Key takeaways
- An FBO account is a single bank account held 'for the benefit of' a fintech's customers, with each customer's share recorded in the fintech's own ledger rather than at the bank.
- Because the bank sees one pooled balance, the fintech's ledger is the only record of who owns what. If the ledger and the bank disagree, customers can lose access to money.
- The 2024 collapse of Synapse, a banking-as-a-service middleware company, left a reported gap of tens of millions of dollars between ledger records and bank balances.
- Daily reconciliation of the FBO balance against the sum of customer ledger balances, by bank and by program, is the core control.
What an FBO account is
Many US fintech apps do not hold a banking licence. Instead, they partner with a bank. Customer money is held at that bank in one pooled account titled for the benefit of the fintech's customers, known as an FBO account. The bank holds the money. The fintech, or a middleware provider between the fintech and the bank, keeps the ledger that says how much of the pooled balance belongs to each customer.
This structure lets the fintech offer accounts, cards and transfers quickly. It also means the bank cannot see individual customer balances in its own systems. The ledger is the only record of ownership, and deposit insurance that passes through to individual customers depends on that record being accurate and available.
What Synapse showed
In 2024, Synapse, a company that sat between fintech apps and partner banks, entered bankruptcy. When the parties tried to work out who owned what, the ledger records did not agree with the money held at the banks. Reports during the proceedings put the gap in the tens of millions of dollars, and many end users were unable to access their funds for months.
The failure was not a single fraud or a single bad payment. It was the accumulation of unreconciled differences between several ledgers and several bank accounts over time. Each was small. Together they made it impossible to say with confidence what each customer was owed.
The reconciliation that prevents it
| Line | Bank A FBO (USD) | Bank B FBO (USD) |
|---|---|---|
| Balance per bank statement | 61,402,118.25 | 23,950,400.00 |
| Sum of customer balances in ledger | 61,388,618.25 | 23,962,900.00 |
| ACH credits received, not yet posted to customers | 13,500.00 | 0.00 |
| Card settlement debited, not yet posted | 0.00 | (12,500.00) |
| Unexplained difference | 0.00 | 0.00 |
In this example both banks reconcile once two explained items are recorded. Bank A holds $13,500.00 of incoming transfers that have not yet been credited to customers. Bank B has paid a card settlement that the ledger has not yet charged to customers. Both items must clear in the next day's reconciliation. If either rolls forward for several days, it becomes the kind of difference that compounds.
The regulatory direction
US bank regulators have increased scrutiny of bank-fintech partnerships since 2024, with several partner banks placed under enforcement orders requiring stronger oversight of third-party ledgers and reconciliation. On 17 September 2024 the FDIC also proposed a recordkeeping rule, Part 375, for custodial deposit accounts with transactional features. It would require banks holding these accounts to keep records identifying each beneficial owner and the balance attributable to each, and to ensure those balances are accurate and reconciled daily. Firms should check the rule's current status before relying on a specific requirement. The practical direction is clear either way: banks expect fintech partners to prove, daily, that the ledger and the bank agree. Our guide to the FDIC custodial account recordkeeping proposal explains what it would require of banks and their fintech partners.
How Safeheld supports FBO reconciliation
Safeheld reconciles each FBO account at each partner bank against the ledger's customer balances every day, classifies explained items, flags unexplained differences, and keeps the history examiners and partner banks ask for. See Safeheld reconciliation, banking-as-a-service reconciliation and three-way reconciliation.
Frequently asked questions
What is an FBO account?
A pooled bank account held for the benefit of a fintech's customers, where each customer's share is recorded in the fintech's ledger.
Why do FBO accounts need daily reconciliation?
Because the bank sees only one pooled balance, the ledger is the only record of who owns what. Daily reconciliation proves the two agree.
Should FBO accounts be reconciled in total or per bank?
Per bank and per account. A surplus at one bank does not cover a shortfall at another.
What went wrong at Synapse?
Ledger records and bank balances diverged over time, leaving a large gap and making it impossible to confirm each customer's balance quickly.
References
About Safeheld
Safeheld reconciles client money every day, resolves every difference and prepares every regulatory return for sign-off, for regulated firms in the United States, the United Kingdom, the European Union, Canada, Australia, Singapore and Hong Kong. To discuss your operations, contact us at safeheld.com/contact.
This article is for general information and does not constitute legal or regulatory advice.