diff --git a/CRM/Twingle/Exceptions/BaseException.php b/CRM/Twingle/Exceptions/BaseException.php
new file mode 100644
index 0000000..f61a4fe
--- /dev/null
+++ b/CRM/Twingle/Exceptions/BaseException.php
@@ -0,0 +1,43 @@
+<?php
+
+use CRM_Twingle_ExtensionUtil as E;
+
+/**
+ * A simple custom exception class that indicates a problem within a class
+ * of the Twingle API extension.
+ */
+class CRM_Twingle_Exceptions_BaseException extends Exception {
+
+  private string $error_code;
+  private string $log_message;
+
+  /**
+   * BaseException Constructor
+   * @param string $message
+   *  Error message
+   * @param string $error_code
+   *  A meaningful error code
+   */
+  public function __construct(string $message = '', string $error_code = '') {
+    parent::__construct($message, 1);
+    $this->log_message = !empty($message) ? E::LONG_NAME . ': ' . $message : '';
+    $this->error_code = $error_code;
+  }
+
+  /**
+   * Returns the error message, but with the extension name prefixed.
+   * @return string
+   */
+  public function getLogMessage() {
+    return $this->log_message;
+  }
+
+  /**
+   * Returns the error code.
+   * @return string
+   */
+  public function getErrorCode() {
+    return $this->error_code;
+  }
+
+}
diff --git a/CRM/Twingle/Exceptions/ProfileException.php b/CRM/Twingle/Exceptions/ProfileException.php
new file mode 100644
index 0000000..1141d10
--- /dev/null
+++ b/CRM/Twingle/Exceptions/ProfileException.php
@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * A simple custom exception that indicates a problem within the
+ * CRM_Twingle_Profile class
+ */
+class CRM_Twingle_Exceptions_ProfileException extends CRM_Twingle_Exceptions_BaseException {
+
+  public const ERROR_CODE_PROFILE_NOT_FOUND = 'profile_not_found';
+  public const ERROR_CODE_DEFAULT_PROFILE_NOT_FOUND = 'default_profile_not_found';
+  public const ERROR_CODE_COULD_NOT_SAVE_PROFILE = 'could_not_save_profile';
+  public const ERROR_CODE_COULD_NOT_RESET_PROFILE = 'could_not_reset_profile';
+  public const ERROR_CODE_COULD_NOT_DELETE_PROFILE = 'could_not_delete_profile';
+  public const ERROR_CODE_UNKNOWN_PROFILE_ATTRIBUTE = 'unknown_profile_attribute';
+
+}
diff --git a/CRM/Twingle/Exceptions/ProfileValidationError.php b/CRM/Twingle/Exceptions/ProfileValidationError.php
new file mode 100644
index 0000000..a1e2b9d
--- /dev/null
+++ b/CRM/Twingle/Exceptions/ProfileValidationError.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * A simple custom error indicating a problem with the validation of the
+ * CRM_Twingle_Profile
+ */
+class CRM_Twingle_Exceptions_ProfileValidationError extends CRM_Twingle_Exceptions_BaseException {
+
+  private string $affected_field_name;
+  public const ERROR_CODE_PROFILE_VALIDATION_FAILED = 'profile_validation_failed';
+
+  /**
+   * ProfileValidationError Constructor
+   * @param string $affected_field_name
+   *  The name of the profile field which caused the exception
+   * @param string $message
+   *  Error message
+   * @param string $error_code
+   *  A meaningful error code
+   */
+  public function __construct(string $affected_field_name, string $message = '', string $error_code = '') {
+    parent::__construct($message, 1);
+    $this->affected_field_name = $affected_field_name;
+  }
+
+  /**
+   * Returns the name of the profile field that caused the exception.
+   * @return string
+   */
+  public function getAffectedFieldName() {
+    return $this->affected_field_name;
+  }
+
+}