diff --git a/doc/functional-rules.md b/doc/functional-rules.md
index a15f719..0f3d26b 100644
--- a/doc/functional-rules.md
+++ b/doc/functional-rules.md
@@ -245,7 +245,7 @@ Tous les filtres checkbox sont cochés par défaut à l'ouverture du drawer.
       - pour `FORFAIT`:
         - pris: basé sur toutes les absences (demi-journées incluses)
         - restants = acquis - pris (borné à 0)
-        - paiement congés N-1: saisie RH via `PATCH /employees/{id}/paid-leave-days` (body: `paidLeaveDays`, `year`). Stocké dans `employee_leave_balances.paid_leave_days`. Les jours payés sont soustraits du reste à prendre N-1 (`previousYearRemainingDays = max(0, acquis_N-1 - pris_N-1 - payés)`). Uniquement pour les contrats forfait.
+        - paiement congés N-1: saisie RH via `PATCH /employees/{id}/paid-leave-days` (body: `paidLeaveDays`, `year`). Stocké dans `employee_leave_balances.paid_leave_days`. Les jours payés réduisent le stock N-1 **avant** l'attribution des jours pris : `disponible_N-1 = max(0, acquis_N-1 - payés)`, puis `pris_N-1 = min(disponible_N-1, total_pris)`, surplus pris basculé sur N. Reste à prendre N-1 = `max(0, disponible_N-1 - pris_N-1)`. Uniquement pour les contrats forfait.
       - report annuel:
         - le reliquat (`restants`) de l'exercice précédent est reporté dans les acquis de l'exercice courant
         - pour `CDI`/`CDD` non forfait: report séparé jours + samedis
@@ -275,8 +275,9 @@ Tous les filtres checkbox sont cochés par défaut à l'ouverture du drawer.
       - total mensuel des minutes de récupération
       - compteur global exercice = `report N-1 + acquis N`
     - attribution mensuelle des semaines:
-      - une semaine ISO est affichée une seule fois, dans le mois qui contient le **samedi** de cette semaine
-      - si le weekend tombe en début de mois suivant, c'est le mois suivant qui porte la semaine
+      - une semaine ISO qui chevauche deux mois est affichée dans **les deux mois**, avec les valeurs réparties proportionnellement aux minutes travaillées de chaque portion
+      - le calcul des heures supplémentaires reste hebdomadaire (seuils 35h/39h/43h appliqués sur la semaine entière), seul l'affichage est scindé
+      - exemple: S14 lundi-mardi en mars, mercredi-dimanche en avril → la S14 apparaît en mars (avec la part des heures de lun-mar) et en avril (avec la part mer-dim)
     - logique de calcul:
       - base identique aux calculs d'heures supplémentaires de la vue semaine Heures
       - minutes de récupération hebdomadaires = `HS totales + bonus 25% + bonus 50%`
diff --git a/doc/rtt-rollover.md b/doc/rtt-rollover.md
index 3c3792f..3beaa64 100644
--- a/doc/rtt-rollover.md
+++ b/doc/rtt-rollover.md
@@ -32,9 +32,9 @@ Principe:
 
 ## 4) Attribution mensuelle des semaines
 
-- une semaine ISO est affichee une seule fois, dans le mois qui contient le **samedi** de cette semaine
-- si le weekend tombe en debut du mois suivant, c'est ce mois qui porte la semaine
-- pas de prorata: la totalite des minutes de recuperation de la semaine est comptee dans un seul mois
+- une semaine ISO qui chevauche deux mois est affichee dans **les deux mois**, avec les valeurs reparties proportionnellement aux minutes travaillees de chaque portion
+- le calcul des heures supplementaires reste hebdomadaire (seuils 35h/39h/43h appliques sur la semaine entiere), seul l'affichage est scinde
+- exemple: S14 lundi-mardi en mars, mercredi-dimanche en avril → la S14 apparait en mars (part lun-mar) et en avril (part mer-dim)
 
 ## 5) Table cible
 
diff --git a/frontend/pages/audit-logs.vue b/frontend/pages/audit-logs.vue
index 44c433d..983ba93 100644
--- a/frontend/pages/audit-logs.vue
+++ b/frontend/pages/audit-logs.vue
@@ -44,6 +44,7 @@
           <option value="contract_suspension">Suspension</option>
           <option value="rtt_payment">Paiement RTT</option>
           <option value="fractioned_days">Jours fractionnés</option>
+          <option value="paid_leave_days">Congés N-1 payés</option>
         </select>
       </div>
       <button
@@ -241,6 +242,7 @@ const entityTypeLabel = (type: string): string => {
     contract_suspension: 'Suspension',
     rtt_payment: 'RTT',
     fractioned_days: 'Fract.',
+    paid_leave_days: 'Congés payés',
   }
   return map[type] ?? type
 }
diff --git a/src/Dto/Rtt/WeekRecoveryDetail.php b/src/Dto/Rtt/WeekRecoveryDetail.php
index 03765da..8254a2a 100644
--- a/src/Dto/Rtt/WeekRecoveryDetail.php
+++ b/src/Dto/Rtt/WeekRecoveryDetail.php
@@ -6,6 +6,9 @@ namespace App\Dto\Rtt;
 
