diff --git a/modules/log/commerce_log.commerce_log_categories.yml b/modules/log/commerce_log.commerce_log_categories.yml
index b921707752..8ea861b096 100644
--- a/modules/log/commerce_log.commerce_log_categories.yml
+++ b/modules/log/commerce_log.commerce_log_categories.yml
@@ -5,3 +5,7 @@ commerce_cart:
 commerce_order:
   label: Order
   entity_type: commerce_order
+
+commerce_payment:
+  label: Payment
+  entity_type: commerce_payment
diff --git a/modules/log/commerce_log.commerce_log_templates.yml b/modules/log/commerce_log.commerce_log_templates.yml
index a9aee4860d..8e0e2ba06d 100644
--- a/modules/log/commerce_log.commerce_log_templates.yml
+++ b/modules/log/commerce_log.commerce_log_templates.yml
@@ -27,3 +27,12 @@ order_assigned:
   category: commerce_order
   label: 'Order assigned'
   template: '<p>The order was assigned to {{ user }}.</p>'
+
+payment_log:
+  category: commerce_payment
+  label: 'Payment log'
+  template: '<p>{% if new %} New payment {% else %} Payment {% endif %} {% if remote_id %} {{ remote_id }} {% else %} {{ id }} {% endif %} {% if not previous_amount %} of {{ amount|commerce_price_format }} {% endif %} in state {{ state}} {% if previous_amount %} was changed from {{ previous_amount|commerce_price_format }} to {{ amount|commerce_price_format }} {% endif %}.</p>'
+payment_refunded:
+  category: commerce_payment
+  label: 'Payment refunded'
+  template: '<p>{% if new %} New payment {% else %} Payment {% endif %} {% if remote_id %} {{ remote_id }} {% else %} {{ id }} {% endif %} was refunded {{ refunded_amount|commerce_price_format }}  and is now in state {{ state }}.</p>'
diff --git a/modules/log/commerce_log.module b/modules/log/commerce_log.module
index 9c4927c624..79d0d105ca 100644
--- a/modules/log/commerce_log.module
+++ b/modules/log/commerce_log.module
@@ -5,6 +5,8 @@
  * Provides activity logs for Commerce entities.
  */
 
+use Drupal\commerce_log\PaymentListBuilder;
+
 /**
  * Implements hook_preprocess_commerce_order().
  */
@@ -20,3 +22,13 @@ function commerce_log_preprocess_commerce_order(&$variables) {
     '#title' => t('Order activity'),
   ];
 }
+
+/**
+ * Implements hook_entity_type_alter() for commerce_payment.
+ */
+function commerce_log_entity_type_alter(array &$entity_types) {
+  if (isset($entity_types['commerce_payment'])) {
+    /** @var \Drupal\Core\Entity\EntityTypeInterface[] $entity_types */
+    $entity_types['commerce_payment']->setListBuilderClass(PaymentListBuilder::class);
+  }
+}
diff --git a/modules/log/config/install/views.view.commerce_activity.yml b/modules/log/config/install/views.view.commerce_activity.yml
index 05014113a5..9c7ce437f4 100644
--- a/modules/log/config/install/views.view.commerce_activity.yml
+++ b/modules/log/config/install/views.view.commerce_activity.yml
@@ -288,7 +288,7 @@ display:
           entity_type: commerce_log
           entity_field: log_id
           plugin_id: standard
-      title: 'Order logs'
+      title: 'Order activity'
       header: {  }
       footer: {  }
       empty:
diff --git a/modules/log/src/CommerceLogServiceProvider.php b/modules/log/src/CommerceLogServiceProvider.php
index 769cc5fc21..2998d9623b 100644
--- a/modules/log/src/CommerceLogServiceProvider.php
+++ b/modules/log/src/CommerceLogServiceProvider.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\commerce_log;
 
+use Drupal\commerce_log\EventSubscriber\PaymentEventSubscriber;
 use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Core\DependencyInjection\ServiceProviderBase;
 use Symfony\Component\DependencyInjection\Reference;
@@ -29,6 +30,11 @@ public function register(ContainerBuilder $container) {
         ->addTag('event_subscriber')
         ->addArgument(new Reference('entity_type.manager'));
     }
+    if (isset($modules['commerce_payment'])) {
+      $container->register('commerce_log.payment_subscriber', PaymentEventSubscriber::class)
+        ->addTag('event_subscriber')
+        ->addArgument(new Reference('entity_type.manager'));
+    }
   }
 
 }
