diff --git a/default_thai_company/public/js/payment_entry.js b/default_thai_company/public/js/payment_entry.js
index 5f4a827..5c9a9d3 100644
--- a/default_thai_company/public/js/payment_entry.js
+++ b/default_thai_company/public/js/payment_entry.js
@@ -1,4 +1,18 @@
 frappe.ui.form.on("Payment Entry", {
+	onload(frm) {
+		if (frm.is_new() && frm.doc.posting_date && !frm.doc.reference_date) {
+			frm.set_value("reference_date", frm.doc.posting_date);
+		}
+	},
+
+	// Cheque/Reference Date follows Posting Date; the field stays editable for the
+	// cases where the cheque is dated differently.
+	posting_date(frm) {
+		if (frm.doc.posting_date) {
+			frm.set_value("reference_date", frm.doc.posting_date);
+		}
+	},
+
 	apply_tax_withholding_amount(frm) {
 		if (frm.doc.party_type !== "Customer" || frm.doc.payment_type !== "Receive") return;
 		if (!frm.doc.apply_tax_withholding_amount) {