You can deposit cash into your Starling account at any Post Office branch. If you have a personal or joint account, it's free. If you have a business account or a sole trader account there’s a 0.3% charge (minimum charge of £3) for each deposit. Just insert your debit card at the counter, confirm the amount and the cash will instantly appear in your account.
Please also note that the amount you can deposit can vary across Post Office branches, and some smaller branches may have a lower limit. If you’re depositing more than £2,000, it's best to check first with the branch.
If you want to check how much you’ve deposited through the Post Office so far, open your mobile app to the Home screen and Swipe up for transactions then search for “Post Office Banking Services”.