diff --git a/src/components/TransactionEditor.vue b/src/components/TransactionEditor.vue
index d037b94..9518de2 100644
--- a/src/components/TransactionEditor.vue
+++ b/src/components/TransactionEditor.vue
@@ -1,6 +1,6 @@
 <!--
 	DrCr: Web-based double-entry bookkeeping framework
-	Copyright (C) 2022–2024  Lee Yingtong Li (RunasSudo)
+	Copyright (C) 2022–2025  Lee Yingtong Li (RunasSudo)
 	
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU Affero General Public License as published by
@@ -108,13 +108,14 @@
 	
 	import { ref } from 'vue';
 	
-	import { DT_FORMAT, Transaction, db, deserialiseAmount } from '../db.ts';
+	import { DT_FORMAT, Posting, Transaction, db, deserialiseAmount } from '../db.ts';
 	import ComboBoxAccounts from './ComboBoxAccounts.vue';
 	
 	interface EditingPosting {
 		id: number | null,
 		description: string | null,
 		account: string,
+		originalAccount: string | null,
 		sign: string,  // Keep track of Dr/Cr status so this can be independently changed in the UI
 		amount_abs: string,
 	}
@@ -135,6 +136,7 @@
 			id: null,
 			description: null,
 			account: '',
+			originalAccount: null,
 			sign: posting.sign,  // Create the new posting with the same sign as the entry clicked on
 			amount_abs: ''
 		});
@@ -158,9 +160,10 @@
 				id: posting.id,
 				description: posting.description,
 				account: posting.account,
+				originalAccount: posting.originalAccount,
 				quantity: posting.sign === 'dr' ? amount_abs.quantity : -amount_abs.quantity,
 				commodity: amount_abs.commodity
-			});
+			} as Posting);
 		}
 		
 		// Validate transaction
@@ -278,6 +281,23 @@
 				WHERE postings.id = p.id`,
 				[newTransaction.dt, posting.account]
 			);
+			
+			// Must also invalidate running balance of original account, if the account has changed
+			const originalAccount = (posting as unknown as EditingPosting).originalAccount;
+			if (originalAccount && originalAccount !== posting.account) {
+				await dbTransaction.execute(
+					`UPDATE postings
+					SET running_balance = NULL
+					FROM (
+						SELECT postings.id
+						FROM transactions
+						JOIN postings ON transactions.id = postings.transaction_id
+						WHERE DATE(dt) >= DATE($1) AND account = $2
+					) p
+					WHERE postings.id = p.id`,
+					[newTransaction.dt, (posting as unknown as EditingPosting).originalAccount]
+				);
+			}
 		}
 		
 		await dbTransaction.commit();
diff --git a/src/pages/EditTransactionView.vue b/src/pages/EditTransactionView.vue
index c4f1272..7c17281 100644
--- a/src/pages/EditTransactionView.vue
+++ b/src/pages/EditTransactionView.vue
@@ -1,6 +1,6 @@
 <!--
 	DrCr: Web-based double-entry bookkeeping framework
-	Copyright (C) 2022–2024  Lee Yingtong Li (RunasSudo)
+	Copyright (C) 2022–2025  Lee Yingtong Li (RunasSudo)
 	
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU Affero General Public License as published by
@@ -61,8 +61,9 @@
 		// Format dt
 		rawTransaction.dt = dayjs(rawTransaction.dt).format('YYYY-MM-DD');
 		
-		// Initialise sign and amount_abs
+		// Initialise originalAccount, sign and amount_abs
 		for (const posting of rawTransaction.postings) {
+			posting.originalAccount = posting.account;
 			posting.sign = posting.quantity >= 0 ? 'dr' : 'cr';
 			posting.amount_abs = serialiseAmount(Math.abs(posting.quantity), posting.commodity);
 		}
diff --git a/src/pages/NewTransactionView.vue b/src/pages/NewTransactionView.vue
index a374cc8..2dff566 100644
--- a/src/pages/NewTransactionView.vue
+++ b/src/pages/NewTransactionView.vue
@@ -1,6 +1,6 @@
 <!--
 	DrCr: Web-based double-entry bookkeeping framework
-	Copyright (C) 2022–2024  Lee Yingtong Li (RunasSudo)
+	Copyright (C) 2022–2025  Lee Yingtong Li (RunasSudo)
 	
 	This program is free software: you can redistribute it and/or modify
 	it under the terms of the GNU Affero General Public License as published by
@@ -42,6 +42,7 @@
 				id: null,
 				description: null,
 				account: '',
+				originalAccount: null,
 				sign: 'dr',
 				amount_abs: '',
 			},
@@ -49,6 +50,7 @@
 				id: null,
 				description: null,
 				account: '',
+				originalAccount: null,
 				sign: 'cr',
 				amount_abs: '',
 			}