Payments is one of the most profitable and defensible businesses in financial services. Every time a card is swiped, a digital wallet is tapped, or an online checkout is completed, the payments infrastructure extracts a small fee — billions of times per day, globally, 24/7. The global payments market processes over $150 trillion in transaction volume annually, generating hundreds of billions in fees across the value chain.
The payments industry has two distinct tiers: the network rails (Visa, Mastercard) and the processors and wallets that sit on top of those rails (PayPal, Block, Stripe, Adyen). The economics at each layer are very different.
The Payments Value Chain
When a customer pays with a Visa card at a merchant, multiple parties extract fees from that single transaction:
- Issuing bank (the customer’s bank, e.g. Chase) — earns the interchange fee, typically 1.5–2.5% of the transaction
- Card network (Visa or Mastercard) — earns a small network assessment fee, roughly 0.1–0.15%
- Acquirer / processor (the merchant’s payment processor, e.g. Stripe, Square) — earns a merchant discount rate minus interchange, typically 0.2–0.5%
Visa and Mastercard do not earn interchange — that goes to the issuing bank. Their fee is tiny per transaction, but collected on every Visa/Mastercard transaction globally. This is why their gross margins exceed 80%: they provide the rails that others ride, bearing almost no credit or fraud risk themselves.
Revenue Models in Payments
| Company Type | Revenue Basis | Typical Gross Margin |
|---|---|---|
| Card network (Visa, Mastercard) | Network fees on payment volume | 80%+ |
| Payment processor (Stripe, Adyen) | Merchant discount rate | 40–55% |
| Digital wallet (PayPal, Block) | Take rate on processed volume | 40–55% |
| Buy Now Pay Later (Affirm) | Merchant fees + consumer interest | 45–60% |
| Crypto exchange (Coinbase) | Spread and trading fees | 50–70% |
| Neobank (SoFi, Nu Holdings) | NIM + interchange + subscription | 40–60% |
The Network Effect Moat
Visa and Mastercard have the most powerful network effect in business. Merchants accept Visa because cardholders carry Visa. Cardholders carry Visa because merchants accept it. Once this flywheel is spinning, it is nearly impossible to displace — as decades of failed competitors can attest.
The result: Visa and Mastercard combined process over 70% of global card payment volume, operate at gross margins above 80%, and have returned extraordinary capital to shareholders for decades.
Key Companies in Payments
Card Networks (the rails):
- Visa — world’s largest card network by volume
- Mastercard — second-largest card network; stronger international presence
Digital Payments and Processing:
- PayPal — online checkout, Venmo, and merchant payment services
- Block — Square merchant payments, Cash App consumer platform, Bitcoin
- Robinhood — retail investing and payment services
Buy Now Pay Later:
- Affirm — point-of-sale financing for large-ticket purchases
Neobanks and Fintech Payments:
- SoFi — consumer banking, lending, and investing
- Nu Holdings — Latin America’s largest digital bank (Brazil, Mexico, Colombia)
Crypto Payments:
- Coinbase — largest US cryptocurrency exchange
Key Metrics for Payments Companies
Total Payment Volume (TPV) / Payment Volume Growth
The aggregate dollar value of transactions processed. TPV growth is the primary revenue driver for all payments businesses. Visa and Mastercard report payment volume quarterly; PayPal and Block report TPV.
Take Rate
Revenue as a percentage of TPV. Visa’s take rate is approximately 0.1–0.12% — tiny per transaction, but applied to $15+ trillion annually. PayPal’s take rate is ~1.9%, applied to ~$1.5 trillion in TPV. A rising take rate signals pricing power or mix shift to higher-value services; a falling take rate signals competition.
Net Revenue Retention / Active Accounts
For digital wallet and neobank platforms, monthly and annual active user counts drive revenue. PayPal tracks Monthly Active Accounts; Block tracks Cash App active users. Higher engagement (transactions per active account) drives revenue even without adding new users.
Gross Margin
Card networks (Visa, Mastercard) at 80%+ gross margins are exceptional. Processors and digital wallets run 40–55% gross margins because they must pay interchange to issuing banks — a major cost item.
Operating Leverage
Payments infrastructure is highly scalable — adding $1 billion more in TPV requires almost no incremental cost at a card network. This drives expanding operating margins as volumes grow.
The Buy Now Pay Later Disruption
BNPL providers like Affirm allow consumers to split purchases into instalments at point of sale. Merchants pay a higher fee (2–8% of purchase value vs 2–3% for cards) in exchange for higher conversion rates and larger average order values.
BNPL grew explosively in 2020–2022 as e-commerce surged, then faced headwinds as interest rates rose — making the consumer lending embedded in BNPL more expensive to fund. Affirm’s business model is more durable than most BNPL peers because it does not rely on 0% deferred-interest products.
The Crypto Payments Wildcard
Cryptocurrency payment rails (Bitcoin, Stablecoins, Layer-2 networks) are a long-term threat to — and opportunity for — traditional payments companies. Transaction fees on public blockchains can be fractions of a cent, compared to 2–3% for card payments.
Visa and Mastercard have responded by integrating stablecoin settlement and crypto card programs rather than fighting the technology. Coinbase is positioned as critical infrastructure if crypto payments scale — or exposed if regulatory headwinds intensify.
Key Comparisons
- Visa vs Mastercard: Card Network Rivalry
- PayPal vs Block: Digital Payments Battle
- Coinbase vs Robinhood: Retail Investing Platforms
Related Glossary Terms
- Gross Margin — why card networks are exceptional businesses
- Operating Leverage — the scalability of payments infrastructure
- Revenue Recognition — how gross vs net reporting affects payments revenue
- Free Cash Flow — the dominant return metric for capital-light payment networks