On 1 Feb 2010 I started a self-employed consultancy business, which has generated profits of about £40,000 in the first four months. I also run my own company and let a few properties. The income from my company and the rents have been much lower in 2009/10 compared to the previous year. Do I have to take into account the income from my new consultancy business when I make my payment on account for 2009/10 due on 31 July 2010?
You do need to take into account the income from your new consultancy business when making your next payment on account for income tax. However, the opening year rules for self-employment will apply, so only two months of your first period of the consultancy business profits are taxed in 2009/10. You can apply to reduce the 2009/10 payment on account if your total taxable income for the 2009/10 tax year, including the two months of consultancy profits, has dropped below the total taxable income for 2008/09. It doesn’t matter if your income for 2010/11 rises again.