diff --git a/includes/abstracts/abstract-wc-shipping-method.php b/includes/abstracts/abstract-wc-shipping-method.php
index a6a77bcaf073f..624c7181c78b8 100644
--- a/includes/abstracts/abstract-wc-shipping-method.php
+++ b/includes/abstracts/abstract-wc-shipping-method.php
@@ -263,7 +263,13 @@ public function add_rate( $args = array() ) {
 		$total_cost = wc_format_decimal( $total_cost, wc_get_price_decimals() );
 
 		// Create rate object
-		$rate = new WC_Shipping_Rate( $args['id'], $args['label'], $total_cost, $taxes, $this->id );
+		$rate = new WC_Shipping_Rate();
+		$rate->set_id( $args['id'] );
+		$rate->set_method_id( $this->id );
+		$rate->set_instance_id( $this->instance_id );
+		$rate->set_label( $args['label'] );
+		$rate->set_cost( $total_cost );
+		$rate->set_taxes( $taxes );
 
 		if ( ! empty( $args['meta_data'] ) ) {
 			foreach ( $args['meta_data'] as $key => $value ) {
diff --git a/includes/class-wc-shipping-rate.php b/includes/class-wc-shipping-rate.php
index c7037928594b9..d0012dcef40ff 100644
--- a/includes/class-wc-shipping-rate.php
+++ b/includes/class-wc-shipping-rate.php
@@ -9,35 +9,35 @@
  *
  * Simple Class for storing rates.
  *
- * @class 		WC_Shipping_Rate
- * @version		2.6.0
- * @package		WooCommerce/Classes/Shipping
- * @category	Class
- * @author 		WooThemes
+ * @class    WC_Shipping_Rate
+ * @package  WooCommerce/Classes/Shipping
+ * @category Class
+ * @author   Automattic
  */
 class WC_Shipping_Rate {
 
-	/** @var string Rate ID. */
-	public $id        = '';
-
-	/** @var string Label for the rate. */
-	public $label     = '';
-
-	/** @var float Cost for the rate. */
-	public $cost      = 0;
-
-	/** @var array Array of taxes for the rate. */
-	public $taxes     = array();
-
-	/** @var string Label for the rate. */
-	public $method_id = '';
+	/**
+	 * Stores data for this rate.
+	 *
+	 * @since 3.2.0
+	 * @var   array
+	 */
+	protected $data = array(
+		'id'          => '',
+		'method_id'   => '',
+		'instance_id' => 0,
+		'label'       => '',
+		'cost'        => 0,
+		'taxes'       => array(),
+	);
 
 	/**
-	 * Stores meta data for this rate
+	 * Stores meta data for this rate.
+	 *
 	 * @since 2.6.0
-	 * @var array
+	 * @var   array
 	 */
-	private $meta_data = array();
+	protected $meta_data = array();
 
 	/**
 	 * Constructor.
@@ -47,35 +47,191 @@ class WC_Shipping_Rate {
 	 * @param integer $cost
 	 * @param array $taxes
 	 * @param string $method_id
+	 * @param int $instance_id
 	 */
-	public function __construct( $id = '', $label = '', $cost = 0, $taxes = array(), $method_id = '' ) {
-		$this->id        = $id;
-		$this->label     = $label;
-		$this->cost      = $cost;
-		$this->taxes     = ! empty( $taxes ) && is_array( $taxes ) ? $taxes : array();
-		$this->method_id = $method_id;
+	public function __construct( $id = '', $label = '', $cost = 0, $taxes = array(), $method_id = '', $instance_id = 0 ) {
+		$this->set_id( $id );
+		$this->set_label( $label );
+		$this->set_cost( $cost );
+		$this->set_taxes( $taxes );
+		$this->set_method_id( $method_id );
+		$this->set_instance_id( $instance_id );
 	}
 
