On The Wire

A merchant paying 2% on a €100 card sale is paying three parties. €1.20 of interchange to the customer's bank. €0.20 of assessment to Visa or Mastercard. €0.60 of margin to their own processor. The largest slice goes to a bank the merchant has no relationship with, at a rate the merchant had no part in setting. That last clause is why regulators keep intervening. Every major market that has, w...

Ask an e-commerce merchant what payments cost them and they quote the processing rate. 1.2%. The real number is roughly double that, and most of it never appears on the processor's invoice. A retailer doing €22 million a year pays €264,000 in card processing. They also lose €104,000 to fraud and prevention tooling, €65,000 to false declines where their own filters blocked real customers, €42,0...

Card checkout in 2026 is a good customer experience. One-click for returning buyers, wallets, guest flows, real-time fraud screening. The problem is not the front end. It is the economics behind it and the ways it fails. Total payment cost for e-commerce is 2-4% of revenue once you count everything: processing at 1.0-2.5%, fraud losses at 0.3-0.8%, false declines at 0.5-2.0% of revenue, expired ca...

A regional bank with 2 million account holders decides to offer A2A payments. The product team budgets a year. They are off by a factor of four. Integration runs 7 to 12 weeks. Evaluation and partnership takes 2-4 weeks. Technical integration takes 4-8 weeks. Go-live preparation takes 1-2 weeks. With a modern API stack and an experienced team, the floor is 5-6 weeks. The reason banks overestimate...

Every bank evaluating A2A asks the same three questions: what does integration actually involve, how long does it take, and who do we need. This episode answers all three with real timelines, real team composition, and real budget figures. First, the structure of the network, because it determines your scope. Payment institutions bring customers, the people who pay. payware onboards merchants dire...

A merchant runs €10 million through cards and pays €100,000 in fees. They ask their processor where the money went. The answer is one word: interchange. Interchange is the fee the merchant's bank pays the customer's bank on every card transaction. It has been justified the same four ways since the 1970s: fraud risk, infrastructure investment, credit risk, and customer rewards. Each one fai...

Interchange is the most scrutinised fee in payments and the least understood. This episode takes it apart: where the money actually goes, why the fee exists, why the original justifications no longer hold, and why it is now declining for structural reasons rather than political ones. Start with the flow. On a €100 card payment in regulated Europe, the merchant keeps €98.65-99.30. The acquirer take...

Merchant evaluations of A2A keep stalling on the same misconception: that adding it is a multi-month engineering project comparable to standing up a card acquiring relationship from scratch. It is not. This full episode walks through what A2A integration actually looks like, by merchant type, with realistic timelines and the cost math. Three integration paths. Path one, e-commerce plugin. WooComme...

An e-commerce retailer doing €5M a year pays €65K in card fees. They want to add A2A. They budget a six-month integration project. They are off by an order of magnitude. For most merchants, A2A integration is hours to weeks, not months. WooCommerce, Magento, PrestaShop, Shopify - install the plugin, configure, test, go live. Two hours. Custom checkouts on a properly staffed API integration: one to...

A bank board reviewing payments strategy gets one chart: card acquiring revenue flat or trending down for five years, with a forecast that gets worse. Interchange caps. Merchant churn to fintechs. The instinct is to defend the existing book. The math says build the new one. This full episode is the complete business case for a mid-sized European bank - 18,500 merchants, €7.77B annual processing vo...

Card acquiring is the safe line on a bank's payments P&L. Until you look at the slope. EU interchange caps took 30-45% out of margins since 2015. Fintech acquirers keep winning on price. Mid-sized European banks now lose 10-12% of merchants a year to lower-cost competitors, accelerating. Most banks treat A2A as a defensive hedge - something to offer so merchants don't leave. The math s...

A restaurant chain processing €12M annually pays €156K in card processing fees and accepts it as cost of doing business. This full episode breaks down where that €156K actually goes - line by line - and why the same €12M can move bank-to-bank for under €30K. The card payment stack and what each layer takes: Interchange (€0.20-0.30 on €100, regulated in Europe to 0.2-0.3% by IFR; uncapped 1.5-3% in...

The actual cost of moving €100 between two bank accounts in real time, via SEPA Instant: €0.02-0.05. The cost a merchant pays for a €100 card transaction: €0.80-2.50. The multiplier is 16-125x. Card processing doesn't cost 2% because the infrastructure is expensive. It costs 2% because the market structure allows it. Four to six intermediaries each take a cut: issuing bank (interchange), card...

