Right, let me see if I can get this right…
I can’t remember how it was when I started though… 😕 You tell them what your net profit was (if you’re filing for as a self-employed sole trader) and they tell you how much tax you owe. They will then charge you next year based on these earnings. Say, your tax for one year was £5k, then your tax for the next year would be charged at £2.5k in January and another £2.5k in July (payments on account). Each time you file, they make the changes on account for your next Jan & July payments in accordance with your earnings going up or down.
So for you, you will be filing in 2014/15 for your 2013/2014 earnings. You will have a tax bill to pay in January 2015 PLUS a payment on account for what tax you should be paying for the coming year. You should, in theory, say put away 20% of each invoice paid (unless a massive chunk is materials) ready to pay that bill. I assume that if you file early in 2014/15, they’ll tell you how much you owe and will happily take payment anytime, or in DDs up until January.
craigxxl…please clarify this for me. 🙂