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Tax season without the headache.
Auto-calculate VAT, WHT, and CIT as you trade.
OgaOS computes your Nigerian tax obligations in real time based on your transactions. Whether it's 7.5% VAT, 5–10% withholding tax, or company income tax — the numbers are always ready when FIRS comes knocking.
Tax Calculator
VAT · WHT · CIT
VAT (7.5%)
₦37,500
WHT (5%)
₦25,000
CIT (20%)
₦100,000
Total Tax
₦162,500
Net after tax
₦337,500
Why it works for Nigerian SMEs
Built around how business actually happens here — cash, credit, WhatsApp, and hustle.
Auto-calculates VAT at 7.5% on every qualifying transaction
WHT computed at 5% for goods and 10% for services
CIT estimated at 0%, 20%, or 30% based on annual turnover
Net-after-tax shown instantly for every transaction
Monthly and annual tax summaries ready to export
No accountant needed for day-to-day tax awareness
Disclaimer prompts remind you to consult for filings
Data is FIRS-ready — walk in prepared, not panicked
How it works
Three steps. No wahala.
Enter the transaction amount
Type in the amount for any transaction — a sale, service fee, or supplier payment. Select Goods or Services to apply the correct WHT rate.
Add your annual turnover
OgaOS uses your estimated annual turnover to determine your CIT band — 0% for small businesses under ₦25M, scaling up from there.
Get your full breakdown instantly
VAT, WHT, CIT, and net-after-tax are computed live. Export the summary or use it as a reference for your accountant or FIRS filing.
Ready to try Tax Calculation?
Join thousands of Nigerian business owners already using OgaOS. Free to start, no credit card needed.