diff --git a/app/Http/Requests/V1/TimeEntry/TimeEntryIndexExportRequest.php b/app/Http/Requests/V1/TimeEntry/TimeEntryIndexExportRequest.php
index 5daa61e1..70447609 100644
--- a/app/Http/Requests/V1/TimeEntry/TimeEntryIndexExportRequest.php
+++ b/app/Http/Requests/V1/TimeEntry/TimeEntryIndexExportRequest.php
@@ -6,6 +6,7 @@ namespace App\Http\Requests\V1\TimeEntry;
 
 use App\Enums\ExportFormat;
 use App\Enums\TimeEntryRoundingType;
+use App\Models\Client;
 use App\Models\Member;
 use App\Models\Organization;
 use App\Models\Project;
@@ -58,6 +59,23 @@ class TimeEntryIndexExportRequest extends TimeEntryIndexRequest
                     return $builder->whereBelongsTo($this->organization, 'organization');
                 }),
             ],
+            // Filter by client IDs, client IDs are OR combined
+            'client_ids' => [
+                'array',
+                'min:1',
+            ],
+            'client_ids.*' => [
+                'string',
+                function (string $attribute, mixed $value, \Closure $fail): void {
+                    if ($value === TimeEntryFilter::NONE_VALUE) {
+                        return;
+                    }
+                    ExistsEloquent::make(Client::class, null, function (Builder $builder): Builder {
+                        /** @var Builder<Client> $builder */
+                        return $builder->whereBelongsTo($this->organization, 'organization');
+                    })->uuid()->validate($attribute, $value, $fail);
+                },
+            ],
             // Filter by project IDs, project IDs are OR combined
             'project_ids' => [
                 'array',
diff --git a/e2e/members.spec.ts b/e2e/members.spec.ts
index 49661246..7f182811 100644
--- a/e2e/members.spec.ts
+++ b/e2e/members.spec.ts
@@ -205,7 +205,9 @@ test('test that merging a placeholder member works', async ({ page }) => {
         page.getByRole('button', { name: 'Merge Member' }).click(),
         page.waitForResponse(
             (response) =>
-                response.url().includes('/member/') && response.url().includes('/merge-into') && response.ok()
+                response.url().includes('/member/') &&
+                response.url().includes('/merge-into') &&
+                response.ok()
         ),
     ]);
 
diff --git a/e2e/utils/reporting.ts b/e2e/utils/reporting.ts
index d7b63421..d48c793c 100644
--- a/e2e/utils/reporting.ts
+++ b/e2e/utils/reporting.ts
@@ -52,11 +52,7 @@ export async function createClient(page: Page, clientName: string) {
     await expect(page.getByText(clientName)).toBeVisible();
 }
 
