diff --git a/mvp/b2c/src/app/signup/actions.ts b/mvp/b2c/src/app/signup/actions.ts
new file mode 100644
index 0000000..def78d2
--- /dev/null
+++ b/mvp/b2c/src/app/signup/actions.ts
@@ -0,0 +1,42 @@
+'use server';
+
+import { redirect } from 'next/navigation';
+import { eq } from 'drizzle-orm';
+import { db } from '@/db';
+import { tenants } from '@/db/schema';
+import { signupSchema, slugify } from '@/lib/validation/signup';
+import { getUserByEmail, createTenantWithOwner, slugDisponible } from '@/db/auth-queries';
+import { hashPassword } from '@/lib/auth/password';
+import { createSession } from '@/lib/auth/session';
+
+const TRIAL_MS = 14 * 24 * 60 * 60 * 1000;
+
+export async function signup(_prev: string | null, formData: FormData): Promise<string | null> {
+  const parsed = signupSchema.safeParse(Object.fromEntries(formData));
+  if (!parsed.success) return parsed.error.issues[0]?.message ?? 'Datos no válidos.';
+  const data = parsed.data;
+
+  if (await getUserByEmail(data.email)) return 'Ya existe una cuenta con ese email.';
+
+  let slug = slugify(data.empresa);
+  let n = 1;
+  while (!(await slugDisponible(slug))) slug = `${slugify(data.empresa)}-${++n}`;
+
+  const passwordHash = await hashPassword(data.password);
+  const { tenant, user } = await createTenantWithOwner({
+    nombreEmpresa: data.empresa,
+    slug,
+    provincia: data.provincia,
+    email: data.email,
+    passwordHash,
+    nombre: data.nombre,
+  });
+
+  await db
+    .update(tenants)
+    .set({ trialEndsAt: new Date(Date.now() + TRIAL_MS) })
+    .where(eq(tenants.id, tenant.id));
+
+  await createSession(user.id);
+  redirect('/panel');
+}
diff --git a/mvp/b2c/src/app/signup/page.tsx b/mvp/b2c/src/app/signup/page.tsx
new file mode 100644
index 0000000..7c5b86e
--- /dev/null
+++ b/mvp/b2c/src/app/signup/page.tsx
@@ -0,0 +1,29 @@
+'use client';
+
+import { useActionState } from 'react';
+import { signup } from './actions';
+
+export default function SignupPage() {
+  const [error, formAction, pending] = useActionState(signup, null);
+  return (
+    <main className="min-h-screen flex items-center justify-center bg-gray-50 px-6 py-12">
+      <form action={formAction} className="w-full max-w-md bg-white border border-gray-200 rounded-xl p-8 flex flex-col gap-4">
+        <h1 className="text-xl font-black tracking-tight text-black">Empieza gratis 14 días</h1>
+        <p className="text-sm text-gray-500">Sin tarjeta. Configura tu catálogo y recibe leads.</p>
+        <input name="nombre" placeholder="Tu nombre" required className="border border-gray-300 rounded-md px-3 py-2 text-sm" />
+        <input name="empresa" placeholder="Nombre de tu empresa" required className="border border-gray-300 rounded-md px-3 py-2 text-sm" />
+        <input name="email" type="email" placeholder="Email" required className="border border-gray-300 rounded-md px-3 py-2 text-sm" />
+        <input name="provincia" placeholder="Provincia" required className="border border-gray-300 rounded-md px-3 py-2 text-sm" />
+        <input name="password" type="password" placeholder="Contraseña (mín. 8)" required className="border border-gray-300 rounded-md px-3 py-2 text-sm" />
+        <label className="flex items-center gap-2 text-xs text-gray-500">
+          <input name="optInMarketing" type="checkbox" /> Quiero recibir novedades de Reformix
+        </label>
+        {error && <p className="text-sm text-red-600">{error}</p>}
+        <button type="submit" disabled={pending} className="bg-black text-white rounded-md py-2 font-semibold disabled:opacity-60">
+          {pending ? 'Creando cuenta…' : 'Crear cuenta'}
+        </button>
+        <a href="/login" className="text-xs text-gray-400 text-center hover:text-black">Ya tengo cuenta</a>
+      </form>
+    </main>
+  );
+}
diff --git a/mvp/b2c/src/db/auth-queries.ts b/mvp/b2c/src/db/auth-queries.ts
index 57536a6..fb60eee 100644
--- a/mvp/b2c/src/db/auth-queries.ts
+++ b/mvp/b2c/src/db/auth-queries.ts
@@ -45,3 +45,8 @@ export async function createTenantWithOwner(input: {
 
   return { tenant, user };
 }
+
+export async function slugDisponible(slug: string): Promise<boolean> {
+  const [row] = await db.select({ id: tenants.id }).from(tenants).where(eq(tenants.slug, slug)).limit(1);
+  return !row;
+}