diff --git a/src/functions.ts b/src/functions.ts
index ec5fa01..4444405 100644
--- a/src/functions.ts
+++ b/src/functions.ts
@@ -3,6 +3,18 @@ const CODE_BLOCK_PLACEHOLDER = "71e46a9e-1150-49c3-a04b-0491ebe05922";
 const INLINE_CODE_PLACEHOLDER = "164b97c2-beb7-4204-99b4-6ec2ddc93f9c";
 const PROPERTY_PLACEHOLDER = "50220b1c-63f0-4f57-aa73-08c4d936a419";
 const MARKDOWN_LINK_PLACEHOLDER = "53c65a4a-137d-44a8-8849-8ec6ca411942";
+const MARKER_PLACEHOLDERS = {
+  NOW: "2f112da4-9248-4e2d-84d5-d9488291799f",
+  LATER: "be8228a3-8d31-4592-b0a5-aa43ce1cab05",
+  DOING: "36080c19-b7d7-4397-8ecf-2bcf670d0204",
+  DONE: "8d03ffae-c539-48da-891a-3020a18812f1",
+  CANCELED: "774f1b24-7533-4c86-93b2-ab4c2cd43b7d",
+  CANCELLED: "7b6a5608-b554-489b-97a3-f9043e436903",
+  "IN-PROGRESS": "842916b9-3f8e-4fd7-8490-6015a30a1dce",
+  TODO: "1f5dc7a6-9479-4692-9f67-8034088395b5",
+  WAIT: "d7a8bdf1-1336-4538-b35b-14459e50046e",
+  WAITING: "d9c67fde-12ae-41e5-9f70-9959c172154b",
+};
 const CUSTOM_QUERY_PLACEHOLDER = "3cf737a1-1a29-4dd1-8db5-45effa23c810";
 
 const parseForRegex = (s: string) => {
@@ -69,6 +81,15 @@ export function replaceContentWithPageLinks(
     return MARKDOWN_LINK_PLACEHOLDER;
   });
 
+  // Replace todo markers with placeholders
+  content = content.replaceAll(
+    /^(NOW|LATER|DOING|DONE|CANCELED|CANCELLED|IN-PROGRESS|TODO|WAIT|WAITING)/gm,
+    (match) => {
+      console.debug({ LogseqAutomaticLinker: "To Do marker found", match });
+      return MARKER_PLACEHOLDERS[match];
+    }
+  );
+
   content = content.replaceAll(
     /#\+BEGIN_QUERY((?!#\+END_QUERY).|\n)*#\+END_QUERY/gim,
     (match) => {
@@ -131,6 +152,9 @@ export function replaceContentWithPageLinks(
   markdownLinkTracker?.forEach((value, index) => {
     content = content.replace(MARKDOWN_LINK_PLACEHOLDER, value);
   });
+  Object.entries(MARKER_PLACEHOLDERS).forEach(([marker, markerPlaceholder]) => {
+    content = content.replaceAll(markerPlaceholder, marker);
+  });
 
   customQueryTracker?.forEach((value, index) => {
     content = content.replace(CUSTOM_QUERY_PLACEHOLDER, value);
diff --git a/tests/functions.test.ts b/tests/functions.test.ts
index fbb9661..37635ac 100644
--- a/tests/functions.test.ts
+++ b/tests/functions.test.ts
@@ -130,6 +130,65 @@ describe("replaceContentWithPageLinks()", () => {
     expect(update).toBe(true);
   });
 
+  it.each([
+    {
+      input: "NOW [#A] A started todo",
+      expected: "NOW [#A] A started [[todo]]",
+    },
+    {
+      input: "LATER [#B] A todo for later",
+      expected: "LATER [#B] A [[todo]] for [[Later]]",
+    },
+    {
+      input: "DOING [#A] Fix the todo marker issue",
+      expected: "DOING [#A] Fix the [[todo]] marker issue",
+    },
+    { input: "DONE A done todo", expected: "DONE A [[Done]] [[todo]]" },
+    {
+      input: "CANCELED A canceled todo",
+      expected: "CANCELED A [[Canceled]] [[todo]]",
+    },
+    {
+      input: "CANCELLED A cancelled todo",
+      expected: "CANCELLED A [[Cancelled]] [[todo]]",
+    },
+    {
+      input: "IN-PROGRESS An in progress To Do",
+      expected: "IN-PROGRESS An [[In Progress]] [[To Do]]",
+    },
+    { input: "TODO A todo", expected: "TODO A [[todo]]" },
+    {
+      input: "WAIT [#C] A todo waiting to be unblocked",
+      expected: "WAIT [#C] A [[todo]] [[Waiting]] to be unblocked",
+    },
+    {
+      input: "WAITING A waiting todo",
+      expected: "WAITING A [[Waiting]] [[todo]]",
+    },
+  ])("should preserve the to do marker for $input", ({ input, expected }) => {
+    let [content, update] = replaceContentWithPageLinks(
+      [
+        "Now",
+        "Later",
+        "Doing",
+        "Done",
+        "Canceled",
+        "Cancelled",
+        "In Progress",
+        "In-Progress",
+        "To Do",
+        "todo",
+        "Wait",
+        "Waiting",
+      ],
+      input,
+      false,
+      false
+    );
+    expect(content).toBe(expected);
+    expect(update).toBe(true);
+  });
+
   it("should output tags when parseAsTags is configured", () => {
     let [content, update] = replaceContentWithPageLinks(
       ["page", "multiple words"],