diff --git a/src/Entity/Activity.php b/src/Entity/Activity.php
index fc6d2b90..795a78ca 100644
--- a/src/Entity/Activity.php
+++ b/src/Entity/Activity.php
@@ -174,6 +174,12 @@ class Activity implements EntityWithMetaFields, EntityWithBudget
      * )
      */
     private $teams;
+    /**
+     * @var string|null
+     *
+     * @ORM\Column(name="invoice_text", type="text", nullable=true)
+     */
+    private $invoiceText;
 
     public function __construct()
     {
@@ -338,6 +344,16 @@ class Activity implements EntityWithMetaFields, EntityWithBudget
         return $this->teams;
     }
 
+    public function getInvoiceText(): ?string
+    {
+        return $this->invoiceText;
+    }
+
+    public function setInvoiceText(?string $invoiceText): void
+    {
+        $this->invoiceText = $invoiceText;
+    }
+
     /**
      * @return string
      */
diff --git a/src/Entity/Project.php b/src/Entity/Project.php
index bdd47b95..8a263b55 100644
--- a/src/Entity/Project.php
+++ b/src/Entity/Project.php
@@ -246,6 +246,12 @@ class Project implements EntityWithMetaFields, EntityWithBudget
      * )
      */
     private $teams;
+    /**
+     * @var string|null
+     *
+     * @ORM\Column(name="invoice_text", type="text", nullable=true)
+     */
+    private $invoiceText;
 
     public function __construct()
     {
@@ -520,6 +526,16 @@ class Project implements EntityWithMetaFields, EntityWithBudget
         return true;
     }
 
+    public function getInvoiceText(): ?string
+    {
+        return $this->invoiceText;
+    }
+
+    public function setInvoiceText(?string $invoiceText): void
+    {
+        $this->invoiceText = $invoiceText;
+    }
+
     /**
      * @return string
      */
diff --git a/src/Form/ActivityEditForm.php b/src/Form/ActivityEditForm.php
index 5d97cd06..d4d16bf4 100644
--- a/src/Form/ActivityEditForm.php
+++ b/src/Form/ActivityEditForm.php
@@ -60,6 +60,10 @@ class ActivityEditForm extends AbstractType
                 'label' => 'label.description',
                 'required' => false,
             ])
+            ->add('invoiceText', TextareaType::class, [
+                'label' => 'label.invoiceText',
+                'required' => false,
+            ])
         ;
 
         if ($new || !$isGlobal) {
diff --git a/src/Form/ProjectEditForm.php b/src/Form/ProjectEditForm.php
index 18a40685..602c2109 100644
--- a/src/Form/ProjectEditForm.php
+++ b/src/Form/ProjectEditForm.php
@@ -67,6 +67,10 @@ class ProjectEditForm extends AbstractType
                 'label' => 'label.description',
                 'required' => false,
             ])
+            ->add('invoiceText', TextareaType::class, [
+                'label' => 'label.invoiceText',
+                'required' => false,
+            ])
             ->add('orderNumber', TextType::class, [
                 'label' => 'label.orderNumber',
                 'required' => false,
diff --git a/src/Invoice/Calculator/ActivityInvoiceCalculator.php b/src/Invoice/Calculator/ActivityInvoiceCalculator.php
index 64d4f20a..8ebacbee 100644
--- a/src/Invoice/Calculator/ActivityInvoiceCalculator.php
+++ b/src/Invoice/Calculator/ActivityInvoiceCalculator.php
@@ -33,7 +33,11 @@ class ActivityInvoiceCalculator extends AbstractSumInvoiceCalculator implements
             return;
         }
 
-        $invoiceItem->setDescription($entry->getActivity()->getName());
+        if ($entry->getActivity()->getInvoiceText() !== null) {
+            $invoiceItem->setDescription($entry->getActivity()->getInvoiceText());
+        } else {
+            $invoiceItem->setDescription($entry->getActivity()->getName());
+        }
     }
 
     /**
diff --git a/src/Invoice/Calculator/ProjectInvoiceCalculator.php b/src/Invoice/Calculator/ProjectInvoiceCalculator.php
index 25285cd6..8b53afad 100644
--- a/src/Invoice/Calculator/ProjectInvoiceCalculator.php
+++ b/src/Invoice/Calculator/ProjectInvoiceCalculator.php
@@ -29,8 +29,11 @@ class ProjectInvoiceCalculator extends AbstractSumInvoiceCalculator implements C
 
     protected function mergeSumInvoiceItem(InvoiceItem $invoiceItem, InvoiceItemInterface $entry)
     {
-        $invoiceItem->setProject($entry->getProject());
-        $invoiceItem->setDescription($entry->getProject()->getName());
+        if ($entry->getProject()->getInvoiceText() !== null) {
+            $invoiceItem->setDescription($entry->getProject()->getInvoiceText());
+        } else {
+            $invoiceItem->setDescription($entry->getProject()->getName());
+        }
     }
 
