diff --git a/blocksuite/affine/all/src/__tests__/adapters/latex-currency-escape.unit.spec.ts b/blocksuite/affine/all/src/__tests__/adapters/latex-currency-escape.unit.spec.ts
new file mode 100644
index 0000000000..9feae80c1a
--- /dev/null
+++ b/blocksuite/affine/all/src/__tests__/adapters/latex-currency-escape.unit.spec.ts
@@ -0,0 +1,30 @@
+import { preprocessLatex } from '@blocksuite/affine-block-latex';
+import { describe, expect, test } from 'vitest';
+
+describe('latex preprocessor currency escaping', () => {
+  test.each([
+    ['a plain price', 'costs $5 today', 'costs \\$5 today'],
+    ['a bare amount', '$4', '\\$4'],
+    ['two prices', 'costs $5 and $10', 'costs \\$5 and \\$10'],
+  ])('escapes %s', (_, markdown, expected) => {
+    expect(preprocessLatex(markdown)).toBe(expected);
+  });
+
+  describe('a dollar that is already escaped', () => {
+    // Escaping it again turns the odd backslash run even, which leaves a
+    // literal backslash followed by an unescaped `$` for remark-math.
+    test.each([
+      ['one backslash', 'costs \\$4 today'],
+      ['three backslashes', '\\\\\\$4'],
+      ['several amounts', '\\$4 and \\$10'],
+    ])('is left alone with %s', (_, markdown) => {
+      expect(preprocessLatex(markdown)).toBe(markdown);
+    });
+  });
+
+  test('an even backslash run still has its dollar escaped', () => {
+    // `\\` is a literal backslash, so the `$` after it is unescaped and is a
+    // genuine currency candidate. The run itself must survive untouched.
+    expect(preprocessLatex('costs \\\\$4 today')).toBe('costs \\\\\\$4 today');
+  });
+});
diff --git a/blocksuite/affine/blocks/latex/src/adapters/markdown/preprocessor.ts b/blocksuite/affine/blocks/latex/src/adapters/markdown/preprocessor.ts
index 7f1128a3bb..39f0d957c2 100644
--- a/blocksuite/affine/blocks/latex/src/adapters/markdown/preprocessor.ts
+++ b/blocksuite/affine/blocks/latex/src/adapters/markdown/preprocessor.ts
@@ -32,7 +32,7 @@ function escapeMhchem(text: string) {
  * @param content - The content to preprocess
  * @returns The preprocessed content
  */
-function preprocessLatex(content: string) {
+export function preprocessLatex(content: string) {
   // Protect code blocks
   const codeBlocks: string[] = [];
   let preprocessedContent = content;
@@ -54,8 +54,17 @@ function preprocessLatex(content: string) {
     }
   );
 
-  // Escape dollar signs that are likely currency indicators
-  preprocessedContent = preprocessedContent.replace(/\$(?=\d)/g, '\\$');
+  // Escape dollar signs that are likely currency indicators.
+  //
+  // A dollar preceded by an odd number of backslashes is already escaped, so
+  // adding another backslash makes the run even: `\$4` becomes `\\$4`, which is
+  // a literal backslash followed by an unescaped `$` that remark-math can then
+  // treat as a delimiter. Only escape a dollar whose preceding backslash run is
+  // even, and keep that run as it was.
+  preprocessedContent = preprocessedContent.replace(
+    /(?<!\\)((?:\\\\)*)\$(?=\d)/g,
+    '$1\\$'
+  );
 
   // Restore LaTeX expressions
   preprocessedContent = preprocessedContent.replace(