Cash Days on Hand: How Much Should an ABA Clinic Actually Keep?

The bulletin arrives in March and the cut takes effect in July. Four months of warning, which sounds generous until you start doing anything with it.

The owner's question is not whether the cut is bad. It is obviously bad. The question is how long the clinic can absorb it while adjusting staffing, renegotiating a payer agreement, and tightening utilization, because every one of those takes months to produce results. What she needs to know is how much runway she is working with.

Nobody in the building can answer. The bookkeeper knows the bank balance, the biller knows what is outstanding, and neither of those is runway. Runway is a different calculation, and most clinics have never run it.

What cash days on hand measures

The formula is your average daily cash balance divided by your average daily cash outflows, which produces the number of days you could keep operating if every dollar of incoming revenue stopped tomorrow.

It is a deliberately pessimistic scenario and that is the point. Revenue rarely stops entirely, and it slows for all kinds of ordinary reasons, including a payer system migration, a documentation audit, a denial wave after a rule change, or a bad stretch of cancellations. Cash days on hand tells you how much disruption you can survive without borrowing, delaying payroll, or funding the business out of your own account.

Include everything that leaves the building, meaning payroll and burden, rent, software, insurance, and loan payments. Exclude the receivables, because money you are owed is not money you have, which is the entire premise of the measurement.

What businesses actually hold

The conventional advice is three to six months of operating expenses, and it is worth knowing how far that sits from reality before you judge your own number against it.

The most comprehensive dataset available comes from the JPMorgan Chase Institute, which analyzed over 470 million transactions across 597,000 small businesses and found the median holds 27 cash buffer days. The spread underneath that median matters more than the median itself, since the bottom quarter operate on fewer than 13 days while the top quarter hold more than 62.

Two findings in that research speak directly to ABA. Businesses in higher-wage service industries hold around 31 days, and labor-intensive businesses hold roughly 23 compared with 38 for capital-intensive ones. ABA sits squarely in the labor-intensive category, where payroll dominates outflows and there is very little to cut quickly when revenue slows.

Worth noting the study draws on 2015 transaction data, so treat the figures as a structural picture of how small businesses hold cash rather than as a current-year benchmark. The shape of that distribution has held up in subsequent work.

Why ABA clinics need more than the median

Here is the structural problem, and it is arithmetic rather than opinion.

Payroll runs on a fixed calendar, typically every two weeks, which means twenty-six cycles a year and several months containing three. Reimbursement runs on the payer's calendar. MGMA's 2024 data puts median days in accounts receivable at 47 for medical practices, and Medicare's payment floor legally prevents electronic clean claims from being paid before day fourteen regardless of how fast you submit.

Put those together and you are funding roughly three payroll cycles before the revenue from the first one arrives. That gap is permanent and structural, not a sign that anything is broken. It simply means an ABA clinic is always financing a month or more of its own labor, and the buffer has to be sized for that reality rather than for a business that gets paid at the point of service. It is also why payroll week feels the way it does.

Growth makes it worse before it makes it better. Adding technicians means adding payroll immediately while the corresponding revenue arrives six to eight weeks later, which is why clinics sometimes feel tightest during their best quarters. Expansion consumes cash even when it is working.

Setting a target you can defend

Rather than adopting a number from an article, size the buffer against the specific disruptions your clinic could plausibly face.

Start with the payroll floor, which is the minimum that keeps you solvent through your longest normal gap between reimbursement cycles. For most practices that lands somewhere around 30 days, and it is a floor rather than a target.

Then add for your actual exposure. A clinic with one payer representing most of its revenue needs more than one with a balanced mix, because a single payer's system change or audit can slow most of your cash at once. A clinic in a state that cut rates this year needs more, since absorbing a cut while restructuring takes quarters rather than weeks. A clinic planning to hire needs more, because each new technician is several weeks of payroll before the first claim pays.

Most independent ABA practices should be aiming somewhere between 60 and 90 days once those factors are accounted for, which is well above the small business median and well below the aspirational six-month figure. If you are at 20 days, the honest first goal is 30, not 90.

Building the buffer without starving the business

The instinct is to fund reserves out of profit, which works slowly and usually gets interrupted by the first unexpected expense.

The faster path runs through collections. A practice recovering a few points of net collection rate, or working denials it currently writes off, is converting money it already earned into cash it already spent the costs to produce. That is the cheapest capital available and it requires no new clinical capacity. Tightening the gap between service delivery and claim submission does similar work by pulling the whole cycle forward.

Treat the contribution as a fixed expense rather than a leftover, meaning a set transfer on a set schedule that gets protected the way payroll does. Build during strong months specifically because those are the months it feels unnecessary.

A line of credit belongs in the plan as a bridge rather than as the reserve itself. It costs money, it can be reduced or pulled precisely when conditions turn, and a clinic relying on one to make payroll has a liquidity problem rather than a financing solution. Establish it while the numbers look good, since that is when terms are best and when nobody is asking hard questions.

Back to the bulletin

Four months of warning is genuinely useful if you know your runway, because it tells you whether to make measured adjustments or move immediately.

The clinics that handled this year's rate changes well were mostly not the ones with the best forecasting. They were the ones who knew their number, which let them respond on a timeline they chose instead of one imposed by the bank balance. That is what a reserve buys, and it is why this belongs on the dashboard next to margin and collections rather than being something you check when it is already tight.

Frequently asked questions about cash days on hand

How do you calculate cash days on hand?

Divide your cash balance by your average daily operating expenses. Include payroll, rent, software, insurance, and debt service, and exclude accounts receivable.

How much cash should an ABA clinic keep?

Most independent practices should target 60 to 90 days once payer concentration, growth plans, and rate exposure are accounted for. Thirty days is a reasonable floor and a realistic first milestone.

Is a line of credit the same as a cash reserve?

No. Credit can be reduced or withdrawn during exactly the conditions that create the need for it. Use it as a bridge alongside a reserve rather than in place of one.

Why does my clinic feel cash-poor during good months?

Growth consumes cash ahead of producing it, since new staff generate payroll immediately while their revenue arrives weeks later after claims process.

What is a typical cash buffer for a small business?

Research covering nearly 600,000 small businesses found a median of 27 days, with labor-intensive businesses closer to 23. ABA clinics are labor-intensive and generally need more than that median.

If you want to know your actual cash days on hand and what it would take to get where you should be, that is exactly what our financial assessment is built to establish.