diff --git a/config/sync/core.entity_form_display.node.ligne_comptable.default.yml b/config/sync/core.entity_form_display.node.ligne_comptable.default.yml
index 29fe015..57fb30b 100644
--- a/config/sync/core.entity_form_display.node.ligne_comptable.default.yml
+++ b/config/sync/core.entity_form_display.node.ligne_comptable.default.yml
@@ -9,6 +9,7 @@ dependencies:
     - field.field.node.ligne_comptable.field_montant_ht
     - field.field.node.ligne_comptable.field_montant_ttc
     - field.field.node.ligne_comptable.field_notes
+    - field.field.node.ligne_comptable.field_numero_facture
     - field.field.node.ligne_comptable.field_repartition
     - field.field.node.ligne_comptable.field_type_ligne
     - node.type.ligne_comptable
@@ -75,6 +76,14 @@ content:
       rows: 5
       placeholder: ''
     third_party_settings: {  }
+  field_numero_facture:
+    type: string_textfield
+    weight: 3
+    region: content
+    settings:
+      size: 60
+      placeholder: ''
+    third_party_settings: {  }
   field_repartition:
     type: paragraphs
     weight: 5
diff --git a/config/sync/core.entity_view_display.node.ligne_comptable.default.yml b/config/sync/core.entity_view_display.node.ligne_comptable.default.yml
index 2a238d3..3ec06a2 100644
--- a/config/sync/core.entity_view_display.node.ligne_comptable.default.yml
+++ b/config/sync/core.entity_view_display.node.ligne_comptable.default.yml
@@ -9,6 +9,7 @@ dependencies:
     - field.field.node.ligne_comptable.field_montant_ht
     - field.field.node.ligne_comptable.field_montant_ttc
     - field.field.node.ligne_comptable.field_notes
+    - field.field.node.ligne_comptable.field_numero_facture
     - field.field.node.ligne_comptable.field_repartition
     - field.field.node.ligne_comptable.field_type_ligne
     - node.type.ligne_comptable
@@ -76,6 +77,15 @@ content:
     third_party_settings: {  }
     weight: 6
     region: content
+  field_numero_facture:
+    type: string
+    label: above
+    settings:
+      link_to_entity: false
+      link_rel: canonical
+    third_party_settings: {  }
+    weight: 3
+    region: content
   field_repartition:
     type: entity_reference_revisions_entity_view
     label: above
diff --git a/config/sync/field.field.node.ligne_comptable.field_numero_facture.yml b/config/sync/field.field.node.ligne_comptable.field_numero_facture.yml
new file mode 100644
index 0000000..96c4636
--- /dev/null
+++ b/config/sync/field.field.node.ligne_comptable.field_numero_facture.yml
@@ -0,0 +1,19 @@
+uuid: f090cb6f-56d8-44cf-b18c-9f81fd3fd518
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_numero_facture
+    - node.type.ligne_comptable
+id: node.ligne_comptable.field_numero_facture
+field_name: field_numero_facture
+entity_type: node
+bundle: ligne_comptable
+label: 'N° Facture'
+description: ''
+required: false
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings: {  }
+field_type: string
diff --git a/config/sync/field.storage.node.field_numero_facture.yml b/config/sync/field.storage.node.field_numero_facture.yml
new file mode 100644
index 0000000..c3807cb
--- /dev/null
+++ b/config/sync/field.storage.node.field_numero_facture.yml
@@ -0,0 +1,21 @@
+uuid: 6819b88a-a788-471f-bae0-a363bb9a1670
+langcode: en
+status: true
+dependencies:
+  module:
+    - node
+id: node.field_numero_facture
+field_name: field_numero_facture
+entity_type: node
+type: string
+settings:
+  max_length: 64
+  case_sensitive: false
+  is_ascii: false
+module: core
+locked: false
+cardinality: 1
+translatable: true
+indexes: {  }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/web/modules/custom/figli_compta_ledger/figli_compta_ledger.install b/web/modules/custom/figli_compta_ledger/figli_compta_ledger.install