diff --git a/modules/log/src/EventSubscriber/PaymentEventSubscriber.php b/modules/log/src/EventSubscriber/PaymentEventSubscriber.php
new file mode 100644
index 0000000000..d03840b093
--- /dev/null
+++ b/modules/log/src/EventSubscriber/PaymentEventSubscriber.php
@@ -0,0 +1,108 @@
+<?php
+
+namespace Drupal\commerce_log\EventSubscriber;
+
+use Drupal\commerce_payment\Entity\PaymentInterface;
+use Drupal\commerce_payment\Event\PaymentEvent;
+use Drupal\commerce_payment\Event\PaymentEvents;
+use Drupal\commerce_price\Calculator;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+class PaymentEventSubscriber implements EventSubscriberInterface {
+
+  /**
+   * The log storage.
+   *
+   * @var \Drupal\commerce_log\LogStorageInterface
+   */
+  protected $logStorage;
+
+  /**
+   * Constructs a new PaymentEventSubscriber object.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The entity type manager.
+   *
+   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
+   */
+  public function __construct(EntityTypeManagerInterface $entity_type_manager) {
+    $this->logStorage = $entity_type_manager->getStorage('commerce_log');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    $events = [
+      PaymentEvents::PAYMENT_PRESAVE => ['onPaymentPresave', -100],
+      PaymentEvents::PAYMENT_PREDELETE => ['onPaymentPredelete', -100],
+    ];
+    return $events;
+  }
+
+  /**
+   * Creates a log before a payment is saved.
+   *
+   * @param \Drupal\commerce_payment\Event\PaymentEvent $event
+   *   The payment event.
+   *
+   * @throws \Drupal\Core\Entity\EntityStorageException
+   */
+  public function onPaymentPresave(PaymentEvent $event) {
+    $this->logPayment($event->getPayment());
+  }
+
+  /**
+   * Creates a log when a payment is deleted.
+   *
+   * @param \Drupal\commerce_payment\Event\PaymentEvent $event
+   *   The payment event.
+   *
+   * @throws \Drupal\Core\Entity\EntityStorageException
+   */
+  public function onPaymentPredelete(PaymentEvent $event) {
+    $event->getPayment()->setState('deleted');
+    $this->logPayment($event->getPayment());
+  }
+
+  /**
+   * Creates a log when a payment is changed.
+   *
+   * @param \Drupal\commerce_payment\Entity\PaymentInterface $payment
+   *   The payment.
+   *
+   * @throws \Drupal\Core\Entity\EntityStorageException
+   */
+  protected function logPayment(PaymentInterface $payment) {
+    $refund = $payment->getRefundedAmount();
+    $isNew = $payment->isNew();
+    $previousAmount = FALSE;
+    if (!empty($payment->original) && !$payment->getAmount()->equals($payment->original->getAmount())) {
+      $previousAmount = $payment->original->getAmount();
+    }
+    if ($refund && Calculator::trim($refund->getNumber())) {
+      if (!empty($payment->original) && !$payment->getRefundedAmount()->equals($payment->original->getRefundedAmount())) {
+        $refund = $payment->getRefundedAmount()->subtract($payment->original->getRefundedAmount());
+      }
+      $this->logStorage->generate($payment->getOrder(), 'payment_refunded', [
+        'id' => $payment->id(),
+        'remote_id' => $payment->getRemoteId(),
+        'refunded_amount' => $refund,
+        'state' => $payment->getState()->value,
+        'new' => $isNew,
+      ])->save();
+    }
+    else {
+      $this->logStorage->generate($payment->getOrder(), 'payment_log', [
+        'id' => $payment->id(),
+        'remote_id' => $payment->getRemoteId(),
+        'new' => $isNew,
+        'amount' => $payment->getAmount(),
+        'previous_amount' => $previousAmount,
+        'state' => $payment->getState()->value,
+      ])->save();
+    }
+  }
+
+}
diff --git a/modules/log/src/PaymentListBuilder.php b/modules/log/src/PaymentListBuilder.php
new file mode 100644
index 0000000000..65d38b0401
--- /dev/null
+++ b/modules/log/src/PaymentListBuilder.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Drupal\commerce_log;
+
+use Drupal\commerce_payment\PaymentListBuilder as BasePaymentListBuilder;
+
+/**
+ * Overrides the list builder for payments.
