API Reference
Company Income Tax (CIT)
Compute Corporate Income Tax, Tertiary Education Tax (TET), and statutory levies across small, medium, and large companies.
Company Income Tax (CIT)
POST /api/v1/tax/cit
Calculates Companies Income Tax (CIT) under CITA and Finance Acts. Automatically detects corporate turnover classification, applies small company exemptions, computes Tertiary Education Tax (TET at 3%), National Information Technology Development Levy (NITDL), and Police Trust Fund levies.
Required scope: tax:calculate.
Request Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
turnover | number | Yes | — | Total gross turnover/revenue for the financial year. Alias: revenue. |
profit_before_tax | number | Yes | — | Net profit before tax (PBT). Aliases: pbt, profit. |
capital_allowances | number | No | 0 | Qualifying capital allowances claimed for the tax year. |
loss_relief | number | No | 0 | Unrelieved tax losses carried forward from prior years. |
is_telecom_or_financial | boolean | No | false | Whether company is liable for NITDL levy (1% of PBT for telecom/banking/cyber companies with turnover > ₦100m). |
Corporate Turnover Tiers
- Small Company (
turnover < ₦50,000,000): 0% CIT (fully exempt) and 0% TET. - Medium Company (
₦50,000,000 <= turnover <= ₦100,000,000): 20% CIT + 3% TET. - Large Company (
turnover > ₦100,000,000): 30% CIT + 3% TET.
Code Examples
curl -X POST "https://taxnigeria.ng/api/v1/tax/cit" \
-H "Authorization: Bearer txn_your_api_key_here" \
-H "Content-Type: application/json" \
-d '{
"turnover": 120000000,
"profit_before_tax": 25000000,
"capital_allowances": 3000000,
"is_telecom_or_financial": false
}'Response Example (200 OK)
{
"ok": true,
"data": {
"tax_type": "cit",
"turnover": 120000000,
"profit_before_tax": 25000000,
"company_category": "large",
"category_description": "Large Company (Turnover > ₦100,000,000) - 30% CIT + 3% TET",
"cit_rate": "30%",
"cit_payable": 6600000,
"tet_rate": "3%",
"tet_payable": 750000,
"police_trust_fund_levy": 1250,
"nitdl_levy": 0,
"total_tax_payable": 7351250,
"effective_tax_rate": "29.41%",
"spoken_summary": "For a large enterprise with ₦120,000,000 turnover and ₦25,000,000 profit before tax, the CIT liability is ₦6,600,000 (30%) and Tertiary Education Tax is ₦750,000 (3%), totaling ₦7,351,250 in statutory corporate dues.",
"breakdown": {
"assessable_profit": 25000000,
"taxable_profit": 22000000,
"capital_allowances_utilized": 3000000
}
},
"meta": {
"calculation_id": "calc_cit_3f82a17b",
"timestamp": "2026-10-28T13:32:00.000Z",
"latency_ms": 13
}
}