diff --git a/src/alpine_bits_python/api.py b/src/alpine_bits_python/api.py
index 1679d94..ba533c5 100644
--- a/src/alpine_bits_python/api.py
+++ b/src/alpine_bits_python/api.py
@@ -1,6 +1,7 @@
 import asyncio
 import gzip
 import json
+import multiprocessing
 import os
 import traceback
 import urllib.parse
@@ -181,6 +182,26 @@ async def push_listener(customer: DBCustomer, reservation: DBReservation, hotel)
 async def lifespan(app: FastAPI):
     # Setup DB
 
+    # Determine if this is the primary worker
+    # Only primary runs schedulers/background tasks
+    # In multi-worker setups, only one worker should run singleton services
+    worker_id = os.environ.get("APP_WORKER_ID", "0")
+    is_primary_worker = worker_id == "0"
+
+    # For uvicorn with --workers, detect if we're the main process
+    if not is_primary_worker:
+        # Check if running under uvicorn's supervisor
+        is_primary_worker = (
+            multiprocessing.current_process().name == "MainProcess"
+        )
+
+    _LOGGER.info(
+        "Worker startup: process=%s, pid=%d, primary=%s",
+        multiprocessing.current_process().name,
+        os.getpid(),
+        is_primary_worker,
+    )
+
     try:
         config = load_config()
     except Exception:
@@ -194,8 +215,11 @@ async def lifespan(app: FastAPI):
     email_service = create_email_service(config)
 
     # Setup logging from config with email monitoring
-    email_handler, report_scheduler = setup_logging(config, email_service, loop)
-    _LOGGER.info("Application startup initiated")
+    # Only primary worker should have the report scheduler running
+    email_handler, report_scheduler = setup_logging(
+        config, email_service, loop, enable_scheduler=is_primary_worker
+    )
+    _LOGGER.info("Application startup initiated (primary_worker=%s)", is_primary_worker)
 
     DATABASE_URL = get_database_url(config)
     engine = create_async_engine(DATABASE_URL, echo=False)
@@ -235,18 +259,22 @@ async def lifespan(app: FastAPI):
         await conn.run_sync(Base.metadata.create_all)
     _LOGGER.info("Database tables checked/created at startup.")
 
-    # Hash any existing customers that don't have hashed versions yet
-    async with AsyncSessionLocal() as session:
-        customer_service = CustomerService(session)
-        hashed_count = await customer_service.hash_existing_customers()
-        if hashed_count > 0:
-            _LOGGER.info(
-                "Backfilled hashed data for %d existing customers", hashed_count
-            )
-        else:
-            _LOGGER.info("All existing customers already have hashed data")
+    # Hash any existing customers (only in primary worker to avoid race conditions)
+    if is_primary_worker:
+        async with AsyncSessionLocal() as session:
+            customer_service = CustomerService(session)
+            hashed_count = await customer_service.hash_existing_customers()
+            if hashed_count > 0:
+                _LOGGER.info(
+                    "Backfilled hashed data for %d existing customers", hashed_count
+                )
+            else:
+                _LOGGER.info("All existing customers already have hashed data")
+    else:
+        _LOGGER.info("Skipping customer hashing (non-primary worker)")
 
     # Initialize and hook up stats collector for daily reports
+    # Note: report_scheduler will only exist on the primary worker
     if report_scheduler:
         stats_collector = ReservationStatsCollector(
             async_sessionmaker=AsyncSessionLocal,
@@ -254,7 +282,9 @@ async def lifespan(app: FastAPI):
         )
         # Hook up the stats collector to the report scheduler
         report_scheduler.set_stats_collector(stats_collector.collect_stats)
-        _LOGGER.info("Stats collector initialized and hooked up to report scheduler")
+        _LOGGER.info(
+            "Stats collector initialized and hooked up to report scheduler"
+        )
 
         # Start daily report scheduler
         report_scheduler.start()
diff --git a/src/alpine_bits_python/logging_config.py b/src/alpine_bits_python/logging_config.py
index 252970c..712aae8 100644
--- a/src/alpine_bits_python/logging_config.py
+++ b/src/alpine_bits_python/logging_config.py
@@ -19,6 +19,7 @@ def setup_logging(
     config: dict | None = None,
     email_service: "EmailService | None" = None,
     loop: asyncio.AbstractEventLoop | None = None,
+    enable_scheduler: bool = True,
 ) -> tuple["EmailAlertHandler | None", "DailyReportScheduler | None"]:
     """Configure logging based on application config.
 
@@ -26,6 +27,8 @@ def setup_logging(
         config: Application configuration dict with optional 'logger' section
         email_service: Optional email service for email alerts
         loop: Optional asyncio event loop for email alerts
+        enable_scheduler: Whether to enable the daily report scheduler
+                         (should be False for non-primary workers)
 
     Returns:
         Tuple of (email_alert_handler, daily_report_scheduler) if email monitoring
@@ -109,9 +112,9 @@ def setup_logging(
             except Exception:
                 root_logger.exception("Failed to setup email alert handler")
 
-        # Setup daily report scheduler
+        # Setup daily report scheduler (only if enabled and this is primary worker)
         daily_report_config = monitoring_config.get("daily_report", {})
-        if daily_report_config.get("enabled", False):
+        if daily_report_config.get("enabled", False) and enable_scheduler:
             try:
                 # Import here to avoid circular dependencies
                 from alpine_bits_python.email_monitoring import DailyReportScheduler
@@ -120,9 +123,13 @@ def setup_logging(
                     email_service=email_service,
                     config=daily_report_config,
                 )
-                root_logger.info("Daily report scheduler configured")
+                root_logger.info("Daily report scheduler configured (primary worker)")
             except Exception:
                 root_logger.exception("Failed to setup daily report scheduler")
+        elif daily_report_config.get("enabled", False) and not enable_scheduler:
+            root_logger.info(
+                "Daily report scheduler disabled (non-primary worker)"
+            )
 
     return email_handler, report_scheduler