 final class WeekRecoveryDetail
 {
+    /**
+     * @param array<string, int> $dailyMinutes date (Y-m-d) => worked minutes
+     */
     public function __construct(
         public int $overtimeMinutes = 0,
         public int $base25Minutes = 0,
@@ -13,5 +16,6 @@ final class WeekRecoveryDetail
         public int $base50Minutes = 0,
         public int $bonus50Minutes = 0,
         public int $totalMinutes = 0,
+        public array $dailyMinutes = [],
     ) {}
 }
diff --git a/src/Service/Rtt/RttRecoveryComputationService.php b/src/Service/Rtt/RttRecoveryComputationService.php
index 094ba3b..ecf026c 100644
--- a/src/Service/Rtt/RttRecoveryComputationService.php
+++ b/src/Service/Rtt/RttRecoveryComputationService.php
@@ -46,7 +46,7 @@ final readonly class RttRecoveryComputationService
     }
 
     /**
-     * @return list<array{month:int,weekNumber:int,start:DateTimeImmutable,end:DateTimeImmutable}>
+     * @return list<array{weekNumber:int,start:DateTimeImmutable,end:DateTimeImmutable}>
      */
     public function buildWeeksForExercise(DateTimeImmutable $from, DateTimeImmutable $to): array
     {
@@ -61,10 +61,7 @@ final readonly class RttRecoveryComputationService
             $effectiveEnd   = $end > $to ? $to : $end;
 
             if ($effectiveEnd >= $effectiveStart) {
-                $saturday    = $start->modify('+5 days');
-                $monthAnchor = $saturday < $from ? $from : ($saturday > $to ? $to : $saturday);
-                $weeks[]     = [
-                    'month'      => (int) $monthAnchor->format('n'),
+                $weeks[] = [
                     'weekNumber' => (int) $effectiveStart->format('W'),
                     'start'      => $start,
                     'end'        => $end,
@@ -82,7 +79,6 @@ final readonly class RttRecoveryComputationService
         $weeks       = $this->buildWeeksForExercise($from, $to);
         $weekRanges  = array_map(
             static fn (array $week): array => [
-                'month'      => (int) $week['month'],
                 'weekNumber' => (int) $week['weekNumber'],
                 'start'      => $week['start'],
                 'end'        => $week['end'],
@@ -108,7 +104,7 @@ final readonly class RttRecoveryComputationService
     }
 
     /**
-     * @param list<array{month:int,weekNumber:int,start:DateTimeImmutable,end:DateTimeImmutable}> $weeks
+     * @param list<array{weekNumber:int,start:DateTimeImmutable,end:DateTimeImmutable}> $weeks
      *
      * @return array<string, WeekRecoveryDetail>
      */
@@ -189,6 +185,7 @@ final readonly class RttRecoveryComputationService
             }
 
             $weeklyTotalMinutes      = 0;
+            $dailyWorkedMinutes      = [];
             $employeeContractsByDate = [];
             foreach ($weekDays as $date) {
                 $employeeContractsByDate[$date] = $contractsByDate[$employeeId][$date] ?? null;
@@ -198,6 +195,7 @@ final readonly class RttRecoveryComputationService
                 $metrics = $metricsByDate[$date] ?? new WorkMetrics();
                 $metrics->addCreditedMinutes($creditedByDate[$date] ?? 0);
                 $weeklyTotalMinutes += $metrics->totalMinutes;
+                $dailyWorkedMinutes[$date] = $metrics->totalMinutes;
             }
 
             if ([] === $weekDays) {
@@ -244,6 +242,7 @@ final readonly class RttRecoveryComputationService
                 base50Minutes: $base50,
                 bonus50Minutes: $bonus50,
                 totalMinutes: $totalMinutes,
+                dailyMinutes: $dailyWorkedMinutes,
             );
         }
 
diff --git a/src/State/EmployeeLeaveSummaryProvider.php b/src/State/EmployeeLeaveSummaryProvider.php
index 3453ed7..9d2b812 100644
--- a/src/State/EmployeeLeaveSummaryProvider.php
+++ b/src/State/EmployeeLeaveSummaryProvider.php
@@ -95,6 +95,15 @@ final readonly class EmployeeLeaveSummaryProvider implements ProviderInterface
         $fractionedDays = $this->resolveFractionedDays($employee, $yearSummary['ruleCode'], $year);
         $paidLeaveDays  = $this->resolvePaidLeaveDays($employee, $yearSummary['ruleCode'], $year);
 
