Tax, Social Security and Bağ-Kur Payment Guide 2026

🔔 Update (April 2026)

If you own a business in Turkey or are self-employed, you are facing a complex financial calendar. As of 2026, the digitized tax, SGK, and Bağ-Kur systems are more transparent than ever, leaving the management of this complex calendar entirely under your control. In this guide, we have compiled answers to questions such as "Do I have any debt?", "Where should I pay?", and "Which discounts can I benefit from?" in light of up-to-date legislation. Whether you are a new entrepreneur or an experienced employer, get ready to take your financial management to the next level with tips that protect your wallet and payment methods that eliminate any margin of error.

📌 60-Second Tax Payment Guide for 2026

• Where to Pay? The Digital Tax Office (GİB) for taxes and the SGK Card Payment system for SGK/Bağ-Kur are the safest options. e-Government (e-Devlet) and mobile banking are available 24/7.

• Critical Dates: Tax filings are generally due by the 26th of the month, while SGK and Bağ-Kur payments are due by the last day of the month. However, deadlines can be extended through official announcements (for instance, the March 2026 deadline was extended to April 7).

• Discount Opportunity: A 5-percentage-point discount is available to those who have no outstanding debts and make payments regularly.

• Good News for Youth: If you are between 18 and 29 years old, you can benefit from a tax exemption for 3 years.

• Credit Card Advantage: By paying your tax and premium obligations with a credit card, you can take advantage of free installment options offered by your bank.

  
  

What is the Tax and Social Security System? How Does It Work?

If you are a business owner, freelancer, or employer in Turkey, the two major milestones in your financial calendar are Taxes and Social Security Premiums. Managing these obligations correctly is not only a legal requirement but also the key to keeping your business financially healthy.

• Which Tax is Paid When? (Types of Taxes)

The tax system is based on self-declaration*. The types of taxes you will encounter most frequently in the tax system include:

1. Value Added Tax (VAT / KDV): This is the tax incurred on your sales of goods or services. It is typically filed and paid by the 28th of every month.

2. Withholding and Premium Service Declaration: Covers rent payments, self-employment receipts, and withholding taxes of your employees.

3. Advance Tax (Geçici Vergi): This is the "pre-tax" your company pays based on its quarterly profits. It is accrued 4 times a year (February, May, August, November).

4. Income/Corporate Tax: This is the tax paid on net earnings generated throughout the year. Sole proprietorships file in March, while corporate companies (Limited/Joint-Stock) file in April.

(*) What is Self-Declaration? It is the system where taxpayers report their own income to the state. The state calculates the tax based on this declaration; therefore, accurate and timely filing is critical.

• Social Security Statuses: 4A, 4B, and 4C

In the SGK system, who pays premiums under which status is determined by codes starting with the number "4":

• Bağ-Kur (4B) Scope and Compulsoriness

If you have opened a sole proprietorship or are a partner in a Limited company, you are automatically covered under 4B (Bağ-Kur).

Note: If you are not employed elsewhere as an active employee (4A), your Bağ-Kur premiums start accumulating from the day you establish your company. These premiums grant you benefits such as retirement, access to healthcare services, and temporary incapacity allowance.

• Employer Responsibility: SGK Premiums

If you employ staff, you must track not only their salaries but also the SGK Employer and Employee Shares that must be paid to the state. These payments are typically due by the end of the following month. Payments not made on time will cause you to lose access to state subsidies (such as the 5% discount).

Tax Debt Query and Payment Methods

As of 2026, you can take care of all your financial obligations from your smartphone in just a few minutes:

1. Digital Tax Office (GİB): 

• This platform, provided by the Revenue Administration, is the main hub for tax payments. 

• You can pay income tax, VAT, MTV (Motor Vehicle Tax), traffic fines, title deed fees, and more 24/7 with credit or debit cards of partner banks at dijital.gib.gov.tr.

2. e-Government (e-Devlet): 

• Allows you to query and pay tax and SGK debts on a single screen.

• By searching for the "Tax Debt Query and Payment (GİB)" service, you can list your active debts, and through the "4B Premium Payment with Bank and Credit Card" tab, you can view both your current premiums and any past-due debts.

3. SGK Card Payment: 

• This is the portal for instant up-to-date debt payment via uyg.sgk.gov.tr/KartIleOdeme. It is the most reliable way, especially for Bağ-Kur (4B) premiums and restructuring installments.

• Outstanding balances that sometimes appear delayed in bank mobile apps are updated in real-time here. You can log in with your TCKN and absolute your payment by selecting "Current Period" or "Past Period".

• Due to updates or technical maintenance on SGK systems, payment deadlines may change. Therefore, it is highly recommended to follow official announcements regularly.

