diff --git a/app/Model/Facade/FakturaFacade.php b/app/Model/Facade/FakturaFacade.php
index 72155e4..8cd994f 100644
--- a/app/Model/Facade/FakturaFacade.php
+++ b/app/Model/Facade/FakturaFacade.php
@@ -538,4 +538,51 @@ class FakturaFacade
     {
         $this->kufrikExplorer->table('FAKTURA')->where('ID', $id)->delete();
     }
+
+    /**
+     * Kopie faktury: nové číslo, dnešní data, stejný odběratel a položky, bez plateb.
+     *
+     * @return int ID nové faktury
+     */
+    public function duplicate(int $id, int $firmaId): int
+    {
+        $zdroj = $this->getById($id);
+        if (!$zdroj) {
+            throw new \InvalidArgumentException('Faktura nebyla nalezena.');
+        }
+
+        $dnes = new \DateTimeImmutable('today');
+        $dalsi = $this->getNextCislo($firmaId, $dnes);
+        $datumVystaveni = $dnes->format('Y-m-d');
+        $datumSplatnosti = $dnes
+            ->modify('+' . $dalsi['splatnostDny'] . ' days')
+            ->format('Y-m-d');
+
+        $novaId = $this->saveFaktura([
+            'ZAKAZNIK_ID' => (int) $zdroj->ZAKAZNIK,
+            'CISLO' => $dalsi['cislo'],
+            'CISLO_ABS' => $dalsi['cisloAbs'],
+            'FORMA_UHRADY' => (int) ($zdroj->FORMA_UHRADY ?? 1),
+            'DATUM_VYSTAVENI' => $datumVystaveni,
+            'DATUM_SPLATNOSTI' => $datumSplatnosti,
+            'DATUM_DUZP' => $datumVystaveni,
+            'STAV' => self::STAV_VYSTAVENO,
+            'CINNOSTI' => $zdroj->CINNOSTI,
+        ], null, $firmaId);
+
+        $polozky = [];
+        foreach ($this->getPolozky($id) as $polozka) {
+            $polozky[] = [
+                'NAZEV' => $polozka->NAZEV,
+                'POCET' => $polozka->POCET,
+                'JEDNOTKA' => $polozka->JEDNOTKA,
+                'CENA_JEDNOTKA' => $polozka->CENA_JEDNOTKA,
+                'SLEVA' => $polozka->SLEVA,
+            ];
+        }
+        $this->savePolozky($novaId, $polozky, $firmaId);
+        $this->syncStav($novaId);
+
+        return $novaId;
+    }
 }
\ No newline at end of file
diff --git a/app/UI/Faktura/FakturaPresenter.php b/app/UI/Faktura/FakturaPresenter.php
index 407f74d..5f2b32c 100644
--- a/app/UI/Faktura/FakturaPresenter.php
+++ b/app/UI/Faktura/FakturaPresenter.php
@@ -218,4 +218,22 @@ class FakturaPresenter extends BasePresenter
 
         $this->redirect('this');
     }
+
+    /**
+     * Kopie faktury — nové číslo, dnešní data, stejné položky; otevře editaci.
+     */
+    public function handleDuplicate(int $id): void
+    {
+        $firmaId = (int) $this->getUser()->getIdentity()->firma_id;
+
+        try {
+            $novaId = $this->fakturaFacade->duplicate($id, $firmaId);
+        } catch (\InvalidArgumentException $e) {
+            $this->flashMessage($e->getMessage(), 'danger');
+            $this->redirect('this');
+        }
+
+        $this->flashMessage('Kopie faktury byla vytvořena.', 'success');
+        $this->redirect('FakturaEdit:edit', $novaId);
+    }
 }
\ No newline at end of file
diff --git a/app/UI/Faktura/default.latte b/app/UI/Faktura/default.latte
index 739818d..7cb7ed9 100644
--- a/app/UI/Faktura/default.latte
+++ b/app/UI/Faktura/default.latte
@@ -137,6 +137,13 @@
                                     <i class="bi bi-pencil"></i>
                                 </a>
 
+                                <!-- Kopie faktury -->
+                                <a n:href="duplicate! $f->ID"
+                                   class="btn btn-sm btn-outline-secondary me-1"
+                                   title="Vytvořit kopii">
+                                    <i class="bi bi-copy"></i>
+                                </a>
+
                                 <!-- Smazání faktury -->
                                 <a n:href="delete! $f->ID" 
                                    class="btn btn-sm btn-outline-danger"