+        // For forfait contracts, paid days reduce N-1 stock before taken-day attribution.
+        // Recompute with paidLeaveDays so taken days shift from N-1 to N when N-1 is consumed by payment.
+        if ($paidLeaveDays > 0.0) {
+            $yearSummary = $this->computeYearSummary($employee, $year, $paidLeaveDays);
+            if (null === $yearSummary) {
+                return $summary;
+            }
+        }
+
         $summary->isSupported               = true;
         $summary->ruleCode                  = $yearSummary['ruleCode'];
         $summary->acquiredDays              = $yearSummary['acquiredDays'] + $fractionedDays;
@@ -107,7 +116,7 @@ final readonly class EmployeeLeaveSummaryProvider implements ProviderInterface
         $summary->remainingSaturdays        = $yearSummary['remainingSaturdays'];
         $summary->previousYearAcquiredDays  = $yearSummary['previousYearAcquiredDays'];
         $summary->previousYearTakenDays     = $yearSummary['previousYearTakenDays'];
-        $summary->previousYearRemainingDays = max(0.0, $yearSummary['previousYearRemainingDays'] - $paidLeaveDays);
+        $summary->previousYearRemainingDays = $yearSummary['previousYearRemainingDays'];
         $summary->previousYearPaidDays      = $paidLeaveDays;
 
         [$periodFrom, $periodTo]      = $this->resolvePeriodBounds($employee, $year);
@@ -131,7 +140,7 @@ final readonly class EmployeeLeaveSummaryProvider implements ProviderInterface
      *   previousYearRemainingDays: float
      * }
      */
-    public function computeYearSummary(Employee $employee, int $targetYear): ?array
+    public function computeYearSummary(Employee $employee, int $targetYear, float $paidLeaveDays = 0.0): ?array
     {
         $firstYear = max($this->resolveFirstComputationYear($employee), $targetYear - 1);
         if ($targetYear < $firstYear) {
@@ -271,13 +280,15 @@ final readonly class EmployeeLeaveSummaryProvider implements ProviderInterface
             } else {
                 // Forfait: no "en cours d'acquisition" counter, all rights are in acquired.
                 // Suspensions do not impact forfait 218 leave calculation.
-                // Taken days are first deducted from N-1 carry, then from current year.
-                $previousYearAcquired = $carryDays;
-                $takenFromPrevious    = min(max(0.0, $previousYearAcquired), $takenDays);
-                $previousYearTaken    = $takenFromPrevious;
-                $takenFromCurrent     = $takenDays - $takenFromPrevious;
+                // Paid days reduce N-1 stock first, then taken days are attributed to what remains in N-1.
+                $previousYearAcquired  = $carryDays;
+                $effectivePaidDays     = ($year === $targetYear) ? $paidLeaveDays : 0.0;
+                $availableAfterPayment = max(0.0, $previousYearAcquired - $effectivePaidDays);
+                $takenFromPrevious     = min($availableAfterPayment, $takenDays);
+                $previousYearTaken     = $takenFromPrevious;
+                $takenFromCurrent      = $takenDays - $takenFromPrevious;
 
-                $previousYearRemaining = max(0.0, $previousYearAcquired - $takenFromPrevious);
+                $previousYearRemaining = max(0.0, $availableAfterPayment - $takenFromPrevious);
 
                 $acquiredDays       = $leavePolicy['acquiredDays'];
                 $accruingDays       = 0.0;
diff --git a/src/State/EmployeeRttSummaryProvider.php b/src/State/EmployeeRttSummaryProvider.php
index 1bfed8d..a195567 100644
--- a/src/State/EmployeeRttSummaryProvider.php
+++ b/src/State/EmployeeRttSummaryProvider.php
@@ -71,7 +71,6 @@ final readonly class EmployeeRttSummaryProvider implements ProviderInterface
         $weeks                   = $this->rttRecoveryService->buildWeeksForExercise($periodFrom, $periodTo);
         $weekRanges              = array_map(
             static fn (array $week): array => [
-                'month'      => (int) $week['month'],
                 'weekNumber' => (int) $week['weekNumber'],
                 'start'      => $week['start'],
                 'end'        => $week['end'],
@@ -118,25 +117,7 @@ final readonly class EmployeeRttSummaryProvider implements ProviderInterface
                 $summary->rttStartDate = $this->rttStartDate;
             }
         }
-        $summary->weeks = array_map(
-            static function (array $week) use ($currentByWeekStart) {
-                $detail = $currentByWeekStart[$week['start']->format('Y-m-d')] ?? new WeekRecoveryDetail();
-
-                return new EmployeeRttWeekSummary(
-                    month: (int) $week['month'],
-                    weekNumber: (int) $week['weekNumber'],
-                    weekStart: $week['start']->format('Y-m-d'),
-                    weekEnd: $week['end']->format('Y-m-d'),
-                    overtimeMinutes: $detail->overtimeMinutes,
-                    base25Minutes: $detail->base25Minutes,
-                    bonus25Minutes: $detail->bonus25Minutes,
-                    base50Minutes: $detail->base50Minutes,
-                    bonus50Minutes: $detail->bonus50Minutes,
-                    totalMinutes: $detail->totalMinutes,
-                );
-            },
-            $weekRanges
-        );
+        $summary->weeks = $this->buildWeekSummaries($weekRanges, $currentByWeekStart, $periodFrom, $periodTo);
 
