diff --git a/.changeset/replace-duplicate-error-utilities.md b/.changeset/replace-duplicate-error-utilities.md
new file mode 100644
index 0000000000..4e7d3d4318
--- /dev/null
+++ b/.changeset/replace-duplicate-error-utilities.md
@@ -0,0 +1,6 @@
+---
+'@backstage/repo-tools': patch
+'@backstage/create-app': patch
+---
+
+Replaced internal error utilities with shared ones from `@backstage/cli-common`.
diff --git a/packages/create-app/src/lib/errors.ts b/packages/create-app/src/lib/errors.ts
index 2f67b94ae1..8e5d2b1423 100644
--- a/packages/create-app/src/lib/errors.ts
+++ b/packages/create-app/src/lib/errors.ts
@@ -14,27 +14,9 @@
  * limitations under the License.
  */
 
+import { ExitCodeError } from '@backstage/cli-common';
 import chalk from 'chalk';
 
-export class CustomError extends Error {
-  get name(): string {
-    return this.constructor.name;
-  }
-}
-
-export class ExitCodeError extends CustomError {
-  readonly code: number;
-
-  constructor(code: number, command?: string) {
-    if (command) {
-      super(`Command '${command}' exited with code ${code}`);
-    } else {
-      super(`Child exited with code ${code}`);
-    }
-    this.code = code;
-  }
-}
-
 export function exitWithError(error: Error): never {
   if (error instanceof ExitCodeError) {
     process.stderr.write(`\n${chalk.red(error.message)}\n\n`);
diff --git a/packages/repo-tools/src/lib/errors.ts b/packages/repo-tools/src/lib/errors.ts
index f4d3cb879b..8e5d2b1423 100644
--- a/packages/repo-tools/src/lib/errors.ts
+++ b/packages/repo-tools/src/lib/errors.ts
@@ -14,27 +14,9 @@
  * limitations under the License.
  */
 
+import { ExitCodeError } from '@backstage/cli-common';
 import chalk from 'chalk';
 
-export class CustomError extends Error {
-  get name(): string {
-    return this.constructor.name;
-  }
-}
-
-export class ExitCodeError extends CustomError {
-  readonly code: number;
-
-  constructor(code: number, command?: string) {
-    super(
-      command
-        ? `Command '${command}' exited with code ${code}`
-        : `Child exited with code ${code}`,
-    );
-    this.code = code;
-  }
-}
-
 export function exitWithError(error: Error): never {
   if (error instanceof ExitCodeError) {
     process.stderr.write(`\n${chalk.red(error.message)}\n\n`);