Tax Adviser Certification study materials
Tax Adviser Certification study resources

Tax Adviser Certification key terms

Tax Adviser Certification · Get comfortable with the vocabulary.

Taxable Income

The amount left after allowed deductions and exemptions are subtracted from total income for a year. It is the base on which income tax rates are applied.

Related: Total Income, Deduction, Tax Rate Slab
Total Income

The sum of all earnings from every head of income before deductions and exemptions are applied. It is the starting figure from which taxable income is computed.

Related: Taxable Income, Heads of Income, Set-Off of Losses
Heads of Income

The statutory categories into which income is classified, such as salary, business profits, capital gains, and other sources. Each head has its own computation rules and deduction limits.

Related: Total Income, Capital Gain, Depreciation
Residential Status

The test that determines whether a person is taxed as a resident or non-resident for a tax year. It depends on days present and prior-year presence, and it affects the scope of taxable income.

Related: Taxable Income, Double Taxation Agreement
Deduction

An amount allowed by law to be subtracted from gross income or receipts in computing taxable income. It must fall within a specific statutory provision to be claimable.

Related: Taxable Income, Exemption, Depreciation
Exemption

A statutory exclusion that removes certain income or persons from the charge to tax entirely. Unlike a deduction, it is not netted against income but ignored.

Related: Deduction, Taxable Income
Capital Gain

The profit realised when a capital asset is transferred for more than its cost, adjusted for permitted improvements. It is taxed separately from ordinary income, often at distinct rates and holding-period rules.

Related: Cost Base, Heads of Income, Holding Period
Cost Base

The acquisition cost of an asset plus incidental purchase costs, used to measure gain or loss on disposal. It may be adjusted for improvements and certain indexation reliefs.

Related: Capital Gain, Holding Period
Holding Period

The length of time an asset is owned before disposal. It determines whether a gain is short-term or long-term and which tax rate and reliefs apply.

Related: Capital Gain, Cost Base
Depreciation

The annual write-off of an asset's cost over its useful life in accounts. Tax law often replaces it with separate capital allowance rules, so book and tax figures can differ.

Related: Capital Allowance, Deduction
Capital Allowance

A tax deduction for the cost of qualifying fixed assets, given in place of accounting depreciation. Rates and pooling rules are set by statute and vary by asset class.

Related: Depreciation, Deduction
Set-Off of Losses

The mechanism allowing a loss in one source or year to reduce taxable income elsewhere, subject to statutory limits. Rules differ for business, capital, and speculative losses.

Related: Total Income, Carry-Forward Loss
Carry-Forward Loss

An unused loss that is preserved and applied against profits of later years. Time limits and continuity-of-ownership conditions usually apply.

Related: Set-Off of Losses
Tax Rate Slab

A band of taxable income to which a particular marginal rate applies. Progressive systems stack slabs so higher income portions face higher rates.

Related: Taxable Income, Marginal Relief
Marginal Relief

A mechanism that softens the jump in tax when income crosses into a higher rate band or loses a benefit. It phases in the extra charge gradually rather than at a cliff edge.

Related: Tax Rate Slab, Surcharge
Surcharge

An additional charge levied on the tax amount, not on income, typically above a threshold. It is calculated as a percentage of the basic tax liability.

Related: Tax Rate Slab, Marginal Relief
Advance Tax

Tax paid in instalments during the year based on estimated income, rather than in a single final payment. Shortfalls can attract interest penalties.

Related: Withholding Tax, Tax Deducted at Source
Withholding Tax

Tax collected at the point of payment by the payer and remitted to the authority on the recipient's behalf. It acts as a prepayment of the recipient's final liability.

Related: Tax Deducted at Source, Advance Tax
Tax Deducted at Source

A domestic withholding mechanism requiring specified payers to deduct tax on designated payments such as salaries, rent, or professional fees. Credit for the deduction is given to the payee.

Related: Withholding Tax, Advance Tax
Double Taxation Agreement

A bilateral treaty allocating taxing rights between two countries to prevent the same income being taxed twice. It sets tie-breaker rules, reduced withholding rates, and relief methods.

Related: Residential Status, Foreign Tax Credit
Foreign Tax Credit

A relief allowing tax paid abroad on foreign-source income to be credited against domestic tax on the same income. It is usually capped at the domestic tax attributable to that income.

Related: Double Taxation Agreement, Residential Status
Transfer Pricing

The rules setting prices for transactions between related entities in different tax jurisdictions. They require dealings to be priced as if between independent parties, at arm's length.

