diff --git a/.changes/main_binary_name-exe.md b/.changes/main_binary_name-exe.md
new file mode 100644
index 000000000..ba55e61b2
--- /dev/null
+++ b/.changes/main_binary_name-exe.md
@@ -0,0 +1,7 @@
+---
+"tauri-bundler": "patch:bug"
+"tauri-cli": "patch:bug"
+"@tauri-apps/cli": "patch:bug"
+---
+
+Fix `main_binary_name` in custom wix and nsis templates including `.exe`
diff --git a/crates/tauri-bundler/src/bundle/settings.rs b/crates/tauri-bundler/src/bundle/settings.rs
index eaac60a02..616c5f0fc 100644
--- a/crates/tauri-bundler/src/bundle/settings.rs
+++ b/crates/tauri-bundler/src/bundle/settings.rs
@@ -869,13 +869,25 @@ impl Settings {
       .iter()
       .find(|bin| bin.main)
       .context("failed to find main binary, make sure you have a `package > default-run` in the Cargo.toml file")
-      .map(|b| b.name.as_str())
+      .map(|b| b.name())
       .map_err(Into::into)
   }
 
   /// Returns the path to the specified binary.
   pub fn binary_path(&self, binary: &BundleBinary) -> PathBuf {
-    self.project_out_directory.join(binary.name())
+    let target_os = self
+      .target()
+      .split('-')
+      .nth(2)
+      .unwrap_or(std::env::consts::OS);
+
+    let path = self.project_out_directory.join(binary.name());
+
+    if target_os == "windows" {
+      path.with_extension("exe")
+    } else {
+      path
+    }
   }
 
   /// Returns the list of binaries to bundle.
diff --git a/crates/tauri-bundler/src/bundle/windows/nsis.rs b/crates/tauri-bundler/src/bundle/windows/nsis.rs
index 51fdc6c74..37ab9a3e6 100644
--- a/crates/tauri-bundler/src/bundle/windows/nsis.rs
+++ b/crates/tauri-bundler/src/bundle/windows/nsis.rs
@@ -337,7 +337,7 @@ fn build_nsis_app_installer(
   data.insert("language_files", to_json(language_files_paths));
 
   let main_binary = settings.main_binary()?;
-  let main_binary_path = settings.binary_path(main_binary).with_extension("exe");
+  let main_binary_path = settings.binary_path(main_binary);
   data.insert("main_binary_name", to_json(main_binary.name()));
   data.insert("main_binary_path", to_json(&main_binary_path));
 
diff --git a/crates/tauri-cli/src/interface/mod.rs b/crates/tauri-cli/src/interface/mod.rs
index 3dc3dd58e..3c3bc7b30 100644
--- a/crates/tauri-cli/src/interface/mod.rs
+++ b/crates/tauri-cli/src/interface/mod.rs
@@ -32,7 +32,7 @@ pub trait AppSettings {
     features: &[String],
   ) -> crate::Result<tauri_bundler::BundleSettings>;
   fn app_binary_path(&self, options: &Options) -> crate::Result<PathBuf>;
-  fn get_binaries(&self, target: &str) -> crate::Result<Vec<tauri_bundler::BundleBinary>>;
+  fn get_binaries(&self) -> crate::Result<Vec<tauri_bundler::BundleBinary>>;
   fn app_name(&self) -> Option<String>;
   fn lib_name(&self) -> Option<String>;
 
@@ -55,7 +55,7 @@ pub trait AppSettings {
       tauri_utils::platform::target_triple()?
     };
 
-    let mut bins = self.get_binaries(&target)?;
+    let mut bins = self.get_binaries()?;
     if let Some(main_binary_name) = &config.main_binary_name {
       let main = bins.iter_mut().find(|b| b.main()).context("no main bin?")?;
       main.set_name(main_binary_name.to_owned());
diff --git a/crates/tauri-cli/src/interface/rust.rs b/crates/tauri-cli/src/interface/rust.rs
index ccb6594ef..4e2548481 100644
--- a/crates/tauri-cli/src/interface/rust.rs
+++ b/crates/tauri-cli/src/interface/rust.rs
@@ -864,7 +864,7 @@ impl AppSettings for RustAppSettings {
   }
 
   fn app_binary_path(&self, options: &Options) -> crate::Result<PathBuf> {
-    let binaries = self.get_binaries(&self.target_triple)?;
+    let binaries = self.get_binaries()?;
     let bin_name = binaries
       .iter()
       .find(|x| x.main())
@@ -884,15 +884,9 @@ impl AppSettings for RustAppSettings {
     Ok(out_dir.join(bin_name).with_extension(ext))
   }
 
-  fn get_binaries(&self, target: &str) -> crate::Result<Vec<BundleBinary>> {
+  fn get_binaries(&self) -> crate::Result<Vec<BundleBinary>> {
     let mut binaries: Vec<BundleBinary> = vec![];
 
-    let ext = if target.contains("windows") {
-      ".exe"
-    } else {
-      ""
-    };
-
     if let Some(bins) = &self.cargo_settings.bin {
       let default_run = self
         .package_settings
@@ -900,9 +894,12 @@ impl AppSettings for RustAppSettings {
         .clone()
         .unwrap_or_default();
       for bin in bins {
-        let name = format!("{}{}", bin.name, ext);
         let is_main = bin.name == self.cargo_package_settings.name || bin.name == default_run;
-        binaries.push(BundleBinary::with_path(name, is_main, bin.path.clone()))
+        binaries.push(BundleBinary::with_path(
+          bin.name.clone(),
+          is_main,
+          bin.path.clone(),
+        ))
       }
     }
 
@@ -943,7 +940,7 @@ impl AppSettings for RustAppSettings {
         .iter()
         .any(|bin| bin.name() == name || path.ends_with(bin.src_path().unwrap_or(&"".to_string())));
       if !bin_exists {
-        binaries.push(BundleBinary::new(format!("{name}{ext}"), false))
+        binaries.push(BundleBinary::new(name, false))
       }
     }
 
@@ -951,13 +948,13 @@ impl AppSettings for RustAppSettings {
       if let Some(binary) = binaries.iter_mut().find(|bin| bin.name() == default_run) {
         binary.set_main(true);
       } else {
-        binaries.push(BundleBinary::new(format!("{}{}", default_run, ext), true));
+        binaries.push(BundleBinary::new(default_run.clone(), true));
       }
     }
 
     match binaries.len() {
       0 => binaries.push(BundleBinary::new(
-        format!("{}{}", self.cargo_package_settings.name, ext),
+        self.cargo_package_settings.name.clone(),
         true,
       )),
       1 => binaries.get_mut(0).unwrap().set_main(true),