diff --git a/packages/api/src/router/staffing-best-project-resource.ts b/packages/api/src/router/staffing-best-project-resource.ts
index bcaae6e..956336b 100644
--- a/packages/api/src/router/staffing-best-project-resource.ts
+++ b/packages/api/src/router/staffing-best-project-resource.ts
@@ -1,21 +1,11 @@
 import { PermissionKey, type WeekdayAvailability } from "@capakraken/shared";
 import { z } from "zod";
 import { findUniqueOrThrow } from "../db/helpers.js";
-import {
-  calculateEffectiveAvailableHours,
-  calculateEffectiveBookedHours,
-  countEffectiveWorkingDays,
-  loadResourceDailyAvailabilityContexts,
-} from "../lib/resource-capacity.js";
+import { calculateEffectiveBookedHours, loadResourceDailyAvailabilityContexts } from "../lib/resource-capacity.js";
 import { fmtEur } from "../lib/format-utils.js";
 import { planningReadProcedure, requirePermission } from "../trpc.js";
-import {
-  averagePerWorkingDay,
-  createDateRange,
-  getBaseDayAvailability,
-  round1,
-  toIsoDate,
-} from "./staffing-shared.js";
+import { createDateRange, round1, toIsoDate } from "./staffing-shared.js";
+import { buildResourceCapacitySummary } from "./staffing-capacity-summary.js";
 
 type BestProjectResourceRankingMode =
   | "lowest_lcr"
@@ -194,44 +184,14 @@ async function queryBestProjectResource(
   const candidates = resources.map((resource) => {
     const availability = resource.availability as unknown as WeekdayAvailability;
     const context = contexts.get(resource.id);
-    const baseWorkingDays = countEffectiveWorkingDays({
-      availability,
-      periodStart: input.startDate,
-      periodEnd: input.endDate,
-      context: undefined,
-    });
-    const workingDays = countEffectiveWorkingDays({
-      availability,
-      periodStart: input.startDate,
-      periodEnd: input.endDate,
-      context,
-    });
-    const baseAvailableHours = calculateEffectiveAvailableHours({
-      availability,
-      periodStart: input.startDate,
-      periodEnd: input.endDate,
-      context: undefined,
-    });
-    const availableHours = calculateEffectiveAvailableHours({
-      availability,
-      periodStart: input.startDate,
-      periodEnd: input.endDate,
-      context,
-    });
     const assignments = assignmentsByResourceId.get(resource.id) ?? [];
-    const bookedHours = assignments.reduce(
-      (sum, assignment) =>
-        sum + calculateEffectiveBookedHours({
-          availability,
-          startDate: assignment.startDate,
-          endDate: assignment.endDate,
-          hoursPerDay: assignment.hoursPerDay,
-          periodStart: input.startDate,
-          periodEnd: input.endDate,
-          context,
-        }),
-      0,
-    );
+    const capacity = buildResourceCapacitySummary({
+      availability,
+      periodStart: input.startDate,
+      periodEnd: input.endDate,
+      context,
+      bookings: assignments,
+    });
     const projectHours = (assignmentsOnProjectByResourceId.get(resource.id) ?? []).reduce(
       (sum, assignment) =>
         sum + calculateEffectiveBookedHours({
@@ -245,29 +205,6 @@ async function queryBestProjectResource(
         }),
       0,
     );
-    let excludedCapacityDays = 0;
-    for (const fraction of context?.absenceFractionsByDate.values() ?? []) {
-      excludedCapacityDays += fraction;
-    }
-    const holidayWorkdayCount = [...(context?.holidayDates ?? new Set<string>())].reduce((count, isoDate) => (
-      count + (getBaseDayAvailability(availability, new Date(`${isoDate}T00:00:00.000Z`)) > 0 ? 1 : 0)
-    ), 0);
-    const holidayHoursDeduction = [...(context?.holidayDates ?? new Set<string>())].reduce((sum, isoDate) => (
