diff --git a/app/PaymentDrivers/Stripe/ACSS.php b/app/PaymentDrivers/Stripe/ACSS.php
new file mode 100644
index 000000000000..0850f0ee8734
--- /dev/null
+++ b/app/PaymentDrivers/Stripe/ACSS.php
@@ -0,0 +1,184 @@
+<?php
+
+/**
+ * Invoice Ninja (https://invoiceninja.com).
+ *
+ * @link https://github.com/invoiceninja/invoiceninja source repository
+ *
+ * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
+ *
+ * @license https://www.elastic.co/licensing/elastic-license
+ */
+
+namespace App\PaymentDrivers\Stripe;
+
+use App\Exceptions\PaymentFailed;
+use App\Http\Requests\ClientPortal\Payments\PaymentResponseRequest;
+use App\Jobs\Mail\PaymentFailureMailer;
+use App\Jobs\Util\SystemLogger;
+use App\Models\GatewayType;
+use App\Models\Payment;
+use App\Models\PaymentType;
+use App\Models\SystemLog;
+use App\PaymentDrivers\StripePaymentDriver;
+
+class ACSS
+{
+    /** @var StripePaymentDriver */
+    public StripePaymentDriver $stripe;
+
+    public function __construct(StripePaymentDriver $stripe)
+    {
+        $this->stripe = $stripe;
+    }
+
+    public function authorizeView($data)
+    {
+        return render('gateways.stripe.acss.authorize', $data);
+    }
+
+    public function paymentView(array $data)
+    {
+        $data['gateway'] = $this->stripe;
+        $data['return_url'] = $this->buildReturnUrl();
+        $data['stripe_amount'] = $this->stripe->convertToStripeAmount($data['total']['amount_with_fee'], $this->stripe->client->currency()->precision, $this->stripe->client->currency());
+        $data['client'] = $this->stripe->client;
+        $data['customer'] = $this->stripe->findOrCreateCustomer()->id;
+        $data['country'] = $this->stripe->client->country->iso_3166_2;
+
+        $intent = \Stripe\PaymentIntent::create([
+            'amount' => $data['stripe_amount'],
+            'currency' => $this->stripe->client->currency()->code,
+            'setup_future_usage' => 'off_session',
+            'payment_method_types' => ['acss_debit'],
+            'customer' => $this->stripe->findOrCreateCustomer(),
+            'description' => $this->stripe->decodeUnicodeString(ctrans('texts.invoices') . ': ' . collect($data['invoices'])->pluck('invoice_number')),
+            'payment_method_options' => [
+                'acss_debit' => [
+                    'mandate_options' => [
+                        'payment_schedule' => 'combined',
+                        'interval_description' => 'when any invoice becomes due',
+                        'transaction_type' => 'personal' // TODO: check if is company or personal https://stripe.com/docs/payments/acss-debit
+                    ],
+                    'currency' => $this->stripe->client->currency()->code,
+                ]
+            ]
+        ]);
+
+        $data['pi_client_secret'] = $intent->client_secret;
+
+        $this->stripe->payment_hash->data = array_merge((array) $this->stripe->payment_hash->data, ['stripe_amount' => $data['stripe_amount']]);
+        $this->stripe->payment_hash->save();
+
+        return render('gateways.stripe.acss.pay', $data);
+    }
+
+    private function buildReturnUrl(): string
+    {
+        return route('client.payments.response', [
+            'company_gateway_id' => $this->stripe->company_gateway->id,
+            'payment_hash' => $this->stripe->payment_hash->hash,
+            'payment_method_id' => GatewayType::ACSS,
+        ]);
+    }
+
+    public function paymentResponse(PaymentResponseRequest $request)
+    {
+
+        $gateway_response = json_decode($request->gateway_response);
+
+        $this->stripe->payment_hash->data = array_merge((array) $this->stripe->payment_hash->data, $request->all());
+        $this->stripe->payment_hash->save();
+
+        if (property_exists($gateway_response, 'status') && $gateway_response->status == 'processing') {
+
+            $this->stripe->init();
+            $this->storePaymentMethod($gateway_response);
+
+            return $this->processSuccessfulPayment($gateway_response->id);
+        }
+
+        return $this->processUnsuccessfulPayment();
+
+    }
+
+    public function processSuccessfulPayment(string $payment_intent)
+    {
+        /* @todo: https://github.com/invoiceninja/invoiceninja/pull/3789/files#r436175798 */
+
+        $this->stripe->init();
+
+        $data = [
+            'payment_method' => $payment_intent,
+            'payment_type' => PaymentType::ACSS,
