diff --git a/app.py b/app.py
index c1d8042..6772a2c 100644
--- a/app.py
+++ b/app.py
@@ -487,8 +487,10 @@ def admin():
         ipr_balance = iproyal.get_balance()
     except Exception:
         ipr_balance = "unavailable"
+    low_balance = isinstance(ipr_balance, (int, float)) and \
+        ipr_balance < CFG.get("alerts", {}).get("low_balance_threshold", 10.0)
     return render_template("admin.html", stats=stats, users=users, orders=orders,
-                           dedicated=deds, ipr_balance=ipr_balance)
+                           dedicated=deds, ipr_balance=ipr_balance, low_balance=low_balance)
 
 
 @app.route("/admin/credit", methods=["POST"])
diff --git a/monitor.py b/monitor.py
new file mode 100644
index 0000000..721be8d
--- /dev/null
+++ b/monitor.py
@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+"""Monitor IPRoyal reseller balance. Prints an ALERT line (for cron -> Telegram)
+when below threshold. Exit 0 = OK, 1 = low/failed."""
+import sys
+
+import iproyal
+
+threshold = iproyal.CFG.get("alerts", {}).get("low_balance_threshold", 10.0)
+
+try:
+    bal = iproyal.get_balance()
+except Exception as e:
+    print(f"ALERT: IPRoyal balance check FAILED: {e}")
+    sys.exit(1)
+
+if isinstance(bal, (int, float)) and bal < threshold:
+    print(f"ALERT: IPRoyal reseller balance ${bal:.2f} is below ${threshold:.2f}. Top up now.")
+    sys.exit(1)
+
+print(f"OK: IPRoyal balance ${bal}")
+sys.exit(0)
diff --git a/sweep.py b/sweep.py
new file mode 100644
index 0000000..3b1efa1
--- /dev/null
+++ b/sweep.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+"""Auto-top-up (sweep): send BTC to IPRoyal when reseller balance is low.
+
+SAFETY: DRY-RUN by default — prints what it *would* do, never moves money.
+To go live you must:
+  1. set sweep.iproyal_btc_address in config.json (IPRoyal's BTC deposit address),
+  2. wire the send() function to your source wallet (BTCPay hot wallet / Alby),
+  3. pass --live, with a hard cap via --cap-sats.
+"""
+import argparse
+import sys
+
+import iproyal
+
+
+def main():
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--live", action="store_true", help="actually send (default: dry-run)")
+    ap.add_argument("--cap-sats", type=int, default=0, help="hard cap on sats to send")
+    args = ap.parse_args()
+
+    cfg = iproyal.CFG.get("sweep", {})
+    threshold = iproyal.CFG.get("alerts", {}).get("low_balance_threshold", 10.0)
+    max_sats = args.cap_sats or int(cfg.get("max_sats", 100000))
+    dest = cfg.get("iproyal_btc_address", "")
+
+    try:
+        bal = iproyal.get_balance()
+    except Exception as e:
+        print(f"balance check failed: {e}")
+        sys.exit(1)
+
+    if bal >= threshold:
+        print(f"balance ${bal} >= threshold ${threshold} — no top-up needed")
+        return
+
+    if not dest:
+        print("NO destination set (sweep.iproyal_btc_address). "
+              "Set it in config.json before going live.")
+        return
+
+    if args.live:
+        print(f"LIVE: balance ${bal} < ${threshold} — would send {max_sats} sats to {dest}")
+        # TODO: wire send() to source wallet (BTCPay hot wallet / Alby on-chain).
+        # Hard cap enforced here: never exceed max_sats.
+        print("WARNING: send() not yet wired — this is a no-op placeholder.")
+    else:
+        print(f"DRY-RUN: balance ${bal} < ${threshold} — would top up {max_sats} sats to {dest}")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/templates/admin.html b/templates/admin.html
index fa9e21f..0fabce1 100644
--- a/templates/admin.html
+++ b/templates/admin.html
@@ -1,6 +1,11 @@
 {% extends "base.html" %}
 {% block body %}
 <h2>Admin</h2>
+{% if low_balance %}
+<div class="flash warn" style="font-size:15px;border-color:var(--danger);color:var(--danger);background:rgba(255,77,109,.08)">
+  ⚠️ IPRoyal balance LOW (${{ ipr_balance }}) — top up now or dedicated orders will fail.
+</div>
+{% endif %}
 <div class="stats-row">
   <div class="card stat"><span class="lbl">Revenue (paid)</span><span class="val">{{ stats.revenue_sats }} sats</span></div>
   <div class="card stat"><span class="lbl">IPRoyal balance</span><span class="val">${{ ipr_balance }}</span></div>