diff --git a/TaxBaik.Web.Client/Pages/WasmPing.razor b/TaxBaik.Web.Client/Pages/WasmPing.razor
new file mode 100644
index 0000000..aeafb41
--- /dev/null
+++ b/TaxBaik.Web.Client/Pages/WasmPing.razor
@@ -0,0 +1,13 @@
+@* WASM 기반(M3) 검증용 컴포넌트. 라우팅/렌더모드 전면 적용은 M4에서 처리한다. *@
+@rendermode InteractiveWebAssembly
+
+<MudPaper Class="pa-6 ma-4" Elevation="2">
+    <MudText Typo="Typo.h5" GutterBottom="true">WebAssembly 렌더 모드 점검</MudText>
+    <MudText Typo="Typo.body2" Class="mb-4">이 컴포넌트가 클릭에 반응하면 Interactive WebAssembly 기반이 정상 동작하는 것입니다.</MudText>
+    <MudButton Variant="Variant.Filled" Color="Color.Primary" OnClick="Increment">카운트: @count</MudButton>
+</MudPaper>
+
+@code {
+    private int count;
+    private void Increment() => count++;
+}
diff --git a/TaxBaik.Web.Client/Program.cs b/TaxBaik.Web.Client/Program.cs
new file mode 100644
index 0000000..44d5361
--- /dev/null
+++ b/TaxBaik.Web.Client/Program.cs
@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using MudBlazor.Services;
+
+var builder = WebAssemblyHostBuilder.CreateDefault(args);
+
+// MudBlazor (WASM 측 인터랙티브 컴포넌트용)
+builder.Services.AddMudServices();
+
+// API 호출용 HttpClient — 호스트 base(`/taxbaik/`) 기준
+builder.Services.AddScoped(sp => new HttpClient
+{
+    BaseAddress = new Uri(builder.HostEnvironment.BaseAddress)
+});
+
+builder.Services.AddAuthorizationCore();
+
+await builder.Build().RunAsync();
diff --git a/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj b/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj
new file mode 100644
index 0000000..a427452
--- /dev/null
+++ b/TaxBaik.Web.Client/TaxBaik.Web.Client.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>TaxBaik.WasmClient</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\TaxBaik.Application\TaxBaik.Application.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="10.0.9" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="10.0.9" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.Authorization" Version="10.0.9" />
+    <PackageReference Include="MudBlazor" Version="6.10.0" />
+  </ItemGroup>
+
+</Project>
diff --git a/TaxBaik.Web.Client/_Imports.razor b/TaxBaik.Web.Client/_Imports.razor
new file mode 100644
index 0000000..aa7052b
--- /dev/null
+++ b/TaxBaik.Web.Client/_Imports.razor
@@ -0,0 +1,13 @@
+@using System.Net.Http
+@using System.Net.Http.Json
+@using Microsoft.AspNetCore.Authorization
+@using Microsoft.AspNetCore.Components.Authorization
+@using Microsoft.AspNetCore.Components.Forms
+@using Microsoft.AspNetCore.Components.Routing
+@using Microsoft.AspNetCore.Components.Web
+@using Microsoft.AspNetCore.Components.Web.Virtualization
+@using Microsoft.AspNetCore.Components.WebAssembly.Http
+@using Microsoft.JSInterop
+@using MudBlazor
+@using TaxBaik.WasmClient
+@using static Microsoft.AspNetCore.Components.Web.RenderMode
diff --git a/TaxBaik.Web/Program.cs b/TaxBaik.Web/Program.cs
index 1016372..73ec1b0 100644
--- a/TaxBaik.Web/Program.cs
+++ b/TaxBaik.Web/Program.cs
@@ -54,7 +54,9 @@ builder.Services.AddHealthChecks();
 
 // Razor Pages + Blazor Server 통합
 builder.Services.AddRazorPages();
-builder.Services.AddRazorComponents().AddInteractiveServerComponents();
+builder.Services.AddRazorComponents()
+    .AddInteractiveServerComponents()
+    .AddInteractiveWebAssemblyComponents();
 builder.Services.Configure<Microsoft.AspNetCore.Components.Server.CircuitOptions>(options =>
 {
     options.DetailedErrors = true;
@@ -344,6 +346,8 @@ app.MapRazorPages();
 // 인증은 Blazor AuthorizeRouteView → RedirectToLogin 에서 처리한다.
 app.MapRazorComponents<TaxBaik.Web.Components.Site.App>()
    .AddInteractiveServerRenderMode()
+   .AddInteractiveWebAssemblyRenderMode()
+   .AddAdditionalAssemblies(typeof(TaxBaik.WasmClient._Imports).Assembly)
    .AllowAnonymous();
 
 // 애플리케이션 시작/종료 로깅
diff --git a/TaxBaik.Web/TaxBaik.Web.csproj b/TaxBaik.Web/TaxBaik.Web.csproj
index e0a2ccf..4a4fc36 100644
--- a/TaxBaik.Web/TaxBaik.Web.csproj
+++ b/TaxBaik.Web/TaxBaik.Web.csproj
@@ -3,6 +3,7 @@
   <ItemGroup>
     <ProjectReference Include="..\TaxBaik.Application\TaxBaik.Application.csproj" />
     <ProjectReference Include="..\TaxBaik.Infrastructure\TaxBaik.Infrastructure.csproj" />
+    <ProjectReference Include="..\TaxBaik.Web.Client\TaxBaik.Web.Client.csproj" />
   </ItemGroup>
 
   <PropertyGroup>
@@ -14,6 +15,8 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.FluentUI.AspNetCore.Components" Version="5.0.0-rc.1-26048.1" />
     <PackageReference Include="Microsoft.FluentUI.AspNetCore.Components.Icons" Version="5.0.0-rc.4-26177.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.Server" Version="10.0.9" />
+    <PackageReference Include="MudBlazor" Version="6.10.0" />
     <PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.Google" Version="10.0.9" />
     <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.19.1" />
diff --git a/TaxBaik.sln b/TaxBaik.sln
index 10b5d07..080f874 100644
--- a/TaxBaik.sln
+++ b/TaxBaik.sln
@@ -13,6 +13,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TaxBaik.Web", "TaxBaik.Web\
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TaxBaik.Application.Tests", "TaxBaik.Application.Tests\TaxBaik.Application.Tests.csproj", "{47D1F07D-F11B-4343-A3C3-1872F0C46AE3}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TaxBaik.Web.Client", "TaxBaik.Web.Client\TaxBaik.Web.Client.csproj", "{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -83,6 +85,18 @@ Global
 		{47D1F07D-F11B-4343-A3C3-1872F0C46AE3}.Release|x64.Build.0 = Release|Any CPU
 		{47D1F07D-F11B-4343-A3C3-1872F0C46AE3}.Release|x86.ActiveCfg = Release|Any CPU
 		{47D1F07D-F11B-4343-A3C3-1872F0C46AE3}.Release|x86.Build.0 = Release|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Debug|x64.Build.0 = Debug|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Debug|x86.Build.0 = Debug|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Release|x64.ActiveCfg = Release|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Release|x64.Build.0 = Release|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Release|x86.ActiveCfg = Release|Any CPU
+		{F3DEFE23-E849-4BE6-9E18-C1AF1CDDC7EB}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE