diff --git a/src/Analyser/NodeScopeResolver.php b/src/Analyser/NodeScopeResolver.php
index 2a4aa5f449..ea9b94acde 100644
--- a/src/Analyser/NodeScopeResolver.php
+++ b/src/Analyser/NodeScopeResolver.php
@@ -3619,6 +3619,14 @@ static function (): void {
 			$exprType = $scope->getType($expr->expr);
 			$toStringMethod = $scope->getMethodReflection($exprType, '__toString');
 			if ($toStringMethod !== null) {
+				if ($this->phpVersion->throwsOnStringCast()) {
+					if ($toStringMethod->getThrowType() !== null) {
+						$throwPoints[] = InternalThrowPoint::createExplicit($scope, $toStringMethod->getThrowType(), $expr, false);
+					} else {
+						$throwPoints[] = InternalThrowPoint::createImplicit($scope, $expr);
+					}
+				}
+
 				if (!$toStringMethod->hasSideEffects()->no()) {
 					$impurePoints[] = new ImpurePoint(
 						$scope,
diff --git a/src/Php/PhpVersion.php b/src/Php/PhpVersion.php
index 9657ab9818..1947cfdf05 100644
--- a/src/Php/PhpVersion.php
+++ b/src/Php/PhpVersion.php
@@ -479,4 +479,9 @@ public function deprecatesIncOnNonNumericString(): bool
 		return $this->versionId >= 80500;
 	}
 
+	public function throwsOnStringCast(): bool
+	{
+		return $this->versionId >= 70400;
+	}
+
 }
diff --git a/tests/PHPStan/Rules/Exceptions/CatchWithUnthrownExceptionRuleTest.php b/tests/PHPStan/Rules/Exceptions/CatchWithUnthrownExceptionRuleTest.php
index 272c010d97..f4e94b22a4 100644
--- a/tests/PHPStan/Rules/Exceptions/CatchWithUnthrownExceptionRuleTest.php
+++ b/tests/PHPStan/Rules/Exceptions/CatchWithUnthrownExceptionRuleTest.php
@@ -643,4 +643,14 @@ public function testPropertyHooks(): void
 		]);
 	}
 
+	public function testBug13806(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13806.php'], [
+			[
+				'Dead catch - InvalidArgumentException is never thrown in the try block.',
+				16,
+			],
+		]);
+	}
+
 }
diff --git a/tests/PHPStan/Rules/Exceptions/data/bug-13806.php b/tests/PHPStan/Rules/Exceptions/data/bug-13806.php
new file mode 100644
index 0000000000..ec9e021791
--- /dev/null
+++ b/tests/PHPStan/Rules/Exceptions/data/bug-13806.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Bug13806;
+
+function doFoo(MyString $myVariable, MyStringVoid $string, $mixed): void
+{
+	try {
+		(string) $myVariable;
+	} catch (\InvalidArgumentException $e) {
+		// Reported as dead catch, even though the `__toString()` method
+		// in `$myVariable` might throw an exception.
+	}
+
+	try {
+		(string) $string;
+	} catch (\InvalidArgumentException $e) {
+	}
+
+	try {
+		(string) $mixed;
+	} catch (\InvalidArgumentException $e) {
+	}
+}
+
+class MyString {
+	/** @throws \InvalidArgumentException */
+	public function __toString() {
+		throw new \InvalidArgumentException();
+	}
+}
+
+class MyStringVoid {
+	/** @throws void */
+	public function __toString()
+	{
+		throw new \InvalidArgumentException();
+	}
+}