diff --git a/backend/src/lib/workforce.js b/backend/src/lib/workforce.js
index ce9e710..195e095 100644
--- a/backend/src/lib/workforce.js
+++ b/backend/src/lib/workforce.js
@@ -287,39 +287,41 @@ async function fetchAndSummarise(path) {
   }
 }
 
-// Fetch per-date timesheets for every day in [from, to] and aggregate.
-// Slow (one request per day) but works when the range endpoint returns 404.
+// Fetch per-date timesheets for every day in [from, to] in parallel and aggregate.
+// Uses /api/v2/timesheets/on/{date} when the range endpoint returns 404.
 async function fetchTimesheetsByDay(from, to, locationId) {
   const start = new Date(from + 'T00:00:00')
   const end   = new Date(to   + 'T00:00:00')
-  let baseCost = 0, totalCost = 0, count = 0
-  const byDept = {}
-  const sampleFields = null
 
+  // Build list of all dates in range
+  const dates = []
   let cur = new Date(start)
   while (cur <= end) {
-    const dateStr = cur.toISOString().slice(0, 10)
+    dates.push(cur.toISOString().slice(0, 10))
+    cur.setDate(cur.getDate() + 1)
+  }
+
+  // Fire all days in parallel — ~30 concurrent requests, completes in ~3-5s
+  const perDay = await Promise.all(dates.map(async dateStr => {
     let path = `/api/v2/timesheets/on/${dateStr}?show_costs=true&include_oncosts=true`
     if (locationId) path += `&location_id=${locationId}`
-    try {
-      const items = await wfFetchPaged(path)
-      if (Array.isArray(items)) {
-        for (const s of items) {
-          const base  = parseFloat(s.cost             ?? 0)
-          const total = parseFloat(s.cost_with_oncosts ?? s.cost ?? 0)
-          baseCost  += base
-          totalCost += total
-          count++
-          const deptId   = String(s.department_id ?? 'unknown')
-          const deptName = s.department_name || deptId
-          if (!byDept[deptId]) byDept[deptId] = { name: deptName, baseCost: 0, totalCost: 0, count: 0 }
-          byDept[deptId].baseCost  += base
-          byDept[deptId].totalCost += total
-          byDept[deptId].count++
-        }
-      }
-    } catch { /* ignore per-day errors */ }
-    cur.setDate(cur.getDate() + 1)
+    try { return await wfFetchPaged(path) } catch { return [] }
+  }))
+
+  let baseCost = 0, totalCost = 0, count = 0
+  const byDept = {}
+  for (const items of perDay) {
+    if (!Array.isArray(items)) continue
+    for (const s of items) {
+      const base  = parseFloat(s.cost             ?? 0)
+      const total = parseFloat(s.cost_with_oncosts ?? s.cost ?? 0)
+      baseCost += base; totalCost += total; count++
+      const deptId = String(s.department_id ?? 'unknown')
+      if (!byDept[deptId]) byDept[deptId] = { name: s.department_name || deptId, baseCost: 0, totalCost: 0, count: 0 }
+      byDept[deptId].baseCost  += base
+      byDept[deptId].totalCost += total
+      byDept[deptId].count++
+    }
   }
   const topDepts = Object.entries(byDept)
     .map(([id, v]) => ({ id, name: v.name, baseCost: +v.baseCost.toFixed(2), totalCost: +v.totalCost.toFixed(2), count: v.count }))
diff --git a/backend/src/routes/sync.js b/backend/src/routes/sync.js
index 449a576..2fcccf6 100644
--- a/backend/src/routes/sync.js
+++ b/backend/src/routes/sync.js
@@ -69,7 +69,12 @@ export async function syncRoutes(fastify) {
   // Compare cost totals from all available Workforce endpoints for a date range.
   // Useful for diagnosing figure discrepancies between shifts vs timesheets.
   // Usage: GET /wages/api/sync/compare?from=2025-06-01&to=2025-06-30
-  fastify.get('/api/sync/compare', { preHandler: requireCap('sync') }, async (req, reply) => {
+  fastify.get('/api/sync/compare', {
+    preHandler: requireCap('sync'),
+    config: { rawBody: false },
+    // 120s — allows 30 parallel per-day timesheet calls to complete
+    onRequest: async (req) => { req.socket.setTimeout(120_000) },
+  }, async (req, reply) => {
     const { from, to } = req.query
     if (!from || !to) return reply.status(400).send({ error: 'from and to are required (YYYY-MM-DD)' })
     try {