How Are Stock Investment Profits Taxed in Nigeria? Do Brokers Deduct Taxes or Do Investors Pay?

This is a very important question—and a lot of Nigerian investors misunderstand it, so I’ll explain it clearly and practically.
💰 How stock investment profits are taxed in Nigeria
First, the key principle:
In Nigeria, capital gains from shares are generally taxed under Capital Gains Tax (CGT).
This is governed by the Capital Gains Tax Act Nigeria.
📊 1. What is taxed?
You are taxed only when you make a profit from selling shares, not just holding them.
Example:
Buy shares = ₦100,000
Sell shares = ₦150,000
Profit = ₦50,000
👉 Tax applies to the ₦50,000 gain (not your full money)
📉 2. Tax rate on shares in Nigeria
Standard Capital Gains Tax = 10%
So:
₦50,000 profit → ₦5,000 tax (theoretically)
⚠️ BUT HERE IS THE IMPORTANT REALITY
For listed shares on the Nigerian Exchange:
👉 In practice, most stock trades on the NGX are currently exempt from Capital Gains Tax for individuals.
This means:
Many retail investors pay 0% CGT on listed shares
But rules can change and corporate investors may still be affected differently
🧾 3. Do brokers deduct the tax automatically?
❌ No—stock brokers do NOT usually deduct Capital Gains Tax.
Brokers like:
Stanbic IBTC Stockbrokers
Chapel Hill Denham
👉 They only:
Execute your trades
Deduct transaction fees and commissions
Settle trades (T+2 system)
🧠 So who is responsible for tax?
In Nigeria system:
🔹 1. Individual responsibility (in theory)
You are supposed to:
Calculate your capital gains
Declare it
Pay tax to the Federal Inland Revenue Service
This is under the Federal Inland Revenue Service (FIRS).
🔹 2. But in real practice:
Most retail investors do NOT file CGT returns for shares
Enforcement is still developing
Brokers don’t automatically handle CGT for individuals
🧾 4. What about other taxes on stocks?
Even if CGT is low/zero for many cases, you may still face:
✔️ Transaction charges (not tax)
SEC fee
NSE/NGX fees
CSCS charges
Brokerage commission
👉 These are deducted automatically by brokers
✔️ Dividends (important)
When companies pay dividends:
A withholding tax (usually 10%) is deducted at source
You receive net dividend
Example:
Dividend = ₦1,000
Tax = ₦100
You receive = ₦900
📌 5. Simple breakdown (very important)
Type
Who deducts?
When?
Capital gains tax
Usually investor (theory)
After selling
Dividend tax
Company/broker
Before payment
Fees/charges
Broker automatically
At transaction
🧠 6. Key misunderstanding to avoid
Many people think:
“Broker will handle all taxes for me”
❌ Not true
Brokers only handle:
Execution
Settlement
Fees
Not full tax compliance.
🔚 Final simple explanation
You only pay tax when you sell at a profit
Brokers do NOT usually deduct capital gains tax
Government expects you to declare it, but enforcement is limited for retail investors
Dividend tax is deducted automatically
Fees are always deducted by brokers
✔️ Practical advice for you
Since you’re actively investing:
👉 Don’t overthink CGT for now
👉 Focus more on:
Good entry price
Diversification
Long-term holding
Tax becomes more important when your portfolio grows significantly.