+ */
+class PaymentListBuilder extends BasePaymentListBuilder {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function render() {
+    $build = parent::render();
+    $entities = $this->load();
+    /** @var \Drupal\commerce_payment\Entity\PaymentInterface $payment */
+    $payment = reset($entities);
+    if ($payment) {
+      $build['log']['title'] = [
+        '#markup' => '<h3>' . $this->t('Order activity') . '</h3>',
+      ];
+      $build['log']['activity'] = [
+        '#type' => 'view',
+        '#name' => 'commerce_activity',
+        '#display_id' => 'default',
+        '#arguments' => [$payment->getOrder()->id(), 'commerce_order'],
+        '#embed' => FALSE,
+      ];
+    }
+    return $build;
+  }
+
+}
diff --git a/modules/payment/src/Entity/Payment.php b/modules/payment/src/Entity/Payment.php
index f887f6f957..697473add7 100644
--- a/modules/payment/src/Entity/Payment.php
+++ b/modules/payment/src/Entity/Payment.php
@@ -26,6 +26,7 @@
  *   bundle_plugin_type = "commerce_payment_type",
  *   handlers = {
  *     "access" = "Drupal\commerce_payment\PaymentAccessControlHandler",
+ *     "event" = "Drupal\commerce_payment\Event\PaymentEvent",
  *     "list_builder" = "Drupal\commerce_payment\PaymentListBuilder",
  *     "storage" = "Drupal\commerce_payment\PaymentStorage",
  *     "form" = {
diff --git a/modules/payment/src/Event/PaymentEvent.php b/modules/payment/src/Event/PaymentEvent.php
new file mode 100644
index 0000000000..dcac009bf4
--- /dev/null
+++ b/modules/payment/src/Event/PaymentEvent.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace Drupal\commerce_payment\Event;
+
+use Drupal\commerce_payment\Entity\PaymentInterface;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Defines the payment event.
+ *
+ * @see \Drupal\commerce_payment\Event\PaymentEvents
+ */
+class PaymentEvent extends Event {
+
+  /**
+   * The payment.
+   *
+   * @var \Drupal\commerce_payment\Entity\PaymentInterface
+   */
+  protected $payment;
+
+  /**
+   * Constructs a new PaymentEvent.
+   *
+   * @param \Drupal\commerce_payment\Entity\PaymentInterface $payment
+   *   The payment.
+   */
+  public function __construct(PaymentInterface $payment) {
+    $this->payment = $payment;
+  }
+
+  /**
+   * Gets the payment.
+   *
+   * @return \Drupal\commerce_payment\Entity\PaymentInterface
+   *   The payment.
+   */
+  public function getPayment() {
+    return $this->payment;
+  }
+
+}
diff --git a/modules/payment/src/Event/PaymentEvents.php b/modules/payment/src/Event/PaymentEvents.php
index 9a4abfeab3..eb73d3988e 100644
--- a/modules/payment/src/Event/PaymentEvents.php
+++ b/modules/payment/src/Event/PaymentEvents.php
@@ -10,7 +10,74 @@ final class PaymentEvents {
    * @Event
    *
    * @see \Drupal\commerce_payment\Event\FilterPaymentGatewaysEvent
+   *
+   * @var string
    */
   const FILTER_PAYMENT_GATEWAYS = 'commerce_payment.filter_payment_gateways';
 
+
+  /**
+   * Name of the event fired after loading a payment.
