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Illustration showing how a credit card's available limit is calculated from the card limit, current spending, and installments

Credit Card

What Is Available Limit?

Available limit is what remains of a credit card's limit after subtracting current spending and outstanding installments. See how it's calculated, with worked examples.

Illustration representing bank credit card limit management

Credit Card

How is limit management done in banks?

In transactions carried out through banks, a certain limit is set due to the rules and requirements of institutions such as the BRSA (BDDK) and MASAK, as well as the measures banks take to reduce risk, and transactions above this limit are not approved. In the world of payment systems…

Illustration of a credit card installment payment plan

Credit Card

What is an installment?

An installment is when a credit card transaction is split into a fixed number of monthly payments to the bank. For example, splitting a 100 TL purchase into 5 installments means paying the bank 20 TL per month until the full amount is paid off.

Limit Control System (LKS) diagram

Credit Card

What is LKS (Limit Control System)?

Limit Control System (LKS): A system provided by KKB (Credit Bureau of Turkey) that allows customers' limit details to be checked in real time. It provides member banks (or institutions) with information sharing on consumers' credit card limits. Under the regulation by the BRSA...

Diagram showing the pre-authorization closing process flow on a POS terminal

Merchant & POS

What Is Pre-Authorization Closing?

Pre-authorization closing turns a pre-authorized transaction into a financial one, posting it to the merchant and cardholder accounts. See how amounts and available limit are affected.

Illustration representing recurring subscription payments with a credit card

E-commerce

What is Recurring Payment?

Transactions paid at regular intervals can be defined in the system so that only the installment amount blocks the credit card limit; these are called recurring transactions, used for subscriptions or automatic bill payments.

Illustration explaining the authorization process for card payments at POS, virtual POS, and ATM terminals

Merchant & POS

What is Authorization?

The term 'provizyon' comes from French and means obtaining approval for a transaction. In payment systems, authorization confirms that the card, POS, bank account, and transaction limits are sufficient to complete a payment.

Diagram explaining how a pre-authorization transaction works on a credit card

Merchant & POS

What Is a Pre-Authorization Transaction?

An operation that allows a credit card's limit to be blocked for a period, due to the nature of the product or service sold. Preferred mainly by companies in travel, tourism, and car rental.

Credit card limit reduction illustration

Credit Card

Can My Credit Card Limit Be Reduced Without My Permission?

Yes. Your credit card limit can be reduced without your permission and approval. Banks may set a lower limit as a result of updates based on a person's economic and social situation, credit score and similar information.

Diagram showing the structure of the ISO 8583 F54 Additional Amounts field

ISO 8583

ISO 8583 Field Descriptions (F54)

F54 - ADDITIONAL AMOUNTS is the additional amount field used in transactions. It can take different values depending on the transaction, such as carrying account balance information for balance inquiries.