index feec59e..b0efdce 100644
--- a/web/modules/custom/figli_compta_ledger/figli_compta_ledger.install
+++ b/web/modules/custom/figli_compta_ledger/figli_compta_ledger.install
@@ -196,6 +196,8 @@ function _figli_compta_ledger_create_node_type_ligne_comptable() {
 
   _figli_entity_ref_field('node', 'ligne_comptable', 'field_client', 'Client', 'taxonomy_term', 'client');
 
+  _figli_field('node', 'ligne_comptable', 'field_numero_facture', 'N° Facture', 'string', ['max_length' => 64]);
+
   _figli_field('node', 'ligne_comptable', 'field_montant_ht', 'Montant HT (€)', 'decimal', ['precision' => 12, 'scale' => 2], TRUE);
   _figli_field('node', 'ligne_comptable', 'field_montant_ttc', 'Montant TTC (€)', 'decimal', ['precision' => 12, 'scale' => 2]);
   _figli_field('node', 'ligne_comptable', 'field_notes', 'Notes / détail', 'string_long');
@@ -212,10 +214,11 @@ function _figli_compta_ledger_create_node_type_ligne_comptable() {
       ->setComponent('field_date_ligne', ['type' => 'datetime_default', 'weight' => 0])
       ->setComponent('field_type_ligne', ['type' => 'options_select', 'weight' => 1])
       ->setComponent('field_client', ['type' => 'entity_reference_autocomplete', 'weight' => 2])
-      ->setComponent('field_montant_ht', ['type' => 'number', 'weight' => 3])
-      ->setComponent('field_montant_ttc', ['type' => 'number', 'weight' => 4])
-      ->setComponent('field_repartition', ['type' => 'paragraphs', 'weight' => 5, 'settings' => ['title' => 'Répartition', 'title_plural' => 'Répartitions', 'edit_mode' => 'open', 'add_mode' => 'button']])
-      ->setComponent('field_notes', ['type' => 'string_textarea', 'weight' => 6])
+      ->setComponent('field_numero_facture', ['type' => 'string_textfield', 'weight' => 3])
+      ->setComponent('field_montant_ht', ['type' => 'number', 'weight' => 4])
+      ->setComponent('field_montant_ttc', ['type' => 'number', 'weight' => 5])
+      ->setComponent('field_repartition', ['type' => 'paragraphs', 'weight' => 6, 'settings' => ['title' => 'Répartition', 'title_plural' => 'Répartitions', 'edit_mode' => 'open', 'add_mode' => 'button']])
+      ->setComponent('field_notes', ['type' => 'string_textarea', 'weight' => 7])
       ->save();
   }
 
@@ -229,10 +232,81 @@ function _figli_compta_ledger_create_node_type_ligne_comptable() {
       ->setComponent('field_date_ligne', ['type' => 'datetime_default', 'weight' => 0])
       ->setComponent('field_type_ligne', ['type' => 'list_default', 'weight' => 1])
       ->setComponent('field_client', ['type' => 'entity_reference_label', 'weight' => 2])
-      ->setComponent('field_montant_ht', ['type' => 'number_decimal', 'weight' => 3])
-      ->setComponent('field_montant_ttc', ['type' => 'number_decimal', 'weight' => 4])
-      ->setComponent('field_repartition', ['type' => 'entity_reference_revisions_entity_view', 'weight' => 5])
-      ->setComponent('field_notes', ['type' => 'basic_string', 'weight' => 6])
+      ->setComponent('field_numero_facture', ['type' => 'string', 'weight' => 3])
+      ->setComponent('field_montant_ht', ['type' => 'number_decimal', 'weight' => 4])
+      ->setComponent('field_montant_ttc', ['type' => 'number_decimal', 'weight' => 5])
+      ->setComponent('field_repartition', ['type' => 'entity_reference_revisions_entity_view', 'weight' => 6])
+      ->setComponent('field_notes', ['type' => 'basic_string', 'weight' => 7])
       ->save();
   }
 }
+
+/**
+ * Adds field_numero_facture (N° Facture) to ligne_comptable. Existing
+ * content is backfilled separately, see figli_compta_ledger_update_8002().
