Taxation

Ability to Pay
The tax principle that people with greater economic capacity should bear more of the tax burden.
Accelerated Depreciation
A tax or accounting method that allows larger depreciation deductions in the early years of an asset's life.
Ad Valorem Tax
A tax charged as a percentage of the value or price of the item being taxed.
Advance Corporation Tax
A former UK tax system under which companies paid tax when distributing dividends, with the payment credited against corporation tax.
Arm's-Length Price
The price unrelated parties would agree to under comparable market conditions.
Average Tax Rate
Total tax paid divided by the total tax base.
Avoidance
Lawful structuring of behavior or transactions to reduce tax liability.
Base Erosion and Profit Shifting (BEPS)
Tax-planning strategies that reduce taxable profit in higher-tax countries and shift it elsewhere.
Basic Rate
In UK taxation, the basic rate is the standard marginal income-tax rate applied to taxable income within the basic-rate band.
Before-Tax Income
Before-tax income is income received before direct taxes are deducted.
Benefit Principle
The benefit principle says taxes or charges should, as far as possible, be paid by those who benefit from the public spending or service.
Income Tax
A tax on labor and capital income used to fund government spending and shape distribution outcomes.
Lump-Sum Tax
A fixed tax amount that does not depend on a taxpayer's choices; a benchmark for non-distortionary taxation.