 	/**
-	 * Get shipping tax.
+	 * Magic methods to support direct access to props.
 	 *
-	 * @return array
+	 * @since 3.2.0
+	 * @param string $key
+	 * @return bool
 	 */
-	public function get_shipping_tax() {
-		return apply_filters( 'woocommerce_get_shipping_tax', sizeof( $this->taxes ) > 0 && ! WC()->customer->get_is_vat_exempt() ? array_sum( $this->taxes ) : 0, $this );
+	public function __isset( $key ) {
+		return isset( $this->data[ $key ] );
+	}
+
+	/**
+	 * Magic methods to support direct access to props.
+	 *
+	 * @since 3.2.0
+	 * @param string $key
+	 * @return mixed
+	 */
+	public function __get( $key ) {
+		if ( is_callable( array( $this, "get_{$key}" ) ) ) {
+			return $this->{"get_{$key}"}();
+		} elseif ( isset( $this->data[ $key ] ) ) {
+			return $this->data[ $key ];
+		} else {
+			return '';
+		}
+	}
+
+	/**
+	 * Magic methods to support direct access to props.
+	 *
+	 * @since 3.2.0
+	 * @param string $key
+	 * @param mixed  $value
+	 */
+	public function __set( $key, $value ) {
+		if ( is_callable( array( $this, "set_{$key}" ) ) ) {
+			$this->{"set_{$key}"}( $value );
+		} else {
+			$this->data[ $key ] = $value;
+		}
+	}
+
+	/**
+	 * Set ID for the rate. This is usually a combination of the method and instance IDs.
+	 *
+	 * @since 3.2.0
+	 * @param string $id
+	 */
+	public function set_id( $id ) {
+		$this->data['id'] = (string) $id;
+	}
+
+	/**
+	 * Set shipping method ID the rate belongs to.
+	 *
+	 * @since 3.2.0
+	 * @param string $method_id
+	 */
+	public function set_method_id( $method_id ) {
+		$this->data['method_id'] = (string) $method_id;
+	}
+
+	/**
+	 * Set instance ID the rate belongs to.
+	 *
+	 * @since 3.2.0
+	 * @param int $instance_id
+	 */
+	public function set_instance_id( $instance_id ) {
+		$this->data['method_id'] = absint( $instance_id );
+	}
+
+	/**
+	 * Set rate label.
+	 *
+	 * @since 3.2.0
+	 * @param string $method_id
+	 */
+	public function set_label( $label ) {
+		$this->data['label'] = (string) $label;
+	}
+
+	/**
+	 * Set rate cost.
+	 *
+	 * @since 3.2.0
+	 * @param string $cost
+	 */
+	public function set_cost( $cost ) {
+		$this->data['cost'] = $cost;
+	}
+
+	/**
+	 * Set rate taxes.
+	 *
+	 * @since 3.2.0
+	 * @param array $taxes
+	 */
+	public function set_taxes( $taxes ) {
+		$this->data['taxes'] = ! empty( $taxes ) && is_array( $taxes ) ? $taxes : array();
+	}
+
+	/**
+	 * Set ID for the rate. This is usually a combination of the method and instance IDs.
+	 *
+	 * @since 3.2.0
+	 * @return string
+	 */
+	public function get_id() {
+		return apply_filters( 'woocommerce_shipping_rate_id', $this->data['id'], $this );
+	}
+
+	/**
+	 * Set shipping method ID the rate belongs to.
+	 *
+	 * @since 3.2.0
+	 * @return string
+	 */
+	public function get_method_id() {
+		return apply_filters( 'woocommerce_shipping_rate_method_id', $this->data['method_id'], $this );
+	}
+
+	/**
+	 * Set instance ID the rate belongs to.
+	 *
+	 * @since 3.2.0
+	 * @return int
+	 */
+	public function get_instance_id() {
+		return apply_filters( 'woocommerce_shipping_rate_instance_id', $this->data['instance_id'], $this );
 	}
 
 	/**
-	 * Get label.
+	 * Set rate label.
 	 *
 	 * @return string
 	 */
 	public function get_label() {
-		return apply_filters( 'woocommerce_shipping_rate_label', $this->label, $this );
+		return apply_filters( 'woocommerce_shipping_rate_label', $this->data['label'], $this );
+	}
+
+	/**
+	 * Set rate cost.
+	 *
+	 * @since 3.2.0
+	 * @return string
+	 */
+	public function get_cost() {
+		return apply_filters( 'woocommerce_shipping_rate_cost', $this->data['cost'], $this );
+	}
+
+	/**
+	 * Set rate taxes.
+	 *
+	 * @since 3.2.0
+	 * @return array
+	 */
+	public function get_taxes() {
+		return apply_filters( 'woocommerce_shipping_rate_taxes', $this->data['taxes'], $this );
+	}
+
+	/**
+	 * Get shipping tax.
+	 *
+	 * @return array
+	 */
+	public function get_shipping_tax() {
+		return apply_filters( 'woocommerce_get_shipping_tax', sizeof( $this->taxes ) > 0 && ! WC()->customer->get_is_vat_exempt() ? array_sum( $this->taxes ) : 0, $this );
 	}
 
 	/**
 	 * Add some meta data for this rate.
+	 *
 	 * @since 2.6.0
 	 * @param string $key
 	 * @param string $value
@@ -86,7 +242,9 @@ public function add_meta_data( $key, $value ) {
 
 	/**
 	 * Get all meta data for this rate.
+	 *
 	 * @since 2.6.0
+	 * @return array
 	 */
 	public function get_meta_data() {
 		return $this->meta_data;