Types of Payment Cards and Their Services

A credit card lets the cardholder borrow money from the issuing bank up to an agreed credit limit, and the cardholder repays the balance later, either in full or in monthly instalments with interest. The issuing bank carries the credit risk, because it pays the merchant even if the cardholder later fails to repay. A debit card works differently, because it draws money directly from the cardholder current account at the moment of the transaction, so the cardholder can only spend what is in the account plus any agreed overdraft. A prepaid card is loaded with funds before use, and spending stops when the loaded balance runs out, which makes it useful for travel, gifts and controlled expenses. A charge card must be repaid in full each month, and a commercial card is issued to a business for employee spending, travel and procurement. Each card type exists because a different user need sits behind it, and a business analyst who confuses them will design the wrong flow. Credit cards exist to give consumers short term borrowing and a buffer between purchase and payment, which is why they carry interest, minimum payments and credit checks. Debit cards exist to give consumers direct access to their own money, which is why they need no credit check and carry no interest. Prepaid cards exist to limit exposure, so a parent can load EUR 200 for a teenager, or a company can load EUR 500 for a conference trip, without risking the main account. Charge cards exist for customers who want payment convenience without revolving credit, and commercial cards exist so a company can control, track and reconcile employee spending in one place. Card services add value on top of the basic payment, and they change what the payments team must build and support. Instalment plans let a cardholder split a EUR 120 purchase into three monthly payments of EUR 40, which needs a loan record, a repayment schedule and interest rules in the issuer system. Cashback returns a small percentage of spending to the cardholder, and loyalty points convert spending into rewards, so both need accrual, redemption and expiry logic. Commercial cards add controls such as spending limits per employee, merchant category blocks and approval workflows, so a finance team can stop a hotel booking above EUR 300 without stopping a taxi fare. Contactless payments, tokenised card numbers for mobile wallets and virtual cards for online shopping are also services, and each one changes the data exchanged and the fraud controls that apply. For a business analyst, the card type decides the questions to ask in a requirements workshop, and getting it wrong creates rework later. A credit card flow needs credit limit checks, interest calculation, minimum payment rules and a statement cycle, while a debit card flow needs real time balance checks against the current account and overdraft rules. A prepaid card flow needs a load process, a balance ledger and a rule for what happens to unused funds, while a commercial card flow needs hierarchy, approval limits and expense reporting. A product owner should also consider who pays for the service, because instalments and cashback cost the issuer money, and those costs are recovered through interchange, interest or annual fees. Testing must cover each card type separately, because a test that passes for debit can still fail for credit when the limit logic is missing.