[Marginal reliefU.K.
279BCompany with only ring fence profitsU.K.
(1)This section applies if—
(a)a company is UK resident in an accounting period,
[(ab)it is not a close investment-holding company in the period,]
(b)its augmented profits of the accounting period—
(i)exceed the lower limit, but
(ii)do not exceed the upper limit, and
(c)its augmented profits of that period consist exclusively of ring fence profits.
(2)The corporation tax charged on the company's taxable total profits of the accounting period is reduced by an amount equal to—
where—
R is the [ring fence marginal] relief fraction,
A is the amount of the augmented profits, and
N is the amount of the taxable total profits.
(3)In this Chapter “the [ring fence marginal] relief fraction” means 11/400ths.
279CCompany with ring fence profits and other profitsU.K.
(1)This section applies if—
(a)a company is UK resident in an accounting period,
[(ab)it is not a close investment-holding company in the period,]
(b)its augmented profits of the accounting period—
(i)exceed the lower limit, but
(ii)do not exceed the upper limit, and
(c)its augmented profits of that period consist of both ring fence profits and other profits.
[(2)The corporation tax charged on the company's taxable total profits of the accounting period is reduced by the total of—
(a)the sum equal to the ring fence marginal relief fraction of the ring fence amount, and
(b)the sum equal to the standard marginal relief fraction of the remaining amount.]
279DThe ring fence amountU.K.
(1)In section 279C “the ring fence amount” means the amount given by the formula—
(2)In this section—
UR is the amount given by multiplying the upper limit by—
AR is the total amount of any ring fence profits that form part of the augmented profits of the accounting period,
NR is the total amount of any ring fence profits that form part of the taxable total profits of the accounting period, and
A is the amount of the augmented profits of the accounting period.
[279DAThe remaining amountU.K.
(1)In section 279C “the remaining amount” means the amount given by the formula—
(2)In this section—
UZ is the amount given by multiplying the upper limit by—
AZ is the total amount of any profits other than ring fence profits that form part of the augmented profits of the accounting period,
NZ is the total amount of any profits other than ring fence profits that form part of the taxable total profits of the accounting period, and
A is the amount of the augmented profits of the accounting period.]]