diff --git a/workplans/RAIL-HO-WP-0013-host-utc-timesyncd.md b/workplans/RAIL-HO-WP-0013-host-utc-timesyncd.md
new file mode 100644
index 0000000..2e6fc48
--- /dev/null
+++ b/workplans/RAIL-HO-WP-0013-host-utc-timesyncd.md
@@ -0,0 +1,34 @@
+---
+id: RAIL-HO-WP-0013
+type: workplan
+title: "Declare systemd-timesyncd as the S1 host UTC daemon"
+domain: financials
+repo: railiance-infra
+status: proposed
+owner: codex
+topic_slug: railiance
+origin: residual
+origin_ref: RCLK-WP-0005
+created: "2026-09-14"
+updated: "2026-09-14"
+related: [RAIL-HO-WP-0011, RCLK-WP-0005, RCLK-WP-0002]
+---
+
+Residual from RCLK-WP-0005-T01. railiance01 already runs a single
+systemd-timesyncd against Ubuntu default NTP, UTC, synchronized. That unit is
+not in S1 IaC. railiance-hosts is superseded; do not duplicate the tree there.
+
+Wait for RCLK-WP-0002's UTC/leap/quality contract before choosing servers or
+holdover. Do not install chrony alongside timesyncd.
+
+## Declare the adopted daemon
+
+```task
+id: RAIL-HO-WP-0013-T01
+status: wait
+priority: medium
+```
+
+Version systemd-timesyncd (not chrony) in railiance-infra: enabled unit,
+NTP/FallbackNTP, restricted listeners, health export. Lint/render only until
+RCLK-WP-0002 and RCLK-WP-0005-T02 authorize live apply. No second daemon.