Your accountant is right, and a company card really does help — but the card is only half the story. Let me take your questions in order.
Is a company card actually better?
Yes, genuinely — not because the card is magic, but because it forces separation at source. With a dedicated business card, one statement equals one reconciliation, and there is no personal noise to untangle. Most banks will issue a business credit card in the company's name (usually with a personal guarantee from you as director). It does not just move the mess elsewhere: it shrinks it, because every line on the statement is presumptively business and your bookkeeper only has to categorise rather than investigate.
If you keep using your personal card
The best-practice approach is a monthly expense routine, not one big journal entry at year end. Each month: list every business item with date, supplier, amount and business purpose; attach or link the receipt; and reimburse yourself from the business so the company's records show the expense and the repayment. Do it monthly so the records are contemporaneous — HMRC and your accountant both prefer expenses recorded when they happen, not reconstructed a year later.
Traps around mixing
Personal spending on the company card can be treated as a taxable benefit or build up an overdrawn director's loan account, which carries its own tax charges if not cleared after the year end. Going the other way — business spending on your personal card — the traps are lost deductions for anything you forget to claim, and disallowed expenses if personal items slip into a claim. In an HMRC enquiry, a mixed-up card statement is exactly where questions start, so clean separation is genuinely protective.
Receipts
Retire the shoebox. Photograph or scan every receipt at the point of purchase — HMRC accepts digital copies, and you must keep records for at least 6 years. Most cloud bookkeeping apps (Xero, QuickBooks and the like, or a capture tool such as Dext) let you snap the receipt and auto-match it to the bank feed line. The discipline that makes it work is a small weekly habit: ten minutes, same day each week, capturing and categorising everything. No backlog, no year-end panic.
A routine that works
Weekly: capture receipts and categorise them. Monthly: reconcile the business card (or your expense claim) to the statement and clear any personal items immediately. Quarterly: a quick review with your accountant so nothing surprising builds up. That cadence is what makes year end boring — which is exactly what you want.