+            'amount' => $this->stripe->convertFromStripeAmount($this->stripe->payment_hash->data->stripe_amount, $this->stripe->client->currency()->precision, $this->stripe->client->currency()),
+            'transaction_reference' => $payment_intent,
+            'gateway_type_id' => GatewayType::ACSS,
+        ];
+
+        $this->stripe->createPayment($data, Payment::STATUS_PENDING);
+
+        SystemLogger::dispatch(
+            ['response' => $this->stripe->payment_hash->data, 'data' => $data],
+            SystemLog::CATEGORY_GATEWAY_RESPONSE,
+            SystemLog::EVENT_GATEWAY_SUCCESS,
+            SystemLog::TYPE_STRIPE,
+            $this->stripe->client,
+            $this->stripe->client->company,
+        );
+
+        return redirect()->route('client.payments.index');
+    }
+
+    public function processUnsuccessfulPayment()
+    {
+        $server_response = $this->stripe->payment_hash->data;
+
+        PaymentFailureMailer::dispatch(
+            $this->stripe->client,
+            $server_response,
+            $this->stripe->client->company,
+            $this->stripe->convertFromStripeAmount($this->stripe->payment_hash->data->stripe_amount, $this->stripe->client->currency()->precision, $this->stripe->client->currency())
+        );
+
+        $message = [
+            'server_response' => $server_response,
+            'data' => $this->stripe->payment_hash->data,
+        ];
+
+        SystemLogger::dispatch(
+            $message,
+            SystemLog::CATEGORY_GATEWAY_RESPONSE,
+            SystemLog::EVENT_GATEWAY_FAILURE,
+            SystemLog::TYPE_STRIPE,
+            $this->stripe->client,
+            $this->stripe->client->company,
+        );
+
+        throw new PaymentFailed('Failed to process the payment.', 500);
+    }
+
+    private function storePaymentMethod($intent)
+    {
+        try {
+
+            $method = $this->stripe->getStripePaymentMethod($intent->payment_method);
+
+            $payment_meta = new \stdClass;
+            $payment_meta->brand = (string) \sprintf('%s (%s)', $method->au_becs_debit->bank_code, ctrans('texts.acss'));
+            $payment_meta->last4 = (string) $method->au_becs_debit->last4;
+            $payment_meta->state = 'authorized';
+            $payment_meta->type = GatewayType::ACSS;
+
+            $data = [
+                'payment_meta' => $payment_meta,
+                'token' => $intent->payment_method,
+                'payment_method_id' => GatewayType::ACSS,
+            ];
+
+            $this->stripe->storeGatewayToken($data, ['gateway_customer_reference' => $method->customer]);
+        } catch (\Exception $e) {
+            return $this->stripe->processInternallyFailedPayment($this->stripe, $e);
+        }
+    }
+}
diff --git a/app/PaymentDrivers/StripePaymentDriver.php b/app/PaymentDrivers/StripePaymentDriver.php
index 2673ba974ca0..93cc87f8cd85 100644
--- a/app/PaymentDrivers/StripePaymentDriver.php
+++ b/app/PaymentDrivers/StripePaymentDriver.php
@@ -39,6 +39,7 @@ use App\PaymentDrivers\Stripe\iDeal;
 use App\PaymentDrivers\Stripe\EPS;
 use App\PaymentDrivers\Stripe\Bancontact;
 use App\PaymentDrivers\Stripe\BECS;
+use App\PaymentDrivers\Stripe\ACSS;
 use App\PaymentDrivers\Stripe\UpdatePaymentMethods;
 use App\PaymentDrivers\Stripe\Utilities;
 use App\Utils\Traits\MakesHash;
@@ -89,6 +90,7 @@ class StripePaymentDriver extends BaseDriver
         GatewayType::EPS => EPS::class,
         GatewayType::BANCONTACT => Bancontact::class,
         GatewayType::BECS => BECS::class,
+        GatewayType::ACSS => ACSS::class,
     ];
 
     const SYSTEM_LOG_TYPE = SystemLog::TYPE_STRIPE;
@@ -209,6 +211,13 @@ class StripePaymentDriver extends BaseDriver
             && in_array($this->client->country->iso_3166_3, ["AUS", "DEU"]))
             $types[] = GatewayType::BECS;
 
+        if ($this->client
+            && $this->client->currency()
+            && in_array($this->client->currency()->code, ['CAD', 'USD'])
+            && isset($this->client->country)
+            && in_array($this->client->country->iso_3166_3, ["CAN", "USA"]))
+            $types[] = GatewayType::ACSS;
+
         return $types;
     }
 
@@ -246,6 +255,8 @@ class StripePaymentDriver extends BaseDriver
                 return 'gateways.stripe.bancontact';
             case GatewayType::BECS:
                 return 'gateways.stripe.becs';
+            case GatewayType::ACSS:
+                return 'gateways.stripe.acss';
             default:
                 break;
         }