diff --git a/src/Campaigns/Models/Campaign.php b/src/Campaigns/Models/Campaign.php
index bb56e5477b..d504d95930 100644
--- a/src/Campaigns/Models/Campaign.php
+++ b/src/Campaigns/Models/Campaign.php
@@ -158,6 +158,16 @@ public function delete(): bool
         return give(CampaignRepository::class)->delete($this);
     }
 
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function merge(Campaign ...$campaignsToMerge): bool
+    {
+        return give(CampaignRepository::class)->mergeCampaigns($this, ...$campaignsToMerge);
+    }
+
     /**
      * @unreleased
      *
diff --git a/src/Campaigns/Repositories/CampaignRepository.php b/src/Campaigns/Repositories/CampaignRepository.php
index ff8cbba68e..96db261118 100644
--- a/src/Campaigns/Repositories/CampaignRepository.php
+++ b/src/Campaigns/Repositories/CampaignRepository.php
@@ -262,6 +262,63 @@ public function delete(Campaign $campaign): bool
         return true;
     }
 
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function mergeCampaigns(Campaign $destinationCampaign, Campaign ...$campaignsToMerge): bool
+    {
+        // Make sure the destination campaign ID will not be included into $campaignsToMergeIds
+        $campaignsToMergeIds = array_column($campaignsToMerge, 'id');
+        if ($key = array_search($destinationCampaign->id, $campaignsToMergeIds)) {
+            unset($campaignsToMergeIds[$key]);
+        }
+
+        Hooks::doAction('givewp_campaigns_merging', $destinationCampaign, $campaignsToMergeIds);
+
+        DB::query('START TRANSACTION');
+
+        try {
+            // Convert $campaignsToMergeIds to string to use it in the queries
+            $campaignsToMergeIdsString = implode(', ', $campaignsToMergeIds);
+
+            // Migrate revenue entries from campaigns to merge to the destination campaign
+            DB::query(
+                DB::prepare("UPDATE " . DB::prefix('give_revenue') . " SET campaign_id = %d WHERE campaign_id IN ($campaignsToMergeIdsString)",
+                    [
+                        $destinationCampaign->id,
+                    ])
+            );
+
+            // Migrate forms from campaigns to merge to the destination campaign
+            DB::query(
+                DB::prepare("UPDATE " . DB::prefix('give_campaign_forms') . " SET is_default = 0, campaign_id = %d WHERE campaign_id IN ($campaignsToMergeIdsString)",
+                    [
+                        $destinationCampaign->id,
+                    ])
+            );
+
+            // Delete campaigns to merge now that we already migrated the necessary data to the destination campaign
+            DB::query("DELETE FROM " . DB::prefix('give_campaigns') . " WHERE id IN ($campaignsToMergeIdsString)");
+        } catch (Exception $exception) {
+            DB::query('ROLLBACK');
+
+            Log::error('Failed merging campaigns into destination campaign', [
+                'campaignsToMergeIds' => $campaignsToMergeIds,
+                'destinationCampaign' => compact('destinationCampaign'),
+            ]);
+
+            throw new $exception('Failed merging campaigns into destination campaign');
+        }
+
+        DB::query('COMMIT');
+
+        Hooks::doAction('givewp_campaigns_merged', $destinationCampaign, $campaignsToMergeIds);
+
+        return true;
+    }
+
     /**
      * @unreleased
      */
diff --git a/src/Campaigns/Routes/MergeCampaigns.php b/src/Campaigns/Routes/MergeCampaigns.php
new file mode 100644
index 0000000000..1999fa3638
--- /dev/null
+++ b/src/Campaigns/Routes/MergeCampaigns.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Give\Campaigns\Routes;
+
+use Exception;
+use Give\API\RestRoute;
+use Give\Campaigns\Models\Campaign;
+use Give\Campaigns\ValueObjects\CampaignRoute;
+use WP_REST_Request;
+use WP_REST_Response;
+use WP_REST_Server;
+
+/**
+ * @unreleased
+ */
+class MergeCampaigns implements RestRoute
+{
+    /**
+     * @unreleased
+     */
+    public function registerRoute()
+    {
+        register_rest_route(
+            CampaignRoute::NAMESPACE,
+            CampaignRoute::CAMPAIGN . '/merge',
+            [
+                [
+                    'methods' => WP_REST_Server::EDITABLE,
+                    'callback' => [$this, 'handleRequest'],
+                    'permission_callback' => function () {
+                        return current_user_can('manage_options');
+                    },
+                ],
+                'args' => [
+                    'id' => [
+                        'type' => 'integer',
+                        'required' => true,
+                    ],
+                    'campaignsToMergeIds' => [
+                        'type' => 'array',
+                        'required' => true,
+                        'items' => [
+                            'type' => 'integer',
+                        ],
+                    ],
+                ],
+            ]
+        );
+    }
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function handleRequest(WP_REST_Request $request): WP_REST_Response
+    {
+        $destinationCampaign = Campaign::find($request->get_param('id'));
+        $campaignsToMerge = Campaign::query()->whereIn('id', $request->get_param('campaignsToMergeIds'))->getAll();
+
+        $campaignsMerged = $destinationCampaign->merge(...$campaignsToMerge);
+
+        return new WP_REST_Response($campaignsMerged);
+    }
+}
diff --git a/src/Campaigns/ServiceProvider.php b/src/Campaigns/ServiceProvider.php
index e46e6baa92..bcbc832dd1 100644
--- a/src/Campaigns/ServiceProvider.php
+++ b/src/Campaigns/ServiceProvider.php
@@ -56,6 +56,7 @@ private function registerRoutes()
         Hooks::addAction('rest_api_init', Routes\GetCampaignsListTable::class, 'registerRoute');
         Hooks::addAction('rest_api_init', Routes\DeleteCampaignListTable::class, 'registerRoute');
         Hooks::addAction('rest_api_init', Routes\GetCampaignStatistics::class, 'registerRoute');
+        Hooks::addAction('rest_api_init', Routes\MergeCampaigns::class, 'registerRoute');
     }
 
