Photo by Pavel Danilyuk on Pexels. A phone held over a payment terminal.
Ten payments of £10 make £100 of payment volume. If a fictional processor earns 20p on each payment, its revenue is £2. The other £98 has not disappeared from its sales: it was never the processor’s revenue in this example.
That difference matters when a payments headline puts a trillion-dollar number beside a company name. Payment volume describes activity passing through a system. Revenue describes what the business earns under its arrangements. Profit requires another step, after costs.
Visa, Mastercard and PayPal illustrate why even an apparently tidy comparison needs care. Their disclosures use different measures of activity. Dividing revenue by volume can produce a useful starting point within a consistent series, but it does not automatically reveal a merchant’s fee or identify the most profitable business.
Fact: the volume labels cover different things
Visa (NYSE: V) defines payments volume as purchases made using specified Visa-branded cards and other payment forms, excluding Europe co-badged volume. Its 2025 annual filing distinguishes that dollar measure from the number of transactions it processes. One counts value; the other counts events.
Mastercard (NYSE: MA) uses gross dollar volume, or GDV, which includes purchases and cash volume. Its 2025 annual filing separately reports switched transactions: transactions initiated and switched through its network. Mastercard’s GDV and Visa’s purchases measure therefore have different boundaries.
PayPal (NASDAQ: PYPL) defines total payment volume, or TPV, as successfully completed payments on its platform or enabled through a partner solution, net of reversals and excluding gateway-exclusive transactions. Its 2025 annual filing reports $1.79 trillion of TPV and $33.172 billion of net revenue for the year ended 31 December 2025.
These are historical examples checked on 15 October 2026, rather than a report of today’s trading. The labels identify what to compare before asking how quickly any company is growing.
A percentage needs a name
In the fictional opening example, £2 divided by £100 is 2%. Calling that revenue divided by payment volume is accurate. Calling it a 2% profit margin is not: the calculation contains no costs. A profit margin would compare an appropriately defined profit with revenue.
The same arithmetic gives PayPal roughly 1.85% when its reported 2025 net revenue is divided by its rounded TPV. That is a calculated blended ratio, not a quoted customer price. PayPal’s revenue includes other value-added services as well as transaction revenue. Its transaction expenses also include funding-source costs.
Interpretation: a ratio becomes more informative when its label says exactly what entered the numerator and denominator. It becomes less informative when a convenient short label invites the reader to substitute a different question, such as how much a particular shop pays.
Imagine two fictional processors, both handling £100. One earns £2 and incurs £1 of operating costs. The other earns £3 and incurs £2.50. The second has the larger revenue-to-volume ratio, while the first has the larger operating profit in this deliberately stripped-down example. The inputs are invented; they show why revenue yield cannot settle profitability.
More pounds and more payments are different growth stories
Keep the starting point in view. Ten £10 payments and twenty £5 payments both total £100. If a hypothetical contract charges a fixed amount per transaction, the two sets produce different revenue despite identical volume. If it charges only a fixed percentage of value, they produce the same revenue before other terms.
Real arrangements need their own disclosures. Mastercard describes network fees linked to volume and switching services. Visa says service revenue is primarily assessed using the previous quarter’s nominal payments volume, while data-processing revenue is principally driven by processed transactions. Even the reporting clock can differ within one business.
Interpretation: comparing this quarter’s total revenue with this quarter’s activity can obscure timing and business mix. A useful follow-up asks whether the movement came from more transactions, larger average payments, different products, pricing or the reporting currency. An aggregate percentage cannot isolate all those effects.
Nor does a bigger average payment prove a stronger customer franchise. In the ten-versus-twenty example, the larger average belongs to the system processing fewer payments. Both the count and the value are needed before attaching a business explanation.
Who could benefit?
Conditional interpretation: Visa and Mastercard could earn additional network revenue if more relevant activity reaches their systems and applicable pricing holds. The mechanism follows their disclosed fee drivers. Over coming reporting periods, however, the benefit depends on the type of activity and customer terms; a pound of additional volume does not establish a fixed amount of incremental profit.
PayPal could benefit if additional completed payments generate revenue exceeding their associated processing, funding and other costs. Its business connection is direct, but the £100 example shows why scale alone is insufficient. The next evidence would be comparable revenue and expense disclosures, with management’s explanation of changes in the mix.
These are material operating questions for payments businesses. This article does not estimate the earnings contribution of an extra unit of volume for any issuer, rank the shares or predict their prices.
Who’s at risk?
Visa’s filing identifies competitive pricing and client incentives as pressures on net revenue and profitability. Mastercard records customer rebates and incentives alongside its network economics. Conditional interpretation: retaining or winning activity on more generous terms can leave less revenue from a given amount of business. More volume and more bargaining pressure can occur together.
PayPal’s funding-source costs provide another route. If the cost of completing additional payments rises faster than the associated revenue, extra activity could contribute less to earnings. That is a conditional mechanism, not a forecast that its costs will rise.
The common analytical risk is to treat all three volume measures as interchangeable and the resulting ratios as a league table. Their boundaries, services and commercial arrangements differ. A meaningful comparison would reconcile those differences and the reporting periods before drawing conclusions.
What would change the assessment?
Speculation: a company could win more activity while earning less per unit, or accept a lower revenue yield while improving profit through lower costs. Neither outcome follows from volume growth alone. Evidence would come from later filings that explain the revenue, incentives, expenses and activity together.
The limitation is that annual aggregate disclosures cannot reconstruct every customer’s contract or every transaction’s economics. They can still prevent a large category error. Read the activity definition first, then the revenue bridge, then the costs. A trillion dollars passing through a platform tells a different story from a trillion dollars earned by it.
This article explains financial measures and conditional business exposures. It provides no personalised investment recommendation.