diff --git a/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.server.ts b/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.server.ts
index a9a5329..05a057a 100644
--- a/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.server.ts
+++ b/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.server.ts
@@ -1,8 +1,10 @@
-import { error } from '@sveltejs/kit';
-import type { PageServerLoad } from './$types';
+import { error, fail } from '@sveltejs/kit';
+import type { Actions, PageServerLoad } from './$types';
 import { db } from '$lib/server/db/index.js';
 import { projects, expenses, users, categories } from '$lib/server/db/schema.js';
 import { eq, and, sql } from 'drizzle-orm';
+import { requireCompanyRole } from '$lib/server/authorization.js';
+import { logCompanyEvent } from '$lib/server/audit.js';
 
 export const load: PageServerLoad = async ({ params, parent }) => {
 	await parent();
@@ -48,3 +50,40 @@ export const load: PageServerLoad = async ({ params, parent }) => {
 
 	return { project, expenses: expenseList, stats };
 };
+
+export const actions: Actions = {
+	updateProject: async ({ request, locals, params }) => {
+		const { user } = await requireCompanyRole(locals, params.companyId, 'manager');
+
+		const fd = await request.formData();
+		const name = fd.get('name')?.toString().trim();
+		const description = fd.get('description')?.toString().trim() || null;
+
+		if (!name) return fail(400, { action: 'updateProject', error: 'Project name is required' });
+
+		const [existing] = await db
+			.select({ id: projects.id, name: projects.name })
+			.from(projects)
+			.where(and(eq(projects.id, params.projectId), eq(projects.companyId, params.companyId)))
+			.limit(1);
+		if (!existing) error(404, 'Project not found');
+
+		await db
+			.update(projects)
+			.set({ name, description, updatedAt: new Date() })
+			.where(eq(projects.id, params.projectId));
+
+		const renamed = existing.name !== name;
+		await logCompanyEvent(
+			params.companyId,
+			user.id,
+			'project_updated',
+			renamed
+				? `Project renamed from "${existing.name}" to "${name}"`
+				: `Project "${name}" updated`,
+			{ projectId: params.projectId, previousName: existing.name, newName: name }
+		);
+
+		return { success: true, action: 'updateProject' };
+	}
+};
diff --git a/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.svelte b/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.svelte
index 2fe67c6..02112c4 100644
--- a/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.svelte
+++ b/src/routes/(app)/companies/[companyId]/projects/[projectId]/+page.svelte
@@ -1,10 +1,14 @@
 <script lang="ts">
-	import type { PageData } from './$types';
+	import { enhance } from '$app/forms';
+	import type { PageData, ActionData } from './$types';
 	import { formatCurrency } from '$lib/utils/currency.js';
 
-	let { data } = $props();
+	let { data, form }: { data: PageData; form: ActionData } = $props();
 	const currency = $derived(data.company.currency);
 	const canAddExpense = $derived(data.companyRoles.some(r => r === 'admin' || r === 'manager' || r === 'user' || r === 'hr'));
+	const canEdit = $derived(data.companyRoles.some(r => r === 'admin' || r === 'manager'));
+
+	let editing = $state(false);
 </script>
 
 <svelte:head>
@@ -12,14 +16,68 @@
 </svelte:head>
 
 <div>
-	<div class="mb-4 flex items-center justify-between">
-		<div>
-			<h2 class="text-lg font-semibold text-gray-900 dark:text-white">{data.project.name}</h2>
-			{#if data.project.description}
-				<p class="text-sm text-gray-500 dark:text-gray-400">{data.project.description}</p>
+	<div class="mb-4 flex items-start justify-between gap-3">
+		<div class="min-w-0 flex-1">
+			{#if editing && canEdit}
+				<form
+					method="POST"
+					action="?/updateProject"
+					use:enhance={() => async ({ result, update }) => {
+						await update({ reset: false });
+						if (result.type === 'success') editing = false;
+					}}
+					class="space-y-2"
+				>
+					<input
+						name="name"
+						type="text"
+						required
+						value={data.project.name}
+						class="w-full rounded-md border border-gray-300 px-3 py-2 text-lg font-semibold dark:border-gray-600 dark:bg-gray-700 dark:text-white"
+					/>
+					<textarea
+						name="description"
+						rows="2"
+						placeholder="Description (optional)"
+						class="w-full rounded-md border border-gray-300 px-3 py-2 text-sm dark:border-gray-600 dark:bg-gray-700 dark:text-white">{data.project.description ?? ''}</textarea>
+					<div class="flex gap-2">
+						<button
+							type="submit"
+							class="rounded-md bg-blue-600 px-3 py-1.5 text-sm font-medium text-white hover:bg-blue-700"
+						>
+							Save
+						</button>
+						<button
+							type="button"
+							onclick={() => (editing = false)}
+							class="rounded-md border border-gray-300 px-3 py-1.5 text-sm font-medium text-gray-700 hover:bg-gray-50 dark:border-gray-600 dark:text-gray-200 dark:hover:bg-gray-700"
+						>
+							Cancel
+						</button>
+					</div>
+					{#if form?.action === 'updateProject' && form.error}
+						<p class="text-sm text-red-600 dark:text-red-400">{form.error}</p>
+					{/if}
+				</form>
+			{:else}
+				<div class="flex items-center gap-2">
+					<h2 class="text-lg font-semibold text-gray-900 dark:text-white">{data.project.name}</h2>
+					{#if canEdit}
+						<button
+							type="button"
+							onclick={() => (editing = true)}
+							class="text-xs font-medium text-blue-600 hover:text-blue-700 dark:text-blue-400"
+						>
+							Edit
+						</button>
+					{/if}
+				</div>
+				{#if data.project.description}
+					<p class="text-sm text-gray-500 dark:text-gray-400">{data.project.description}</p>
+				{/if}
 			{/if}
 		</div>
-		{#if canAddExpense}
+		{#if canAddExpense && !editing}
 			<a
 				href="/companies/{data.company.id}/projects/{data.project.id}/expenses/new"
 				class="rounded-md bg-blue-600 px-4 py-2 text-sm font-medium text-white hover:bg-blue-700"