     /**
@@ -138,7 +139,7 @@ private function setupCampaignForms()
         if ( ! defined('GIVE_IS_ALL_STATS_COLUMNS_ASYNC_ON_ADMIN_FORM_LIST_VIEWS')) {
             define('GIVE_IS_ALL_STATS_COLUMNS_ASYNC_ON_ADMIN_FORM_LIST_VIEWS', false);
         }
-        
+
         Hooks::addAction('save_post_give_forms', AddCampaignFormFromRequest::class, 'optionBasedFormEditor', 10, 3);
         Hooks::addAction('givewp_donation_form_created', AddCampaignFormFromRequest::class, 'visualFormBuilder');
         Hooks::addAction('givewp_campaign_created', CreateDefaultCampaignForm::class);
diff --git a/src/Campaigns/resources/admin/components/CampaignFormModal/index.tsx b/src/Campaigns/resources/admin/components/CampaignFormModal/index.tsx
index 5159559cdf..5b4028e4b9 100644
--- a/src/Campaigns/resources/admin/components/CampaignFormModal/index.tsx
+++ b/src/Campaigns/resources/admin/components/CampaignFormModal/index.tsx
@@ -9,7 +9,7 @@ import {
     GoalInputAttributes,
     GoalTypeOption as GoalTypeOptionType,
 } from './types';
-import {useEffect, useRef, useState} from 'react';
+import {useRef, useState} from 'react';
 import {Currency, Upload} from '../Inputs';
 import {
     AmountFromSubscriptionsIcon,
@@ -146,7 +146,7 @@ export default function CampaignFormModal({isOpen, handleClose, apiSettings, tit
     const goal = watch('goal');
 
     const getFormModalTitle = () => {
-        switch(step) {
+        switch (step) {
             case 1:
                 return __('Tell us about your fundraising cause', 'give');
             case 2:
@@ -154,7 +154,7 @@ export default function CampaignFormModal({isOpen, handleClose, apiSettings, tit
         }
 
         return null;
-    }
+    };
 