+   *
+   * @Event
+   *
+   * @see \Drupal\commerce_payment\Event\PaymentEvent
+   *
+   * @var string
+   */
+  const PAYMENT_LOAD = 'commerce_payment.commerce_payment.load';
+
+  /**
+   * Name of the event fired before saving a payment.
+   *
+   * @Event
+   *
+   * @see \Drupal\commerce_payment\Event\PaymentEvent
+   *
+   * @var string
+   */
+  const PAYMENT_PRESAVE = 'commerce_payment.commerce_payment.presave';
+
+  /**
+   * Name of the event fired after saving a new payment.
+   *
+   * @Event
+   *
+   * @see \Drupal\commerce_payment\Event\PaymentEvent
+   */
+  const PAYMENT_INSERT = 'commerce_payment.commerce_payment.insert';
+
+  /**
+   * Name of the event fired after saving an existing payment.
+   *
+   * @Event
+   *
+   * @see \Drupal\commerce_payment\Event\PaymentEvent
+   *
+   * @var string
+   */
+  const PAYMENT_UPDATE = 'commerce_payment.commerce_payment.update';
+
+  /**
+   * Name of the event fired before deleting a payment.
+   *
+   * @Event
+   *
+   * @see \Drupal\commerce_payment\Event\PaymentEvent
+   *
+   * @var string
+   */
+  const PAYMENT_PREDELETE = 'commerce_payment.commerce_payment.predelete';
+
+  /**
+   * Name of the event fired after deleting a payment.
+   *
+   * @Event
+   *
+   * @see \Drupal\commerce_payment\Event\PaymentEvent
+   *
+   * @var string
+   */
+  const PAYMENT_DELETE = 'commerce_payment.commerce_payment.delete';
+
 }
diff --git a/modules/payment/tests/modules/payment_events_test/payment_events_test.info.yml b/modules/payment/tests/modules/payment_events_test/payment_events_test.info.yml
new file mode 100644
index 0000000000..179ebc0ca6
--- /dev/null
+++ b/modules/payment/tests/modules/payment_events_test/payment_events_test.info.yml
@@ -0,0 +1,4 @@
+name: 'Payment events test'
+type: module
+package: Testing
+core: 8.x
diff --git a/modules/payment/tests/modules/payment_events_test/payment_events_test.services.yml b/modules/payment/tests/modules/payment_events_test/payment_events_test.services.yml
new file mode 100644
index 0000000000..a7df3aa96c
--- /dev/null
+++ b/modules/payment/tests/modules/payment_events_test/payment_events_test.services.yml
@@ -0,0 +1,6 @@
+services:
+  payment_events_test.event_subscriber:
+    class: Drupal\payment_events_test\EventSubscriber
+    arguments: ['@state']
+    tags:
+      - { name: event_subscriber }
diff --git a/modules/payment/tests/modules/payment_events_test/src/EventSubscriber.php b/modules/payment/tests/modules/payment_events_test/src/EventSubscriber.php
new file mode 100644
index 0000000000..f748494531
--- /dev/null
+++ b/modules/payment/tests/modules/payment_events_test/src/EventSubscriber.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace Drupal\payment_events_test;
+
+use Drupal\commerce_payment\Event\PaymentEvent;
+use Drupal\commerce_payment\Event\PaymentEvents;
+use Drupal\Core\State\StateInterface;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+class EventSubscriber implements EventSubscriberInterface {
+
+  /**
+   * The state key value store.
+   *
+   * @var \Drupal\Core\State\StateInterface
+   */
+  protected $state;
+
+  /**
+   * Constructs the Event Subscriber object.
+   *
+   * @param \Drupal\Core\State\StateInterface $state
+   *   The state key value store.
+   */
+  public function __construct(StateInterface $state) {
+    $this->state = $state;
+  }
+
+  /**
+   * Reacts to payment event.