     /**
diff --git a/src/Migrations/Version20220531145920.php b/src/Migrations/Version20220531145920.php
new file mode 100644
index 00000000..f708a357
--- /dev/null
+++ b/src/Migrations/Version20220531145920.php
@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * @version 1.20.2
+ */
+final class Version20220531145920 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add invoice text columns to project and activity';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $activities = $schema->getTable('kimai2_activities');
+        $activities->addColumn('invoice_text', 'text', ['notnull' => false, 'default' => null]);
+
+        $projects = $schema->getTable('kimai2_projects');
+        $projects->addColumn('invoice_text', 'text', ['notnull' => false, 'default' => null]);
+    }
+
+    public function down(Schema $schema): void
+    {
+        $activities = $schema->getTable('kimai2_activities');
+        $activities->dropColumn('invoice_text');
+
+        $projects = $schema->getTable('kimai2_projects');
+        $projects->dropColumn('invoice_text');
+    }
+}
diff --git a/templates/activity/edit.html.twig b/templates/activity/edit.html.twig
index 7ac2f0bd..f15bb27d 100644
--- a/templates/activity/edit.html.twig
+++ b/templates/activity/edit.html.twig
@@ -41,6 +41,9 @@
                 </div>
             </div>
             {% endif %}
+            {% if form.invoiceText is defined %}
+                {{ form_row(form.invoiceText) }}
+            {% endif %}
             <div class="row">
                 <div class="col-md-6">
                     {{ form_row(form.visible) }}
diff --git a/templates/project/edit.html.twig b/templates/project/edit.html.twig
index 2096d263..6a0d9af4 100644
--- a/templates/project/edit.html.twig
+++ b/templates/project/edit.html.twig
@@ -52,6 +52,9 @@
                 </div>
             </div>
             {% endif %}
+            {% if form.invoiceText is defined %}
+                {{ form_row(form.invoiceText) }}
+            {% endif %}
             <div class="row">
                 <div class="col-md-6">
                     {{ form_row(form.visible) }}
diff --git a/tests/Entity/ActivityTest.php b/tests/Entity/ActivityTest.php
index ca4a4d2a..cf613b9b 100644
--- a/tests/Entity/ActivityTest.php
+++ b/tests/Entity/ActivityTest.php
@@ -31,6 +31,7 @@ class ActivityTest extends AbstractEntityTest
         $this->assertNull($sut->getProject());
         $this->assertNull($sut->getName());
         $this->assertNull($sut->getComment());
+        $this->assertNull($sut->getInvoiceText());
         $this->assertTrue($sut->isVisible());
         $this->assertTrue($sut->isBillable());
         $this->assertTrue($sut->isGlobal());
@@ -66,6 +67,9 @@ class ActivityTest extends AbstractEntityTest
         $this->assertInstanceOf(Activity::class, $sut->setComment('hello world'));
         $this->assertEquals('hello world', $sut->getComment());
 
+        $sut->setInvoiceText('very long invoice text comment 12324');
+        self::assertEquals('very long invoice text comment 12324', $sut->getInvoiceText());
+
         self::assertFalse($sut->hasColor());
         $sut->setColor('#fffccc');
         $this->assertEquals('#fffccc', $sut->getColor());
diff --git a/tests/Entity/ProjectTest.php b/tests/Entity/ProjectTest.php
index 3e72515b..78a4bf05 100644
--- a/tests/Entity/ProjectTest.php
+++ b/tests/Entity/ProjectTest.php
@@ -35,6 +35,7 @@ class ProjectTest extends AbstractEntityTest
         self::assertNull($sut->getStart());
         self::assertNull($sut->getEnd());
         self::assertNull($sut->getComment());
+        self::assertNull($sut->getInvoiceText());
         self::assertTrue($sut->isVisible());
         self::assertTrue($sut->isBillable());
         self::assertNull($sut->getColor());
@@ -86,6 +87,9 @@ class ProjectTest extends AbstractEntityTest
         self::assertInstanceOf(Project::class, $sut->setComment('a comment'));
         self::assertEquals('a comment', $sut->getComment());
 
+        $sut->setInvoiceText('very long invoice text comment 12324');
+        self::assertEquals('very long invoice text comment 12324', $sut->getInvoiceText());
+
         self::assertFalse($sut->hasColor());
         $sut->setColor('#fffccc');
         self::assertEquals('#fffccc', $sut->getColor());
diff --git a/translations/messages.de.xlf b/translations/messages.de.xlf
index d6ff0250..74d5009f 100644
--- a/translations/messages.de.xlf
+++ b/translations/messages.de.xlf
@@ -293,6 +293,10 @@
         <source>label.description</source>
         <target>Beschreibung</target>
       </trans-unit>
+      <trans-unit id="74pEVx1" resname="label.invoiceText">
+        <source>label.invoiceText</source>
+        <target>Rechnungstext</target>
+      </trans-unit>
       <trans-unit id="ysOvPSq" resname="label.name">
         <source>label.name</source>
         <target>Name</target>
diff --git a/translations/messages.en.xlf b/translations/messages.en.xlf
index 6b8d9444..536af04f 100644
--- a/translations/messages.en.xlf
+++ b/translations/messages.en.xlf
@@ -293,6 +293,10 @@
         <source>label.description</source>
         <target>Description</target>
       </trans-unit>
+      <trans-unit id="74pEVx1" resname="label.invoiceText">
+        <source>label.invoiceText</source>
+        <target>Invoice text</target>
+      </trans-unit>
       <trans-unit id="ysOvPSq" resname="label.name">
         <source>label.name</source>
         <target>Name</target>