     const goalInputAttributes: {[selectedGoalType: string]: GoalInputAttributes} = {
         amount: {
@@ -395,7 +395,7 @@ export default function CampaignFormModal({isOpen, handleClose, apiSettings, tit
                                 ) : (
                                     <input
                                         type="number"
-                                        {...register('goal', {required: __('The campaign must have a goal!', 'give')})}
+                                        {...register('goal', {valueAsNumber: true})}
                                         aria-invalid={errors.goal ? 'true' : 'false'}
                                         placeholder={goalInputAttributes[selectedGoalType].placeholder}
                                     />
diff --git a/src/FormMigration/Controllers/MigrationController.php b/src/FormMigration/Controllers/MigrationController.php
index 1fc45cf3ac..5fa685ddd9 100644
--- a/src/FormMigration/Controllers/MigrationController.php
+++ b/src/FormMigration/Controllers/MigrationController.php
@@ -2,6 +2,7 @@
 
 namespace Give\FormMigration\Controllers;
 
+use Give\Campaigns\Repositories\CampaignRepository;
 use Give\DonationForms\V2\Models\DonationForm;
 use Give\FormMigration\Concerns\Blocks\BlockDifference;
 use Give\FormMigration\DataTransferObjects\FormMigrationPayload;
@@ -50,6 +51,12 @@ public function __invoke(DonationForm $formV2)
             ->process($payload)
             ->finally(function(FormMigrationPayload $payload) {
                 $payload->formV3->save();
+
+                // Associate upgraded form to a campaign
+                $campaignRepository = give(CampaignRepository::class);
+                $campaign = $campaignRepository->getByFormId($payload->formV2->id);
+                $campaignRepository->addCampaignForm($campaign, $payload->formV3->id);
+
                 Log::info(esc_html__('Form migrated from v2 to v3.', 'give'), $this->debugContext);
             });
 
diff --git a/src/FormMigration/Controllers/TransferController.php b/src/FormMigration/Controllers/TransferController.php
index cccc2f32df..4810eb050d 100644
--- a/src/FormMigration/Controllers/TransferController.php
+++ b/src/FormMigration/Controllers/TransferController.php
@@ -2,6 +2,7 @@
 
 namespace Give\FormMigration\Controllers;
 
+use Give\Campaigns\Repositories\CampaignRepository;
 use Give\DonationForms\V2\Models\DonationForm;
 use Give\DonationForms\ValueObjects\DonationFormStatus;
 use Give\FormMigration\Actions\GetMigratedFormId;
@@ -35,6 +36,15 @@ public function __invoke(DonationForm $formV2, TransferOptions $options)
             TransferFormUrl::from($formV2->id)->to($v3FormId);
             TransferDonations::from($formV2->id)->to($v3FormId);
 
+            // Promote upgraded form to default form
+            $campaignRepository = give(CampaignRepository::class);
+            $campaign = $campaignRepository->getByFormId($formV2->id);
+            $defaultForm = $campaign->defaultForm();
+
+            if ($defaultForm->id === $formV2->id) {
+                $campaignRepository->updateDefaultCampaignForm($campaign, $v3FormId);
+            }
+
             if($options->shouldDelete()) {
                 wp_trash_post($formV2->id);
             }
diff --git a/tests/Feature/FormMigration/Controllers/TestMigrationController.php b/tests/Feature/FormMigration/Controllers/TestMigrationController.php
index a2f628632e..74d10d575c 100644
--- a/tests/Feature/FormMigration/Controllers/TestMigrationController.php
+++ b/tests/Feature/FormMigration/Controllers/TestMigrationController.php
@@ -28,6 +28,8 @@ public function testShouldMigrateFormV2ToV3(): void
     {
         $formV2 = $this->createSimpleDonationForm();
 
+        $this->createCampaignForDonationForm($formV2->id);
+
         $request = $this->getMockRequest(WP_REST_Server::CREATABLE);
 
