Think business, and you think Microsoft Office, and Office 365 is now the preferred way that Microsoft would like you to buy its productivity suite, thank you very much – by paying them a monthly subscription fee. Right now will set you back £7.90 + VAT per user per month (if you pay annually) or £9.50 + VAT per user per month (if you pay month-to-month). In the US those prices are, and if you want to try before you buy, there is a 30-day free trial available. There is a Business Premium package too: that's £9.40 + VAT (or $12.50) per user per month (annual plan) or £11.30 + VAT ($15) per user per month (on the monthly plan).