Tax credits are available to those who are working at least 16 hours a week, although if you do not have any children under 16 in the household (or up to 18 if still at school) you will need to be working for 30 hours a week.
For a couple claiming for themselves only, the entitlement to tax credits ends at income of £18,000, but if your income this year has been reduced by either the recession or claims for Annual Investment Allowance, then a single year of very low income could give rise to two years in which tax credits can be claimed – which could amount to a total of up to £9,050. This would be the case even if the income returned to its former level in the second year because increases in income of less than £25,000 are ignored when re-computing tax credits.
Tax credit awards cannot be backdated by more than three months so you must claim early in the tax year to get the full entitlement for the year. Once you have started claiming, a renewal pack is sent out at the end of the year. This allows the claim to ‘roll on’ from one year to the next.
Changes in circumstances such as giving up work must be notified within one month. If you are late telling HMRC about a change that adversely affects your entitlement you can incur a significant amount of tax credit debt, which in some cases can be demanded in a single prepayment demand.



