diff --git a/e2e/tests/signup-flow.spec.ts b/e2e/tests/signup-flow.spec.ts
new file mode 100644
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--- /dev/null
+++ b/e2e/tests/signup-flow.spec.ts
@@ -0,0 +1,481 @@
+import { test, expect } from '@playwright/test';
+
+/**
+ * Comprehensive Signup Flow Tests
+ *
+ * Tests the complete user registration journey:
+ * 1. Account creation
+ * 2. Organization creation (first-time user)
+ * 3. Email confirmation
+ * 4. First login
+ * 5. Validation and error handling
+ */
+
+test.describe('Complete Signup Flow', () => {
+  // Use a unique email for each test run to avoid conflicts
+  const timestamp = Date.now();
+  const testEmail = `signup-test-${timestamp}@example.com`;
+  const testPassword = 'SecureTestPassword123!';
+  const testOrgName = `Test Org ${timestamp}`;
+
+  test.describe('New User Registration', () => {
+    test('can complete full signup flow', async ({ page }) => {
+      // Step 1: Navigate to registration page
+      await page.goto('/users/register');
+      await expect(page).toHaveURL(/\/users\/register/);
+
+      // Step 2: Fill out registration form
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(testEmail);
+      await passwordField.fill(testPassword);
+
+      // Look for password confirmation field if it exists
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      // Step 3: Submit registration
+      await submitButton.click();
+      await page.waitForTimeout(2000);
+
+      // Step 4: Should redirect to org creation or dashboard
+      const currentUrl = page.url();
+
+      // Could redirect to various places depending on app flow:
+      // - Organization creation page
+      // - Dashboard (if org auto-created)
+      // - Email confirmation prompt
+      // - TOTP enrollment
+
+      if (currentUrl.includes('/organizations/new') || currentUrl.includes('/org/new')) {
+        // Organization creation flow
+        const orgNameField = page.locator('input[name*="name"]').first();
+
+        if (await orgNameField.isVisible({ timeout: 2000 }).catch(() => false)) {
+          await orgNameField.fill(testOrgName);
+
+          const orgSubmitButton = page.locator('button[type="submit"]').first();
+          await orgSubmitButton.click();
+          await page.waitForTimeout(2000);
+        }
+      }
+
+      // Step 5: Verify successful signup (should be on dashboard or similar)
+      // Check we're NOT on the login or register page anymore
+      const finalUrl = page.url();
+      expect(finalUrl).not.toContain('/users/log-in');
+      expect(finalUrl).not.toContain('/users/register');
+
+      // Should see some authenticated user content
+      await expect(page.locator('body')).toBeVisible();
+    });
+
+    test('shows validation error for invalid email', async ({ page }) => {
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      // Try to register with invalid email
+      await emailField.fill('not-an-email');
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(1000);
+
+      // Should show validation error
+      const error = page.locator('.error, [role="alert"], :has-text("invalid"), :has-text("valid email")').first();
+
+      if (await error.isVisible({ timeout: 2000 }).catch(() => false)) {
+        await expect(error).toBeVisible();
+      }
+
+      // Should still be on registration page
+      expect(page.url()).toContain('/users/register');
+    });
+
+    test('shows error for weak password', async ({ page }) => {
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(`weak-pwd-${Date.now()}@example.com`);
+      await passwordField.fill('123');  // Too short/weak
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill('123');
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(1000);
+
+      // Should show password validation error
+      const error = page.locator(':has-text("password"), :has-text("characters"), :has-text("least")').first();
+
+      if (await error.isVisible({ timeout: 2000 }).catch(() => false)) {
+        await expect(error).toBeVisible();
+      }
+
+      expect(page.url()).toContain('/users/register');
+    });
+
+    test('shows error for duplicate email', async ({ page }) => {
+      // First, try to register with the e2e test account email (known to exist)
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill('e2e-test@towerops.local'); // Known existing account
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(1000);
+
+      // Should show duplicate error
+      const error = page.locator(':has-text("already"), :has-text("taken"), :has-text("exists")').first();
+
+      if (await error.isVisible({ timeout: 2000 }).catch(() => false)) {
+        await expect(error).toBeVisible();
+      }
+    });
+
+    test('shows error when passwords do not match', async ({ page }) => {
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordFields = page.locator('input[type="password"]');