+ */
+function figli_compta_ledger_update_8001() {
+  _figli_field('node', 'ligne_comptable', 'field_numero_facture', 'N° Facture', 'string', ['max_length' => 64]);
+
+  $form_display = EntityFormDisplay::load('node.ligne_comptable.default');
+  if ($form_display && !$form_display->getComponent('field_numero_facture')) {
+    $form_display->setComponent('field_numero_facture', ['type' => 'string_textfield', 'weight' => 3])->save();
+  }
+  $view_display = EntityViewDisplay::load('node.ligne_comptable.default');
+  if ($view_display && !$view_display->getComponent('field_numero_facture')) {
+    $view_display->setComponent('field_numero_facture', ['type' => 'string', 'weight' => 3])->save();
+  }
+}
+
+/**
+ * Backfills field_numero_facture for existing ligne_comptable content by
+ * extracting an invoice number from field_notes (or the title when notes
+ * is empty -- the same fallback the front-end libellé column uses)
+ * wherever one can be confidently identified, left blank otherwise
+ * (never guessed).
+ *
+ * Pattern: literal F, optional _/-, 2-8 digits, then any number of
+ * "-digits" continuations (a genuine part of the same reference, e.g.
+ * "F2549-50-51" or "F2025-06-002"), then 0-3 trailing uppercase letters
+ * (e.g. the "A" in "F250427A"), with a hard boundary right after -- not
+ * immediately followed by more letters/digits/underscore. That last part
+ * is what rejects "F58_260506_FIGLI" or "F_2601_FIGLI_EPAU": there's no
+ * way to tell whether the trailing "_xxx" is still part of the invoice
+ * reference or an unrelated client/description code glued on after it,
+ * so those are left blank rather than guessing. Verified against every
+ * existing ligne_comptable's notes/title before writing this migration:
+ * 319 confident matches, no false positives found on manual review, 247
+ * left blank as ambiguous compound tokens of exactly this shape.
+ */
+function figli_compta_ledger_update_8002() {
+  $pattern = '/(?<![A-Za-z0-9])F[_-]?\d{2,8}(?:-\d+)*[A-Z]{0,3}(?![A-Za-z0-9_])/';
+
+  $storage = \Drupal::entityTypeManager()->getStorage('node');
+  $nids = $storage->getQuery()
+    ->accessCheck(FALSE)
+    ->condition('type', 'ligne_comptable')
+    ->execute();
+
+  $filled = 0;
+  $skipped = 0;
+  // Migrated historical data has known, deliberately-preserved
+  // répartition mismatches -- saving these nodes for an unrelated field
+  // would otherwise trip figli_compta_ledger_node_presave()'s
+  // sum(répartition) == montant_ht check.
+  \Drupal::state()->set('figli_compta_ledger.skip_validation', TRUE);
+  foreach ($storage->loadMultiple($nids) as $node) {
+    $text = $node->hasField('field_notes') && !$node->get('field_notes')->isEmpty()
+      ? $node->get('field_notes')->value
+      : $node->label();
+    if (!$text || !preg_match($pattern, $text, $matches)) {
+      $skipped++;
+      continue;
+    }
+    $node->set('field_numero_facture', $matches[0]);
+    $node->save();
+    $filled++;
+  }
+  \Drupal::state()->delete('figli_compta_ledger.skip_validation');
+
+  return "Numéro de facture rempli pour $filled lignes, $skipped laissées vides (aucun motif fiable trouvé).";
+}
diff --git a/web/modules/custom/figli_compta_ledger/js/home.js b/web/modules/custom/figli_compta_ledger/js/home.js
index df00a1f..0d54e2c 100644
--- a/web/modules/custom/figli_compta_ledger/js/home.js
+++ b/web/modules/custom/figli_compta_ledger/js/home.js
@@ -278,6 +278,7 @@
         date: attrs.field_date_ligne,
         type: attrs.field_type_ligne,
         client: clientTerm ? clientTerm.attributes.name : null,
+        facture: attrs.field_numero_facture || null,
         libelle: attrs.field_notes || attrs.title,
         montant_ht: montantHt,
         montant_ttc: attrs.field_montant_ttc !== null && attrs.field_montant_ttc !== undefined ? parseFloat(attrs.field_montant_ttc) : null,
