diff --git a/include/ui/inventory_screen.hpp b/include/ui/inventory_screen.hpp
index baffe8de..ccc55631 100644
--- a/include/ui/inventory_screen.hpp
+++ b/include/ui/inventory_screen.hpp
@@ -173,6 +173,8 @@ public:
     /// Drop the currently held item into a specific equipment slot.
     /// Returns true if the drop was accepted and consumed.
     bool dropHeldItemToEquipSlot(game::Inventory& inv, game::EquipSlot slot);
+    /// Drop the currently held item into a bank slot via CMSG_SWAP_ITEM.
+    void dropIntoBankSlot(game::GameHandler& gh, uint8_t dstBag, uint8_t dstSlot);
 };
 
 } // namespace ui
diff --git a/src/ui/game_screen.cpp b/src/ui/game_screen.cpp
index d1e6fa22..618af2c9 100644
--- a/src/ui/game_screen.cpp
+++ b/src/ui/game_screen.cpp
@@ -7472,13 +7472,24 @@ void GameScreen::renderBankWindow(game::GameHandler& gameHandler) {
     // Main bank slots (28 = 7 columns × 4 rows)
     ImGui::Text("Bank Slots");
     ImGui::Separator();
+    bool isHolding = inventoryScreen.isHoldingItem();
     for (int i = 0; i < game::Inventory::BANK_SLOTS; i++) {
         if (i % 7 != 0) ImGui::SameLine();
         const auto& slot = inv.getBankSlot(i);
 
         ImGui::PushID(i + 1000);
         if (slot.empty()) {
+            // Highlight as drop target when holding an item
+            if (isHolding) {
+                ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.08f, 0.20f, 0.08f, 0.8f));
+                ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(0.0f, 0.35f, 0.0f, 0.9f));
+            }
             ImGui::Button("##bank", ImVec2(42, 42));
+            if (isHolding) ImGui::PopStyleColor(2);
+            if (ImGui::IsItemClicked(ImGuiMouseButton_Left) && isHolding) {
+                // Drop held item into empty bank slot
+                inventoryScreen.dropIntoBankSlot(gameHandler, 0xFF, static_cast<uint8_t>(39 + i));
+            }
         } else {
             ImVec4 qc = InventoryScreen::getQualityColor(slot.item.quality);
             ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(qc.x * 0.3f, qc.y * 0.3f, qc.z * 0.3f, 0.8f));
@@ -7486,13 +7497,17 @@ void GameScreen::renderBankWindow(game::GameHandler& gameHandler) {
 
             std::string label = std::to_string(slot.item.stackCount > 1 ? slot.item.stackCount : 0);
             if (slot.item.stackCount <= 1) label = "##b" + std::to_string(i);
-            if (ImGui::Button(label.c_str(), ImVec2(42, 42))) {
-                // Right-click to withdraw: bag=0xFF means bank, slot=i
-                // Use CMSG_AUTOSTORE_BANK_ITEM with bank container
-                // WoW bank slots are inventory slots 39-66 (BANK_SLOT_1 = 39)
-                gameHandler.withdrawItem(0xFF, static_cast<uint8_t>(39 + i));
-            }
+            ImGui::Button(label.c_str(), ImVec2(42, 42));
             ImGui::PopStyleColor(2);
+            if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) {
+                if (isHolding) {
+                    // Swap held item with bank slot
+                    inventoryScreen.dropIntoBankSlot(gameHandler, 0xFF, static_cast<uint8_t>(39 + i));
+                } else {
+                    // Withdraw on click
+                    gameHandler.withdrawItem(0xFF, static_cast<uint8_t>(39 + i));
+                }
+            }
             if (ImGui::IsItemHovered()) {
                 ImGui::BeginTooltip();
                 ImGui::TextColored(qc, "%s", slot.item.name.c_str());
@@ -7537,17 +7552,29 @@ void GameScreen::renderBankWindow(game::GameHandler& gameHandler) {
             const auto& slot = inv.getBankBagSlot(bagIdx, s);
             ImGui::PushID(3000 + bagIdx * 100 + s);
             if (slot.empty()) {
+                if (isHolding) {
+                    ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(0.08f, 0.20f, 0.08f, 0.8f));
+                    ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(0.0f, 0.35f, 0.0f, 0.9f));
+                }
                 ImGui::Button("##bb", ImVec2(42, 42));
+                if (isHolding) ImGui::PopStyleColor(2);
+                if (ImGui::IsItemClicked(ImGuiMouseButton_Left) && isHolding) {
+                    inventoryScreen.dropIntoBankSlot(gameHandler, static_cast<uint8_t>(67 + bagIdx), static_cast<uint8_t>(s));
+                }
             } else {
                 ImVec4 qc = InventoryScreen::getQualityColor(slot.item.quality);
                 ImGui::PushStyleColor(ImGuiCol_Button, ImVec4(qc.x * 0.3f, qc.y * 0.3f, qc.z * 0.3f, 0.8f));
                 ImGui::PushStyleColor(ImGuiCol_ButtonHovered, ImVec4(qc.x * 0.5f, qc.y * 0.5f, qc.z * 0.5f, 0.9f));
                 std::string lbl = slot.item.stackCount > 1 ? std::to_string(slot.item.stackCount) : ("##bb" + std::to_string(bagIdx * 100 + s));
-                if (ImGui::Button(lbl.c_str(), ImVec2(42, 42))) {
-                    // Withdraw from bank bag: bank bag container indices start at 67
-                    gameHandler.withdrawItem(static_cast<uint8_t>(67 + bagIdx), static_cast<uint8_t>(s));
-                }
+                ImGui::Button(lbl.c_str(), ImVec2(42, 42));
                 ImGui::PopStyleColor(2);
+                if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) {
+                    if (isHolding) {
+                        inventoryScreen.dropIntoBankSlot(gameHandler, static_cast<uint8_t>(67 + bagIdx), static_cast<uint8_t>(s));
+                    } else {
+                        gameHandler.withdrawItem(static_cast<uint8_t>(67 + bagIdx), static_cast<uint8_t>(s));
+                    }
+                }
                 if (ImGui::IsItemHovered()) {
                     ImGui::BeginTooltip();
                     ImGui::TextColored(qc, "%s", slot.item.name.c_str());
diff --git a/src/ui/inventory_screen.cpp b/src/ui/inventory_screen.cpp
index e12f24ca..8bc1f8d4 100644
--- a/src/ui/inventory_screen.cpp
+++ b/src/ui/inventory_screen.cpp
@@ -543,6 +543,25 @@ bool InventoryScreen::dropHeldItemToEquipSlot(game::Inventory& inv, game::EquipS
     return !holdingItem;
 }
 
+void InventoryScreen::dropIntoBankSlot(game::GameHandler& /*gh*/, uint8_t dstBag, uint8_t dstSlot) {
+    if (!holdingItem || !gameHandler_) return;
+    uint8_t srcBag = 0xFF;
+    uint8_t srcSlot = 0;
+    if (heldSource == HeldSource::BACKPACK && heldBackpackIndex >= 0) {
+        srcSlot = static_cast<uint8_t>(23 + heldBackpackIndex);
+    } else if (heldSource == HeldSource::BAG) {
+        srcBag = static_cast<uint8_t>(19 + heldBagIndex);
+        srcSlot = static_cast<uint8_t>(heldBagSlotIndex);
+    } else if (heldSource == HeldSource::EQUIPMENT) {
+        srcSlot = static_cast<uint8_t>(heldEquipSlot);
+    } else {
+        return;
+    }
+    gameHandler_->swapContainerItems(srcBag, srcSlot, dstBag, dstSlot);
+    holdingItem = false;
+    inventoryDirty = true;
+}
+
 bool InventoryScreen::beginPickupFromEquipSlot(game::Inventory& inv, game::EquipSlot slot) {
     if (holdingItem) return false;
     const auto& eq = inv.getEquipSlot(slot);