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(`mismatch-${Date.now()}@example.com`);
+
+      // Fill first password field
+      await passwordFields.first().fill(testPassword);
+
+      // Fill second password field with different value
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill('DifferentPassword123!');
+
+        await submitButton.click();
+        await page.waitForTimeout(1000);
+
+        // Should show mismatch error
+        const error = page.locator(':has-text("match"), :has-text("same")').first();
+
+        if (await error.isVisible({ timeout: 2000 }).catch(() => false)) {
+          await expect(error).toBeVisible();
+        }
+      }
+    });
+  });
+
+  test.describe('Organization Creation for New Users', () => {
+    test('prompts new user to create organization', async ({ page }) => {
+      const uniqueEmail = `org-test-${Date.now()}@example.com`;
+
+      // Register new account
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(uniqueEmail);
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(2000);
+
+      // Check if redirected to org creation
+      const currentUrl = page.url();
+
+      if (currentUrl.includes('/organizations/new') || currentUrl.includes('/org/new')) {
+        // Verify org creation form is shown
+        const orgNameField = page.locator('input[name*="name"]').first();
+        await expect(orgNameField).toBeVisible();
+      } else {
+        // Org might be auto-created - just verify we're authenticated
+        expect(currentUrl).not.toContain('/users/log-in');
+        expect(currentUrl).not.toContain('/users/register');
+      }
+    });
+
+    test('can create organization after registration', async ({ page }) => {
+      const uniqueEmail = `org-create-${Date.now()}@example.com`;
+      const orgName = `E2E Test Org ${Date.now()}`;
+
+      // Register
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(uniqueEmail);
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(2000);
+
+      // If on org creation page, create org
+      if (page.url().includes('/organizations/new') || page.url().includes('/org/new')) {
+        const orgNameField = page.locator('input[name*="name"]').first();
+        const orgSubmitButton = page.locator('button[type="submit"]').first();
+
+        await orgNameField.fill(orgName);
+        await orgSubmitButton.click();
+        await page.waitForTimeout(2000);
+
+        // Should redirect to dashboard or welcome page
+        const finalUrl = page.url();
+        expect(finalUrl).not.toContain('/organizations/new');
+        expect(finalUrl).not.toContain('/org/new');
+      }
+
+      // Verify we're authenticated and can see content
+      await expect(page.locator('body')).toBeVisible();
+    });
+  });
+
+  test.describe('Post-Registration Flow', () => {
+    test('can log in after registration', async ({ page }) => {
+      const uniqueEmail = `login-after-reg-${Date.now()}@example.com`;
+
+      // Step 1: Register
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(uniqueEmail);
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(2000);
+
+      // Complete org creation if prompted
+      if (page.url().includes('/organizations/new') || page.url().includes('/org/new')) {
+        const orgNameField = page.locator('input[name*="name"]').first();
+        if (await orgNameField.isVisible({ timeout: 2000 }).catch(() => false)) {
+          await orgNameField.fill(`Test Org ${Date.now()}`);
+          const orgSubmitButton = page.locator('button[type="submit"]').first();
+          await orgSubmitButton.click();
+          await page.waitForTimeout(2000);
+        }
+      }
+
+      // Step 2: Log out
+      const userMenu = page.locator('[data-user-menu], button:has-text("Settings"), a:has-text("Settings")').first();
+      if (await userMenu.isVisible({ timeout: 2000 }).catch(() => false)) {
+        await userMenu.click();
+        await page.waitForTimeout(500);
+
+        const logoutButton = page.locator('a:has-text("Log out"), button:has-text("Log out")').first();
+        if (await logoutButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+          await logoutButton.click();
+          await page.waitForTimeout(1000);
+        }
+      }
+
+      // Step 3: Log back in
+      await page.goto('/users/log-in');
+
+      const loginEmailField = page.locator('input[type="email"]').first();
+      const loginPasswordField = page.locator('input[type="password"]').first();
+      const loginSubmitButton = page.locator('button[type="submit"]').first();
+
+      await loginEmailField.fill(uniqueEmail);
+      await loginPasswordField.fill(testPassword);
+      await loginSubmitButton.click();
+      await page.waitForTimeout(2000);
+
+      // Should be logged in - not on login page
+      const finalUrl = page.url();
+      expect(finalUrl).not.toContain('/users/log-in');
