CPA Firms: Smoothing Cash Through a Brutal Tax Season

Say a firm bills the bulk of its annual revenue between February and April, but salaries, rent and software subscriptions run flat every month of the year. Cash builds up fast during that stretch, and it is tempting to treat that balance as available for a bonus pool, an office upgrade or a partner distribution the moment tax season wraps. If the firm hasn't modeled how much of that cash needs to carry the practice through the slower summer and fall months, a decision that felt reasonable in May can leave the firm tight on cash by October. A controller tracking monthly burn against the actual seasonal revenue curve, not a flat annual average, is what catches this before it becomes a problem.

Tax and audit engagements that start before a deadline and wrap up after it create work in progress the same way any project-based engagement does, and a firm billing only at completion can have a large chunk of earned value sitting unbilled during the exact weeks it needs cash the most. A controller who tracks WIP by engagement and pushes interim billing on longer engagements, rather than waiting for full completion, directly improves the firm's cash position during its tightest months without changing a single client relationship.

Once the books are accurate, the harder questions are strategic: should the firm build a cash reserve specifically sized to bridge from April to the next revenue season, how should partner distributions be timed so the firm isn't distributing cash it will need again in six months, and does the firm's staff-to-partner ratio, the number of staff accountants supporting each partner, actually support the growth the partners want. A fractional CFO models these tradeoffs explicitly instead of leaving them to whatever cash happens to be in the account when the question comes up.

A seasonal cash plan for a CPA practice should include these steps:

• Build a monthly cash model from the firm's actual seasonal billing pattern, not a flat annual average.
• Size a cash reserve to carry payroll, rent and software through the slower stretch from April to the next revenue season.
• Time partner distributions and bonus pools against that model, not against whatever cash sits in the account after tax season ends.
• Track work in progress by engagement and bill interim progress on longer engagements, so earned value does not sit unbilled during the tightest weeks.

The national median salary for accountants and auditors is $83,680 a year, and a firm's own staff compete in that same labor market the firm's clients hire from, which is worth remembering when a partner wonders why controller-level hires cost what they do¹. For a smaller practice, a fractional CFO who builds a seasonal cash model once, then updates it quarterly, often covers the need without a dedicated controller. That case for a dedicated hire strengthens once the firm runs enough concurrent engagements that WIP tracking is a daily job rather than a quarterly cleanup.

Firms that perform attest work are generally subject to a peer review requirement on a recurring cycle, and ownership of a CPA firm is restricted in most states to licensed professionals above a minimum ownership share. Neither of these is a finance department decision; they belong with the firm's own professional standards committee or an attorney familiar with the state's accountancy rules. What finance can do is make sure the numbers that feed into a peer review, and any ownership-related buyout or partner-admission calculations, are clean and well-documented well before either one comes up.

A firm that waits until the week before a peer review, or the week a new partner is being admitted and bought in, to reconcile a year's worth of WIP and engagement files is setting itself up for a rushed, error-prone scramble at exactly the moment accuracy matters most. Say a firm's peer review is scheduled for the fall and nobody has closed the books cleanly since the spring tax season ended: the resulting cleanup competes for staff time with actual client work, and errors found under that kind of time pressure are more likely to slip through. A controller who keeps monthly close current year-round, not just during and right after tax season, removes that entire category of self-inflicted stress, and turns what would otherwise be a stressful, once-a-year fire drill into a routine review that takes an afternoon instead of two weeks.