         $controller = new MigrationController($request);
diff --git a/tests/Unit/Campaigns/Repositories/CampaignRepositoryTest.php b/tests/Unit/Campaigns/Repositories/CampaignRepositoryTest.php
index 4604c83316..ea8c39207a 100644
--- a/tests/Unit/Campaigns/Repositories/CampaignRepositoryTest.php
+++ b/tests/Unit/Campaigns/Repositories/CampaignRepositoryTest.php
@@ -8,6 +8,8 @@
 use Give\Campaigns\ValueObjects\CampaignStatus;
 use Give\Campaigns\ValueObjects\CampaignType;
 use Give\DonationForms\Models\DonationForm;
+use Give\Donations\Models\Donation;
+use Give\Framework\Database\DB;
 use Give\Framework\Exceptions\Primitives\InvalidArgumentException;
 use Give\Framework\Support\Facades\DateTime\Temporal;
 use Give\Tests\TestCase;
@@ -282,8 +284,154 @@ public function testUpdateCampaignFormShouldUpdateDefaultFormToCampaign()
         $repository->updateDefaultCampaignForm($campaign, $form2->id);
 
         //Re-fetch
-        $campaign = $campaign::find($campaign->id);
+        $campaign = Campaign::find($campaign->id);
 
         $this->assertEquals($form2->id, $campaign->defaultForm()->id);
     }
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsShouldReturnTrue()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        $repository = new CampaignRepository();
+        $merged = $repository->mergeCampaigns($destinationCampaign, $campaign1, $campaign2);
+
+        $this->assertTrue($merged);
+    }
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsShouldMigrateFormsToDestinationCampaign()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        $formCampaign1 = $campaign1->defaultForm();
+        $formCampaign2 = $campaign2->defaultForm();
+
+        $repository = new CampaignRepository();
+        $repository->mergeCampaigns($destinationCampaign, $campaign1, $campaign2);
+
+        //Re-fetch
+        $destinationCampaign = Campaign::find($destinationCampaign->id);
+
+        $campaignReturn = $repository->getByFormId($formCampaign1->id);
+        $this->assertEquals($campaignReturn->getAttributes(), $destinationCampaign->getAttributes());
+
+        $campaignReturn = $repository->getByFormId($formCampaign2->id);
+        $this->assertEquals($campaignReturn->getAttributes(), $destinationCampaign->getAttributes());
+    }
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsShouldMigrateRevenueToDestinationCampaign()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        /** @var Donation $donationCampaign1 */
+        $donationCampaign1 = Donation::factory()->create(['formId' => $campaign1->defaultForm()->id]);
+        /** @var Donation $donationCampaign2 */
+        $donationCampaign2 = Donation::factory()->create(['formId' => $campaign2->defaultForm()->id]);
+
+        // TODO Remove this updates clauses when the logic to automatically set the campaign_id in the revenue table entries for new donations is implemented
+        DB::query(
+            DB::prepare('UPDATE ' . DB::prefix('give_revenue') . ' SET campaign_id = %d WHERE donation_id = %d',
+                [
+                    $campaign1->id,
+                    $donationCampaign1->id,
+                ])
+        );
+        DB::query(
+            DB::prepare('UPDATE ' . DB::prefix('give_revenue') . ' SET campaign_id = %d WHERE donation_id = %d',
+                [
+                    $campaign2->id,
+                    $donationCampaign2->id,
+                ])
+        );
+
+        $repository = new CampaignRepository();
+        $repository->mergeCampaigns($destinationCampaign, $campaign1, $campaign2);
+
+        $revenueEntry = DB::table('give_revenue')->where('donation_id', $donationCampaign1->id)->get();
+        $this->assertEquals($destinationCampaign->id, $revenueEntry->campaign_id);
+
+        $revenueEntry = DB::table('give_revenue')->where('donation_id', $donationCampaign2->id)->get();
+        $this->assertEquals($destinationCampaign->id, $revenueEntry->campaign_id);
+    }
+
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsShouldDeleteMergedCampaigns()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        $repository = new CampaignRepository();
+        $repository->mergeCampaigns($destinationCampaign, $campaign1, $campaign2);
+
+        $this->assertNull(Campaign::find($campaign1->id));
