diff --git a/com.microsoft.copilot.eclipse.core/src/com/microsoft/copilot/eclipse/core/format/FormatOptionProvider.java b/com.microsoft.copilot.eclipse.core/src/com/microsoft/copilot/eclipse/core/format/FormatOptionProvider.java
index 8b06a164..7fbb1e3c 100644
--- a/com.microsoft.copilot.eclipse.core/src/com/microsoft/copilot/eclipse/core/format/FormatOptionProvider.java
+++ b/com.microsoft.copilot.eclipse.core/src/com/microsoft/copilot/eclipse/core/format/FormatOptionProvider.java
@@ -9,6 +9,8 @@
 import org.apache.commons.lang3.StringUtils;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
+import org.eclipse.core.runtime.Platform;
+import org.eclipse.core.runtime.preferences.IPreferencesService;
 import org.eclipse.lsp4j.FormattingOptions;
 
 import com.microsoft.copilot.eclipse.core.CopilotCore;
@@ -26,6 +28,9 @@ public class FormatOptionProvider {
   private static final String CPP_LANGUAGE_ID = "cpp";
   private static final String[] CPP_LANGUAGE_EXTENSIONS = new String[] { "cpp", "c++", "cc", "cp", "cxx", "h", "h++",
       "hh", ".hpp", ".hxx", ".inc", ".inl", ".ipp", ".tcc", ".tpp" };
+  private static final String EDITOR_PREF_NODE = "org.eclipse.ui.editors";
+  private static final String TAB_WIDTH_KEY = "tabWidth";
+  private static final String SPACES_FOR_TABS_KEY = "spacesForTabs";
   private static final boolean DEFAULT_USE_SPACE = LanguageFormatReader.PREFERENCE_DEFAULT_TAB_CHAR.equals("space");
   private static final int DEFAULT_TAB_SIZE = LanguageFormatReader.PREFERENCE_DEFAULT_TAB_SIZE;
 
@@ -110,7 +115,7 @@ private FormattingOptions getLanguageFormat(IFile file) {
     if (languageFormatReaderForProject == null) {
       languageFormatReaderForProject = loadFormatReaderForTheProject(languageId, project);
       if (languageFormatReaderForProject == null) {
-        return new FormattingOptions(DEFAULT_TAB_SIZE, DEFAULT_USE_SPACE);
+        return getEclipseTextEditorFormattingOptions();
       }
       projectToLanguageFormatReaderMap.put(project, languageFormatReaderForProject);
     }
@@ -118,6 +123,38 @@ private FormattingOptions getLanguageFormat(IFile file) {
     return languageFormatReaderForProject.getFormattingOptions();
   }
 
+  /**
+   * Attempts to read the Eclipse default text editor preferences for tab size and spaces-for-tabs.
+   * Falls back to hardcoded defaults if the preferences cannot be read.
+   */
+  private FormattingOptions getEclipseTextEditorFormattingOptions() {
+    try {
+      IPreferencesService service = Platform.getPreferencesService();
+
+      boolean useSpaces = service.getBoolean(
+          EDITOR_PREF_NODE,
+          SPACES_FOR_TABS_KEY,
+          DEFAULT_USE_SPACE,
+          null
+      );
+
+      int tabSize = service.getInt(
+          EDITOR_PREF_NODE,
+          TAB_WIDTH_KEY,
+          DEFAULT_TAB_SIZE,
+          null
+      );
+
+      return new FormattingOptions(tabSize, useSpaces);
+    } catch (Exception e) {
+      CopilotCore.LOGGER.info(
+            "Failed to read Eclipse text editor preferences, using defaults");
+      return new FormattingOptions(DEFAULT_TAB_SIZE, DEFAULT_USE_SPACE);
+    }
+  }
+
+
+
   private LanguageFormatReader loadFormatReaderForTheProject(String languageId, IProject project) {
     switch (languageId) {
       case JAVA_LANGUAGE_ID:
@@ -129,4 +166,4 @@ private LanguageFormatReader loadFormatReaderForTheProject(String languageId, IP
         return null;
     }
   }
-}
\ No newline at end of file
+}