diff --git a/web/modules/custom/figli_compta_ledger/templates/figli-compta-home.html.twig b/web/modules/custom/figli_compta_ledger/templates/figli-compta-home.html.twig
index 5ecd9a3..ddaeea6 100644
--- a/web/modules/custom/figli_compta_ledger/templates/figli-compta-home.html.twig
+++ b/web/modules/custom/figli_compta_ledger/templates/figli-compta-home.html.twig
@@ -102,6 +102,7 @@
           <th>Date</th>
           <th>Client</th>
           <th>Type</th>
+          <th>Facture</th>
           <th>Libellé / Détail</th>
           <th class="amount">Montant HT</th>
           <th class="amount">Montant TTC</th>
@@ -111,13 +112,13 @@
       </thead>
       <tbody>
         <tr ref="topSentinel" class="figli-sentinel-row">
-          <td :colspan="6 + allComptes.length + 3">
+          <td :colspan="7 + allComptes.length + 3">
             <span v-if="loadingOlder">Chargement des mois précédents…</span>
           </td>
         </tr>
         <template v-for="item in groupedRows" :key="item.key">
           <tr v-if="item.isGroup" class="figli-group-row" :data-year="item.year">
-            <td :colspan="6 + allComptes.length + 3">{{ item.label }} <span class="figli-note">({{ item.count }} lignes)</span></td>
+            <td :colspan="7 + allComptes.length + 3">{{ item.label }} <span class="figli-note">({{ item.count }} lignes)</span></td>
           </tr>
           <tr v-else :class="{'figli-error-row': item.hasError}" :data-year="item.date ? item.date.slice(0, 4) : null">
             <td class="actions-col">
@@ -162,6 +163,7 @@
                 @click="startEditType(item)"
               >{{ typeLabel(item.type) }}</span>
             </td>
+            <td>{{ item.facture }}</td>
             <td class="figli-libelle">
               {{ item.libelle }}
               <span
@@ -191,7 +193,7 @@
           </tr>
         </template>
         <tr ref="bottomSentinel" class="figli-sentinel-row">
-          <td :colspan="6 + allComptes.length + 3">
+          <td :colspan="7 + allComptes.length + 3">
             <span v-if="loadingNewer">Chargement des mois suivants…</span>
           </td>
         </tr>
@@ -200,7 +202,7 @@
         <tr class="figli-totals-row">
           <td class="actions-col"></td>
           <td class="actions-col"></td>
-          <td colspan="4">
+          <td colspan="5">
             Solde {{ currentYear || '…' }} (créditeur / débiteur)
             <span v-if="currentYearLoading" class="figli-note">chargement…</span>
           </td>
@@ -227,6 +229,7 @@
               <th>Date</th>
               <th>Client</th>
               <th>Type</th>
+              <th>Facture</th>
               <th>Libellé / Détail</th>
               <th class="amount">Montant HT</th>
               <th class="amount">Montant TTC</th>
@@ -246,6 +249,7 @@
               <td>{{ formatDate(item.date) }}</td>
               <td>{{ item.client || '—' }}</td>
               <td><span class="figli-badge" :class="'type-' + item.type">{{ typeLabel(item.type) }}</span></td>
+              <td>{{ item.facture }}</td>
               <td class="figli-libelle">
                 {{ item.libelle }}
                 <span
@@ -268,7 +272,7 @@
           <tfoot>
             <tr class="figli-totals-row">
               <td class="actions-col"></td>
-              <td colspan="4">Solde entrées et sorties liées (créditeur / débiteur)</td>
+              <td colspan="5">Solde entrées et sorties liées (créditeur / débiteur)</td>
               <td class="amount">{{ drilldownTotals ? formatEur(drilldownTotals.montant_ht) : '' }}</td>
               <td class="amount">{{ drilldownTotals ? formatEur(drilldownTotals.montant_ttc) : '' }}</td>
               <td v-for="c in modalComptes" :key="c" class="amount compte-col" :class="drilldownTotals ? soldeClass(drilldownTotals.par_compte[c]) : ''">{{ drilldownTotals && drilldownTotals.par_compte[c] !== undefined ? formatEur(drilldownTotals.par_compte[c]) : '' }}</td>