-      sum + getBaseDayAvailability(availability, new Date(`${isoDate}T00:00:00.000Z`))
-    ), 0);
-    let absenceDayEquivalent = 0;
-    let absenceHoursDeduction = 0;
-    for (const [isoDate, fraction] of context?.vacationFractionsByDate ?? []) {
-      const dayHours = getBaseDayAvailability(availability, new Date(`${isoDate}T00:00:00.000Z`));
-      if (dayHours <= 0 || context?.holidayDates.has(isoDate)) {
-        continue;
-      }
-      absenceDayEquivalent += fraction;
-      absenceHoursDeduction += dayHours * fraction;
-    }
-
-    const remainingHours = Math.max(0, availableHours - bookedHours);
-    const remainingHoursPerDay = averagePerWorkingDay(remainingHours, workingDays);
 
     return {
       id: resource.id,
@@ -281,33 +218,27 @@ async function queryBestProjectResource(
       metroCity: resource.metroCity?.name ?? null,
       lcrCents: resource.lcrCents ?? null,
       lcr: resource.lcrCents != null ? fmtEur(resource.lcrCents) : null,
-      baseWorkingDays: round1(baseWorkingDays),
-      workingDays,
-      excludedCapacityDays: round1(excludedCapacityDays),
-      baseAvailableHours: round1(baseAvailableHours),
-      availableHours: round1(availableHours),
-      bookedHours: round1(bookedHours),
-      remainingHours: round1(remainingHours),
-      remainingHoursPerDay,
+      baseWorkingDays: capacity.baseWorkingDays,
+      workingDays: capacity.workingDays,
+      excludedCapacityDays: capacity.excludedCapacityDays,
+      baseAvailableHours: capacity.baseAvailableHours,
+      availableHours: capacity.availableHours,
+      bookedHours: capacity.bookedHours,
+      remainingHours: capacity.remainingHours,
+      remainingHoursPerDay: capacity.remainingHoursPerDay,
       projectHours: round1(projectHours),
       assignmentCount: assignments.length,
       holidaySummary: {
-        count: context?.holidayDates.size ?? 0,
-        workdayCount: holidayWorkdayCount,
-        hoursDeduction: round1(holidayHoursDeduction),
-        holidayDates: [...(context?.holidayDates ?? new Set<string>())].sort(),
+        count: capacity.holidaySummary.count,
+        workdayCount: capacity.holidaySummary.workdayCount,
+        hoursDeduction: capacity.holidaySummary.hoursDeduction,
+        holidayDates: capacity.holidaySummary.holidayDates,
       },
       absenceSummary: {
-        dayEquivalent: round1(absenceDayEquivalent),
-        hoursDeduction: round1(absenceHoursDeduction),
-      },
-      capacityBreakdown: {
-        formula: "baseAvailableHours - holidayHoursDeduction - absenceHoursDeduction = availableHours",
-        baseAvailableHours: round1(baseAvailableHours),
-        holidayHoursDeduction: round1(holidayHoursDeduction),
-        absenceHoursDeduction: round1(absenceHoursDeduction),
-        availableHours: round1(availableHours),
+        dayEquivalent: capacity.absenceSummary.dayEquivalent,
+        hoursDeduction: capacity.absenceSummary.hoursDeduction,
       },
+      capacityBreakdown: capacity.capacityBreakdown,
     };
   }).filter((candidate) => candidate.remainingHoursPerDay >= input.minHoursPerDay);
 
diff --git a/packages/api/src/router/staffing-capacity-summary.ts b/packages/api/src/router/staffing-capacity-summary.ts
new file mode 100644
index 0000000..e3d78df
--- /dev/null
+++ b/packages/api/src/router/staffing-capacity-summary.ts
@@ -0,0 +1,131 @@
+import { type WeekdayAvailability } from "@capakraken/shared";
+import {
+  calculateEffectiveAvailableHours,
+  calculateEffectiveBookedHours,
+  countEffectiveWorkingDays,
+  type ResourceDailyAvailabilityContext,
+} from "../lib/resource-capacity.js";
