diff --git a/src/routes/settings.import.tsx b/src/routes/settings.import.tsx
index cb0af55..68908fb 100644
--- a/src/routes/settings.import.tsx
+++ b/src/routes/settings.import.tsx
@@ -84,8 +84,25 @@ const toBool = (v: any) => {
 
 const toNum = (v: any) => {
   if (v === "" || v == null) return null;
-  const n = Number(String(v).replace(/[$,]/g, ""));
-  return isNaN(n) ? null : n;
+  if (typeof v === "number") return isNaN(v) ? null : v;
+  let s = String(v).trim();
+  if (!s) return null;
+  // Accounting negatives: (123.45) → -123.45
+  let negative = false;
+  if (/^\(.*\)$/.test(s)) {
+    negative = true;
+    s = s.slice(1, -1);
+  }
+  // Strip currency symbols, commas, spaces, and stray non-numeric chars (keep . and -)
+  s = s.replace(/[$£€¥,\s]/g, "");
+  if (s.endsWith("-")) {
+    // trailing minus (e.g. "100-")
+    negative = true;
+    s = s.slice(0, -1);
+  }
+  const n = Number(s);
+  if (isNaN(n)) return null;
+  return negative ? -n : n;
 };
 
 const toDate = (v: any): string | null => {
@@ -567,9 +584,14 @@ const IMPORTERS: ImporterConfig[] = [
       issuedate: "issue_date", date: "issue_date", invoicedate: "issue_date", billdate: "issue_date",
       duedate: "due_date",
       status: "status",
-      subtotal: "subtotal", tax: "tax", total: "total", amount: "total", invoicetotal: "total", grandtotal: "total",
-      amountpaid: "amount_paid", paid: "amount_paid", paidamount: "amount_paid",
-      notes: "notes", memo: "notes", description: "notes",
+      subtotal: "subtotal", subtot: "subtotal", sub: "subtotal", netamount: "subtotal", net: "subtotal",
+      tax: "tax", taxamount: "tax", salestax: "tax", vat: "tax", gst: "tax",
+      total: "total", amount: "total", invoicetotal: "total", grandtotal: "total", invoiceamount: "total",
+      totalamount: "total", totaldue: "total", amountdue: "total", balance: "total", balancedue: "total",
+      billed: "total", billedamount: "total", feesbilled: "total", chargesbilled: "total",
+      amountpaid: "amount_paid", paid: "amount_paid", paidamount: "amount_paid", paymentsreceived: "amount_paid",
+      payments: "amount_paid", feespaid: "amount_paid", totalpaid: "amount_paid",
+      notes: "notes", memo: "notes", description: "notes", comments: "notes",
     },
     numeric: ["subtotal", "tax", "total", "amount_paid"],
     dateCols: ["issue_date", "due_date"],