Family office cash flow infrastructure: the personal CFO function

Cash flow infrastructure in a family office is the set of systems and routines that let one person, usually the chief financial officer or an executive acting as one, see every cash balance, every obligation and every expected inflow across the family's entities on a single screen. It is the personal CFO function, and it is what makes liquidity management possible rather than theoretical. The survey data suggests most offices are still building it: AlTi and Campden Wealth's 2025 report found 42% of offices relying on spreadsheets, and Citi's 2025 survey ranked consolidated reporting among the top technology priorities.

What the function covers

The personal CFO function has four parts. Consolidated reporting aggregates holdings and cash across custodians, banks, fund administrators and operating companies into one view, with look-through to the underlying exposures where possible. Treasury manages the cash itself: where it sits, in which currencies, at what yield and under which counterparty limits. Forecasting projects the inflows and outflows over the next one to three years, including capital calls, distributions, tax dates, family spending and debt service. Controls cover who can move money, how payments are approved and how fraud is prevented.

In a single family office these functions are often combined in two or three people with external support. Citi's 2025 Global Family Office Survey found that 63% of offices handled reporting in-house and 60% handled investment management in-house, while 60% also worked with external investment advisers.

Technology spend and the spreadsheet problem

The 2025 Family Office Operational Excellence Report from AlTi Tiedemann Global and Campden Wealth, based on 146 single family offices, found that most spend $100,000 to $500,000 a year on technology, that 42% still rely on spreadsheets, that 70% rank cybersecurity as their top operational risk and that 60% had experienced at least one cyberattack.

Deloitte's Family Office Insights series, drawing on 354 single family offices with an average of $2.0bn under management, reported in its 2024 technology edition that 34% considered themselves underinvested in operational technology, 38% moderately invested, and 43% were developing or rolling out a technology strategy that year. Adoption was uneven: 87% used cloud applications and 65% made moderate or extensive use of technology for security and risk control, but only 49% did so for investment operations and 12% used AI-driven solutions. Offices with moderate or extensive technology use reported 87% satisfaction against 66% for low-level adopters.

Citi's survey also identified the barriers: 57% cited a lack of internal expertise, 34% a lack of awareness, 28% cybersecurity or privacy concerns and 25% uncertain return on investment. The spreadsheet persists because it is flexible and understood, and because the office's data arrives from a dozen sources in a dozen formats. The cost is that cash positions are reconciled monthly rather than daily, and capital calls are tracked by whoever opened the email.

Treasury and forecasting

Treasury in a family office is more complex than its size suggests, because the money is spread across entities, jurisdictions and currencies. UBS's 2026 Global Family Office Report found that 34% of offices operated in three jurisdictions and 32% in four or more, and that 47% of offices described themselves as over exposed to the US dollar, the only major currency where a substantial share said so. Each jurisdiction and currency adds a bank relationship, a tax calendar and a set of transfer rules.

The forecasting layer sits on top. Its inputs are the commitment schedule described in forecasting capital calls, the family's spending plan, tax instalments by entity, debt maturities and interest resets, and expected distributions discounted for the current environment. Its output is a rolling cash projection by month for the next year and by quarter thereafter, compared against the liquid reserve. UBS found that 68% of offices had a financial performance measurement process in place, which is the reporting foundation this forecast requires.

Outsourcing and cost

Most offices outsource some of the function. AlTi and Campden found that 79% outsourced at least part of investment management and that outsourcing accounted for 19% to 32% of total costs, with about a quarter of offices reporting consistently excellent service. UBS's 2026 report found cybersecurity outsourced by 52% of offices and handled in-house by 26%, with legal services outsourced by 75%.

The usual pattern is to keep consolidated reporting and treasury control in-house, because they touch every decision and every payment, and to outsource fund administration, tax compliance and parts of cybersecurity. Where an office outsources the reporting itself, the CFO's job becomes checking the aggregator's output and owning the forecast built from it. The articles on reporting to the family and on operating costs cover the output and the budget sides of the same function.

The personal CFO function is unglamorous and under-resourced in most offices. It is also the difference between knowing the office can meet next quarter's calls and hoping it can.