diff --git a/README.md b/README.md
index 2bb96a6..e5da93a 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ The defaults are starting points and are fully editable in the dashboard.
 | Voice archive/export | No | Yes | Yes |
 | Email 2FA | No | Yes | Yes |
 
-Each tier can independently configure its price, currency, billing interval, Stripe Price ID, active status, sort order, archive retention, group limit, and every feature entitlement.
+Each tier has an explicit **Enable groups for this tier** toggle and a separate **Maximum People Per Group** value. The minimum is two people, including the group owner; disabling groups uses the toggle rather than a numeric value of zero.
 
 Administrators can assign a tier directly from **Admin > Users > Edit > Tier Override**. The override grants that tier's features without changing Stripe billing data and remains in effect until it is changed back to **Follow Stripe / billing status**.
 
diff --git a/lib/admin_platform.php b/lib/admin_platform.php
index bba4b24..9fa9538 100644
--- a/lib/admin_platform.php
+++ b/lib/admin_platform.php
@@ -125,9 +125,8 @@ function renderAdminPlatformTab(): void {
     $events = $db->query("SELECT event_type,COUNT(*) AS total FROM visitor_events
         WHERE created_at>" . (time() - 2592000) . " GROUP BY event_type ORDER BY total DESC")->fetchAll();
     $featureKeys = [
-        'voice_messages', 'recording_status', 'auto_voice_send', 'auto_voice_play', 'groups_available', 'group_member_limit',
-        'username_color', 'text_archive_days', 'text_export', 'voice_archive',
-        'voice_export', 'email_2fa',
+        'voice_messages', 'recording_status', 'auto_voice_send', 'auto_voice_play',
+        'username_color', 'text_archive_days', 'text_export', 'voice_archive', 'voice_export', 'email_2fa',
     ];
     ?>
     <div class="page-head"><h1>PLANS & PLATFORM</h1>
@@ -205,11 +204,28 @@ function renderAdminPlatformTab(): void {
               <div class="field"><label>Sort Order</label><input type="number" name="plans[<?= $plan['id'] ?>][sort_order]" value="<?= (int)$plan['sort_order'] ?>"></div>
             </div>
             <label class="cb-row"><input type="checkbox" name="plans[<?= $plan['id'] ?>][active]" <?= $plan['active'] ? 'checked' : '' ?>><span>Plan active</span></label>
+            <div style="border:1px solid var(--bd2);border-radius:4px;padding:12px;margin:12px 0">
+              <div class="panel-title" style="margin-bottom:10px">// GROUPS</div>
+              <div class="form-row">
+                <label class="cb-row" style="align-self:center;margin:0">
+                  <input type="checkbox" name="plans[<?= $plan['id'] ?>][features][groups_available]"
+                    <?= !empty($plan['features']['groups_available']) ? 'checked' : '' ?>>
+                  <span><strong>Enable groups for this tier</strong></span>
+                </label>
+                <div class="field">
+                  <label>Maximum People Per Group</label>
+                  <input type="number" min="2" max="100" step="1"
+                    name="plans[<?= $plan['id'] ?>][features][group_member_limit]"
+                    value="<?= max(2, (int)($plan['features']['group_member_limit'] ?? 2)) ?>">
+                  <div class="dim" style="margin-top:5px">Minimum 2, including the group owner. Use the toggle to disable groups; no 0 value is needed.</div>
+                </div>
+              </div>
+            </div>
             <div class="form-row3">
               <?php foreach ($featureKeys as $key): ?>
-                <?php if (in_array($key, ['group_member_limit','text_archive_days'], true)): ?>
+                <?php if ($key === 'text_archive_days'): ?>
                   <div class="field"><label><?= esc(adminFeatureLabel($key)) ?></label><input type="number"
-                    min="<?= $key==='text_archive_days' ? 30 : 2 ?>"
+                    min="30"
                     name="plans[<?= $plan['id'] ?>][features][<?= $key ?>]" value="<?= (int)($plan['features'][$key] ?? 0) ?>"></div>
                 <?php else: ?>
                   <label class="cb-row"><input type="checkbox" name="plans[<?= $plan['id'] ?>][features][<?= $key ?>]"