diff --git a/src/app/api/admin/companies/[id]/route.ts b/src/app/api/admin/companies/[id]/route.ts
index 57d2420..7357065 100644
--- a/src/app/api/admin/companies/[id]/route.ts
+++ b/src/app/api/admin/companies/[id]/route.ts
@@ -48,6 +48,9 @@ export async function PATCH(request: Request, { params }: { params: Promise<{ id
     return NextResponse.json({ company })
   } catch (error) {
     console.error("Failed to update company", error)
+    if (error instanceof Prisma.PrismaClientKnownRequestError && error.code === "P2002") {
+      return NextResponse.json({ error: "Já existe uma empresa com este slug." }, { status: 409 })
+    }
     return NextResponse.json({ error: "Falha ao atualizar empresa" }, { status: 500 })
   }
 }
diff --git a/src/app/api/admin/companies/route.ts b/src/app/api/admin/companies/route.ts
index ec35306..d34d617 100644
--- a/src/app/api/admin/companies/route.ts
+++ b/src/app/api/admin/companies/route.ts
@@ -2,6 +2,7 @@ import { NextResponse } from "next/server"
 import { randomBytes } from "crypto"
 
 import { prisma } from "@/lib/prisma"
+import { Prisma } from "@prisma/client"
 import { assertStaffSession } from "@/lib/auth-server"
 import { isAdmin } from "@/lib/authz"
 
@@ -27,13 +28,15 @@ export async function POST(request: Request) {
   const body = (await request.json()) as Partial<{
     name: string
     slug: string
+    isAvulso: boolean
+    contractedHoursPerMonth: number | string | null
     cnpj: string | null
     domain: string | null
     phone: string | null
     description: string | null
     address: string | null
   }>
-  const { name, slug, cnpj, domain, phone, description, address } = body ?? {}
+  const { name, slug, isAvulso, contractedHoursPerMonth, cnpj, domain, phone, description, address } = body ?? {}
   if (!name || !slug) {
     return NextResponse.json({ error: "Nome e slug são obrigatórios" }, { status: 400 })
   }
@@ -46,7 +49,14 @@ export async function POST(request: Request) {
         name: String(name),
         slug: String(slug),
         provisioningCode,
-        // Campos opcionais (isAvulso, contractedHoursPerMonth) podem ser definidos via PATCH posteriormente.
+        // Campos opcionais
+        isAvulso: Boolean(isAvulso ?? false),
+        contractedHoursPerMonth:
+          typeof contractedHoursPerMonth === "number"
+            ? contractedHoursPerMonth
+            : contractedHoursPerMonth
+            ? Number(contractedHoursPerMonth)
+            : null,
         cnpj: cnpj ? String(cnpj) : null,
         domain: domain ? String(domain) : null,
         phone: phone ? String(phone) : null,
@@ -57,6 +67,13 @@ export async function POST(request: Request) {
     return NextResponse.json({ company })
   } catch (error) {
     console.error("Failed to create company", error)
+    if (error instanceof Prisma.PrismaClientKnownRequestError && error.code === "P2002") {
+      // Duplicidade de slug por tenant ou provisioningCode único
+      return NextResponse.json(
+        { error: "Já existe uma empresa com este slug ou código de provisionamento." },
+        { status: 409 }
+      )
+    }
     return NextResponse.json({ error: "Falha ao criar empresa" }, { status: 500 })
   }
 }