diff --git a/src/Generator/GenerateTypecast.php b/src/Generator/GenerateTypecast.php
index b532048..ab35e94 100644
--- a/src/Generator/GenerateTypecast.php
+++ b/src/Generator/GenerateTypecast.php
@@ -4,10 +4,10 @@
 
 namespace Cycle\Schema\Generator;
 
+use Cycle\Database\Schema\AbstractColumn;
 use Cycle\Schema\Definition\Entity;
 use Cycle\Schema\GeneratorInterface;
 use Cycle\Schema\Registry;
-use Cycle\Database\Schema\AbstractColumn;
 
 /**
  * Must be run after RenderTable.
@@ -22,19 +22,66 @@ final class GenerateTypecast implements GeneratorInterface
     public function run(Registry $registry): Registry
     {
         foreach ($registry as $entity) {
-            $this->compute($registry, $entity);
+            $this->computeByClassPropertyType($entity);
+            $this->computeByFieldType($entity);
+            $this->computeByColumn($registry, $entity);
         }
 
         return $registry;
     }
 
+    private function computeByClassPropertyType(Entity $entity): void
+    {
+        $refClass = new \ReflectionClass($entity->getClass());
+        foreach ($entity->getFields() as $field) {
+            if ($field->hasTypecast()) {
+                continue;
+            }
+            if (!$refClass->hasProperty($field->getColumn())) {
+                continue;
+            }
+
+            $refProp = $refClass->getProperty($field->getColumn());
+            if (!$refProp->hasType() || !$refProp->getType()->isBuiltin()) {
+                continue;
+            }
+
+            $field->setTypecast(
+                match ($refProp->getType()->getName()) {
+                    'bool' => 'bool',
+                    'int' => 'int',
+                    'string' => 'string',
+                    default => null
+                }
+            );
+        }
+    }
+
+    private function computeByFieldType(Entity $entity): void
+    {
+        foreach ($entity->getFields() as $field) {
+            if ($field->hasTypecast()) {
+                continue;
+            }
+
+            $field->setTypecast(
+                match ($field->getType()) {
+                    'bool', 'boolean' => 'bool',
+                    'int', 'integer' => 'int',
+                    'string' => 'string',
+                    default => null
+                }
+            );
+        }
+    }
+
     /**
      * Automatically clarify column types based on table column types.
      *
      * @param Registry $registry
      * @param Entity   $entity
      */
-    protected function compute(Registry $registry, Entity $entity): void
+    protected function computeByColumn(Registry $registry, Entity $entity): void
     {
         if (!$registry->hasTable($entity)) {
             return;
diff --git a/tests/Schema/Fixtures/EntityForTypecast.php b/tests/Schema/Fixtures/EntityForTypecast.php
new file mode 100644
index 0000000..2b14e8a
--- /dev/null
+++ b/tests/Schema/Fixtures/EntityForTypecast.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\Schema\Tests\Fixtures;
+
+class EntityForTypecast
+{
+    public $id;
+
+    public int $int_integer;
+
+    public int $int_tinyInteger;
+
+    public int $int_bigInteger;
+
+    public bool $bool_boolean;
+
+    public string $string_string;
+
+    public $_integer;
+
+    public $_boolean;
+
+    public $_string;
+
+    public int $int_boolean;
+    public int $int_string;
+
+    public bool $bool_integer;
+    public bool $bool_string;
+
+    public string $string_boolean;
+    public string $string_integer;
+}
diff --git a/tests/Schema/Generator/BoolTypecastGeneratorTest.php b/tests/Schema/Generator/BoolTypecastGeneratorTest.php
new file mode 100644
index 0000000..5302e5e
--- /dev/null
+++ b/tests/Schema/Generator/BoolTypecastGeneratorTest.php
@@ -0,0 +1,51 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\Schema\Tests\Generator;
+
+use Cycle\Schema\Definition\Field;
+use Cycle\Schema\Generator\BoolTypecastGenerator;
+use Cycle\Schema\Registry;
+use PHPUnit\Framework\TestCase;
+
+class BoolTypecastGeneratorTest extends TestCase
+{
+    /**
+     * @depends dataSetTypecast
+     */
+    public function testSetTypecast(Field $field, ?string $expectedTypecast)
+    {
+        $registry = $this->createMock(Registry::class);
+        $registry
+            ->expects(self::atLeastOnce())
+            ->method('getFields')
+            ->willReturn($field);
+        $generator = new BoolTypecastGenerator();
+        $generator->run($registry);
+        self::assertSame($expectedTypecast, $field->getTypecast());
+    }
+
+    public function dataSetTypecast(): iterable
+    {
+        yield [
+            (new Field())->setType('boolean'),
+            'bool',
+        ];
+
+        yield [
+            (new Field())->setType('boolean')->setTypecast('foo'),
+            'foo',
+        ];
+
+        yield [
+            (new Field())->setType('bool'),
+            null,
+        ];
+
+        yield [
+            (new Field())->setType('int'),
+            null,
+        ];
+    }
+}
diff --git a/tests/Schema/Generator/TypecastGeneratorTest.php b/tests/Schema/Generator/TypecastGeneratorTest.php
index 1c49bc4..2368ce9 100644
--- a/tests/Schema/Generator/TypecastGeneratorTest.php
+++ b/tests/Schema/Generator/TypecastGeneratorTest.php
@@ -6,6 +6,8 @@
 
