diff --git a/change/react-native-windows-2020-03-09-15-18-29-master.json b/change/react-native-windows-2020-03-09-15-18-29-master.json
new file mode 100644
index 00000000000..b964ae969ee
--- /dev/null
+++ b/change/react-native-windows-2020-03-09-15-18-29-master.json
@@ -0,0 +1,9 @@
+{
+  "type": "prerelease",
+  "comment": "Release is Bundle by default, thus BundleCommand should do Release type things.",
+  "packageName": "react-native-windows",
+  "email": "adamgor@microsoft.com",
+  "commit": "c871348bce18eaa180b5223a3fb4343d0c923cd6",
+  "dependentChangeType": "patch",
+  "date": "2020-03-09T22:18:28.823Z"
+}
\ No newline at end of file
diff --git a/packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/SampleAppCpp.vcxproj b/packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/SampleAppCpp.vcxproj
index 37891ebedd2..7ed61040ea4 100644
--- a/packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/SampleAppCpp.vcxproj
+++ b/packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/SampleAppCpp.vcxproj
@@ -63,6 +63,12 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <LinkIncremental>false</LinkIncremental>
   </PropertyGroup>
+  <PropertyGroup>
+    <ReactNativeBundleDevMode>true</ReactNativeBundleDevMode>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <ReactNativeBundleDevMode>false</ReactNativeBundleDevMode>
+  </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
@@ -176,7 +182,7 @@
   <PropertyGroup>
     <BundleCommand>
       cd $(SolutionDir)..
-      npx --no-install react-native bundle --platform windows --entry-file index.windows.js --bundle-output windows/SampleAppCpp/Bundle/index.windows.bundle --assets-dest windows/SampleAppCpp/Bundle
+      npx --no-install react-native bundle --platform windows --entry-file index.windows.js --dev $(ReactNativeBundleDevMode) --bundle-output windows/SampleAppCpp/Bundle/index.windows.bundle --assets-dest windows/SampleAppCpp/Bundle
     </BundleCommand>
   </PropertyGroup>
   <Import Project="$(ReactNativeWindowsDir)\PropertySheets\Bundle.Cpp.targets" />
diff --git a/packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/SampleAppCS.csproj b/packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/SampleAppCS.csproj
index 7206c91b488..4b178520794 100644
--- a/packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/SampleAppCS.csproj
+++ b/packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/SampleAppCS.csproj
@@ -113,6 +113,12 @@
     <Prefer32Bit>true</Prefer32Bit>
     <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain>
   </PropertyGroup>
+  <PropertyGroup>
+    <ReactNativeBundleDevMode>true</ReactNativeBundleDevMode>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <ReactNativeBundleDevMode>false</ReactNativeBundleDevMode>
+  </PropertyGroup>
   <PropertyGroup>
     <ReactNativeWindowsDir Condition="'$(ReactNativeWindowsDir)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'node_modules\react-native-windows\package.json'))\node_modules\react-native-windows\</ReactNativeWindowsDir>
   </PropertyGroup>
@@ -176,7 +182,7 @@
   <PropertyGroup>
     <BundleCommand>
       cd $(SolutionDir)..
-      npx --no-install react-native bundle --platform windows --entry-file index.windows.js --bundle-output windows/SampleAppCS/Bundle/index.windows.bundle --assets-dest windows/SampleAppCS/Bundle
+      npx --no-install react-native bundle --platform windows --entry-file index.windows.js --dev $(ReactNativeBundleDevMode) --bundle-output windows/SampleAppCS/Bundle/index.windows.bundle --assets-dest windows/SampleAppCS/Bundle
     </BundleCommand>
   </PropertyGroup>
   <Import Project="$(ReactNativeWindowsDir)\PropertySheets\Bundle.targets" />
diff --git a/vnext/local-cli/generator-windows/templates/cpp/proj/MyApp.vcxproj b/vnext/local-cli/generator-windows/templates/cpp/proj/MyApp.vcxproj
index de7e6f84a66..44685da54ad 100644
--- a/vnext/local-cli/generator-windows/templates/cpp/proj/MyApp.vcxproj
+++ b/vnext/local-cli/generator-windows/templates/cpp/proj/MyApp.vcxproj
@@ -54,6 +54,12 @@
       <Platform>x64</Platform>
     </ProjectConfiguration>
   </ItemGroup>
+  <PropertyGroup>
+    <ReactNativeBundleDevMode>true</ReactNativeBundleDevMode>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <ReactNativeBundleDevMode>false</ReactNativeBundleDevMode>
+  </PropertyGroup>
   <PropertyGroup Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
@@ -160,7 +166,7 @@
   <PropertyGroup>
     <BundleCommand>
       cd $(SolutionDir)..
-      npx --no-install react-native bundle --platform windows --entry-file index.js --bundle-output windows/$(SolutionName)/Bundle/index.windows.bundle --assets-dest windows/$(SolutionName)/Bundle
+      npx --no-install react-native bundle --platform windows --entry-file index.js --dev $(ReactNativeBundleDevMode) --bundle-output windows/$(SolutionName)/Bundle/index.windows.bundle --assets-dest windows/$(SolutionName)/Bundle
     </BundleCommand>
   </PropertyGroup>
   <Import Project="..\..\node_modules\react-native-windows\PropertySheets\Bundle.Cpp.targets"/>
diff --git a/vnext/local-cli/generator-windows/templates/cs/proj/MyApp.csproj b/vnext/local-cli/generator-windows/templates/cs/proj/MyApp.csproj
index aebcefd3b2e..9208646ad14 100644
--- a/vnext/local-cli/generator-windows/templates/cs/proj/MyApp.csproj
+++ b/vnext/local-cli/generator-windows/templates/cs/proj/MyApp.csproj
@@ -116,6 +116,12 @@
     <Prefer32Bit>true</Prefer32Bit>
     <UseDotNetNativeToolchain>true</UseDotNetNativeToolchain>
   </PropertyGroup>
+  <PropertyGroup>
+    <ReactNativeBundleDevMode>true</ReactNativeBundleDevMode>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)' == 'Release'">
+    <ReactNativeBundleDevMode>false</ReactNativeBundleDevMode>
+  </PropertyGroup>
   <PropertyGroup>
     <RestoreProjectStyle>PackageReference</RestoreProjectStyle>
   </PropertyGroup>
@@ -170,7 +176,7 @@
   <PropertyGroup>
     <BundleCommand>
       cd $(SolutionDir)..
-      npx --no-install react-native bundle --platform windows --entry-file index.js --bundle-output windows/$(SolutionName)/Bundle/index.windows.bundle --assets-dest windows/$(SolutionName)/Bundle
+      npx --no-install react-native bundle --platform windows --entry-file index.js --dev $(ReactNativeBundleDevMode) --bundle-output windows/$(SolutionName)/Bundle/index.windows.bundle --assets-dest windows/$(SolutionName)/Bundle
     </BundleCommand>
   </PropertyGroup>
   <Import Project="..\..\node_modules\react-native-windows\PropertySheets\Bundle.targets"/>