Company Income Tax Calculator
Calculate your CIT liability based on Nigeria's three-tier system. Small companies pay 0%. Find out what you owe.
Your Business Details
Your total annual revenue/sales
Operating costs, salaries, rent, utilities, etc.
🎉
Small
< ₦25M
0%
📊
Medium
₦25M - ₦100M
20%
🏢
Large
> ₦100M
30%
Estimated CIT Payable
₦3,000,000
CIT Calculation
Minimum Tax Check
✓ You pay the higher: ₦3,000,000
Effective Tax Rate
6.7%
💡 Insights
- • You pay 20% instead of 30% — saving you ₦1,500,000 compared to large company rates.
Understanding Nigeria's CIT Tiers
SMALL COMPANY
Turnover < ₦25 Million
CIT Rate: 0%
Yes, really. Zero percent. This is a huge incentive for small businesses in Nigeria.
MEDIUM COMPANY
Turnover ₦25M - ₦100 Million
CIT Rate: 20%
A reduced rate to support growing businesses as they scale up.
LARGE COMPANY
Turnover > ₦100 Million
CIT Rate: 30%
The standard corporate rate. Plus 2.5% Tertiary Education Tax.
What Can You Deduct?
FULLY DEDUCTIBLE
- • Staff salaries and wages
- • Rent and utilities
- • Professional fees
- • Marketing and advertising
- • Office supplies
- • Business travel
- • Insurance premiums
- • Bad debts (written off)
- • Repairs and maintenance
CAPITAL ALLOWANCES
- • Buildings: 10%/year
- • Plant & machinery: 25%/year
- • Motor vehicles: 25%/year
- • Furniture: 20%/year
- • Computer equipment: 25%/year
NOT DEDUCTIBLE
- • Personal expenses
- • Entertainment (limited)
- • Fines and penalties
- • Donations (above limits)
- • Capital expenditure (use allowances)
When and How to File
Within 18 Months of Incorporation
Register with FIRS and obtain Tax Identification Number (TIN).
Within 6 Months of Year-End
File annual CIT returns with audited financial statements.
Quarterly Installments
Large companies pay CIT in quarterly installments.
Penalties for Late Filing
₦25,000 for first month, ₦5,000 for each subsequent month, plus interest on unpaid tax.
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