-export async function createProjectWithClient(
-    page: Page,
-    projectName: string,
-    clientName: string
-) {
+export async function createProjectWithClient(page: Page, projectName: string, clientName: string) {
     await page.goto(PLAYWRIGHT_BASE_URL + '/projects');
     await expect(page.getByRole('button', { name: 'Create Project' })).toBeVisible();
     await page.getByRole('button', { name: 'Create Project' }).click();
diff --git a/resources/js/Components/Common/Reporting/ReportingFilterBar.vue b/resources/js/Components/Common/Reporting/ReportingFilterBar.vue
index 085ef5f3..8c6e740c 100644
--- a/resources/js/Components/Common/Reporting/ReportingFilterBar.vue
+++ b/resources/js/Components/Common/Reporting/ReportingFilterBar.vue
@@ -51,9 +51,7 @@ async function createTag(name: string) {
         <MainContainer class="sm:flex space-y-4 sm:space-y-0 justify-between">
             <div class="flex flex-wrap items-center space-y-2 sm:space-y-0 space-x-3">
                 <div class="text-sm font-medium">Filters</div>
-                <MemberMultiselectDropdown
-                    v-model="selectedMembers"
-                    @submit="emit('submit')">
+                <MemberMultiselectDropdown v-model="selectedMembers" @submit="emit('submit')">
                     <template #trigger>
                         <ReportingFilterBadge
                             :count="selectedMembers.length"
@@ -62,9 +60,7 @@ async function createTag(name: string) {
                             :icon="UserGroupIcon" />
                     </template>
                 </MemberMultiselectDropdown>
-                <ProjectMultiselectDropdown
-                    v-model="selectedProjects"
-                    @submit="emit('submit')">
+                <ProjectMultiselectDropdown v-model="selectedProjects" @submit="emit('submit')">
                     <template #trigger>
                         <ReportingFilterBadge
                             :count="selectedProjects.length"
@@ -73,9 +69,7 @@ async function createTag(name: string) {
                             :icon="FolderIcon" />
                     </template>
                 </ProjectMultiselectDropdown>
-                <TaskMultiselectDropdown
-                    v-model="selectedTasks"
-                    @submit="emit('submit')">
+                <TaskMultiselectDropdown v-model="selectedTasks" @submit="emit('submit')">
                     <template #trigger>
                         <ReportingFilterBadge
                             :count="selectedTasks.length"
@@ -84,9 +78,7 @@ async function createTag(name: string) {
                             :icon="CheckCircleIcon" />
                     </template>
                 </TaskMultiselectDropdown>
-                <ClientMultiselectDropdown
-                    v-model="selectedClients"
-                    @submit="emit('submit')">
+                <ClientMultiselectDropdown v-model="selectedClients" @submit="emit('submit')">
                     <template #trigger>
                         <ReportingFilterBadge
                             :count="selectedClients.length"
diff --git a/resources/js/Components/Common/Reporting/ReportingOverview.vue b/resources/js/Components/Common/Reporting/ReportingOverview.vue
index 5f5caada..51316e87 100644
--- a/resources/js/Components/Common/Reporting/ReportingOverview.vue
+++ b/resources/js/Components/Common/Reporting/ReportingOverview.vue
@@ -182,13 +182,13 @@ const groupedPieChartData = computed(() => {
         aggregatedTableTimeEntries.value?.grouped_data?.map((entry) => {
             const name = getNameForReportingRowEntry(
                 entry.key,
-                aggregatedTableTimeEntries.value?.grouped_type
+                aggregatedTableTimeEntries.value?.grouped_type ?? null
             );
             let color = getRandomColorWithSeed(entry.key ?? 'none');
             if (
                 name &&
                 aggregatedTableTimeEntries.value?.grouped_type &&
-                emptyPlaceholder[aggregatedTableTimeEntries.value?.grouped_type] === name
+                emptyPlaceholder[aggregatedTableTimeEntries.value.grouped_type] === name
             ) {
                 color = '#CCCCCC';
             } else if (aggregatedTableTimeEntries.value?.grouped_type === 'project') {
@@ -200,7 +200,7 @@ const groupedPieChartData = computed(() => {
                 name:
                     getNameForReportingRowEntry(
                         entry.key,
-                        aggregatedTableTimeEntries.value?.grouped_type
+                        aggregatedTableTimeEntries.value?.grouped_type ?? null
                     ) ?? '',
                 color: color,
             };
@@ -215,7 +215,7 @@ const tableData = computed(() => {
             cost: entry.cost,
             description: getNameForReportingRowEntry(
                 entry.key,
-                aggregatedTableTimeEntries.value?.grouped_type
+                aggregatedTableTimeEntries.value?.grouped_type ?? null
             ),
             grouped_data:
                 entry.grouped_data?.map((el) => {
@@ -256,13 +256,12 @@ const tableData = computed(() => {
         v-model:rounding-type="roundingType"
         v-model:rounding-minutes="roundingMinutes"
         v-model:start-date="startDate"
-        v-model:end-date="endDate"
-        />
+        v-model:end-date="endDate" />
     <MainContainer>
         <div class="pt-10 w-full px-3 relative">
             <ReportingChart
-                :grouped-type="aggregatedGraphTimeEntries?.grouped_type"
-                :grouped-data="aggregatedGraphTimeEntries?.grouped_data"></ReportingChart>
+                :grouped-type="aggregatedGraphTimeEntries?.grouped_type ?? null"
+                :grouped-data="aggregatedGraphTimeEntries?.grouped_data ?? null"></ReportingChart>
         </div>
     </MainContainer>
     <MainContainer>
@@ -273,13 +272,13 @@ const tableData = computed(() => {
                     <span>Group by</span>
                     <ReportingGroupBySelect
                         v-model="group"
-                        :group-by-options="groupByOptions"
-                        ></ReportingGroupBySelect>
+                        :group-by-options="groupByOptions"></ReportingGroupBySelect>
                     <span>and</span>
                     <ReportingGroupBySelect
                         v-model="subGroup"
-                        :group-by-options="groupByOptions.filter((el) => el.value !== group)"
-                        ></ReportingGroupBySelect>
+                        :group-by-options="
+                            groupByOptions.filter((el) => el.value !== group)
+                        "></ReportingGroupBySelect>
                 </div>
                 <div class="grid items-center" style="grid-template-columns: 1fr 100px 150px">
                     <div
diff --git a/resources/js/packages/ui/src/Input/MultiselectDropdown.vue b/resources/js/packages/ui/src/Input/MultiselectDropdown.vue
index 7fcf2853..4ba6b758 100644
--- a/resources/js/packages/ui/src/Input/MultiselectDropdown.vue
+++ b/resources/js/packages/ui/src/Input/MultiselectDropdown.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts" generic="T">
 import Dropdown from '@/packages/ui/src/Input/Dropdown.vue';
-import { computed, ref, watch } from 'vue';
+import { computed, type Ref, ref, watch } from 'vue';
 import Checkbox from '@/packages/ui/src/Input/Checkbox.vue';
 import {
     ComboboxAnchor,
@@ -27,7 +27,7 @@ const props = defineProps<{
 
