diff --git a/src/Controller/InvoiceController.php b/src/Controller/InvoiceController.php
index fc5a4c57..9ecba3de 100644
--- a/src/Controller/InvoiceController.php
+++ b/src/Controller/InvoiceController.php
@@ -13,7 +13,10 @@ use App\Configuration\SystemConfiguration;
 use App\Entity\Customer;
 use App\Entity\Invoice;
 use App\Entity\InvoiceTemplate;
+use App\Entity\MetaTableTypeInterface;
 use App\Event\InvoiceDocumentsEvent;
+use App\Event\InvoiceMetaDefinitionEvent;
+use App\Event\InvoiceMetaDisplayEvent;
 use App\Export\Spreadsheet\AnnotatedObjectExporter;
 use App\Export\Spreadsheet\Writer\BinaryFileResponseWriter;
 use App\Export\Spreadsheet\Writer\XlsxWriter;
@@ -347,6 +350,7 @@ final class InvoiceController extends AbstractController
             'query' => $query,
             'toolbarForm' => $form->createView(),
             'download' => $invoice,
+            'metaColumns' => $this->findMetaColumns($query),
         ]);
     }
 
@@ -695,8 +699,23 @@ final class InvoiceController extends AbstractController
         ]);
     }
 
+    /**
+     * @param InvoiceArchiveQuery $query
+     * @return MetaTableTypeInterface[]
+     */
+    private function findMetaColumns(InvoiceArchiveQuery $query): array
+    {
+        $event = new InvoiceMetaDisplayEvent($query, InvoiceMetaDisplayEvent::INVOICE);
+        $this->dispatcher->dispatch($event);
+
+        return $event->getFields();
+    }
+
     private function createInvoiceEditForm(Invoice $invoice): FormInterface
     {
+        $event = new InvoiceMetaDefinitionEvent($invoice);
+        $this->dispatcher->dispatch($event);
+
         return $this->createForm(InvoiceEditForm::class, $invoice, [
             'action' => $this->generateUrl('admin_invoice_edit', ['id' => $invoice->getId()]),
             'method' => 'POST',
diff --git a/src/Entity/Invoice.php b/src/Entity/Invoice.php
index e890d91a..f63ce0df 100644
--- a/src/Entity/Invoice.php
+++ b/src/Entity/Invoice.php
@@ -11,6 +11,8 @@ namespace App\Entity;
 
 use App\Export\Annotation as Exporter;
 use App\Invoice\InvoiceModel;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use JMS\Serializer\Annotation as Serializer;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
@@ -34,7 +36,7 @@ use Symfony\Component\Validator\Constraints as Assert;
  * @Exporter\Expose("user", label="label.username", type="string", exp="object.getUser() === null ? null : object.getUser().getDisplayName()")
  * @Exporter\Expose("paymentDate", label="invoice.payment_date", type="date", exp="object.getPaymentDate() === null ? null : object.getPaymentDate()")
  */
-class Invoice
+class Invoice implements EntityWithMetaFields
 {
     public const STATUS_PENDING = 'pending';
     public const STATUS_PAID = 'paid';
@@ -49,7 +51,6 @@ class Invoice
      * @ORM\Column(name="id", type="integer")
      * @ORM\Id
      * @ORM\GeneratedValue(strategy="IDENTITY")
-     * @phpstan-ignore-next-line
      */
     private $id;
 
@@ -196,6 +197,28 @@ class Invoice
      */
     private $paymentDate;
 