Grocery retail is the textbook payment-optimisation case. Margins are 2-4% net. Card processing eats 20-35% of that margin. Volume is high, transactions are small, customers are habitual, and a 0.3% margin movement is what the industry calls a meaningful year. This full episode covers what changes when grocery chains add A2A at checkout. Three retailer profiles, three demographic mixes, three adop...

Grocery margins are 2-4% net. Card processing fees consume 20-35% of that margin. A 0.3% margin movement is considered a meaningful year for the category. A 1% reduction in payment costs is transformative. A 45-store Belgian-Dutch chain on €1.4B revenue and €180M card volume pays €1.98M a year in processing alone. Add fraud, chargebacks, terminals, and ops staff: €2.29M, 28% of net profit. This br...

Banks and payment institutions evaluating A2A infrastructure face the same question: open banking, direct integration standards, or both? Most get the trade-off wrong because they read "open banking" as modern and "direct integration" as legacy. Neither label is accurate. This full episode walks through the actual architectural difference and what it means for what merchants ca...

"Open banking is the modern, superior approach." "Direct integration means custom work for every bank." Both takes are wrong, and they shape billion-euro infrastructure decisions in payment institutions every quarter. This briefing draws the actual line. Open banking is regulatory minimum - PSD2-mandated APIs that every European bank must provide, designed for compliance, optim...

Fuel retail has the thinnest margins of any retail category. On a 50-litre fill-up at €82.50, the fuel gross margin is €1.50 and the card fee is €0.83 - payment processing eats 55% of gross margin. Across a 45-location chain doing €285M annually, card fees come to €2.57M, equivalent to 59% of net fuel profit. Every basis point of payment cost is a profit-line decision. This full episode walks thro...

On a 50-litre fill-up at €82.50, the fuel margin is €1.50 and the card fee is €0.83. Card processing eats 55% of fuel gross margin. There is no other retail category where payment costs come this close to the entire profit line. This briefing covers what changes when a 45-location fuel chain on €285M annual volume adds A2A at the pump: actual-amount authorisation replaces €100 pre-auth holds, the...

B2B payments still run on PDF invoices, "please pay via bank transfer", 30-60 day payment terms, and finance teams that spend a quarter of their time matching bank-statement amounts to invoice numbers. B2C moved to one-tap years ago. B2B did not. This full episode walks through what happens when a B2B vendor swaps the invoice-and-wait model for payment links and recurring A2A. Three cust...

PDF invoices, "please pay via bank transfer", 30-60 day payment terms, manual reconciliation. B2B payments are stuck in 1995 while B2C runs on one-tap UX. For a €25M-revenue B2B SaaS vendor, that gap costs €1.28M a year. €169K of working capital sits in unpaid invoices. €778K vanishes into involuntary churn from card failures. €35K disappears into manual reconciliation. This briefing wal...

Every card acquirer in Europe sells the same product. Four card brands at competitive rates - won and lost on 0.05% differences, churning 12-15% of the merchant book every year. Margins compress. The acquirer keeps chasing replacement merchants instead of retaining the ones it already has. This full episode walks through what changes when a bank adds seven A2A payment methods alongside the cards....

Card acquiring is a commodity sale. Visa, Mastercard, Amex, Discover - every bank in Europe sells the same four brands at rates that differ by 0.05%. The market churns 12-15% of merchants every year over those decimals. The antidote is method diversity. Seven A2A payment methods alongside cards: QR, NFC, BLE, payment links, SMS, barcode, audio recognition. Each one matches a context cards can'...

Most merchants think "2-3 days isn't that bad." They're missing the real cost. A €500K monthly revenue merchant with 2.5-day settlement has €42K constantly locked in transit. Add cost of capital and the true annual payment cost is €92,520 - not the €90K in card fees they see on the invoice. Instant settlement cuts that to €30K total. No locked capital. No settlement risk. This ep...

Most merchants think "2-3 days isn't that bad." They're missing the real cost. A €500K monthly revenue merchant with 2.5-day settlement has €42K constantly locked in transit. Add cost of capital and the true annual payment cost is €92,520 - not the €90K in card fees they see on the invoice. Instant settlement isn't just about speed. It's about cash flow, working capital,...