Income Taxes

Overview

Engineering reference data for Income Taxes in economics.

Key Formulas

Present Value

$PV = \frac{FV}{(1+r)^n}$

Discount a future value to present.

Net Present Value

$NPV = \sum_{t=0}^{n} \frac{C_t}{(1+r)^t}$

Sum of discounted cash flows.

Compound Interest

$FV = PV(1+r)^n$

Future value with compound interest.

Variables

Formulas for Income Taxes

The calculation of taxable income and income taxes involves the following key formulas:

Taxable Income (TI) The total taxable income is the sum of all revenues minus allowable deductions for costs, depreciation, and operating expenses.

$TI = \Sigma R - \Sigma C - \Sigma D - \Sigma OE \quad (1)$

Income Taxes (IT) The income tax owed is the product of the taxable income and the applicable tax rate.

$IT = TI \times t_r \quad (2)$

Key Definitions

The variables in the formulas above are defined as follows:

• TI (Taxable Income): The net income subject to taxation after accounting for all allowable deductions.
• R (Revenues): Total income generated from business operations, sales, or projects.
• C (Operating Costs): Costs directly associated with producing goods or executing projects (e.g., Cost of Goods Sold).
• D (Assets Depreciation): The allocated cost of tangible assets over their useful life, which is a deductible expense.
• OE (Operating Expenses): Indirect costs required to run the business (e.g., rent, utilities, salaries).
• IT (Income Taxes): The total tax liability calculated on the taxable income.
• t_r (Tax Rate): The percentage rate applied to taxable income to determine the income tax owed. This can be a flat rate or a marginal rate.

References

• Original Source