Flow of Funds (FoF)
A flow of funds is a map of every party a payment passes through and, at each step, who legally controls the money. Banks, regulators and counterparties use it to work out licensing exposure, banking requirements and where settlement risk actually sits.
Also called: funds flow · FOF diagram
A flow of funds follows one unit of money from the payer to the final recipient and names, at every step, the account it sits in and the party able to direct it. It is written as a sequence of legs rather than a picture of systems: who receives, into whose account, in what currency, under what authority, and where it goes next.
It is asked for because it answers questions nothing else does. Whether a business needs a money transmitter license usually turns on whether customer money ever comes under its control, and that is visible only in the funds flow. The same document tells a bank what will run through the account it is being asked to open, and shows exactly where a pay-in leg ends and a payout leg begins.
What a usable one contains
- Every party, including any that touch the money only briefly.
- The account at each step, and whose name is on it.
- Who can instruct a payment out of that account.
- The currency, and the point at which conversion happens.
- Timing: when each leg moves, and who is owed what in the gap.
In practice
A flow of funds is about legal control of the money at each step, not about the technical integration diagram. Two structures with identical API calls can carry completely different licensing consequences, because what matters is whose account the money lands in and who can move it out.
Example
A marketplace takes card payments in London, converts to pesos and pays sellers in Mexico. The integration diagram has five arrows. The flow of funds asks one question at each: whose name is the receiving account in, and who can instruct a payment out of it. If the answer at the London leg is the marketplace, it is holding seller money; if it is the acquirer paying sellers directly, it is not. Same arrows, different license.
Commonly confused with
| Term | How it differs |
|---|---|
| Integration or architecture diagram | An integration diagram shows where data and API calls go; a flow of funds shows where the money goes and who controls it, which is the question a regulator asks. |
| Ledger | A ledger is the running record of what actually happened to each balance; a flow of funds describes the route and control of money by design, before anything moves. |
See also
- Money Transmitter LicenseA money transmitter license is permission granted by a US state for a company to receive money from the public in that state and pay it, or its value, to someone else. Each state licenses separately.
- Pay-in and PayoutPay-in and payout are the two legs of a payment. The pay-in collects money from the sender, by card, bank transfer, wallet or cash. The payout delivers money to the final recipient, often through a local partner, bank network or cash agent.
- SettlementSettlement is the point at which value actually moves between parties and the obligation between them is discharged. It is a separate step from clearing, which only works out who owes what, and from finality, which is the moment the transfer can no longer be reversed.
- Merchant of RecordThe merchant of record is the legal seller in a transaction — the party named in the contract of sale and on the customer’s statement, and the one the chargeback and consumer obligations follow, whoever actually fulfills the order. It is a commercial description rather than a card-scheme term, and tax law does not always follow it.