Klarna's business model is a multi-sided platform that monetizes the connection between consumers seeking flexible payment options and merchants seeking higher conversion rates and larger average order values. Unlike traditional credit card companies that charge consumers high interest rates, Klarna's primary revenue engine is merchant fees — and this reversal of the traditional credit model is what gave Klarna its initial competitive edge. **Merchant Discount Rate (MDR)** The largest revenue stream for Klarna is the merchant discount rate — a percentage fee charged to retailers for each transaction processed through Klarna's payment products. MDR rates typically range from 1.5% to 5.99% depending on the product type, merchant volume, and geographic market. Merchants willingly pay this premium because Klarna demonstrably increases their conversion rates by 20–30% and boosts average order values by 41% on average, according to Klarna's own merchant data. For a retailer doing 10 million dollars per month in online sales, even a 2% Klarna fee is easily justified if it drives 25% more completed purchases. **Interest Income from Consumer Credit Products** While Klarna's headline "Pay in 4" product is interest-free, the company also offers longer-term financing options — 6, 12, 24, and 36-month installment plans — that do carry interest charges ranging from 7.99% to 29.99% APR depending on the consumer's credit profile and jurisdiction. These longer-term products generate meaningful net interest income and represent a growing share of Klarna's total revenue as it pushes into higher-value purchase categories like electronics, furniture, and travel. **Late Fees** Consumers who miss payments on Pay in 4 are charged late fees, capped at 7 dollars per missed installment in the United States. While Klarna does not rely heavily on late fees as a revenue driver — and actively disincentivizes late payments through reminders and grace periods — they do contribute to the revenue mix. The company's approach here is notably more consumer-friendly than traditional credit card issuers, which is a deliberate positioning choice. **Klarna Card** Launched in the United States and several European markets, the Klarna Card is a Visa-network debit and credit card that allows consumers to use Klarna's BNPL functionality at any merchant, online or offline, without requiring a specific Klarna integration. The card charges a monthly subscription fee of 3.99 dollars per month and earns interchange revenue on each swipe. The card deepens consumer lock-in, extends Klarna's addressable transaction volume, and generates both subscription and interchange revenue. **Klarna Plus (Subscription)** Klarna Plus is a premium subscription tier at 7.99 dollars per month that offers enhanced rewards, exclusive discounts from partner merchants, and premium customer service. It represents Klarna's entry into the subscription economy and signals a broader ambition to own the consumer relationship beyond individual transactions. **Klarna Ads and Commerce Media** The Klarna app has evolved into a genuine shopping destination with product search, price comparison, and curated editorial content. With 150 million consumers actively browsing and purchasing, Klarna has built a high-intent advertising platform — Klarna Ads — that gives merchants sponsored placement within the app at the point of purchase consideration. This business is still early-stage but growing rapidly and carries extremely high margins compared to payment processing. **Credit Risk as a Competitive Moat** Klarna's profitability depends critically on its ability to underwrite consumer credit risk accurately at scale. The company uses a proprietary AI-driven decisioning engine that evaluates hundreds of behavioral and transactional signals to make real-time credit decisions — often in under a second. As of 2024, Klarna's net credit loss rate had declined to approximately 0.6% of total transaction volume, a significant improvement from the 1%+ levels seen in 2021–2022 during the high-growth, looser-underwriting period. This improvement is central to its profitability story.