Bookkeeping software in Turkey: what Finn handles
Finn keeps your books in Turkish lira and converts foreign-currency items at the right rate, so a euro supplier bill or a dollar customer payment sits correctly next to everything else. Every transaction is categorised with the context of your company, and anything Finn is unsure about is flagged for you instead of guessed.
Bank data comes in through CSV or PDF statement import, and Finn also reads Wise, Revolut, Mercury and Stripe. Send a receipt photo to Finn on WhatsApp, forward an invoice by email, or drop a file into Telegram or Slack, and it is read, filed and matched to the right transaction.
- Categorises bank transactions with your company context
- Matches receipts and invoices to payments automatically
- Handles TRY and foreign-currency items
- Works from WhatsApp, email, Telegram, Slack or the web
26 OctThe Muhtasar lands on 26 Oct. Finn has the figures ready from the ledger two weeks before, with the source beside each box.
KDV return software: rates, filing and what stays with you
Turkey has three KDV rates: 20% standard, 10% on textiles, clothing, furniture, restaurant food and similar items, and 1% on basic foodstuffs. Exports are zero-rated. There is no turnover threshold for registration, and there is no quarterly option: every VAT-registered business files a return every month, with payment due on filing.
Finn tracks input and output KDV as you record transactions and prepares the figures for each monthly return, including the separate reverse-charge KDV on services bought from abroad. You file the return in the GIB portal yourself. Finn puts the due date on your calendar and shows you the numbers to enter.
- Input and output KDV tracked per transaction
- Reverse-charge KDV on foreign services flagged
- Zero-rated export sales kept separate
- Monthly due dates on your calendar
Kurumlar vergisi: company tax in Turkey
The standard corporate tax (kurumlar vergisi) rate is 25%, rising to 30% for banks, insurers, factoring and leasing companies, payment institutions and e-money institutions. From 2025 a minimum corporate tax of 10% of commercial profit also applies, with newly established companies exempt for their first three fiscal periods. Finn shows which regime your company sits in.
The annual return is due by 30 April after the calendar year ends, with tax payable in two equal instalments on 30 April and 31 July. During the year you also file quarterly advance tax (gecici vergi) on the 17th of the second month after each quarter. Finn estimates the year's liability from your live books, so neither the advance payments nor the annual bill come as a surprise.
SGK payroll and social security in Turkey
Employer social security contributions are 23.75% of gross salary from 2026: 12% pension insurance, 7.5% health insurance, 2.25% short-term insurance and 2% unemployment insurance, before any incentive. Employees pay 15% from gross pay, made up of 14% social insurance and 1% unemployment. Payroll also carries income tax withholding at progressive rates from 15% to 40% and a stamp duty on gross pay.
Employers send a monthly combined withholding and SGK declaration, with SGK premiums due by the end of the following month. Finn records payroll costs, separates the employer and employee contributions in your books and reminds you of each monthly date. Payslips and the declarations themselves still come from your payroll process and the official SGK and GIB systems.
MERSIS and the Turkish trade registry: company formation and records
Companies are registered through MERSIS (Merkezi Sicil Kayit Sistemi), the central registration system, and the local trade registry. The Limited Sirket (Ltd Sti) needs minimum capital of 50,000 TL, while the Anonim Sirket (A.S.) needs 250,000 TL with 25% paid upfront. Foreigners can own 100% of either, with no local partner required.
Turkish law asks you to keep tax records for 5 years and commercial books for 10, so most businesses keep everything for 10. Finn stores every receipt and invoice against the transaction it supports, which keeps an audit trail you can export whenever your accountant, the tax office or an investor asks for it.
Sole traders and sahis sirketi in Turkey
A sole proprietorship (sahis sirketi) has no minimum capital and carries unlimited personal liability. Its profit is taxed as personal income, not corporate tax, at progressive rates of 15%, 20%, 27%, 35% and 40%, with the bands adjusted each year for inflation. The annual income tax return is due by 31 March, payable in two equal instalments on 31 March and 31 July.
Finn keeps the business and personal sides of a sole trader's money apart, flags what looks private, tracks income and deductible costs through the year, and shows your running taxable profit. That way the March return is a review of figures you have already seen, and the two instalments are planned well ahead.
Switching from Logo, Mikro or Parasut to Finn
Turkish businesses commonly use Logo, Mikro or Parasut, often alongside an accountant who keeps the official ledgers. Moving to Finn does not mean closing those accounts on day one. Export your transactions, contacts and chart of accounts as CSV from your current tool and import them into AccountsOS, and Finn maps the columns using AI instead of a fixed template.
There is no lock-in: your data stays exportable as CSV at any time. On e-invoicing, AccountsOS issues official e-Arsiv invoices directly with GIB: connect your e-Arsiv Portal credentials once, create the invoice as normal, send it to GIB and approve with the SMS code. Finn records it in your books with the KDV worked out. Sellers registered for e-Fatura (rather than e-Arsiv) still issue through their integrator for now.