Anyone who opens an online store in Turkey eventually asks: how do we issue invoices? The first half of this post summarizes the general rules as of 2026. The second half covers our side of it: how an order on your site becomes an invoice at your e-invoice provider.
To be clear up front: we’re a software team, not accountants. The information below is based on published communiqués, but always confirm with your accountant (mali müşavir) what applies to you. These rules change almost every year.
The rules in short
Thresholds for moving to e-invoice and e-archive. The general threshold is annual gross sales above 3 million TL. If you sell online, through your own site or marketplaces, the threshold is 500,000 TL. You have to switch by 1 July of the year after you crossed it, so if your 2025 sales crossed it, the deadline is 1 July 2026.
The end of paper invoices. Under Tax Procedure Law General Communiqué No. 589, businesses on the balance-sheet basis have issued e-archive invoices to buyers who aren’t e-invoice users, regardless of amount, since 1 January 2026. Businesses on the simplified or operating-account basis can still issue paper invoices up to 3,000 TL including taxes until 31 December 2026. From 1 January 2027, all invoices will be electronic whatever the amount.
Online sales. A seller within the e-archive system has to issue invoices for online sales as e-archive invoices. In practice: if you sell online, forget paper invoices.
Whether these deadlines get postponed again is debated at the end of each year. It’s worth watching the Official Gazette or your accountant’s announcements in November and December.
Choosing a provider
For e-archive and e-invoice you work with a company on the Revenue Administration’s (GİB) list of private integrators. Pricing is mostly per invoice credit. From our side, what matters is:
- Does the provider have a documented, up-to-date API?
- Does it offer a ready connection for your e-commerce platform or accounting software?
- Is there a test environment? You don’t want to issue and cancel test invoices in production.
- Can you access the invoice PDF and link programmatically? You need this to send invoice links to marketplaces.
- How does it tell you when an invoice fails?
If you use accounting or ERP software such as Paraşüt, Logo or Mikro, that software often issues the invoice. In that case your store talks to the accounting software, not the provider.
From order to invoice: where it goes wrong
On paper the flow is simple: the order comes in, payment is confirmed, the invoice is issued and emailed to the customer. Most problems are in the details.
ID number. An e-archive invoice to an individual has a Turkish ID number field. Making it mandatory at checkout can hurt conversion. When the customer’s number isn’t collected, a common practice is to enter 11111111111. Confirm with your accountant when that’s appropriate.
Business customers. When a customer wants a company invoice, the checkout form has to collect the tax number and tax office correctly. If the buyer is an e-invoice user, the invoice has to go out as an e-invoice, not e-archive. A good integration tells the difference from the tax number.
Discounts, shipping and VAT. When coupon discounts, free shipping and products with different VAT rates are in the same cart, line totals have to match the order to the cent. Rounding differences are one of the most common errors we see.
Returns and cancellations. Cancelling or returning an order that has already been invoiced needs its own process. Plan how it works, who approves it and where the system records it from the start.
Marketplace orders. For orders from marketplaces like Trendyol and Hepsiburada, after issuing the invoice you have to send its link or file to the marketplace. Doing this by hand stops scaling as order volume grows. We cover the Trendyol side in our Trendyol API guide.
When to automate
With a handful of orders a day, issuing invoices by hand from the provider’s panel can work. As volume grows or you start selling on several channels, manual invoicing takes time and invoices get forgotten. We usually suggest this order: first automatic invoicing for paid orders, then the return and cancellation flow, and finally connecting marketplace orders to the same setup.
To see what’s ready-made for your platform and provider and what needs building, check our e-invoice, accounting and ERP integration page or contact us.