diff --git a/app.py b/app.py
index b4af1f0..43d1680 100644
--- a/app.py
+++ b/app.py
@@ -1799,6 +1799,14 @@ def api_new_slot():
     if over:
         conn.close()
         return jsonify({'error': f"Capacité maximale atteinte : {peak} impression(s) déjà en cours sur ce créneau (limite : {max_printers} simultanées). Décalez l'horaire ou attendez qu'une imprimante se libère."}), 409
+    already_done = bool(d.get('already_done', False))
+    if already_done:
+        # Retroactive — skip capacity/overlap checks, insert as done
+        conn.execute(
+            'INSERT INTO print_slots(job_id,printer_id,planned_start,planned_end,status) VALUES(?,?,?,?,?)',
+            (job_id, printer_id, start_dt.isoformat(), end_dt.isoformat(), 'done'))
+        conn.commit(); conn.close()
+        return jsonify({'ok': True})
     conn.execute('INSERT INTO print_slots(job_id,printer_id,planned_start,planned_end,status) VALUES(?,?,?,?,?)',
                  (job_id, printer_id, start_dt.isoformat(), end_dt.isoformat(), 'planned'))
     conn.commit(); conn.close()
diff --git a/templates/planning.html b/templates/planning.html
index 94b23a7..29ce888 100644
--- a/templates/planning.html
+++ b/templates/planning.html
@@ -148,6 +148,15 @@
           <label class="form-label fw-semibold">Date et heure de lancement</label>
           <input type="datetime-local" id="modalStart" class="form-control">
         </div>
+        <div class="mb-2">
+          <div class="form-check">
+            <input class="form-check-input" type="checkbox" id="modalAlreadyDone" onchange="onAlreadyDoneChange()">
+            <label class="form-check-label fw-semibold text-success" for="modalAlreadyDone">
+              <i class="bi bi-check-circle-fill me-1"></i>Déjà imprimé
+            </label>
+          </div>
+          <div class="form-text ms-4">Enregistre le plateau comme terminé sans passer par le planning actif.</div>
+        </div>
         <div id="modalSuggestion" class="alert alert-success py-2 small d-none">
           <i class="bi bi-magic me-1"></i><span id="modalSuggestionText"></span>
         </div>
@@ -157,7 +166,7 @@
       </div>
       <div class="modal-footer">
         <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">Annuler</button>
-        <button type="button" class="btn fw-bold" style="background:#ff6b35;color:#fff" onclick="saveSlot()">
+        <button type="button" id="modalSaveBtn" class="btn fw-bold" style="background:#ff6b35;color:#fff" onclick="saveSlot()">
           <i class="bi bi-save me-1"></i>Planifier
         </button>
       </div>
@@ -525,11 +534,33 @@ function formatDt(iso) {
          d.toLocaleTimeString('fr-FR',{hour:'2-digit',minute:'2-digit'});
 }
 
+function onAlreadyDoneChange() {
+  const done = document.getElementById('modalAlreadyDone').checked;
+  const btn  = document.getElementById('modalSaveBtn');
+  if (done) {
+    btn.innerHTML = '<i class="bi bi-check-circle me-1"></i>Enregistrer comme terminé';
+    btn.style.background = '#22c55e';
+    // Reset to "now" so user picks when it was done
+    const now = new Date();
+    now.setMinutes(0, 0, 0);
+    document.getElementById('modalStart').value = now.toISOString().slice(0,16);
+    document.getElementById('modalSuggestion').classList.add('d-none');
+    document.getElementById('modalError').classList.add('d-none');
+  } else {
+    btn.innerHTML = '<i class="bi bi-save me-1"></i>Planifier';
+    btn.style.background = '#ff6b35';
+  }
+}
+
 function openScheduleModal(jobId, printTime, jobName) {
   document.getElementById('modalJobId').value = jobId;
   document.getElementById('modalPrintTime').value = printTime;
   document.getElementById('modalJobName').textContent = jobName;
   document.getElementById('modalSuggestion').classList.add('d-none');
+  document.getElementById('modalError').classList.add('d-none');
+  // Reset already-done checkbox
+  document.getElementById('modalAlreadyDone').checked = false;
+  onAlreadyDoneChange();
   // Default: now rounded to next hour
   const now = new Date();
   now.setMinutes(0, 0, 0);
@@ -559,15 +590,17 @@ async function suggestSlot(jobId, printTime, jobName) {
 }
 
 async function saveSlot() {
-  const jobId    = parseInt(document.getElementById('modalJobId').value);
-  const printer  = parseInt(document.getElementById('modalPrinter').value);
-  const start    = document.getElementById('modalStart').value;
+  const jobId      = parseInt(document.getElementById('modalJobId').value);
+  const printer    = parseInt(document.getElementById('modalPrinter').value);
+  const start      = document.getElementById('modalStart').value;
+  const alreadyDone = document.getElementById('modalAlreadyDone').checked;
   // Clear previous error
   document.getElementById('modalError').classList.add('d-none');
   const r = await fetch('/api/slots/new', {
     method: 'POST',
     headers: {'Content-Type':'application/json'},
-    body: JSON.stringify({job_id: jobId, printer_id: printer, planned_start: start})
+    body: JSON.stringify({job_id: jobId, printer_id: printer, planned_start: start,
+                          already_done: alreadyDone})
   });
   const res = await r.json();
   if (res.ok) {