+    /**
+     * Meta fields
+     *
+     * All visible meta (custom) fields registered with this invoice
+     *
+     * @var InvoiceMeta[]|Collection
+     *
+     * @Serializer\Expose()
+     * @Serializer\Groups({"Invoice"})
+     * @Serializer\Type(name="array<App\Entity\InvoiceMeta>")
+     * @Serializer\SerializedName("metaFields")
+     * @Serializer\Accessor(getter="getVisibleMetaFields")
+     *
+     * @ORM\OneToMany(targetEntity="App\Entity\InvoiceMeta", mappedBy="invoice", cascade={"persist"})
+     */
+    private $meta;
+
+    public function __construct()
+    {
+        $this->meta = new ArrayCollection();
+    }
+
     public function getId(): ?int
     {
         return $this->id;
@@ -399,4 +422,68 @@ class Invoice
     {
         return $this->comment;
     }
+
+    /**
+     * @return Collection|MetaTableTypeInterface[]
+     */
+    public function getMetaFields(): Collection
+    {
+        return $this->meta;
+    }
+
+    /**
+     * @return MetaTableTypeInterface[]
+     */
+    public function getVisibleMetaFields(): array
+    {
+        $all = [];
+        foreach ($this->meta as $meta) {
+            if ($meta->isVisible()) {
+                $all[] = $meta;
+            }
+        }
+
+        return $all;
+    }
+
+    public function getMetaField(string $name): ?MetaTableTypeInterface
+    {
+        foreach ($this->meta as $field) {
+            if (strtolower($field->getName()) === strtolower($name)) {
+                return $field;
+            }
+        }
+
+        return null;
+    }
+
+    public function setMetaField(MetaTableTypeInterface $meta): EntityWithMetaFields
+    {
+        if (null === ($current = $this->getMetaField($meta->getName()))) {
+            $meta->setEntity($this);
+            $this->meta->add($meta);
+
+            return $this;
+        }
+
+        $current->merge($meta);
+
+        return $this;
+    }
+
+    public function __clone()
+    {
+        if ($this->id) {
+            $this->id = null;
+        }
+
+        $currentMeta = $this->meta;
+        $this->meta = new ArrayCollection();
+        /** @var InvoiceMeta $meta */
+        foreach ($currentMeta as $meta) {
+            $newMeta = clone $meta;
+            $newMeta->setEntity($this);
+            $this->setMetaField($newMeta);
+        }
+    }
 }
diff --git a/src/Entity/InvoiceMeta.php b/src/Entity/InvoiceMeta.php
new file mode 100644
index 00000000..1e089cab
--- /dev/null
+++ b/src/Entity/InvoiceMeta.php
@@ -0,0 +1,59 @@
+<?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 App\Entity;
+
+use Doctrine\ORM\Mapping as ORM;
+use JMS\Serializer\Annotation as Serializer;
+use Symfony\Component\Validator\Constraints as Assert;
+
+/**
+ * @ORM\Entity()
+ * @ORM\Table(name="kimai2_invoices_meta",
+ *      uniqueConstraints={
+ *          @ORM\UniqueConstraint(columns={"invoice_id", "name"})
+ *      }
+ * )
+ * @Serializer\ExclusionPolicy("all")
+ */
+class InvoiceMeta implements MetaTableTypeInterface
+{
+    use MetaTableTypeTrait;
+
+    /**
+     * @var Invoice
+     *
+     * @ORM\ManyToOne(targetEntity="App\Entity\Invoice", inversedBy="meta")
+     * @ORM\JoinColumn(onDelete="CASCADE", nullable=false)
+     * @Assert\NotNull()
+     */
+    private $invoice;
+
+    public function setEntity(EntityWithMetaFields $entity): MetaTableTypeInterface
+    {
+        if (!($entity instanceof Invoice)) {
+            throw new \InvalidArgumentException(
+                sprintf('Expected instanceof Invoice, received "%s"', \get_class($entity))
+            );
+        }
+        $this->invoice = $entity;
+
+        return $this;
+    }
+
+    /**
+     * @return Invoice|null
+     */
+    public function getEntity(): ?EntityWithMetaFields
+    {
+        return $this->invoice;
+    }
+}
diff --git a/src/Event/InvoiceMetaDefinitionEvent.php b/src/Event/InvoiceMetaDefinitionEvent.php
new file mode 100644
index 00000000..9b668b0b
--- /dev/null
+++ b/src/Event/InvoiceMetaDefinitionEvent.php
@@ -0,0 +1,34 @@
+<?php
+
+/*
+ * 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 App\Event;
+
+use App\Entity\Invoice;
+use Symfony\Contracts\EventDispatcher\Event;
+
+/**
+ * This event can be used, to dynamically add meta fields to invoices
+ */
+final class InvoiceMetaDefinitionEvent extends Event
+{
+    /**
+     * @var Invoice
+     */
+    private $entity;
+
+    public function __construct(Invoice $entity)
+    {
+        $this->entity = $entity;
+    }
+
+    public function getEntity(): Invoice
+    {
+        return $this->entity;
+    }
+}
diff --git a/src/Event/InvoiceMetaDisplayEvent.php b/src/Event/InvoiceMetaDisplayEvent.php
new file mode 100644
index 00000000..971e3fe3
--- /dev/null
+++ b/src/Event/InvoiceMetaDisplayEvent.php
@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * 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 App\Event;
+
+use App\Repository\Query\InvoiceArchiveQuery;
+
+/**
+ * Dynamically find possible meta fields for an invoice-archive query.
+ *
+ * @method InvoiceArchiveQuery getQuery()
+ */
+final class InvoiceMetaDisplayEvent extends AbstractMetaDisplayEvent
+{
+    public const INVOICE = 'invoice';
+
+    public function __construct(InvoiceArchiveQuery $query, string $location)
+    {
+        parent::__construct($query, $location);
+    }
+}
diff --git a/src/Export/ExportItemInterface.php b/src/Export/ExportItemInterface.php
index a70177e4..68f5dbee 100644
--- a/src/Export/ExportItemInterface.php
+++ b/src/Export/ExportItemInterface.php
@@ -12,6 +12,9 @@ namespace App\Export;
 use App\Entity\MetaTableTypeInterface;
 use App\Invoice\InvoiceItemInterface;
 