         // Post-process: distribute deficit weeks across cumulative balance (50% first, then 25%)
         $cumulative50 = $carry->base50Minutes + $carry->bonus50Minutes;
@@ -269,4 +250,77 @@ final readonly class EmployeeRttSummaryProvider implements ProviderInterface
 
         return $weekEnd;
     }
+
+    /**
+     * Build week summaries, splitting weeks that span two months into two entries
+     * with values distributed proportionally based on daily worked minutes.
+     *
+     * @param list<array{weekNumber:int,start:DateTimeImmutable,end:DateTimeImmutable}> $weekRanges
+     * @param array<string, WeekRecoveryDetail>                                         $recoveryByWeek
+     *
+     * @return list<EmployeeRttWeekSummary>
+     */
+    private function buildWeekSummaries(array $weekRanges, array $recoveryByWeek, DateTimeImmutable $periodFrom, DateTimeImmutable $periodTo): array
+    {
+        $result = [];
+
+        foreach ($weekRanges as $week) {
+            $weekStart = $week['start'];
+            $weekEnd   = $week['end'];
+            $weekKey   = $weekStart->format('Y-m-d');
+            $detail    = $recoveryByWeek[$weekKey] ?? new WeekRecoveryDetail();
+
+            $effectiveStart = $weekStart < $periodFrom ? $periodFrom : $weekStart;
+            $effectiveEnd   = $weekEnd > $periodTo ? $periodTo : $weekEnd;
+
+            $startMonth = (int) $effectiveStart->format('n');
+            $endMonth   = (int) $effectiveEnd->format('n');
+
+            if ($startMonth === $endMonth) {
+                $result[] = new EmployeeRttWeekSummary(
+                    month: $startMonth,
+                    weekNumber: (int) $week['weekNumber'],
+                    weekStart: $weekStart->format('Y-m-d'),
+                    weekEnd: $weekEnd->format('Y-m-d'),
+                    overtimeMinutes: $detail->overtimeMinutes,
+                    base25Minutes: $detail->base25Minutes,
+                    bonus25Minutes: $detail->bonus25Minutes,
+                    base50Minutes: $detail->base50Minutes,
+                    bonus50Minutes: $detail->bonus50Minutes,
+                    totalMinutes: $detail->totalMinutes,
+                );
+
+                continue;
+            }
+
+            // Week spans two months — split proportionally by daily worked minutes
+            $monthMinutes = [];
+            foreach ($detail->dailyMinutes as $date => $mins) {
+                $m                = (int) new DateTimeImmutable($date)->format('n');
+                $monthMinutes[$m] = ($monthMinutes[$m] ?? 0) + $mins;
+            }
+
+            $totalWorked = array_sum($monthMinutes);
+
+            foreach ([$startMonth, $endMonth] as $month) {
+                $portion = $monthMinutes[$month] ?? 0;
+                $ratio   = $totalWorked > 0 ? $portion / $totalWorked : 0.0;
+
+                $result[] = new EmployeeRttWeekSummary(
+                    month: $month,
+                    weekNumber: (int) $week['weekNumber'],
+                    weekStart: $weekStart->format('Y-m-d'),
+                    weekEnd: $weekEnd->format('Y-m-d'),
+                    overtimeMinutes: (int) round($detail->overtimeMinutes * $ratio),
+                    base25Minutes: (int) round($detail->base25Minutes * $ratio),
+                    bonus25Minutes: (int) round($detail->bonus25Minutes * $ratio),
+                    base50Minutes: (int) round($detail->base50Minutes * $ratio),
+                    bonus50Minutes: (int) round($detail->bonus50Minutes * $ratio),
+                    totalMinutes: (int) round($detail->totalMinutes * $ratio),
+                );
+            }
+        }
+
+        return $result;
+    }
 }