+import { averagePerWorkingDay, getBaseDayAvailability, round1 } from "./staffing-shared.js";
+
+type CapacityBooking = {
+  startDate: Date;
+  endDate: Date;
+  hoursPerDay: number;
+};
+
+export function summarizeHolidayAndAbsenceCapacity(input: {
+  availability: WeekdayAvailability;
+  context: ResourceDailyAvailabilityContext | undefined;
+}) {
+  const holidayDates = [...(input.context?.holidayDates ?? new Set<string>())].sort();
+  const holidayWorkdayCount = holidayDates.reduce((count, isoDate) => (
+    count + (getBaseDayAvailability(input.availability, new Date(`${isoDate}T00:00:00.000Z`)) > 0 ? 1 : 0)
+  ), 0);
+  const holidayHoursDeduction = holidayDates.reduce((sum, isoDate) => (
+    sum + getBaseDayAvailability(input.availability, new Date(`${isoDate}T00:00:00.000Z`))
+  ), 0);
+
+  let excludedCapacityDays = 0;
+  for (const fraction of input.context?.absenceFractionsByDate.values() ?? []) {
+    excludedCapacityDays += fraction;
+  }
+
+  let absenceDayEquivalent = 0;
+  let absenceHoursDeduction = 0;
+  for (const [isoDate, fraction] of input.context?.vacationFractionsByDate ?? []) {
+    const dayHours = getBaseDayAvailability(input.availability, new Date(`${isoDate}T00:00:00.000Z`));
+    if (dayHours <= 0 || input.context?.holidayDates.has(isoDate)) {
+      continue;
+    }
+    absenceDayEquivalent += fraction;
+    absenceHoursDeduction += dayHours * fraction;
+  }
+
+  return {
+    excludedCapacityDays: round1(excludedCapacityDays),
+    holidayDates,
+    holidayWorkdayCount,
+    holidayHoursDeduction: round1(holidayHoursDeduction),
+    absenceDayEquivalent: round1(absenceDayEquivalent),
+    absenceHoursDeduction: round1(absenceHoursDeduction),
+  };
+}
+
+export function buildResourceCapacitySummary(input: {
+  availability: WeekdayAvailability;
+  periodStart: Date;
+  periodEnd: Date;
+  context: ResourceDailyAvailabilityContext | undefined;
+  bookings?: CapacityBooking[] | undefined;
+}) {
+  const baseWorkingDays = countEffectiveWorkingDays({
+    availability: input.availability,
+    periodStart: input.periodStart,
+    periodEnd: input.periodEnd,
+    context: undefined,
+  });
+  const workingDays = countEffectiveWorkingDays({
+    availability: input.availability,
+    periodStart: input.periodStart,
+    periodEnd: input.periodEnd,
+    context: input.context,
+  });
+  const baseAvailableHours = calculateEffectiveAvailableHours({
+    availability: input.availability,
+    periodStart: input.periodStart,
+    periodEnd: input.periodEnd,
+    context: undefined,
+  });
+  const availableHours = calculateEffectiveAvailableHours({
+    availability: input.availability,
+    periodStart: input.periodStart,
+    periodEnd: input.periodEnd,
+    context: input.context,
+  });
+  const bookedHours = (input.bookings ?? []).reduce(
+    (sum, booking) =>
+      sum + calculateEffectiveBookedHours({
+        availability: input.availability,
+        startDate: booking.startDate,
+        endDate: booking.endDate,
+        hoursPerDay: booking.hoursPerDay,
+        periodStart: input.periodStart,
+        periodEnd: input.periodEnd,
+        context: input.context,
+      }),
+    0,
+  );
+  const remainingHours = Math.max(0, availableHours - bookedHours);
+  const holidayAndAbsence = summarizeHolidayAndAbsenceCapacity({
+    availability: input.availability,
+    context: input.context,
+  });
+
+  return {
+    baseWorkingDays: round1(baseWorkingDays),
+    workingDays: round1(workingDays),
+    baseAvailableHours: round1(baseAvailableHours),
+    availableHours: round1(availableHours),
+    bookedHours: round1(bookedHours),
+    remainingHours: round1(remainingHours),
+    remainingHoursPerDay: averagePerWorkingDay(remainingHours, workingDays),
+    holidaySummary: {
+      count: holidayAndAbsence.holidayDates.length,
+      workdayCount: holidayAndAbsence.holidayWorkdayCount,
+      hoursDeduction: holidayAndAbsence.holidayHoursDeduction,
+      holidayDates: holidayAndAbsence.holidayDates,
+    },
+    absenceSummary: {
+      dayEquivalent: holidayAndAbsence.absenceDayEquivalent,
+      hoursDeduction: holidayAndAbsence.absenceHoursDeduction,
+    },
+    excludedCapacityDays: holidayAndAbsence.excludedCapacityDays,
+    capacityBreakdown: {
+      formula: "baseAvailableHours - holidayHoursDeduction - absenceHoursDeduction = availableHours",
+      baseAvailableHours: round1(baseAvailableHours),
+      holidayHoursDeduction: holidayAndAbsence.holidayHoursDeduction,
+      absenceHoursDeduction: holidayAndAbsence.absenceHoursDeduction,
+      availableHours: round1(availableHours),
+    },
+  };
+}
diff --git a/packages/api/src/router/staffing-suggestions-read.ts b/packages/api/src/router/staffing-suggestions-read.ts
index 4c0401f..b86443d 100644
--- a/packages/api/src/router/staffing-suggestions-read.ts
+++ b/packages/api/src/router/staffing-suggestions-read.ts
@@ -3,17 +3,11 @@ import { listAssignmentBookings } from "@capakraken/application";
 import { PermissionKey, type WeekdayAvailability } from "@capakraken/shared";
 import { z } from "zod";
 import { findUniqueOrThrow } from "../db/helpers.js";
-import {
-  calculateEffectiveAvailableHours,
-  calculateEffectiveBookedHours,
-  countEffectiveWorkingDays,
-  loadResourceDailyAvailabilityContexts,
-} from "../lib/resource-capacity.js";
+import { loadResourceDailyAvailabilityContexts } from "../lib/resource-capacity.js";
 import { fmtEur } from "../lib/format-utils.js";
 import { planningReadProcedure, requirePermission } from "../trpc.js";
 import {
   ACTIVE_STATUSES,
-  averagePerWorkingDay,
   calculateAllocatedHoursForDay,
   createLocationLabel,
   getBaseDayAvailability,
@@ -21,6 +15,7 @@ import {
   round1,
   toIsoDate,
 } from "./staffing-shared.js";
+import { buildResourceCapacitySummary } from "./staffing-capacity-summary.js";
 
 function fmtDate(value: Date | null | undefined): string | null {
   return value ? value.toISOString().slice(0, 10) : null;
@@ -143,60 +138,13 @@ async function queryStaffingSuggestions(
     const context = contexts.get(resource.id);
     const resourceBookings = bookingsByResourceId.get(resource.id) ?? [];
     const activeBookings = resourceBookings.filter((booking) => ACTIVE_STATUSES.has(booking.status));
-    const baseAvailableHours = calculateEffectiveAvailableHours({
-      availability,
-      periodStart: startDate,
-      periodEnd: endDate,
-      context: undefined,
-    });
-    const totalAvailableHours = calculateEffectiveAvailableHours({
+    const capacity = buildResourceCapacitySummary({
       availability,
       periodStart: startDate,
       periodEnd: endDate,
       context,
+      bookings: activeBookings,
     });
-    const baseWorkingDays = countEffectiveWorkingDays({
-      availability,
-      periodStart: startDate,
-      periodEnd: endDate,
-      context: undefined,
-    });
-    const effectiveWorkingDays = countEffectiveWorkingDays({
-      availability,
-      periodStart: startDate,
-      periodEnd: endDate,
-      context,
-    });
-    const allocatedHours = activeBookings.reduce(
-      (sum, booking) =>
-        sum + calculateEffectiveBookedHours({
-          availability,
-          startDate: booking.startDate,
-          endDate: booking.endDate,
-          hoursPerDay: booking.hoursPerDay,
-          periodStart: startDate,
-          periodEnd: endDate,
-          context,
-        }),
-      0,
-    );
-    const holidayDates = [...(context?.holidayDates ?? new Set<string>())].sort();
-    const holidayWorkdayCount = holidayDates.reduce((count, isoDate) => (
-      count + (getBaseDayAvailability(availability, new Date(`${isoDate}T00:00:00.000Z`)) > 0 ? 1 : 0)
-    ), 0);
-    const holidayHoursDeduction = holidayDates.reduce((sum, isoDate) => (
-      sum + getBaseDayAvailability(availability, new Date(`${isoDate}T00:00:00.000Z`))
-    ), 0);
-    let absenceDayEquivalent = 0;
-    let absenceHoursDeduction = 0;
-    for (const [isoDate, fraction] of context?.vacationFractionsByDate ?? []) {
-      const dayHours = getBaseDayAvailability(availability, new Date(`${isoDate}T00:00:00.000Z`));
-      if (dayHours <= 0 || context?.holidayDates.has(isoDate)) {
-        continue;
-      }
-      absenceDayEquivalent += fraction;
-      absenceHoursDeduction += dayHours * fraction;
-    }
     const conflictDays: string[] = [];
     const conflictDetails: Array<{
       date: string;
@@ -247,11 +195,12 @@ async function queryStaffingSuggestions(
       cursor.setUTCDate(cursor.getUTCDate() + 1);
     }
 
-    const remainingHours = Math.max(0, totalAvailableHours - allocatedHours);
-    const remainingHoursPerDay = averagePerWorkingDay(remainingHours, effectiveWorkingDays);
+    const allocatedHours = capacity.bookedHours;
+    const remainingHours = capacity.remainingHours;
+    const remainingHoursPerDay = capacity.remainingHoursPerDay;
     const utilizationPercent =
-      totalAvailableHours > 0
-        ? Math.min(100, (allocatedHours / totalAvailableHours) * 100)
+      capacity.availableHours > 0
+        ? Math.min(100, (allocatedHours / capacity.availableHours) * 100)
         : 0;
     type SkillRow = { skill: string; category?: string; proficiency: number; isMainSkill?: boolean };
     let skills = resource.skills as unknown as SkillRow[];
@@ -293,19 +242,19 @@ async function queryStaffingSuggestions(
         },
         capacity: {
           requestedHoursPerDay: round1(hoursPerDay),
-          requestedHoursTotal: round1(effectiveWorkingDays * hoursPerDay),
-          baseWorkingDays: round1(baseWorkingDays),
-          effectiveWorkingDays: round1(effectiveWorkingDays),
-          baseAvailableHours: round1(baseAvailableHours),
-          effectiveAvailableHours: round1(totalAvailableHours),
-          bookedHours: round1(allocatedHours),
-          remainingHours: round1(remainingHours),
+          requestedHoursTotal: round1(capacity.workingDays * hoursPerDay),
+          baseWorkingDays: capacity.baseWorkingDays,
+          effectiveWorkingDays: capacity.workingDays,
+          baseAvailableHours: capacity.baseAvailableHours,
+          effectiveAvailableHours: capacity.availableHours,
+          bookedHours: capacity.bookedHours,
+          remainingHours: capacity.remainingHours,
           remainingHoursPerDay,
-          holidayCount: holidayDates.length,
-          holidayWorkdayCount,
-          holidayHoursDeduction: round1(holidayHoursDeduction),
-          absenceDayEquivalent: round1(absenceDayEquivalent),
-          absenceHoursDeduction: round1(absenceHoursDeduction),
+          holidayCount: capacity.holidaySummary.count,
+          holidayWorkdayCount: capacity.holidaySummary.workdayCount,
+          holidayHoursDeduction: capacity.holidaySummary.hoursDeduction,
+          absenceDayEquivalent: capacity.absenceSummary.dayEquivalent,
+          absenceHoursDeduction: capacity.absenceSummary.hoursDeduction,
         },
         conflicts: {
           count: conflictDays.length,