// Allow id or instance to be passed for $coupon_id.
		if ( $coupon_id instanceof LLMS_Coupon ) {
			$coupon = $coupon_id;
		} else {
			$coupon = new LLMS_Coupon( $coupon_id );
		}

		$price = $this->get( $key );

		// Ensure the coupon *can* be applied to this plan.
		if ( ! $coupon->is_valid( $this ) ) {
			return $price;
		}

		$discount_type = $coupon->get( 'discount_type' );

		// Price and sale price are calculated of coupon amount.
		if ( 'price' === $key || 'sale_price' === $key ) {

			$coupon_amount = $coupon->get( 'coupon_amount' );

		} elseif ( 'trial_price' === $key && $coupon->has_trial_discount() && $this->has_trial() ) {

			$coupon_amount = $coupon->get( 'trial_amount' );

		} else {

			$coupon_amount = 0;

		}

		if ( $coupon_amount ) {

			// Simple subtraction.
			if ( 'dollar' === $discount_type ) {
				$price = $price - $coupon_amount;
			} elseif ( 'percent' === $discount_type ) {
				$price = $price - ( $price * ( $coupon_amount / 100 ) );
			}
		}

		// If price is less than 0 return the pricing text.
		if ( $price <= 0 ) {

			$price = $this->get_free_pricing_text( $format );

		} else {

			if ( 'html' === $format || 'raw' === $format ) {
				$price = llms_price( $price, $price_args );
				if ( 'raw' === $format ) {
					$price = wp_strip_all_tags( $price );
				}
			} elseif ( 'float' === $format ) {
				$price = floatval( number_format( $price, get_lifterlms_decimals(), '.', '' ) );
			} else {
				$price = apply_filters( "llms_get_{$this->model_post_type}_{$key}_{$format}_with_coupon", $price, $key, $price_args, $format, $this );
			}
		}

		return apply_filters( "llms_get_{$this->model_post_type}_{$key}_price_with_coupon", $price, $key, $price_args, $format, $this );

	}