diff --git a/core/data/alembic/versions/d478fe5b757f_billing_add_timestamps.py b/core/data/alembic/versions/d478fe5b757f_billing_add_timestamps.py
new file mode 100644
index 0000000..0b618e5
--- /dev/null
+++ b/core/data/alembic/versions/d478fe5b757f_billing_add_timestamps.py
@@ -0,0 +1,36 @@
+"""billing_add_timestamps
+
+Revision ID: d478fe5b757f
+Revises: 63f1fc2e334c
+Create Date: 2026-07-10 16:36:08.502358
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision = 'd478fe5b757f'
+down_revision = '63f1fc2e334c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('machine_billing_charge', sa.Column('ins_datetime', sa.TIMESTAMP(), server_default=sa.text('now()'), nullable=False))
+    op.add_column('machine_billing_credit', sa.Column('ins_datetime', sa.TIMESTAMP(), server_default=sa.text('now()'), nullable=False))
+    op.add_column('machine_billing_credit', sa.Column('upd_datetime', sa.TIMESTAMP(), server_default=sa.text('now()'), nullable=False))
+    op.add_column('machine_billing_playcount', sa.Column('ins_datetime', sa.TIMESTAMP(), server_default=sa.text('now()'), nullable=False))
+    op.add_column('machine_billing_playcount', sa.Column('upd_datetime', sa.TIMESTAMP(), server_default=sa.text('now()'), nullable=False))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('machine_billing_playcount', 'upd_datetime')
+    op.drop_column('machine_billing_playcount', 'ins_datetime ')
+    op.drop_column('machine_billing_credit', 'upd_datetime')
+    op.drop_column('machine_billing_credit', 'ins_datetime ')
+    op.drop_column('machine_billing_charge', 'ins_datetime ')
+    # ### end Alembic commands ###
diff --git a/core/data/schema/arcade.py b/core/data/schema/arcade.py
index f10f4cc..5baf2c3 100644
--- a/core/data/schema/arcade.py
+++ b/core/data/schema/arcade.py
@@ -7,7 +7,7 @@ from sqlalchemy.dialects.mysql import insert
 from sqlalchemy.engine import Row
 from sqlalchemy.sql import func, select
 from sqlalchemy.sql.schema import ForeignKey, PrimaryKeyConstraint
-from sqlalchemy.types import JSON, Boolean, Integer, String, BIGINT, INTEGER, CHAR, FLOAT, VARCHAR
+from sqlalchemy.types import JSON, Boolean, Integer, String, BIGINT, INTEGER, CHAR, FLOAT, VARCHAR, TIMESTAMP
 
 from core.data.schema.base import BaseData, metadata
 
@@ -99,6 +99,7 @@ billing_charge: Table = Table(
     Column("product_count", INTEGER, nullable=False),
     Column("func_type", INTEGER, nullable=False),
     Column("player_number", INTEGER, nullable=False),
+    Column("ins_datetime", TIMESTAMP, nullable=False, server_default=func.now()),
     mysql_charset="utf8mb4",
 )
 
@@ -130,6 +131,8 @@ billing_credit: Table = Table(
     Column("coin_count_slot5", INTEGER, nullable=False),
     Column("coin_count_slot6", INTEGER, nullable=False),
     Column("coin_count_slot7", INTEGER, nullable=False),
+    Column("ins_datetime", TIMESTAMP, nullable=False, server_default=func.now()),
+    Column("upd_datetime", TIMESTAMP, nullable=False, server_default=func.now(), onupdate=func.now()),
     UniqueConstraint("machine", "game_id", name="machine_billing_credit_uk"),
     mysql_charset="utf8mb4",
 )
@@ -148,6 +151,8 @@ billing_playct: Table = Table(
     Column("year", INTEGER, nullable=False),
     Column("month", INTEGER, nullable=False),
     Column("playct", BIGINT, nullable=False, server_default="1"),
+    Column("ins_datetime", TIMESTAMP, nullable=False, server_default=func.now()),
+    Column("upd_datetime", TIMESTAMP, nullable=False, server_default=func.now(), onupdate=func.now()),
     UniqueConstraint("machine", "game_id", "year", "month", name="machine_billing_playcount_uk"),
     mysql_charset="utf8mb4",
 )
@@ -494,6 +499,7 @@ class ArcadeData(BaseData):
             coin_count_slot5=coin_count_slot5,
             coin_count_slot6=coin_count_slot6,
             coin_count_slot7=coin_count_slot7,
+            upd_datetime=datetime.now()
         )
         
         result = await self.execute(conflict)
@@ -519,7 +525,10 @@ class ArcadeData(BaseData):
             playct=playct
         )
 
-        conflict = sql.on_duplicate_key_update(playct=billing_playct.c.playct + playct)
+        conflict = sql.on_duplicate_key_update(
+            playct=billing_playct.c.playct + playct,
+            upd_datetime=datetime.now()
+        )
         result = await self.execute(conflict)
 
         if result is None: