diff --git a/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx b/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx
index 74d6ef02..fdb627be 100644
--- a/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx
+++ b/src/app/(protected)/vendors/_components/vendor-detail-drawer.tsx
@@ -254,10 +254,13 @@ function DrawerEditor({
   const selectedIndex = technicians.findIndex(
     (technician) => technician.id != null && String(technician.id) === String(vendor.id),
   );
-  const selectedTotalJobs =
-    roster?.technicians.find(
-      (technician) => technician.id != null && String(technician.id) === String(vendor.id),
-    )?.totalJobs ?? vendor.totalJobs;
+  const persistedTechnician = roster?.technicians.find(
+    (technician) => technician.id != null && String(technician.id) === String(vendor.id),
+  );
+  const selectedTotalJobs = persistedTechnician?.totalJobs ?? vendor.totalJobs;
+  // Deactivation is a property of the saved vendor, not of the toggle: flipping an
+  // inactive vendor on and back off without saving must not ask to deactivate it.
+  const persistedIsActive = persistedTechnician?.isActive ?? vendor.isActive;
 
   if (form.isLoading) {
     return <CircularProgress size={28} sx={{ m: "auto" }} />;
@@ -310,7 +313,7 @@ function DrawerEditor({
                       checked={Boolean(field.value)}
                       slotProps={{ input: { "aria-label": "Active status" } }}
                       onChange={(_event, checked) => {
-                        if (field.value && !checked) onRequestDeactivation(vendor);
+                        if (persistedIsActive && !checked) onRequestDeactivation(vendor);
                         else field.onChange(checked);
                       }}
                     />
diff --git a/src/test/app/(protected)/vendors/vendor-detail-drawer.test.tsx b/src/test/app/(protected)/vendors/vendor-detail-drawer.test.tsx
index df329a4a..3029e06c 100644
--- a/src/test/app/(protected)/vendors/vendor-detail-drawer.test.tsx
+++ b/src/test/app/(protected)/vendors/vendor-detail-drawer.test.tsx
@@ -1,4 +1,5 @@
 import { screen } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
 import { describe, expect, it, vi } from "vitest";
 import { VendorDetailDrawer } from "@/app/(protected)/vendors/_components/vendor-detail-drawer";
 import { renderWithProviders } from "@/test/test-utils";
@@ -134,3 +135,60 @@ describe("VendorDetailDrawer selected-technician display", () => {
     expect(screen.queryByRole("switch", { name: "Active status" })).not.toBeInTheDocument();
   });
 });
+
+describe("VendorDetailDrawer deactivation prompt", () => {
+  const inactiveVendor: VendorListItem = { ...vendor, isActive: false };
+
+  it("does not prompt to deactivate a saved-inactive vendor toggled on and back off", async () => {
+    useVendorCompanyRoster.mockReturnValue(
+      rosterWith([
+        { id: 1, contactName: "Adam", phone: "314-555-0198", isActive: false, totalJobs: 5 },
+      ]),
+    );
+    const onRequestDeactivation = vi.fn();
+
+    renderWithProviders(
+      <VendorDetailDrawer
+        open={true}
+        vendor={inactiveVendor}
+        startInEdit={true}
+        onRequestDeactivation={onRequestDeactivation}
+        onClose={vi.fn()}
+      />,
+      { route: "/vendors", withAuth: false },
+    );
+
+    const toggle = screen.getByRole("switch", { name: "Active status" });
+    await userEvent.click(toggle);
+    expect(toggle).toBeChecked();
+
+    await userEvent.click(toggle);
+
+    expect(toggle).not.toBeChecked();
+    expect(onRequestDeactivation).not.toHaveBeenCalled();
+  });
+
+  it("prompts to deactivate a saved-active vendor when the toggle is switched off", async () => {
+    useVendorCompanyRoster.mockReturnValue(
+      rosterWith([
+        { id: 1, contactName: "Adam", phone: "314-555-0198", isActive: true, totalJobs: 5 },
+      ]),
+    );
+    const onRequestDeactivation = vi.fn();
+
+    renderWithProviders(
+      <VendorDetailDrawer
+        open={true}
+        vendor={vendor}
+        startInEdit={true}
+        onRequestDeactivation={onRequestDeactivation}
+        onClose={vi.fn()}
+      />,
+      { route: "/vendors", withAuth: false },
+    );
+
+    await userEvent.click(screen.getByRole("switch", { name: "Active status" }));
+
+    expect(onRequestDeactivation).toHaveBeenCalledWith(vendor);
+  });
+});