+/**
+ * Will be merged with InvoiceItemInterface in 2.0
+ */
 interface ExportItemInterface extends InvoiceItemInterface
 {
     /**
diff --git a/src/Form/InvoiceEditForm.php b/src/Form/InvoiceEditForm.php
index 23bf28d0..7dd06031 100644
--- a/src/Form/InvoiceEditForm.php
+++ b/src/Form/InvoiceEditForm.php
@@ -11,6 +11,7 @@ namespace App\Form;
 
 use App\Entity\Invoice;
 use App\Form\Type\DatePickerType;
+use App\Form\Type\MetaFieldsCollectionType;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
 use Symfony\Component\Form\Extension\Core\Type\TextareaType;
@@ -48,6 +49,8 @@ class InvoiceEditForm extends AbstractType
                 'label' => 'invoice.payment_date',
                 'required' => false,
             ]));
+
+        $builder->add('metaFields', MetaFieldsCollectionType::class);
     }
 
     /**
diff --git a/src/Invoice/InvoiceItemWithAmountInterface.php b/src/Invoice/InvoiceItemWithAmountInterface.php
index 6c3f3115..d7520550 100644
--- a/src/Invoice/InvoiceItemWithAmountInterface.php
+++ b/src/Invoice/InvoiceItemWithAmountInterface.php
@@ -9,6 +9,9 @@
 
 namespace App\Invoice;
 
+/**
+ * Will be removed with 2.0, just here for BC compatibility.
+ */
 interface InvoiceItemWithAmountInterface
 {
     public function getAmount(): float;
diff --git a/src/Migrations/Version20220101204501.php b/src/Migrations/Version20220101204501.php
new file mode 100644
index 00000000..e96d0a69
--- /dev/null
+++ b/src/Migrations/Version20220101204501.php
@@ -0,0 +1,42 @@
+<?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 App\Doctrine\AbstractMigration;
+use Doctrine\DBAL\Schema\Schema;
+
+final class Version20220101204501 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Creates the invoice-meta table';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $table = $schema->createTable('kimai2_invoices_meta');
+        $table->addColumn('id', 'integer', ['autoincrement' => true, 'notnull' => true]);
+        $table->addColumn('invoice_id', 'integer', ['notnull' => true]);
+        $table->addColumn('name', 'string', ['notnull' => true, 'length' => 50]);
+        $table->addColumn('value', 'text', ['notnull' => false, 'length' => 65535]);
+        $table->addColumn('visible', 'boolean', ['notnull' => true, 'default' => false]);
+        $table->setPrimaryKey(['id']);
+        $table->addIndex(['invoice_id'], 'IDX_7EDC37D92989F1FD');
+        $table->addUniqueIndex(['invoice_id', 'name'], 'UNIQ_7EDC37D92989F1FD5E237E06');
+        $table->addForeignKeyConstraint('kimai2_invoices', ['invoice_id'], ['id'], ['onDelete' => 'CASCADE'], 'FK_7EDC37D92989F1FD');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $schema->dropTable('kimai2_invoices_meta');
+    }
+}
diff --git a/src/Repository/Loader/InvoiceIdLoader.php b/src/Repository/Loader/InvoiceIdLoader.php
index ec37a3b5..c2ea74d5 100644
--- a/src/Repository/Loader/InvoiceIdLoader.php
+++ b/src/Repository/Loader/InvoiceIdLoader.php
@@ -39,17 +39,25 @@ final class InvoiceIdLoader implements LoaderInterface
         $em = $this->entityManager;
 
         $qb = $em->createQueryBuilder();
-        $customer = $qb->select('PARTIAL i.{id}', 'customer')
+        $qb->select('PARTIAL i.{id}', 'customer')
             ->from(Invoice::class, 'i')
             ->leftJoin('i.customer', 'customer')
             ->getQuery()
             ->execute();
 
