diff --git a/packages/bundler-plugin-core/src/options-mapping.ts b/packages/bundler-plugin-core/src/options-mapping.ts
index d85321a0..762720df 100644
--- a/packages/bundler-plugin-core/src/options-mapping.ts
+++ b/packages/bundler-plugin-core/src/options-mapping.ts
@@ -76,6 +76,7 @@ export type NormalizedOptions = {
   _metaOptions: {
     telemetry: {
       metaFramework: string | undefined;
+      bundlerMajorVersion: string | undefined;
     };
   };
   applicationKey: string | undefined;
@@ -121,6 +122,7 @@ export function normalizeUserOptions(userOptions: UserOptions): NormalizedOption
     _metaOptions: {
       telemetry: {
         metaFramework: userOptions._metaOptions?.telemetry?.metaFramework,
+        bundlerMajorVersion: userOptions._metaOptions?.telemetry?.bundlerMajorVersion,
       },
     },
     applicationKey: userOptions.applicationKey,
diff --git a/packages/bundler-plugin-core/src/sentry/telemetry.ts b/packages/bundler-plugin-core/src/sentry/telemetry.ts
index 70c17b3e..7f48ec4a 100644
--- a/packages/bundler-plugin-core/src/sentry/telemetry.ts
+++ b/packages/bundler-plugin-core/src/sentry/telemetry.ts
@@ -111,6 +111,8 @@ export function setTelemetryDataOnScope(
     bundler: buildTool,
   });
 
+  scope.setTag("bundler-major-version", options._metaOptions.telemetry.bundlerMajorVersion);
+
   scope.setUser({ id: org });
 }
 
diff --git a/packages/bundler-plugin-core/src/types.ts b/packages/bundler-plugin-core/src/types.ts
index 292b6bd5..1c00c94a 100644
--- a/packages/bundler-plugin-core/src/types.ts
+++ b/packages/bundler-plugin-core/src/types.ts
@@ -418,6 +418,10 @@ export interface Options {
        * The meta framework using the plugin.
        */
       metaFramework?: string;
+      /**
+       * The major version of the bundler (e.g., "4" or "5" for webpack).
+       */
+      bundlerMajorVersion?: string;
     };
   };
 }
diff --git a/packages/webpack-plugin/src/index.ts b/packages/webpack-plugin/src/index.ts
index 9b1bfa24..cb4683e1 100644
--- a/packages/webpack-plugin/src/index.ts
+++ b/packages/webpack-plugin/src/index.ts
@@ -8,14 +8,42 @@ const BannerPlugin = webpack4or5?.BannerPlugin || webpack4or5?.default?.BannerPl
 
 const DefinePlugin = webpack4or5?.DefinePlugin || webpack4or5?.default?.DefinePlugin;
 
+// Detect webpack major version for telemetry (helps differentiate webpack 4 vs 5 usage)
+function getWebpackMajorVersion(): string | undefined {
+  try {
+    const webpack = webpack4or5 as unknown as
+      | { version?: string; default?: { version?: string } }
+      | undefined;
+    const version = webpack?.version ?? webpack?.default?.version;
+    const webpackMajorVersion = version?.split(".")[0]; // "4" or "5"
+    return webpackMajorVersion;
+  } catch (error) {
+    return undefined;
+  }
+}
+
+const webpackMajorVersion = getWebpackMajorVersion();
+
 const sentryUnplugin = sentryWebpackUnpluginFactory({
   BannerPlugin,
   DefinePlugin,
 });
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
-export const sentryWebpackPlugin: (options?: SentryWebpackPluginOptions) => any =
-  sentryUnplugin.webpack;
+export const sentryWebpackPlugin: (options?: SentryWebpackPluginOptions) => any = (options) => {
+  const enhancedOptions: SentryWebpackPluginOptions = {
+    ...options,
+    _metaOptions: {
+      ...options?._metaOptions,
+      telemetry: {
+        ...options?._metaOptions?.telemetry,
+        bundlerMajorVersion:
+          options?._metaOptions?.telemetry?.bundlerMajorVersion ?? webpackMajorVersion,
+      },
+    },
+  };
+  return sentryUnplugin.webpack(enhancedOptions);
+};
 
 export { sentryCliBinaryExists } from "@sentry/bundler-plugin-core";