Stamp Duty Calculator
Stamp duty is the mandatory fee you pay to make a document legally binding, like officially registering your major life decisions. Nobody likes surprise fees, especially for huge purchases like property. Use this calculator to know the cost upfront, so you can stop stressing about hidden tax charges.
Stamp Duty Calculator
Nigeria Tax Act 2025 • Document Registration
How to Use the Nigeria Stamp Duty Calculator
Registering legal documents in Nigeria often involves hidden costs that catch people off guard. If you miscalculate your stamp duty, your document might not be legally admissible in court or you could face stiff late-payment penalties. This calculator removes the guesswork by applying the latest Nigeria tax rates to your transactions. You can plan your budget accurately and ensure your property or business deals are fully compliant with the law.
What is this tool?
The Nigeria Stamp Duty Calculator is a digital assistant that computes the tax due on legal instruments and agreements.
- Inputs: Document type (property sale, mortgage, shares, or loans) and the total transaction value.
- Outputs: The exact stamp duty payable, the applicable percentage rate, and any relevant tax exemptions.
Key Features
- Threshold Detection: Automatically flags transactions that are too small to be taxed.
- Ad Valorem Rates: Includes the 1.5% property rate and the 0.375% mortgage rate.
- Party Identification: Lists which person or entity is responsible for the payment.
- Mobile-Friendly Design: Works on any smartphone for quick on-site calculations.
Prerequisites
- The final agreed value of the transaction in Naira.
- The specific nature of the document (e.g., is it a deed of assignment or a mortgage bond?).
- Confirmation of the parties involved (buyer vs. lender).
Step-by-Step Guide
1. Select the Document Type
Choose the category that matches your legal paperwork from the top grid. For a house purchase, pick Property Sale. For a bank loan secured by property, pick Mortgage. The selected box will turn red.
Common Error: Selecting "Property Sale" for a rental agreement. This calculator focuses on capital transfers and securities, not short-term tenancies.
2. Enter the Transaction Amount
Input the total value of the deal into the Transaction Amount (₦) field. Use the full figure without adding any commas or symbols.
Common Error: Entering only the deposit amount instead of the total purchase price. Tax authorities calculate duty on the full contract value.
3. Identify the Paying Party
Select who is responsible for the payment from the dropdown menu. Usually, the buyer or the person receiving the security pays the duty.
Common Error: Leaving the default selection when the contract explicitly states the other party will handle all taxes.
4. Click Calculate Stamp Duty
Press the green Calculate Stamp Duty button. The tool processes the math and brings the results into view immediately.
5. Review the Results Dashboard
Read the Stamp Duty Payable figure in the red box. If your transaction is below the legal threshold, a green box will appear instead to tell you that you are exempt.
Who Needs This Tool?
| User Group | Problem | Benefit | Tip |
| Home Buyers | Surprised by extra fees during the closing process. | Budget for the exact tax before signing the deed. | Keep your payment receipt; you need it to register your title at the Land Registry. |
| Startup Founders | Unsure of costs when increasing company share capital. | Calculate the 0.75% duty on new shares instantly. | Check if your state has additional local levies on top of federal duty. |
| Lawyers | Manually calculating fractions like 0.375% for clients. | Saves time and eliminates simple math errors. | Always round up to the nearest Naira to avoid underpayment flags. |
| Investors | Assessing the total cost of a commercial property loan. | Reveals the tax impact on large-scale financing. | Use the "Exemption Notice" feature to verify if small investments are tax-free. |
Common Mistakes to Avoid
- Using the Wrong Rate for Shares: Many people assume all business taxes are 1.5%. Share capital is actually 0.75%. Using the wrong rate leads to overpayment.
- Ignoring the Exemption Threshold: For certain properties, transactions under 10 million Naira may be exempt. Don't pay if you don't have to.
Mixing up Mortgage and Loan Capital: A mortgage has a rate of 0.375% while general loan capital is 0.125%. Verify the document title before clicking.