Audu Ayuba & Co.
Chartered Accountants · ICAN Member Firm
Taxation & Statutory

Capital Allowance & Tax Depreciation Calculator

Nigerian Statute: Companies Income Tax Act (CITA Second Schedule)

Computes qualifying capital expenditure Initial & Annual Allowances, Tax Written Down Value (TWDV), 66.67% assessable profit restriction, and balancing charges under CITA Second Schedule.

Computational Framework & Statutory Formulas

Initial Allowance (Year of Purchase)
Initial Allowance = Qualifying Capital Cost × Initial Allowance Rate (%)
One-off first-year tax deduction on newly acquired qualifying assets.
Annual Allowance (Yearly Writing-Down)
Annual Allowance = (Cost - Initial Allowance - ₦10 Retention) / Remaining Useful Tax Life
Annual spread of allowable capital deductions over the statutory asset life, retaining ₦10 in the books until disposal.
Tax Written Down Value (TWDV)
TWDV = Cost - Cumulative Initial & Annual Allowances Claimed
The remaining tax carrying amount of the asset used for future capital allowance claims and balancing adjustments.

Nigerian Economic & Statutory Context

In Nigeria, commercial depreciation charged in financial accounts is disallowed for tax purposes under CITA Section 27. Instead, companies claim Capital Allowances on Qualifying Capital Expenditure (QCE) under the Second Schedule to CITA. For non-manufacturing and non-agricultural companies, total capital allowances claimed in any tax year cannot exceed two-thirds (66.67%) of assessable profit.

Frequently Asked Questions (FAQ)

Why is accounting depreciation added back to profit in Nigerian tax computations?

Accounting depreciation reflects subjective management estimates of useful life and residual value. Under Nigerian tax law (CITA Section 27), accounting depreciation is strictly disallowable and must be added back, while statutory Capital Allowances are claimed according to uniform legislated rates.

What is the ₦10 retention rule in Nigerian capital allowance schedules?

Under Nigerian tax law, an asset is not written down to zero. A nominal sum of ₦10 is permanently retained in the Tax Written Down Value (TWDV) of the asset until it is physically sold, disposed of, or scrapped, confirming the asset is still in active business use.

Which companies are exempt from the 66.67% capital allowance restriction?

Under CITA Second Schedule, companies engaged in manufacturing, agricultural business, and agro-allied activities are exempt from the 2/3 (66.67%) restriction and can claim capital allowances up to 100% of their assessable profit.

Related Nigerian Financial Calculators

Company Income Tax (CIT) Calculator → Accounting Book Depreciation Calculator (IAS 16) → Investment Appraisal & Valuation (NPV/IRR/EBITDA) → Comprehensive Accounting Ratios Suite →
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