📄 Stamp Duty Calculator

What does this calculator do?

This calculator estimates Turkish stamp duty based on the value of a contract or document and the selected stamp duty rate.

• Calculates stamp duty on a contract or document value.
• Converts per mille rates into a clear monetary amount.
• Helps explain the relationship between taxable base and tax amount.
• Provides a quick estimate before signing or accounting entry.

Example: if the contract value is 100,000 Turkish lira and the selected rate is 9.48 per mille, the basic calculation gives a stamp duty amount of 948 Turkish lira.

What is Damga Vergisi?

Damga Vergisi means stamp duty in Turkey. It is a tax connected to certain contracts, documents, and papers that create legal effects or can be used to prove an obligation or legal relationship.

The word “paper” in this context does not only mean physical paper. It may also refer to a contract, document, or written instrument with legal or evidentiary value. This is why Damga Vergisi often appears in contracts, undertakings, declarations, and certain official or commercial documents.

Not every document is subject to the same rate. The document type, content, value, number of copies, and possible exemptions may all matter.

When does stamp duty apply in Turkey?

Stamp duty usually appears when there is a written contract or document with legal or financial significance. Users often want to estimate the tax before signing a contract or recording a transaction.

Damga Vergisi may be relevant in cases such as:

• Contracts that include a specific monetary value.
• Certain official or commercial documents.
• Some tax declarations.
• Undertakings, protocols, or similar documents.
• Rental, service, sale, construction, or business-related contracts in some cases.
• Certain transactions with companies or public institutions.

However, the document must be checked to determine whether it is actually subject to stamp duty and which rate or amount applies.

How do per mille rates work?

Stamp duty rates in Turkey are often expressed as per mille rates, not percentages. This is one of the most common sources of calculation mistakes.

• 1 per mille means 1 out of 1,000.
• 9.48 per mille means 9.48 out of 1,000.
• To convert a per mille rate into a percentage, divide it by 10.
• 9.48 per mille is approximately 0.948%.

How is stamp duty calculated?

In a proportional stamp duty calculation, the contract or document value is multiplied by the applicable rate.

The general formula is:

Stamp duty amount = Taxable amount × Stamp duty rate

If the rate is given as per mille, the practical formula is:

Stamp duty amount = Taxable amount × Per mille rate ÷ 1000

Example: if the contract value is 100,000 Turkish lira and the rate is 9.48 per mille:

• 100,000 × 9.48 ÷ 1000 = 948 Turkish lira.

So the approximate stamp duty amount is 948 Turkish lira.

Proportional and fixed stamp duty

Damga Vergisi may be proportional or fixed depending on the document type. This distinction matters because the calculation method changes.

• Proportional stamp duty is calculated by applying a rate to the document or contract value.
• Fixed stamp duty is a fixed amount determined by document type.
• Some declarations or papers may be subject to fixed amounts rather than a percentage-like rate.
• Fixed amounts and upper limits may change from year to year.

This calculator is mainly intended to explain basic proportional calculations. For fixed-amount documents, the current official table should be checked.

How to use the stamp duty calculator

To use the calculator, follow these steps:

• Enter the contract or document value.
• Select or enter the applicable stamp duty rate.
• Check whether the rate is a percentage or per mille rate.
• Click the calculate button.
• Review the estimated stamp duty amount.
• Before formal use, verify the document type and official rate.

If you do not know which rate applies, simply entering a random rate into the calculator is not enough. First, the document type and current official rate must be identified.

Why does stamp duty matter in contracts?

Stamp duty can directly affect the cost of a contract. In high-value contracts, even a small-looking per mille rate may create a meaningful tax amount.

When dealing with a contract in Turkey, the following points may matter:

• Whether the contract is subject to stamp duty.
• Whether the contract includes a specific monetary value.
• The applicable stamp duty rate or fixed amount.
• Which party is responsible for the tax.
• Possible exemptions or exceptions.
• The upper limit that may apply to each paper.
• Whether the contract is issued in multiple copies.

If these points are not evaluated correctly, the estimate may differ from the amount due in the official process.

Practical example

Suppose a service contract has a value of 250,000 Turkish lira and the selected stamp duty rate is 9.48 per mille.

The calculation is:

• 250,000 × 9.48 ÷ 1000 = 2,370 Turkish lira.

In this example, the estimated Damga Vergisi amount is 2,370 Turkish lira.

Common mistakes in stamp duty calculation

Common mistakes when calculating stamp duty in Turkey include:

• Treating a per mille rate as a percentage.
• Using one rate for every document type.
• Confusing proportional and fixed stamp duty.
• Using the wrong amount as the taxable base.
• Ignoring multiple copies or multiple documents.
• Not checking possible exemptions or exceptions.
• Using outdated rates after official updates.

These mistakes can be significant in high-value contracts or official document processes.

Accuracy limits of this calculator

This calculator explains the basic calculation logic and provides a quick estimate. It does not decide by itself whether a document is taxable or which final rate applies.

Treat the result as an estimate in cases such as:

• You are not sure whether the document is subject to stamp duty.
• You do not know the correct rate or fixed amount.
• The document includes an exemption or exception.
• The contract is issued in multiple copies.
• An upper limit may affect the result.
• The result will be used for official or accounting purposes.

Related calculators

You may also find these tools useful with the stamp duty calculator:

• VAT Calculator: for calculating VAT-inclusive and VAT-exclusive prices.
• VAT Withholding Calculator: for understanding VAT distribution in withholding transactions.
• Rental Withholding Calculator: for calculating withholding on rent payments.
• Corporate Tax Calculator: for estimating tax on company profits.