diff --git a/ui/src/components/import/DocumentImportView.tsx b/ui/src/components/import/DocumentImportView.tsx
index 45bf2549..7ccbe3d7 100644
--- a/ui/src/components/import/DocumentImportView.tsx
+++ b/ui/src/components/import/DocumentImportView.tsx
@@ -6,6 +6,7 @@ import {
   XCircle, Receipt, Plus, Minus,
 } from "lucide-react";
 import { rpc } from "../../api/rpc";
+import { UNIT_OPTIONS } from "../../constants";
 
 // ---------------------------------------------------------------------------
 // Types — RPC response shapes from `imports.parse_document_for_import`.
@@ -759,6 +760,9 @@ function InvoiceCard({ item, onUpdate, importedContracts, importedProjects, exis
             const missing = (f: string, v: any) => ireq(f) && (v == null || v === "");
             const borderCls = (f: string, v: any) =>
               missing(f, v) ? "border-red-400/60" : "border-fuchsia-400/20";
+            const unitOptions = li.unit && !(UNIT_OPTIONS as readonly string[]).includes(li.unit)
+              ? [...UNIT_OPTIONS, li.unit]
+              : [...UNIT_OPTIONS];
             return (
             <div key={idx} className="grid grid-cols-[1fr_80px_60px_90px_70px_28px] gap-1.5 items-end">
               <div>
@@ -779,8 +783,11 @@ function InvoiceCard({ item, onUpdate, importedContracts, importedProjects, exis
                 <label className="block text-[10px] text-tertiary mb-0.5">
                   Unit{ireq("unit") && <span className="text-red-400 ml-0.5">*</span>}
                 </label>
-                <input value={li.unit} onChange={(e) => updateItem(idx, "unit", e.target.value)}
-                  className={`w-full px-2 py-1 rounded text-xs bg-bg-card text-primary border ${borderCls("unit", li.unit)} outline-none focus:border-fuchsia-400`} />
+                <select value={li.unit ?? ""} onChange={(e) => updateItem(idx, "unit", e.target.value)}
+                  className={`w-full px-2 py-1 rounded text-xs bg-bg-card text-primary border ${borderCls("unit", li.unit)} outline-none focus:border-fuchsia-400`}>
+                  <option value="" disabled>Select unit</option>
+                  {unitOptions.map((u) => <option key={u} value={u}>{u}</option>)}
+                </select>
               </div>
               <div>
                 <label className="block text-[10px] text-tertiary mb-0.5">
diff --git a/ui/src/components/invoicing/InvoicingView.tsx b/ui/src/components/invoicing/InvoicingView.tsx
index 36c84fc7..1ddf34d0 100644
--- a/ui/src/components/invoicing/InvoicingView.tsx
+++ b/ui/src/components/invoicing/InvoicingView.tsx
@@ -6,6 +6,7 @@ import {
 } from "lucide-react";
 import { rpc, readFileAsDataURL } from "../../api/rpc";
 import { str, num, bool, entity as subEntity, list as entityList, formatDate, invoiceStatus, deepStr, isReminder, reminderLevel } from "../../api/entity";
+import { UNIT_OPTIONS } from "../../constants";
 import { StatusBadge } from "../shared/StatusBadge";
 import { ViewModeToggle } from "../shared/ViewModeToggle";
 import { KanbanBoard, useStageStore, type BoardColumn } from "../shared/KanbanBoard";
@@ -221,8 +222,6 @@ interface LineItem {
   unitPrice: string;
 }
 
-const UNIT_OPTIONS = ["hour", "day", "piece", "flat"] as const;
-
 function makeDefaultItem(project?: Entity | null): LineItem {
   const contract = project ? (project as Record<string, unknown>).contract as Record<string, unknown> | undefined : undefined;
   const unit = contract?.unit as string | undefined;
diff --git a/ui/src/constants.ts b/ui/src/constants.ts
new file mode 100644
index 00000000..6c13c7e3
--- /dev/null
+++ b/ui/src/constants.ts
@@ -0,0 +1 @@
+export const UNIT_OPTIONS = ["hour", "day", "piece", "flat"] as const;