Stamp duty (Turkey): the hidden cost in contracts

You signed a supply agreement, shook hands, and got to work. A few weeks later your accountant calls: that contract carries a stamp duty in Turkey, and nobody put it in the budget. It is one of the most common surprises in small business, for a simple reason — stamp duty is charged not on your sales, profit, or turnover, but on the piece of paper you signed.

This guide explains what stamp duty is, which documents trigger it, who pays, how it is declared, and where small and medium businesses most often slip up. The aim is to make the concept clear. We deliberately avoid quoting current rates, amounts, and ceilings, because they change every year — for the exact figure, talk to a mali müşavir (a licensed accountant).

What stamp duty actually is

Stamp duty is a tax on a document, not on a transaction. Unlike VAT, which rides on top of a sale, it arises the moment you draw up and sign a particular paper. In legal terms, "papers" is a broad category: contracts, undertakings, receipts, payrolls, lease agreements, letters of guarantee, and more.

The tax rests on the Stamp Duty Law (No. 488), which dates back to 1964. Tables attached to the law list, item by item, which papers are taxable and which are exempt. If a document falls within that scope and, once signed, can serve as proof or take legal effect, the duty is considered to have arisen.

Here is the critical point: the trigger is not money changing hands — it is the signature. You can sign a contract and owe stamp duty even if not a single lira has been paid yet. That is exactly where the line "but we haven't been paid yet" misleads so many owners.

Which papers are subject to stamp duty?

What surprises owners most is that documents they think of as "ordinary" fall within scope. The following papers routinely trigger stamp duty in day-to-day business:

Papers subjectto dutyContractsLease agreementPayrollLetter of guarant…

• Commercial contracts: Supply, service, dealership, or framework agreements; if a specific amount is written into them, they are usually subject to proportional duty.
• Lease agreements: A workplace lease is often taxed on the total rent payable over the whole term, not a single month — and this is easy to overlook.
• Payrolls: Wages paid to employees are also subject to stamp duty, and it recurs every month.
• Letters of guarantee and surety: Guarantees taken from a bank, or given when entering a job, can fall within scope too.
• Receipts and undertakings: Papers that commit you to perform a job, or that show a sum has been received, may also make the list.

Do not overlook the cheques and promissory notes you use for deferred payments; recording them properly is a discipline in itself, and setting up tracking for cheques and promissory notes from the start makes life easier. Likewise, the self-employment receipt a freelancer issues is, in the end, another "paper" with its own rules.

Proportional or fixed? How the rate works

Stamp duty is calculated in two different ways, and it matters not to mix them up.

Proportional duty

If a specific monetary amount is written into the paper — say, "the value of this contract is 500,000 lira" — the duty is calculated proportionally, as a fraction per thousand of that amount. The applicable rate is fixed in the tariff attached to the law and is usually revalued each year. There is also an upper limit, a ceiling: on very high-value contracts, the duty does not climb past that cap.

Fixed duty

Some papers instead carry a fixed lira amount, whatever value sits inside them. That fixed figure is also updated annually. In other words, the type of document decides, from the outset, whether the duty is proportional or fixed.

We deliberately do not print specific numbers here, and we should not: rates, fixed amounts, and the ceiling change from year to year. Working from an old figure can lead to underpayment, and that means penalties and late-payment interest. For the current rate, always turn to your accountant or the tariff in force.

In stamp duty, the danger usually hides not in the big contract, but in the small paper you forgot.

Who pays? Joint and several liability

As a rule, the parties who sign the paper are liable for the duty. But here is the detail that bites: the parties carry joint and several liability. If two companies sign a contract together, the tax office can demand the entire duty from either of them. A private "half from you, half from me" split is not binding on the state.

If one party is a government office or an exempt institution, the other party usually pays. That is why "the other side will handle it" is a dangerous assumption; if the payment is not made, the responsibility can land squarely on you. Writing into the contract who pays guides you between yourselves, but it does not remove the state's right to collect from you.

To see how taxes connect, think of stamp duty not on its own but as one piece of a whole. Our guides to income tax and advance tax and to how VAT is calculated round out two important parts of that picture.

How stamp duty is declared and paid

1Paper is signed2Is it taxable?3Base and rate4Declare and pay

Stamp duty is generally reported through a return. Businesses with continuous stamp-duty liability declare it regularly, month by month. In occasional, one-off cases, the duty must be declared and paid within a short window after the document is drawn up. Which method fits you depends on the structure of your business and how often you produce such papers.

Details such as documents issued electronically, how many copies of a paper were prepared, and how the signature was applied have affected the duty in the past, and the rules have shifted from time to time. So rather than saying "it was like this last year," it is safest to confirm the current treatment. A small detail can change what you owe.

The mistakes SMBs make most with stamp duty

The traps a business falls into before its paperwork settles:

• Forgetting the lease: The stamp duty on a workplace lease is often missed, even though it can be calculated over the entire rental term.
• Not counting the payroll: That the payroll is taxable is easy to forget; it is a recurring monthly item.
• Trusting the other side: Acting on the assumption that "they will pay" can leave you paying, thanks to joint and several liability.
• Assuming it is free: No amount written in the contract does not always mean no duty; depending on the document type, duty can still apply.
• Calculating with an old rate: Using last year's rate or ceiling brings the risk of underpayment and penalties.

Exemptions and reliefs: not every paper is taxable

The good news: not every document triggers stamp duty. The tables attached to the law list many exemptions, and there are reliefs for certain incentives, R&D, exports, or some public transactions. Even for a small tradesperson, an unexpected exemption can sometimes step in and cancel the duty.

But the exemption list is long and technical; it is not something to run from memory. Rather than assuming "there is probably an exemption for this," the safest move is to ask your accountant before you sign. Digitizing your contract flow helps too: once you organize e-signature contract workflows, it becomes clear which document was signed and when, and no paper gets lost in the records.

What to ask your accountant

You do not have to manage stamp duty end to end yourself; often, asking the right questions is enough. Before you sign an important document, get these clear:

• Is this document taxable? Find out up front whether the paper in your hand falls within scope.
• Proportional or fixed? Ask whether the duty is calculated as a proportion or as a fixed amount; this drives the figure directly.
• What is the current rate or amount? Confirm the rate in force and any ceiling; never proceed on an old number.
• Who declares it, and when? Discuss who carries the duty to declare and pay, and the deadline that applies.

Frequently asked questions

Stamp duty is not a line item that will sink a business on its own; but when it is forgotten, it stings — penalty and interest included. The healthiest habit is to make a reflex of asking "does this carry stamp duty?" before signing any important document, and to keep your papers in one place. A tool like Rocketly, which holds quotes, contracts, and light bookkeeping on one screen, keeps it visible which document you signed and when — so neither a paper nor the tax attached to it slips past you.