 const open = ref(false);
 const searchValue = ref('');
-const sortedItems = ref<T[]>([]);
+const sortedItems = ref<T[]>([]) as Ref<T[]>;
 
 watch(open, (isOpen) => {
     if (isOpen) {
@@ -43,7 +43,9 @@ watch(open, (isOpen) => {
 const filteredItems = computed(() => {
     const search = searchValue.value.toLowerCase().trim();
     if (!search) return sortedItems.value;
-    return sortedItems.value.filter((item) => props.getNameForItem(item).toLowerCase().includes(search));
+    return sortedItems.value.filter((item) =>
+        props.getNameForItem(item).toLowerCase().includes(search)
+    );
 });
 
 const showNoItem = computed(() => {
diff --git a/resources/js/utils/useAggregatedTimeEntriesQuery.ts b/resources/js/utils/useAggregatedTimeEntriesQuery.ts
index e7cbf510..0fc50bea 100644
--- a/resources/js/utils/useAggregatedTimeEntriesQuery.ts
+++ b/resources/js/utils/useAggregatedTimeEntriesQuery.ts
@@ -1,5 +1,9 @@
 import { useQuery } from '@tanstack/vue-query';
-import { api, type AggregatedTimeEntriesQueryParams, type ReportingResponse } from '@/packages/api/src';
+import {
+    api,
+    type AggregatedTimeEntriesQueryParams,
+    type ReportingResponse,
+} from '@/packages/api/src';
 import { getCurrentOrganizationId } from '@/utils/useUser';
 import { computed, type ComputedRef, unref } from 'vue';
 
diff --git a/tests/Unit/Endpoint/Api/V1/TimeEntryEndpointTest.php b/tests/Unit/Endpoint/Api/V1/TimeEntryEndpointTest.php
index 4b65c4e9..f0ad4750 100644
--- a/tests/Unit/Endpoint/Api/V1/TimeEntryEndpointTest.php
+++ b/tests/Unit/Endpoint/Api/V1/TimeEntryEndpointTest.php
@@ -1559,6 +1559,84 @@ class TimeEntryEndpointTest extends ApiEndpointTestAbstract
         $this->assertResponseCode($response, 200);
     }
 
