MoneySavingExpert.com site explaining exactly why this is happening and how you can avoid being stung by an extra cost.He says: "It's a non-repayable, taxable grant, worth up to £6,570, made up of 3mths' worth (of 70%) of average trading profits."Martin adds: "It is made up of a single payment made up of 70% of three months' worth of average monthly trading profits over three months capped at £2,190/mth.