public function getPaymentFeeVat($shippingAddress)
    {
        $paymentTax = 0;
        $quote = $shippingAddress->getQuote();
        $store = $quote->getStore();
        $fee = $this->getPaymentFeeAmount($quote, $store);

        if ($fee) {
            $config = Mage::getSingleton('adyen_fee/tax_config');
            $custTaxClassId = $quote->getCustomerTaxClassId();
            $taxCalculationModel = Mage::getSingleton('tax/calculation');
            $request = $taxCalculationModel->getRateRequest(
                $shippingAddress, $quote->getBillingAddress(),
                $custTaxClassId, $store
            );
            $paymentTaxClass = $config->getPaymentFeeTaxClass($store);
            $rate = $taxCalculationModel->getRate($request->setProductClassId($paymentTaxClass));
            if ($rate) {
                $paymentTax = $taxCalculationModel->calcTaxAmount(
                    $fee, $rate,
                    $config->paymentFeePriceIncludesTax($store), true
                );
            }
        }

        return $paymentTax;
    }