 use Cycle\ORM\Schema;
 use Cycle\Schema\Compiler;
+use Cycle\Schema\Definition\Entity;
+use Cycle\Schema\Definition\Field;
 use Cycle\Schema\Generator\GenerateTypecast;
 use Cycle\Schema\Generator\RenderTables;
 use Cycle\Schema\Registry;
@@ -24,11 +26,104 @@ public function testCompiledUser(): void
         $c = new Compiler();
         $schema = $c->compile($r, [new RenderTables(), new GenerateTypecast()]);
 
-
         $this->assertSame('int', $schema['user'][Schema::TYPECAST]['p_id']);
         $this->assertSame('float', $schema['user'][Schema::TYPECAST]['p_balance']);
         $this->assertSame('datetime', $schema['user'][Schema::TYPECAST]['p_created_at']);
 
         $this->assertTrue(in_array($schema['user'][Schema::TYPECAST]['p_id'], ['int', 'bool']));
     }
+
+    /**
+     * @dataProvider dataTypecast
+     */
+    public function testTypecast(Field $field, ?string $expectedTypecast): void
+    {
+        $entity = new Entity();
+        $entity->setRole('entityForTypecast');
+        $entity->setClass(\Cycle\Schema\Tests\Fixtures\EntityForTypecast::class);
+        $entity->getFields()->set($field->getColumn(), $field);
+
+        $r = new Registry($this->dbal);
+        $r->register($entity)->linkTable($entity, 'default', 'entityForTypecast');
+
+        $c = new Compiler();
+        $c->compile($r, [new RenderTables(), new GenerateTypecast()]);
+        self::assertSame($expectedTypecast, $field->getTypecast());
+    }
+
+    public function dataTypecast(): iterable
+    {
+        // based on property type
+        yield 'int_integer' => [
+            (new Field())->setType('integer')->setColumn('int_integer'),
+            'int',
+        ];
+
+        yield 'int_tinyInteger' => [
+            (new Field())->setType('tinyInteger')->setColumn('int_tinyInteger'),
+            'int',
+        ];
+
+        yield 'int_bigInteger' => [
+            (new Field())->setType('bigInteger')->setColumn('int_bigInteger'),
+            'int',
+        ];
+
+        yield 'bool_boolean' => [
+            (new Field())->setType('boolean')->setColumn('bool_boolean'),
+            'bool',
+        ];
+
+        yield 'string_string' => [
+            (new Field())->setType('string')->setColumn('string_string'),
+            'string',
+        ];
+
+        // based on orm type
+        yield '_integer' => [
+            (new Field())->setType('integer')->setColumn('_integer'),
+            'int',
+        ];
+
+        yield '_boolean' => [
+            (new Field())->setType('boolean')->setColumn('_boolean'),
+            'bool',
+        ];
+
+        yield '_string' => [
+            (new Field())->setType('string')->setColumn('_string'),
+            'string',
+        ];
+
+        // based on property type
+        yield 'int_boolean' => [
+            (new Field())->setType('boolean')->setColumn('int_boolean'),
+            'int',
+        ];
+
+        yield 'int_string' => [
+            (new Field())->setType('string')->setColumn('int_string'),
+            'int',
+        ];
+
+        yield 'bool_integer' => [
+            (new Field())->setType('integer')->setColumn('bool_integer'),
+            'bool',
+        ];
+
+        yield 'bool_string' => [
+            (new Field())->setType('string')->setColumn('bool_string'),
+            'bool',
+        ];
+
+        yield 'string_boolean' => [
+            (new Field())->setType('boolean')->setColumn('string_boolean'),
+            'string',
+        ];
+
+        yield 'string_integer' => [
+            (new Field())->setType('integer')->setColumn('string_integer'),
+            'string',
+        ];
+    }
 }