diff --git a/doc/tasks/phpcs.md b/doc/tasks/phpcs.md
index 3ffc2cf8..a2b4dc0c 100644
--- a/doc/tasks/phpcs.md
+++ b/doc/tasks/phpcs.md
@@ -31,6 +31,7 @@ grumphp:
             triggered_by: [php]
             exclude: []
             show_sniffs_error_path: true
+            parallel: null
 ```
 
 **standard**
@@ -136,6 +137,12 @@ A list of rules that should not be checked. Leave this option blank to run all c
 
 Displays the sniff that triggered the error, allowing you to more easily find the specific rules with their namespaces.
 
+**parallel**
+
+*Default: null*
+
+Determines the number of processes that phpcs / phpcbf will use when running. Defaults to a single process.
+
 ## Framework presets
 
 ### Symfony 2
diff --git a/src/Task/Phpcs.php b/src/Task/Phpcs.php
index c16320b3..8d3c1812 100644
--- a/src/Task/Phpcs.php
+++ b/src/Task/Phpcs.php
@@ -47,7 +47,8 @@ public static function getConfigurableOptions(): ConfigOptionsResolver
             'report' => 'full',
             'report_width' => null,
             'exclude' => [],
-            'show_sniffs_error_path' => true
+            'show_sniffs_error_path' => true,
+            'parallel' => null,
         ]);
 
         $resolver->addAllowedTypes('standard', ['array', 'null', 'string']);
@@ -64,6 +65,7 @@ public static function getConfigurableOptions(): ConfigOptionsResolver
         $resolver->addAllowedTypes('report_width', ['null', 'int']);
         $resolver->addAllowedTypes('exclude', ['array']);
         $resolver->addAllowedTypes('show_sniffs_error_path', ['bool']);
+        $resolver->addAllowedTypes('parallel', ['null', 'int']);
 
         return ConfigOptionsResolver::fromOptionsResolver($resolver);
     }
@@ -161,6 +163,7 @@ private function addArgumentsFromConfig(
         $arguments->addOptionalCommaSeparatedArgument('--ignore=%s', $config['ignore_patterns']);
         $arguments->addOptionalCommaSeparatedArgument('--exclude=%s', $config['exclude']);
         $arguments->addOptionalArgument('-s', $config['show_sniffs_error_path']);
+        $arguments->addOptionalArgument('--parallel=%s', $config['parallel']);
 
         return $arguments;
     }
diff --git a/test/Unit/Task/PhpcsTest.php b/test/Unit/Task/PhpcsTest.php
index 45c36cb1..b2e6b3f2 100644
--- a/test/Unit/Task/PhpcsTest.php
+++ b/test/Unit/Task/PhpcsTest.php
@@ -49,7 +49,8 @@ public function provideConfigurableOptions(): iterable
                 'report' => 'full',
                 'report_width' => null,
                 'exclude' => [],
-                'show_sniffs_error_path' => true
+                'show_sniffs_error_path' => true,
+                'parallel' => null,
             ]
         ];
     }
@@ -357,6 +358,21 @@ public function provideExternalTaskRuns(): iterable
                 $this->expectFileList('hello.php'.PHP_EOL.'hello2.php'),
             ]
         ];
+        yield 'parallel' => [
+            [
+              'parallel' => 4,
+            ],
+            $this->mockContext(RunContext::class, ['hello.php', 'hello2.php']),
+            'phpcs',
+            [
+                '--extensions=php',
+                '--report=full',
+                '-s',
+                '--parallel=4',
+                '--report-json',
+                $this->expectFileList('hello.php'.PHP_EOL.'hello2.php'),
+            ]
+        ];
     }
 
     private function expectFileList(string $expectedContents): callable