diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8da32d65..ddb881e7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Features
 
 - Add `@SentrySnapshot` runtime annotation for configuring the per-snapshot diff threshold, published as `io.sentry:sentry-snapshots-runtime` ([EME-1055](https://linear.app/getsentry/issue/EME-1055))
+- Emit `diff_threshold` in the snapshot sidecar JSON when a `@Preview` is also annotated with `@SentrySnapshot(diffThreshold = ...)` ([EME-1055](https://linear.app/getsentry/issue/EME-1055))
 
 ### Dependencies
 
diff --git a/plugin-build/src/main/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTask.kt b/plugin-build/src/main/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTask.kt
index b1ccf329..d0526fcb 100644
--- a/plugin-build/src/main/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTask.kt
+++ b/plugin-build/src/main/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTask.kt
@@ -376,6 +376,17 @@ class $CLASS_NAME(
         if (info.showSystemUi) metadata["show_system_ui"] = true
         if (info.showBackground) metadata["show_background"] = true
 
+        val diffThreshold: Float? = runCatching {
+            val declaring = Class.forName(preview.declaringClass)
+            val method = declaring.declaredMethods.firstOrNull { it.name == preview.methodName }
+                ?: return@runCatching null
+            @Suppress("UNCHECKED_CAST")
+            val annClass = Class.forName("io.sentry.snapshots.runtime.SentrySnapshot") as Class<out Annotation>
+            val ann = method.getAnnotation(annClass) ?: return@runCatching null
+            annClass.getDeclaredMethod("diffThreshold").invoke(ann) as? Float
+        }.getOrNull()
+        if (diffThreshold != null && diffThreshold != 0f) metadata["diff_threshold"] = diffThreshold
+
         val json = metadata.entries.joinToString(",\n  ", prefix = "{\n  ", postfix = "\n}") { (k, v) ->
             if (v is String) "\"" + k + "\": \"" + escapeJson(v) + "\""
             else "\"" + k + "\": " + v
diff --git a/plugin-build/src/test/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTaskTest.kt b/plugin-build/src/test/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTaskTest.kt
index 31832fff..a93e6bad 100644
--- a/plugin-build/src/test/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTaskTest.kt
+++ b/plugin-build/src/test/kotlin/io/sentry/android/gradle/snapshot/GenerateSnapshotTestsTaskTest.kt
@@ -126,6 +126,26 @@ class GenerateSnapshotTestsTaskTest {
     )
   }
 
+  @Test
+  fun `generated sidecar reads SentrySnapshot annotation via reflection`() {
+    val content = generateAndRead(packageTrees = listOf("com.example"))
+
+    assertTrue(content.contains("Class.forName(preview.declaringClass)"))
+    assertTrue(content.contains("\"io.sentry.snapshots.runtime.SentrySnapshot\""))
+    assertTrue(content.contains("getDeclaredMethod(\"diffThreshold\")"))
+  }
+
+  @Test
+  fun `generated sidecar emits diff_threshold only when non-default`() {
+    val content = generateAndRead(packageTrees = listOf("com.example"))
+
+    assertTrue(
+      content.contains(
+        "if (diffThreshold != null && diffThreshold != 0f) metadata[\"diff_threshold\"] = diffThreshold"
+      )
+    )
+  }
+
   @Test
   fun `parseMajorVersion extracts major from standard semver`() {
     assertEquals(1, parseMajorVersion("1.3.5"))