diff --git a/src/components/cases/expenses-tab.tsx b/src/components/cases/expenses-tab.tsx
index 7cb78f3..2181233 100644
--- a/src/components/cases/expenses-tab.tsx
+++ b/src/components/cases/expenses-tab.tsx
@@ -6,7 +6,7 @@ import { Label } from "@/components/ui/label";
 import { Checkbox } from "@/components/ui/checkbox";
 import { supabase } from "@/integrations/supabase/client";
 import { useAuth } from "@/lib/auth";
-import { Plus, Trash2, Loader2, Receipt as ReceiptIcon, CheckCircle2, Undo2, Download, RefreshCw } from "lucide-react";
+import { Plus, Trash2, Loader2, Receipt as ReceiptIcon, CheckCircle2, Undo2, Download, RefreshCw, Pencil } from "lucide-react";
 import { formatCurrency, formatDate } from "@/lib/format";
 import { ensureMarkedInvoicedPlaceholder } from "@/lib/invoice-generation";
 import { toast } from "sonner";
@@ -19,6 +19,7 @@ import {
   SelectValue,
 } from "@/components/ui/select";
 import { SearchableSelect } from "@/components/ui/searchable-select";
+import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogFooter } from "@/components/ui/dialog";
 
 interface FeeItem {
   id: string;
@@ -47,6 +48,15 @@ export function CaseExpensesTab({ caseId }: { caseId: string }) {
   const [fees, setFees] = useState<FeeItem[]>([]);
   const [selectedFeeId, setSelectedFeeId] = useState<string>("");
   const [showImport, setShowImport] = useState(false);
+  const [staff, setStaff] = useState<Array<{ id: string; full_name: string | null; email: string | null }>>([]);
+  const [editItem, setEditItem] = useState<any | null>(null);
+
+  useEffect(() => {
+    (async () => {
+      const { data } = await supabase.from("profiles").select("id, full_name, email").order("full_name");
+      setStaff((data ?? []) as any);
+    })();
+  }, []);
 
   const load = async () => {
     const { data, error } = await supabase
@@ -356,6 +366,7 @@ export function CaseExpensesTab({ caseId }: { caseId: string }) {
                         </Button>
                       )}
                       {!e.invoice_id && <Button variant="ghost" size="icon" onClick={() => del(e)}><Trash2 className="h-4 w-4 text-destructive" /></Button>}
+                      {!e.invoice_id && <Button variant="ghost" size="icon" onClick={() => setEditItem(e)} title="Edit"><Pencil className="h-4 w-4" /></Button>}
                     </div>
                   </td>
                 </tr>
@@ -373,6 +384,14 @@ export function CaseExpensesTab({ caseId }: { caseId: string }) {
         clientId={clientId}
         onImported={load}
       />
+
+      <EditExpenseDialog
+        item={editItem}
+        staff={staff}
+        currentUserId={user?.id ?? ""}
+        onClose={() => setEditItem(null)}
+        onSaved={() => { setEditItem(null); load(); }}
+      />
     </div>
   );
 }
@@ -385,3 +404,125 @@ function Stat({ label, value }: { label: string; value: string }) {
     </div>
   );
 }
+
+function EditExpenseDialog({
+  item,
+  staff,
+  currentUserId,
+  onClose,
+  onSaved,
+}: {
+  item: any | null;
+  staff: Array<{ id: string; full_name: string | null; email: string | null }>;
+  currentUserId: string;
+  onClose: () => void;
+  onSaved: () => void;
+}) {
+  const [form, setForm] = useState({
+    expense_date: "",
+    user_id: "",
+    description: "",
+    quantity: "1",
+    unit_price: "",
+    billable: true,
+  });
+  const [saving, setSaving] = useState(false);
+
+  useEffect(() => {
+    if (item) {
+      setForm({
+        expense_date: item.expense_date ?? "",
+        user_id: item.user_id ?? currentUserId,
+        description: item.description ?? "",
+        quantity: String(item.quantity ?? 1),
+        unit_price: String(item.unit_price ?? item.amount ?? ""),
+        billable: !!item.billable,
+      });
+    }
+  }, [item, currentUserId]);
+
+  const save = async () => {
+    if (!item) return;
+    const quantity = parseFloat(form.quantity);
+    const unit_price = parseFloat(form.unit_price);
+    if (isNaN(quantity) || quantity <= 0) { toast.error("Quantity must be > 0"); return; }
+    if (isNaN(unit_price) || unit_price < 0) { toast.error("Invalid unit price"); return; }
+    if (!form.description.trim()) { toast.error("Description required"); return; }
+    const amount = +(quantity * unit_price).toFixed(2);
+    setSaving(true);
+    const { error } = await supabase
+      .from("expenses")
+      .update({
+        expense_date: form.expense_date,
+        user_id: form.user_id,
+        description: form.description.trim(),
+        quantity,
+        unit_price,
+        amount,
+        billable: form.billable,
+      })
+      .eq("id", item.id);
+    setSaving(false);
+    if (error) { toast.error(error.message); return; }
+    toast.success("Expense updated");
+    onSaved();
+  };
+
+  return (
+    <Dialog open={!!item} onOpenChange={(o) => { if (!o) onClose(); }}>
+      <DialogContent>
+        <DialogHeader><DialogTitle>Edit expense</DialogTitle></DialogHeader>
+        <div className="space-y-3">
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <Label>Date</Label>
+              <Input type="date" value={form.expense_date} onChange={(e) => setForm({ ...form, expense_date: e.target.value })} />
+            </div>
+            <div>
+              <Label>Entered by</Label>
+              <Select value={form.user_id} onValueChange={(v) => setForm({ ...form, user_id: v })}>
+                <SelectTrigger><SelectValue placeholder="Select staff…" /></SelectTrigger>
+                <SelectContent>
+                  {staff.map((s) => (
+                    <SelectItem key={s.id} value={s.id}>
+                      {(s.full_name || s.email || "Unknown") + (s.id === currentUserId ? " (me)" : "")}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
+          </div>
+          <div className="grid grid-cols-3 gap-3">
+            <div>
+              <Label>Qty</Label>
+              <Input type="number" step="any" min="0" value={form.quantity} onChange={(e) => setForm({ ...form, quantity: e.target.value })} />
+            </div>
+            <div>
+              <Label>Unit price ($)</Label>
+              <Input type="number" step="0.01" min="0" value={form.unit_price} onChange={(e) => setForm({ ...form, unit_price: e.target.value })} />
+            </div>
+            <div>
+              <Label>Total</Label>
+              <Input readOnly tabIndex={-1} className="bg-muted/40"
+                value={`$${((parseFloat(form.quantity) || 0) * (parseFloat(form.unit_price) || 0)).toFixed(2)}`} />
+            </div>
+          </div>
+          <div>
+            <Label>Description</Label>
+            <Input value={form.description} onChange={(e) => setForm({ ...form, description: e.target.value })} maxLength={500} />
+          </div>
+          <label className="flex items-center gap-2 text-sm">
+            <Checkbox checked={form.billable} onCheckedChange={(c) => setForm({ ...form, billable: !!c })} />
+            Billable
+          </label>
+        </div>
+        <DialogFooter>
+          <Button variant="outline" onClick={onClose}>Cancel</Button>
+          <Button onClick={save} disabled={saving}>
+            {saving && <Loader2 className="h-4 w-4 mr-2 animate-spin" />}Save
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}