How to Calculate Practice Overhead and Your Minimum Rate

Most solo practitioners can quote their rent and maybe their software bill off the top of their head. Almost nobody can tell you what one hour of being in practice actually costs them before they’ve earned a dime. That gap is where underpricing lives — and it’s the reason a fully-booked calendar can still leave you feeling broke.

Here’s how to close it, with a worked example you can copy line for line.

What counts as overhead (and what doesn’t)

Overhead is the cost of existing as a practice — the bills that show up whether you see 40 clients or four. Rent doesn’t drop because you had a light week. Your malpractice premium doesn’t care how many depositions you took.

Keep two things out of the overhead bucket:

• Your own pay. What you draw is a separate line. Blending it into overhead hides whether the practice is actually profitable.
• Purely variable costs that scale per client — a per-claim billing fee, a translator you hire only for certain sessions. Track those, but don’t average them into your fixed monthly figure or you’ll double-count.

Annualize anything that hits once or twice a year. A $540 license renewal isn’t a December problem; it’s $45 a month you should already be pricing in.

Total your fixed monthly overhead

List every recurring cost, convert the annual ones to monthly, and add it up. Here’s a realistic month for a solo therapist renting a small office:

Your list will differ — an attorney swaps the EHR for case-management software and Westlaw, and probably carries higher rent. The categories hold. If you’d rather not build the spreadsheet by hand, our free Practice Overhead Calculator totals it and does the annualizing for you.

Find your break-even rate per session

Divide total overhead by the number of sessions you actually bill in a typical month — not the number you schedule. Cancellations and no-shows are real, so plan on the honest figure.

Say you schedule around 15 sessions a week but realistically bill about 55 a month once life happens:

$1,600 overhead ÷ 55 sessions = $29 per session

That $29 is what each session costs you before you’ve paid yourself a cent. If you’re charging a $30 sliding-scale rate, you’re essentially volunteering. Useful to know.

Set the rate you must actually charge

Break-even keeps the lights on. It doesn’t pay your mortgage or your quarterly taxes. The real minimum rate stacks three things: overhead, your take-home pay, and the tax you owe on that pay.

Continuing the example, suppose you want to draw $7,000 a month for yourself. As a 1099 earner you owe self-employment tax plus income tax, so set aside roughly 30%. To keep $7,000 after that, you need to earn about $10,000 in owner pay ($7,000 ÷ 0.70). Spread across 55 sessions:

So a “minimum” that felt like $150 in your head is really closer to $215 once overhead and taxes are in the math. Anything below it means you’re subsidizing your own practice out of savings — and price it a little higher, because this covers a good month, not a slow August.

What’s a healthy overhead ratio?

Your overhead ratio is fixed overhead divided by total revenue — a quick read on how much of every dollar gets eaten before you keep any of it.

In the example, 55 sessions at $215 brings in about $11,825. Against $1,600 of overhead:

$1,600 ÷ $11,825 = ~14% overhead ratio

Lean solo practices often land somewhere in the 15–30% range; a fully private-pay clinician working from a modest office can run lower, while group practices with staff and multiple offices climb well past 40%. There’s no single “right” number, but a couple of signals are worth acting on:

• Ratio creeping past ~35% as a solo? Either rent and software have bloated, or — more often — you’re under-billing and the denominator is too small.
• Ratio suspiciously low? Sometimes great, sometimes a sign you’re skipping real costs (no CE budget, no retirement contribution, underinsured).

Track the ratio quarterly, not obsessively. It’s a smoke detector, not a thermostat. Re-running your numbers in the Practice Overhead Calculator whenever a big cost changes — a rent bump, a new hire, a software switch — keeps the rate you charge in step with the cost of running the practice.

Frequently asked questions

Should my own salary be part of overhead?

No. Keep your pay as a separate line. Folding it into overhead hides whether the practice is genuinely profitable and makes your break-even look higher than it is. Overhead is the cost of being open; your draw is what’s left after.

How do I handle costs that only hit once a year?

Annualize them. Divide the yearly cost by 12 and add it to your monthly total. A $540 license renewal becomes $45 a month. This stops annual bills from ambushing you and keeps them priced into every session.

What session count should I use in the math?

Use the number you realistically bill in an average month, after cancellations and no-shows — not your fully-booked ideal. Using the optimistic figure understates your per-session cost and leads straight to underpricing.

How much should I set aside for taxes when setting my rate?

A common rule of thumb for 1099 professionals is roughly 25–35% of profit for combined self-employment and income tax. Thirty percent is a reasonable planning number, but confirm with your accountant — your bracket, state, and entity type all move it.

What if my market won’t support the minimum rate I calculated?

Then the math is telling you something before your bank account does. Your levers are volume (bill more sessions), overhead (trim or renegotiate fixed costs), or payer mix (add private-pay clients). Discounting below your true minimum isn’t a fourth option — it’s a slow loss.

How often should I recalculate?

At least once a year, and any time a major cost changes — a rent increase, a new hire, an insurance jump, or a software switch. Your rate should move with your real costs, not lag a year behind them.