Tax, Social Security and Bağ-Kur Payment Guide 2026

If you own a business in Turkey or work on behalf of yourself, you are facing a complex financial calendar. As of 2026, the digitized tax, SSI, and Bağ-Kur systems have become more transparent than ever, leaving you in complete control of managing this complex calendar. In this guide, we have compiled answers to questions like “Do I have any debt?”, “Where should I make payments?”, and “What discounts can I benefit from?” in light of the current 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 reduce error margins to zero.

📌 2026 Tax Payment Guide in 60 Seconds

• Where to Pay? The Digital Tax Office (GİB) for taxes and the SGK Card Payment System for SSI/Bağ-Kur are the safest havens. e-Government and mobile banking are at your service 24/7.

• Critical Dates: Tax returns are generally due by the 26th of the month, while SSI and Bağ-Kur payments are due by the last day of the month.

• Discount Opportunity: If you have no debt and make regular payments, the right to a 5% point discount remains in your pocket.

• Good News for Young People: If you are between 18-29 years old, you benefit from a tax exemption for 3 years.

• Credit Card Advantage: You can take advantage of your bank's free installment campaigns by making your tax and premium payments with a credit card.

  
  

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

If you own a business in Turkey, work independently, or are in an employer position, the two biggest stops on your financial calendar are Taxes and Social Security Premiums. Managing these obligations correctly is not only a legal requirement but also the key to protecting the financial health of your business.

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

The tax system is based on the declaration principle. The types you will encounter most often in the tax system are as follows:

1. Value Added Tax (VAT): It is a tax arising from your sale of goods or services. It is typically declared and paid by the 28th of each month.

2. Withholding and Service Statement: It covers lease payments, freelance receipts, and withholding taxes for your employees.

3. Provisional Tax: It is the "advance tax" that your company pays on profits earned in quarterly periods. It accrues 4 times a year (February, May, August, November).

4. Income/Corporate Tax: It is the tax paid on net income earned throughout the year. Sole proprietorships declare in March, capital companies (Limited/Anonymous) in April.

(*) What is the Declaration Principle? It means that taxpayers report their incomes to the state themselves. The state calculates the amount based on this declaration; therefore, correct and timely declaration is critical.

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

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

• Scope and Obligation of Bağ-Kur (4B)

If you start a sole proprietorship or become a partner in a Limited company, you automatically fall under the scope of 4B (Bağ-Kur).

Note: If you are not working elsewhere as 4A (insured), your Bağ-Kur premiums start from the day you set up the company. These premiums entitle you to benefits such as retirement, health services, and disability benefits.

• Employers' Responsibility: SSI Premiums

If you employ staff, you must not only follow up on your employees' salaries but also the SSI Employer and Employee Shares that must be paid to the state. These payments are generally due by the end of the following month. Delayed payments may result in losing incentives provided by the state (e.g., 5% discount).

Tax Debt Inquiry and Payment Methods

As of 2026, you can handle all your financial obligations within a few minutes from your smartphone:

1. Digital Tax Office (GİB): 

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

• You can make payments for income tax, VAT, MTV, traffic fines, title deed fees, and more via digital.gib.gov.tr with credit cards or debit cards of contracted banks 7/24. 

2. e-Government: 

• Allows you to query and pay off tax and SSI debts in a single screen.

• By searching for the "Tax Debt Inquiry and Payment (GİB)" service, you can list your current debts and view your "4B Bank and Credit Card Payment" tab to see both your current premiums and any backdated debts, if any.

3. Payment with SSI Card: 

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

• Debts sometimes appear delayed in banks' mobile apps; here they are updated instantly. You can make payments by logging in with your Turkish ID number and selecting "Current Term" or "Previous Term".

4. Mobile Banking: 

• Mobile banking is the fastest payment method.

• By entering your bank's mobile application, you can make tax and SSI payments from the payments section.

• Automatic Payment: 

• Although manual processing is required for tax payments each month, you can give your bank an automatic payment order for Bağ-Kur and SSI premiums. This prevents potential forgetfulness, avoids last-minute rush, and you do not pay any delay interest.