+    });
+
+    test('new user can access dashboard after signup', async ({ page }) => {
+      const uniqueEmail = `dashboard-access-${Date.now()}@example.com`;
+
+      // Register
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(uniqueEmail);
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(2000);
+
+      // Complete org creation if needed
+      if (page.url().includes('/organizations/new') || page.url().includes('/org/new')) {
+        const orgNameField = page.locator('input[name*="name"]').first();
+        if (await orgNameField.isVisible({ timeout: 2000 }).catch(() => false)) {
+          await orgNameField.fill(`Test Org ${Date.now()}`);
+          const orgSubmitButton = page.locator('button[type="submit"]').first();
+          await orgSubmitButton.click();
+          await page.waitForTimeout(2000);
+        }
+      }
+
+      // Navigate to dashboard
+      await page.goto('/dashboard');
+      await page.waitForTimeout(1000);
+
+      // Should be able to access dashboard
+      await expect(page).toHaveURL(/\/dashboard/);
+      await expect(page.locator('body')).toBeVisible();
+    });
+  });
+
+  test.describe('Email Confirmation', () => {
+    test('shows confirmation prompt after registration', async ({ page }) => {
+      const uniqueEmail = `confirm-${Date.now()}@example.com`;
+
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(uniqueEmail);
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      await submitButton.click();
+      await page.waitForTimeout(2000);
+
+      // Look for confirmation message (might be flash message or separate page)
+      const confirmationMessage = page.locator(':has-text("confirm"), :has-text("email"), :has-text("check")').first();
+
+      if (await confirmationMessage.isVisible({ timeout: 2000 }).catch(() => false)) {
+        await expect(confirmationMessage).toBeVisible();
+      }
+    });
+
+    test('can resend confirmation email', async ({ page }) => {
+      await page.goto('/users/confirm');
+
+      const resendButton = page.locator('button:has-text("Resend"), a:has-text("Resend")').first();
+
+      if (await resendButton.isVisible({ timeout: 2000 }).catch(() => false)) {
+        await resendButton.click();
+        await page.waitForTimeout(1000);
+
+        // Should show success message
+        const successMessage = page.locator(':has-text("sent"), :has-text("check")').first();
+
+        if (await successMessage.isVisible({ timeout: 2000 }).catch(() => false)) {
+          await expect(successMessage).toBeVisible();
+        }
+      }
+    });
+  });
+
+  test.describe('Security Features', () => {
+    test('registration form has CSRF protection', async ({ page }) => {
+      await page.goto('/users/register');
+
+      // Look for CSRF token in form
+      const csrfInput = page.locator('input[name="_csrf_token"], input[name="csrf_token"]').first();
+
+      if (await csrfInput.isVisible({ timeout: 1000 }).catch(() => false)) {
+        const csrfValue = await csrfInput.getAttribute('value');
+        expect(csrfValue).toBeTruthy();
+        expect(csrfValue!.length).toBeGreaterThan(10);
+      }
+    });
+
+    test('password field is properly masked', async ({ page }) => {
+      await page.goto('/users/register');
+
+      const passwordField = page.locator('input[type="password"]').first();
+
+      if (await passwordField.isVisible({ timeout: 2000 }).catch(() => false)) {
+        const inputType = await passwordField.getAttribute('type');
+        expect(inputType).toBe('password');
+      }
+    });
+
+    test('form prevents double submission', async ({ page }) => {
+      await page.goto('/users/register');
+
+      const emailField = page.locator('input[type="email"]').first();
+      const passwordField = page.locator('input[type="password"]').first();
+      const submitButton = page.locator('button[type="submit"]').first();
+
+      await emailField.fill(`double-submit-${Date.now()}@example.com`);
+      await passwordField.fill(testPassword);
+
+      const passwordConfirmField = page.locator('input[name*="password_confirmation"], input[name*="confirm"]').first();
+      if (await passwordConfirmField.isVisible({ timeout: 1000 }).catch(() => false)) {
+        await passwordConfirmField.fill(testPassword);
+      }
+
+      // Try to click submit multiple times rapidly
+      await Promise.all([
+        submitButton.click(),
+        submitButton.click({ force: true }).catch(() => {}),
+        submitButton.click({ force: true }).catch(() => {})
+      ]);
+
+      await page.waitForTimeout(2000);
+
+      // Button should be disabled after first click
+      const isDisabled = await submitButton.isDisabled().catch(() => false);
+
+      if (!isDisabled) {
+        // At minimum, form should have been submitted (not crashed)
+        await expect(page.locator('body')).toBeVisible();
+      }
+    });
+  });
+});