4. Mobile Banking: 

• Mobile banking is the fastest payment method.

• By logging into your bank's mobile app, you can easily process your tax and SGK payments from the payments tab.

• Autopay: 

• While tax payments require manual processing each month, you can set up autopay instructions with your bank for Bağ-Kur and SGK premiums. This helps prevent missed deadlines, avoids last-minute rush, and saves you from late payment interest.

💡 Pro Tip

Incentives, Discounts, and Penalties

For tax and insurance premiums, the state offers significant advantages to taxpayers who pay regularly and meet specific criteria. Here are the crucial details that keep money in your pocket:

1. 5% "Regular Payment" Discount

• Bağ-Kur (4B) Discount: If you pay your premiums on time by the last day of each month, you receive a discount of approximately 5% on the following month's premium amount.

• SGK Employer Discount: In major insurance premiums you pay for your staff, if you have no outstanding debt, the state provides a 5-percentage-point discount on the employer's share. This translates to a serious cost benefit per employee.

2. Young Entrepreneur Support (1 Year of Free Bağ-Kur)

If you are establishing a company for the first time and are between the ages of 18 and 29, you can benefit from this incentive:

• Bağ-Kur Support: Your Bağ-Kur premiums are covered by the state for 1 year. This clause has been updated under the 2026 regulations. For support scope and details, see:  Young Entrepreneur Support Guide

• Tax Exemption: For 3 tax periods, a portion of your earnings (updated annually) is exempt from income tax. 

3. Late Payment Penalty and Interest

If you delay payment by even one day, the system automatically applies the following:

• Late Fee: Monthly-based interests are added to the principal debt.

• Loss of Incentive: You lose your eligibility for the 5% discount mentioned above for that month.

• Loss of Healthcare Access: If your outstanding Bağ-Kur debt exceeds 60 days, your access to state healthcare services and drug benefits may be restricted.

4. Tax Compliant Taxpayer Discount

There is a loyal customer reward not only for insurance premiums but also for taxes. Taxpayers who file their annual income or corporate tax returns on time and have paid their taxes regularly for the last 2 years pay 5% less (up to a certain limit) of the calculated tax.

Financial Calendar and Critical Dates

Here is the standard financial calendar as of 2026:

1. "Critical" Days of Every Month

📌 Note (Specifically for March 2026)

2. Quarterly Payments (Advance Tax)

These are the periods when you pay advance tax on profits gained throughout the year.

• May 17: Quarter 1 (January-February-March)

• August 17: Quarter 2 (April-May-June)

• November 17: Quarter 3 (July-August-September)

• February 17 (Following Year): Quarter 4 (October-November-December)

3. Annual Tax Declaration and Payment Periods

• March: Current year annual return filing and payment period of the 1st installment for sole proprietorships and income taxpayers.

• April: Declaration and payment period for Limited and Joint-Stock companies (Corporate Tax).

• July: Payment period of the 2nd installment of income tax.

📅 Other Payments

If you own a vehicle or property, here are the dates you should add to your calendar outside of tax and social security:

• Motor Vehicle Tax (MTV): 1st Installment in January, 2nd Installment in July.

• Property Tax: 1st Installment in May, 2nd Installment in November, payable to the respective municipality.

Note: If a filing or payment deadline falls on a weekend or public holiday, the deadline is automatically extended to the next business day.

❓ Frequently Asked Questions

1. Why is my debt still showing up after I made a payment?

It might take up to 2 business days for records to refresh due to integration delays between banking and government systems. Keep your receipt; if the layout takes longer, you can accelerate the process by filing an "Inaccurate Record Correction" petition through the Digital Tax Office (GİB).

2. Can I make a partial payment on my debt?

Yes. You can make a partial payment on GİB by selecting specific tax items, or you can pay an amount of your choice for SGK/Bağ-Kur. However, bear in mind that interest will continue to accrue on the remaining balance and your tax incentive rights might be affected.

3. Is there a processing fee for credit card payments?

Public banks generally do not charge commission for tax payments, while private banks may apply fee policies of their own. On the SGK card payment portal, low transaction fees may apply depending on the bank.

4. Will I lose my money if I pay using the wrong number (TCKN/VKN)?

No. You can submit an "Erroneous Payment Refund" petition along with your receipt to the respective institution (Tax Office or SGK) to have the amount matched to your actual debt or refunded to your bank account.

5. Can I access healthcare services if I have outstanding Bağ-Kur debt?

Healthcare access may be restricted for premium debts exceeding 60 days. However, temporary regulations continuing into 2026 may protect this eligibility. Be sure to check your current status via the "Healthcare Eligibility Check" on e-Government.

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