         $qb = $em->createQueryBuilder();
-        $user = $qb->select('PARTIAL i.{id}', 'user')
+        $qb->select('PARTIAL i.{id}', 'user')
             ->from(Invoice::class, 'i')
             ->leftJoin('i.user', 'user')
             ->getQuery()
             ->execute();
+
+        $qb = $em->createQueryBuilder();
+        $qb->select('PARTIAL i.{id}', 'meta')
+            ->from(Invoice::class, 'i')
+            ->leftJoin('i.meta', 'meta')
+            ->andWhere($qb->expr()->in('i.id', $ids))
+            ->getQuery()
+            ->execute();
     }
 }
diff --git a/templates/invoice/listing.html.twig b/templates/invoice/listing.html.twig
index ca62ae83..1f256c18 100644
--- a/templates/invoice/listing.html.twig
+++ b/templates/invoice/listing.html.twig
@@ -10,6 +10,13 @@
     'user': {'class': 'hidden-xs hidden-sm text-nowrap hidden', 'orderBy': false},
     'customer': {'class': 'hidden-xs hidden-sm text-nowrap', 'orderBy': false},
     'comment': {'class': 'hidden-xs hidden-sm', 'title': 'label.description'|trans},
+} %}
+{% for field in metaColumns %}
+    {% set columns = columns|merge({
+        ('mf_' ~ field.name): {'title': field.label|trans, 'class': 'hidden-xs hidden-sm', 'orderBy': false}
+    }) %}
+{% endfor %}
+{% set columns = columns|merge({
     'invoice_number': {'class': 'hidden-xs hidden-sm w-min', 'title': 'invoice.number'|trans, 'orderBy': false},
     'due_date': {'class': 'hidden-xs w-min', 'title': 'invoice.due_days'|trans, 'orderBy': false},
     'payment_date': {'class': 'hidden-xs hidden w-min', 'title': 'invoice.payment_date'|trans, 'orderBy': false},
@@ -18,7 +25,7 @@
     'tax': {'class': 'hidden-xs text-right w-min hidden', 'title': 'invoice.tax'|trans},
     'total_rate': {'class': 'hidden-xs text-right w-min'},
     'actions': {'class': 'actions alwaysVisible', 'orderBy': false},
-} %}
+}) %}
 
 {% set tableName = 'invoices' %}
 
@@ -42,6 +49,11 @@
                 <td class="{{ tables.data_table_column_class(tableName, columns, 'user') }}">{{ widgets.user_avatar(entry.user) }} {{ widgets.username(entry.user) }}</td>
                 <td class="{{ tables.data_table_column_class(tableName, columns, 'customer') }}">{{ widgets.label_customer(entry.customer) }}</td>
                 <td class="{{ tables.data_table_column_class(tableName, columns, 'comment') }}">{{ entry.comment }}</td>
+                {% for field in metaColumns %}
+                    <td class="{{ tables.data_table_column_class(tableName, columns, 'mf_' ~ field.name) }}">
+                        {{ tables.datatable_meta_column(entry, field) }}
+                    </td>
+                {% endfor %}
                 <td class="{{ tables.data_table_column_class(tableName, columns, 'invoice_number') }}">{{ widgets.label(entry.invoiceNumber, 'default') }}</td>
                 <td class="{{ tables.data_table_column_class(tableName, columns, 'due_date') }}">{{ macros.invoice_due_date(entry) }}</td>
                 <td class="{{ tables.data_table_column_class(tableName, columns, 'payment_date') }}">
diff --git a/tests/Controller/InvoiceControllerTest.php b/tests/Controller/InvoiceControllerTest.php
index 80af9070..daaabd9c 100644
--- a/tests/Controller/InvoiceControllerTest.php
+++ b/tests/Controller/InvoiceControllerTest.php
@@ -199,6 +199,7 @@ class InvoiceControllerTest extends ControllerBaseTest
         $this->assertIsRedirect($client);
         $this->assertRedirectUrl($client, '/invoice/show?id=', false);
         $client->followRedirect();
+        $this->assertTrue($client->getResponse()->isSuccessful());
         $this->assertDataTableRowCount($client, 'datatable_invoices', 1);
 