💡 Expert Tip

When making tax and SSI payments with a credit card, follow your bank’s "Free Installments for Tax Payments" campaigns. These campaigns can ease your cash flow, especially during high-cost Income Tax or Corporate Tax periods.

Incentives, Discounts, and Penalties

In tax and insurance premiums, the government offers significant advantages to taxpayers who make regular payments and meet certain conditions. Here are the critical details that determine the money you’ll save:

1. "Regular Payment" Discount of 5 Points

• Bağ-Kur (4B) Discount: If you pay your premiums by the end of each month, you get a discount of approximately 5% on the premium amount for the following month.

• SSI Employer Discount: If you have no debt on the insurance premiums you pay for your employees, the government grants a 5-point discount on the employer's share. This provides a significant cost advantage per employee.

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

If you are opening a company for the first time and are between 18-29 years old, you can benefit from this incentive:

• Bağ-Kur Support: Your Bağ-Kur premiums are covered by the state for 1 year. According to the 2026 legislation, amendments have been made in this item. For support scope and details:  Young Entrepreneur Support Guide

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

3. Delay Fees and Interests

If you are even a day late in your payment, the system automatically applies the following:

• Delay Fee: Interest is added to the principal of the debt on a monthly basis at determined rates.

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

• Inability to Benefit from Health Services: If your Bağ-Kur debt exceeds 60 days, your access to state hospitals and drug assistance may be restricted.

4. Tax Compliance Discount

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

Fiscal Calendar and Critical Dates

Here is a standard fiscal calendar as of 2026:

1. "Critical" Days of Every Month

2. Payments Made Quarterly (Provisional Tax)

These are the periods during which you prepay the tax of your profits earned within the year.

• May 17: 1st Term (January-February-March)

• August 17: 2nd Term (April-May-June)

• November 17: 3rd Term (July-August-September)

• February 17 (Next Year): 4th Term (October-November-December)

3. Annual Declaration and Payment Periods

• March: It is the annual declaration and 1st installment payment period for sole proprietorships and income taxpayers.

• April: It is the declaration and payment period for Limited and Anonymous companies (Corporate Tax).

• July: It is the 2nd installment payment period for income tax.

📅 Other Payments

In addition to taxes and insurance, if you own a vehicle or property, here are the dates to add to your calendar:

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

• Property Tax: 1st installment is paid to the relevant municipality in May, 2nd installment in November.

Note: If the last payment day falls on a weekend or public holiday, the payment period automatically extends to the next business day.

❓ Frequently Asked Questions

1. Why wasn't my debt cleared even though I made a payment?

Due to integration between bank and institution systems, updating may take up to 2 business days. Keep your receipt; if the duration is exceeded, you can expedite the process by submitting a "Record Correction for Faulty Record" petition through the Digital Tax Office (GİB).

2. Can I pay only a portion of my debt?

Yes. Through GİB, you can choose any tax item you wish, and on the SSI/Bağ-Kur side, you can deposit a determined amount as partial payment. However, remember that the remaining amount will accrue delay interest and impact your incentive rights.

3. Is there a commission on credit card payments?

Public banks generally do not charge commission on tax payments, while private banks may reflect transaction fees according to their policies. On SSI’s card payment portal, very low transaction fees may occur depending on the bank.

4. If I make a payment to the wrong number (TCKN/VKN), will my money be lost?

No. By submitting a "Erroneous Payment Refund" petition with your payment receipt, you can have the amount credited towards your real debt or refunded to your account at the relevant institution (Tax Office or SSI).

5. Can I receive healthcare services while having Bağ-Kur debt?

If your premium debt exceeds 60 days, access to healthcare services may be restricted. However, with temporary regulations continuing in 2026, this right can be preserved. Be sure to verify your current status on the "Entitlement Inquiry" screen on e-Government.

Digitize Tax and Declaration Tracking with Üstad

With all financial documents managed from a single center and leaving complex financial processes behind, managing your financial processes end-to-end digitally is now very easy with Üstad. 

Üstad tracks your withholding, VAT, and all other tax periods on your behalf. When your financial advisor uploads the declarations to the panel, you can see the amounts to be paid and the due dates transparently and plan your financial planning without errors. Meet Üstad and start harnessing the power of digital and speed in your financial management!

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Hemen Başla

Hemen Başla

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