+    public function test_index_export_endpoint_with_client_ids_filter_returns_filtered_entries(): void
+    {
+        // Arrange
+        $data = $this->createUserWithPermission([
+            'time-entries:view:all',
+        ]);
+        $clientA = Client::factory()->forOrganization($data->organization)->create();
+        $clientB = Client::factory()->forOrganization($data->organization)->create();
+        $projectA = Project::factory()->forOrganization($data->organization)->forClient($clientA)->create();
+        $projectB = Project::factory()->forOrganization($data->organization)->forClient($clientB)->create();
+        $timeEntry1 = TimeEntry::factory()->forOrganization($data->organization)->forProject($projectA)->forMember($data->member)->startWithDuration(Carbon::now(), 100)->create();
+        $timeEntry2 = TimeEntry::factory()->forOrganization($data->organization)->forProject($projectB)->forMember($data->member)->startWithDuration(Carbon::now(), 100)->create();
+        Passport::actingAs($data->user);
+
+        // Act
+        $response = $this->getJson(route('api.v1.time-entries.index-export', [
+            $data->organization->getKey(),
+            'format' => ExportFormat::CSV,
+            'client_ids' => [$clientA->getKey()],
+            'start' => Carbon::now()->startOfYear()->toIso8601ZuluString(),
+            'end' => Carbon::now()->endOfYear()->toIso8601ZuluString(),
+        ]));
+
+        // Assert
+        $this->assertResponseCode($response, 200);
+    }
+
+    public function test_index_export_endpoint_with_none_client_ids_filter_succeeds(): void
+    {
+        // Arrange
+        $data = $this->createUserWithPermission([
+            'time-entries:view:all',
+        ]);
+        $client = Client::factory()->forOrganization($data->organization)->create();
+        $project = Project::factory()->forOrganization($data->organization)->forClient($client)->create();
+        $timeEntry1 = TimeEntry::factory()->forOrganization($data->organization)->forMember($data->member)->startWithDuration(Carbon::now(), 100)->create();
+        $timeEntry2 = TimeEntry::factory()->forOrganization($data->organization)->forProject($project)->forMember($data->member)->startWithDuration(Carbon::now(), 100)->create();
+        Passport::actingAs($data->user);
+
+        // Act
+        $response = $this->getJson(route('api.v1.time-entries.index-export', [
+            $data->organization->getKey(),
+            'format' => ExportFormat::CSV,
+            'client_ids' => [TimeEntryFilter::NONE_VALUE],
+            'start' => Carbon::now()->startOfYear()->toIso8601ZuluString(),
+            'end' => Carbon::now()->endOfYear()->toIso8601ZuluString(),
+        ]));
+
+        // Assert
+        $this->assertResponseCode($response, 200);
+    }
+
+    public function test_index_export_endpoint_with_client_ids_of_other_organization_fails_validation(): void
+    {
+        // Arrange
+        $data = $this->createUserWithPermission([
+            'time-entries:view:all',
+        ]);
+        $otherData = $this->createUserWithPermission([
+            'time-entries:view:all',
+        ]);
+        $otherClient = Client::factory()->forOrganization($otherData->organization)->create();
+        Passport::actingAs($data->user);
+
+        // Act
+        $response = $this->getJson(route('api.v1.time-entries.index-export', [
+            $data->organization->getKey(),
+            'format' => ExportFormat::CSV,
+            'client_ids' => [$otherClient->getKey()],
+            'start' => Carbon::now()->startOfYear()->toIso8601ZuluString(),
+            'end' => Carbon::now()->endOfYear()->toIso8601ZuluString(),
+        ]));
+
+        // Assert
+        $response->assertStatus(422);
+        $response->assertJsonValidationErrorFor('client_ids.0');
+    }
+
     public function test_aggregate_endpoint_fails_if_user_has_only_access_to_own_time_entries_but_does_not_filter_for_this(): void
     {
         // Arrange