(1)General betting duty is charged on a non-financial spread bet made with a bookmaker who is in the United Kingdom.
(2)It is charged at the rate of 10% of the bookmaker’s profits on non-financial spread bets for an accounting period.
(3)The bookmaker’s profits on non-financial spread bets for an accounting period are the aggregate of—
(a)the amount of the bookmaker’s ordinary profits for the period in respect of non-financial spread bets (calculated in accordance with section 131), and
(b)the amount of the bookmaker’s retained winnings profits for the period in respect of non-financial spread bets (calculated in accordance with section 132).
(4)Where the calculation for an accounting period under subsection (3) produces a negative amount—
(a)the bookmaker’s profits on non-financial spread bets for the accounting period are treated as nil, and
(b)the amount produced by the calculation may be carried forward in reduction of the bookmaker’s profits on non-financial spread bets for one or more later accounting periods.