         $em = $this->getEntityManager();
diff --git a/tests/Entity/InvoiceMetaTest.php b/tests/Entity/InvoiceMetaTest.php
new file mode 100644
index 00000000..38f608c9
--- /dev/null
+++ b/tests/Entity/InvoiceMetaTest.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * 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 App\Tests\Entity;
+
+use App\Entity\Customer;
+use App\Entity\EntityWithMetaFields;
+use App\Entity\Invoice;
+use App\Entity\InvoiceMeta;
+use App\Entity\MetaTableTypeInterface;
+
+/**
+ * @covers \App\Entity\InvoiceMeta
+ */
+class InvoiceMetaTest extends AbstractMetaEntityTest
+{
+    protected function getEntity(): EntityWithMetaFields
+    {
+        return new Invoice();
+    }
+
+    protected function getMetaEntity(): MetaTableTypeInterface
+    {
+        return new InvoiceMeta();
+    }
+
+    public function testSetEntityThrowsException()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage('Expected instanceof Invoice, received "App\Entity\Customer"');
+
+        $sut = new InvoiceMeta();
+        $sut->setEntity(new Customer());
+    }
+}
diff --git a/tests/Entity/InvoiceTest.php b/tests/Entity/InvoiceTest.php
index 07ec2d08..8f105aea 100644
--- a/tests/Entity/InvoiceTest.php
+++ b/tests/Entity/InvoiceTest.php
@@ -14,6 +14,7 @@ use App\Entity\ActivityMeta;
 use App\Entity\Customer;
 use App\Entity\CustomerMeta;
 use App\Entity\Invoice;
+use App\Entity\InvoiceMeta;
 use App\Entity\InvoiceTemplate;
 use App\Entity\Project;
 use App\Entity\ProjectMeta;
@@ -221,4 +222,54 @@ class InvoiceTest extends TestCase
 
         return new DateNumberGenerator($repository);
     }
+
+    public function testClone()
+    {
+        $sut = new Invoice();
+        $sut->setComment('foo kajsdhgf aksjdhfg');
+        $sut->setFilename('1234567890');
+
+        $meta = new InvoiceMeta();
+        $meta->setName('blabla');
+        $meta->setValue('1234567890');
+        $meta->setIsVisible(false);
+        $meta->setIsRequired(true);
+        $sut->setMetaField($meta);
+
+        $clone = clone $sut;
+
+        foreach ($sut->getMetaFields() as $metaField) {
+            $cloneMeta = $clone->getMetaField($metaField->getName());
+            self::assertEquals($cloneMeta->getValue(), $metaField->getValue());
+        }
+        self::assertEquals('1234567890', $clone->getInvoiceFilename());
+        self::assertEquals('foo kajsdhgf aksjdhfg', $clone->getComment());
+    }
+
+    public function testMetaFields()
+    {
+        $sut = new Invoice();
+        $meta = new InvoiceMeta();
+        $meta->setName('foo')->setValue('bar')->setType('test');
+        self::assertInstanceOf(Invoice::class, $sut->setMetaField($meta));
+        self::assertEquals(1, $sut->getMetaFields()->count());
+        $result = $sut->getMetaField('foo');
+        self::assertSame($result, $meta);
+        self::assertEquals('test', $result->getType());
+
+        $meta2 = new InvoiceMeta();
+        $meta2->setName('foo')->setValue('bar')->setType('test2');
+        self::assertInstanceOf(Invoice::class, $sut->setMetaField($meta2));
+        self::assertEquals(1, $sut->getMetaFields()->count());
+        self::assertCount(0, $sut->getVisibleMetaFields());
+
+        $result = $sut->getMetaField('foo');
+        self::assertSame($result, $meta);
+        self::assertEquals('test2', $result->getType());
+
+        $sut->setMetaField((new InvoiceMeta())->setName('blub')->setIsVisible(true));
+        $sut->setMetaField((new InvoiceMeta())->setName('blab')->setIsVisible(true));
+        self::assertEquals(3, $sut->getMetaFields()->count());
+        self::assertCount(2, $sut->getVisibleMetaFields());
+    }
 }
diff --git a/tests/Repository/Loader/InvoiceLoaderTest.php b/tests/Repository/Loader/InvoiceLoaderTest.php
index a1a6296c..da4cd2f2 100644
--- a/tests/Repository/Loader/InvoiceLoaderTest.php
+++ b/tests/Repository/Loader/InvoiceLoaderTest.php
@@ -20,7 +20,7 @@ class InvoiceLoaderTest extends AbstractLoaderTest
 {
     public function testLoadResults()
     {
-        $em = $this->getEntityManagerMock(2);
+        $em = $this->getEntityManagerMock(3);
 
         $sut = new InvoiceLoader($em);