Advance Corporation Tax, usually shortened to ACT, was a former UK tax mechanism under which a company paid tax when it distributed dividends. The payment was treated as an advance against the company’s mainstream corporation tax liability.
What The System Tried To Do
ACT formed part of an older dividend-tax structure that linked company-level tax payments to shareholder taxation. Instead of waiting for the full corporation-tax settlement alone, the system required part of the tax to be paid at the point of dividend distribution.
Basic Mechanics
In a simplified representation, if D is the dividend paid and \tau is the ACT rate, then:
[ ACT = \tau D ]
If the firm’s gross corporation-tax liability on profits is CT^{gross}, the net liability after crediting ACT can be written as:
[ CT^{net} = \max(CT^{gross} - ACT, 0) ]
The institutional details were more complex than this shorthand, but the economic idea is straightforward: dividend payments triggered an immediate tax outflow.
Why It Affected Corporate Decisions
Because ACT had a cash-flow effect at the moment dividends were paid, it could influence:
- dividend policy versus retained earnings
- the timing of distributions
- firms with low current taxable profits but pressure to keep dividends stable
- investors differently depending on their tax position
That made ACT more than a technical tax rule. It affected how firms financed growth and how they balanced shareholder payouts against internal funding.
Why It Disappeared
The UK abolished ACT in 1999 as part of wider reform of dividend taxation and the relationship between company taxation and shareholder tax credits. For modern readers, the main value of studying ACT is understanding how tax design can shape payout policy and the incidence of corporate taxation.