README.md
index 1b36e7b..49dcc91 100644
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+++ b/README.md
@@ -75,6 +75,17 @@ $$\begin{array}{c}
 \end{array}$$
 ```
 
+## Syntax
+
+Math parsing in markdown is designed to agree with the conventions set by pandoc:
+
+    Anything between two $ characters will be treated as TeX math. The opening $ must
+    have a non-space character immediately to its right, while the closing $ must
+    have a non-space character immediately to its left, and must not be followed
+    immediately by a digit. Thus, $20,000 and $30,000 won’t parse as math. If for some
+    reason you need to enclose text in literal $ characters, backslash-escape them and
+    they won’t be treated as math delimiters.
+
 ## Math Syntax Support
 
 KaTeX is based on TeX and LaTeX. Support for both is growing. Here's a list of