+   *
+   * @param \Drupal\commerce_payment\Event\PaymentEvent $event
+   *   The payment event.
+   * @param string $name
+   *   The name of the event.
+   */
+  public function paymentEvent(PaymentEvent $event, $name) {
+    $this->state->set('payment_events_test.event', [
+      'event_name' => $name,
+      'event_entity' => $event->getPayment(),
+    ]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    $events[PaymentEvents::PAYMENT_LOAD][] = ['paymentEvent'];
+    $events[PaymentEvents::PAYMENT_INSERT][] = ['paymentEvent'];
+    return $events;
+  }
+
+}
diff --git a/modules/payment/tests/src/Kernel/PaymentEventsTest.php b/modules/payment/tests/src/Kernel/PaymentEventsTest.php
new file mode 100644
index 0000000000..6069fb0336
--- /dev/null
+++ b/modules/payment/tests/src/Kernel/PaymentEventsTest.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace Drupal\Tests\commerce_payment\Kernel;
+
+use Drupal\commerce_order\Entity\OrderItemType;
+use Drupal\commerce_payment\Entity\Payment;
+use Drupal\commerce_payment\Entity\PaymentGateway;
+use Drupal\commerce_payment\Entity\PaymentMethod;
+use Drupal\Tests\commerce\Kernel\CommerceKernelTestBase;
+
+/**
+ * Tests the payment events.
+ *
+ * @group commerce
+ */
+class PaymentEventsTest extends CommerceKernelTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'address',
+    'entity_reference_revisions',
+    'profile',
+    'state_machine',
+    'commerce_product',
+    'commerce_order',
+    'commerce_payment',
+    'commerce_payment_example',
+    'payment_events_test',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->installEntitySchema('profile');
+    $this->installEntitySchema('commerce_order');
+    $this->installEntitySchema('commerce_order_item');
+    $this->installEntitySchema('commerce_payment');
+    $this->installEntitySchema('commerce_payment_method');
+    $this->installConfig('commerce_order');
+    $this->installConfig('commerce_payment');
+
+    // An order item type that doesn't need a purchasable entity, for simplicity.
+    OrderItemType::create([
+      'id' => 'test',
+      'label' => 'Test',
+      'orderType' => 'default',
+    ])->save();
+
+    $payment_gateway = PaymentGateway::create([
+      'id' => 'example',
+      'label' => 'Example',
+      'plugin' => 'example_onsite',
+    ]);
+    $payment_gateway->save();
+
+    $user = $this->createUser();
+
+    /** @var \Drupal\commerce_payment\Entity\PaymentMethodInterface $payment_method */
+    $payment_method_active = PaymentMethod::create([
+      'type' => 'credit_card',
+      'payment_gateway' => 'example',
+      // Thu, 16 Jan 2020.
+      'expires' => '1579132800',
+      'uid' => $user->id(),
+    ]);
+    $payment_method_active->save();
+  }
+
+  /**
+   * Tests the basic payment events.
+   */
+  public function testPaymentEvents() {
+    // Create a dummy payment.
+    $payment = Payment::create([
+      'payment_gateway' => 'example',
+      'payment_method' => 'credit_card',
+      'remote_id' => '123456',
+      'amount' => [
+        'number' => '39.99',
+        'currency_code' => 'USD',
+      ],
+      'state' => 'capture_completed',
+      'test' => TRUE,
+    ]);
+    $payment->save();
+
+    // Check the create event.
+    $event_recorder = \Drupal::state()->get('payment_events_test.event', FALSE);
+    $this->assertEquals('commerce_payment.commerce_payment.insert', $event_recorder['event_name']);
+    $this->assertEquals($payment->id(), $event_recorder['event_entity']->id());
+
+    // Reload the payment.
+    $this->reloadEntity($payment);
+
+    // Check the load event.
+    $event_recorder = \Drupal::state()->get('payment_events_test.event', FALSE);
+    $this->assertEquals('commerce_payment.commerce_payment.load', $event_recorder['event_name']);
+  }
+
+}