Related: Arm's Length Principle, Permanent Establishment
Arm's Length Principle

The standard requiring related-party transactions to be priced as comparable independent parties would agree. It is the benchmark against which transfer pricing is tested and adjusted.

Related: Transfer Pricing
Permanent Establishment

A fixed place of business or dependent agent through which a foreign enterprise carries on business in a country. Its existence gives that country taxing rights over attributable profits.

Related: Transfer Pricing, Double Taxation Agreement
Tax Avoidance

Arranging affairs to reduce tax within the letter of the law but contrary to its purpose. Statutes and general anti-avoidance rules may disregard or recharacterise such arrangements.

Related: General Anti-Avoidance Rule, Tax Evasion
General Anti-Avoidance Rule

A broad statutory provision empowering the revenue to counteract arrangements whose main purpose is to obtain a tax advantage. It can recharacterise transactions or deny the benefit.

Related: Tax Avoidance, Tax Evasion
Tax Evasion

The illegal non-payment or underpayment of tax through concealment, false statements, or failure to report. It exposes the taxpayer to penalties and criminal prosecution.

Related: Tax Avoidance, General Anti-Avoidance Rule
Assessment

The formal process by which the revenue determines the tax payable, either accepting a filed return or issuing its own computation. It creates the enforceable demand for tax.

Related: Self-Assessment, Tax Audit
Self-Assessment

A system where the taxpayer computes and declares its own liability, with the revenue verifying later through risk checks. Penalties apply for incorrect or late returns.

Related: Assessment, Tax Audit
Tax Audit

A examination of a taxpayer's records and returns to verify the correctness of reported income and tax. It may result in additional assessment, penalties, or no change.

Related: Assessment, Self-Assessment
Value Added Tax

A multi-stage tax on the value added at each stage of supply of goods or services. Businesses collect it from customers and claim credit for tax paid on their inputs.

Related: Input Tax Credit, Output Tax, Taxable Supply
Input Tax Credit

The credit a registered business claims for tax paid on purchases used in its taxable supplies. It prevents cascading and is usually set against output tax for the period.

Related: Output Tax, Value Added Tax, Reverse Charge
Output Tax

The tax a registered business charges on its own taxable supplies. It is the liability against which input tax credit is set to arrive at the net amount payable.

Related: Input Tax Credit, Taxable Supply
Taxable Supply

A supply of goods or services that falls within the charge to indirect tax at a positive rate. It contrasts with exempt and zero-rated supplies, which are treated differently for credit purposes.

Related: Exempt Supply, Zero-Rated Supply, Place of Supply
Exempt Supply

A supply that is outside the charge to tax, so no tax is charged and no input credit is normally allowed. Businesses making only exempt supplies generally cannot register or recover input tax.

Related: Zero-Rated Supply, Input Tax Credit
Zero-Rated Supply

A taxable supply charged at a rate of zero percent, such as certain exports. Unlike exemption, it keeps the supply within the tax system so input credit remains recoverable.

Related: Exempt Supply, Input Tax Credit, Export
Place of Supply

The rule determining which jurisdiction may tax a cross-border supply. It decides whether a transaction is domestic or foreign and thus whether local tax applies.

Related: Taxable Supply, Export, Reverse Charge
Reverse Charge

A mechanism shifting the duty to account for tax from the supplier to the recipient. It commonly applies to imported services and certain domestic transactions.

Related: Input Tax Credit, Place of Supply, Import
Registration Threshold

The turnover level above which a business must register for indirect tax. Below it, registration is usually optional, and crossing it triggers compliance obligations.

Related: Taxable Supply, Value Added Tax
Filing Period

The recurring interval, often monthly or quarterly, for which a registered business reports supplies, claims credit, and pays net tax. Late filing attracts interest and penalties.

Related: Input Tax Credit, Output Tax
Customs Duty

A tax levied on goods entering or leaving a customs territory, based on value, quantity, or a combination. Rates depend on the tariff classification and origin of the goods.

Related: Import, Export, Tariff Classification
Tariff Classification

The process of assigning goods to a code in the customs nomenclature, which fixes the applicable duty rate and rules. Misclassification can lead to underpayment and penalties.

Related: Customs Duty, Import
Import

The bringing of goods or services into a tax jurisdiction from abroad. Imports typically attract customs duty and often indirect tax at the border.

Related: Customs Duty, Reverse Charge, Export
Export

The sending of goods or services out of a tax jurisdiction. Exports are commonly zero-rated or exempt to keep domestic tax out of international trade.

Related: Zero-Rated Supply, Customs Duty, Import