+        $this->assertNull(Campaign::find($campaign2->id));
+    }
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsShouldKeepDefaultFormFromDestinationCampaign()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        $defaultFormBeforeMerge = $destinationCampaign->defaultForm();
+
+        $repository = new CampaignRepository();
+        $repository->mergeCampaigns($destinationCampaign, $campaign1, $campaign2);
+
+        //Re-fetch
+        $destinationCampaign = Campaign::find($destinationCampaign->id);
+
+        $countDefaultForm = $destinationCampaign->forms()
+            ->where('campaign_forms.is_default', true)->count();
+
+        $this->assertEquals(1, $countDefaultForm);
+        $this->assertEquals($defaultFormBeforeMerge->id, $destinationCampaign->defaultForm()->id);
+    }
 }
diff --git a/tests/Unit/Campaigns/Routes/MergeCampaignsTest.php b/tests/Unit/Campaigns/Routes/MergeCampaignsTest.php
new file mode 100644
index 0000000000..4da13b0c44
--- /dev/null
+++ b/tests/Unit/Campaigns/Routes/MergeCampaignsTest.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Unit\Campaigns\Routes;
+
+use Exception;
+use Give\Campaigns\Models\Campaign;
+use Give\Tests\RestApiTestCase;
+use WP_REST_Request;
+
+/**
+ * @unreleased
+ */
+class MergeCampaignsTest extends RestApiTestCase
+{
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsRouteShouldReturnErrorForNotAdminUsers()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        $request = new WP_REST_Request('PUT', "/give-api/v2/campaigns/$destinationCampaign->id/merge");
+        $request->set_query_params(
+            [
+                'id' => $destinationCampaign->id,
+                'campaignsToMergeIds' => [$campaign1->id, $campaign2->id],
+            ]
+        );
+
+        $response = $this->dispatchRequest($request);
+        $errorCode = $response->get_status();
+
+        $this->assertEquals(401, $errorCode);
+    }
+
+    /**
+     * @unreleased
+     *
+     * @throws Exception
+     */
+    public function testMergeCampaignsRouteShouldReturnTrueForAdminUsers()
+    {
+        /** @var Campaign $campaign1 */
+        $campaign1 = Campaign::factory()->create();
+        /** @var Campaign $campaign2 */
+        $campaign2 = Campaign::factory()->create();
+        /** @var Campaign $destinationCampaign */
+        $destinationCampaign = Campaign::factory()->create();
+
+        $newAdminUser = $this->factory()->user->create(
+            [
+                'role' => 'administrator',
+                'user_login' => 'admin38974238473824',
+                'user_pass' => 'admin38974238473824',
+                'user_email' => 'admin38974238473824@test.com',
+            ]
+        );
+        wp_set_current_user($newAdminUser);
+
+        $request = new WP_REST_Request('PUT', "/give-api/v2/campaigns/$destinationCampaign->id/merge");
+        $request->set_query_params(
+            [
+                'id' => $destinationCampaign->id,
+                'campaignsToMergeIds' => [$campaign1->id, $campaign2->id],
+            ]
+        );
+
+        $response = $this->dispatchRequest($request);
+        $merged = $response->get_data();
+
+        $this->assertTrue($merged);
+    }
+}
diff --git a/tests/Unit/DonationForms/TestTraits/LegacyDonationFormAdapter.php b/tests/Unit/DonationForms/TestTraits/LegacyDonationFormAdapter.php
index 16d95bc6af..4a1cd0aacb 100644
--- a/tests/Unit/DonationForms/TestTraits/LegacyDonationFormAdapter.php
+++ b/tests/Unit/DonationForms/TestTraits/LegacyDonationFormAdapter.php
@@ -2,6 +2,9 @@
 
 namespace Give\Tests\Unit\DonationForms\TestTraits;
 
+use Exception;
+use Give\Campaigns\Models\Campaign;
+use Give\Campaigns\Repositories\CampaignRepository;
 use Give\DonationForms\V2\Models\DonationForm;
 use Give\DonationForms\V2\Properties\DonationFormLevel;
 use Give\DonationForms\V2\ValueObjects\DonationFormStatus;
@@ -58,4 +61,13 @@ public function getDonationFormModelFromLegacyGiveDonateForm(Give_Donate_Form $g
         ]);
     }
 
+    /**
+     * @unreleased
+     */
+    public function createCampaignForDonationForm($formId)
+    {
+        $campaign = Campaign::factory()->create();
+        give(CampaignRepository::class)->addCampaignForm($campaign, $formId);
+    }
+
 }