A dental practice break-even analysis calculates the revenue needed to cover a defined set of costs. For an operating model, divide fixed operating costs by the contribution-margin ratio. Then build a separate cash forecast: reaching operating break-even does not guarantee enough money for loan principal, capital purchases, taxes, or owner distributions.
The worked example below is entirely illustrative. None of its dollar amounts, percentages, or visit assumptions is an industry benchmark. Use your own records and have your CPA review the classifications, accounting basis, and owner-compensation treatment.
Define the question before opening the spreadsheet
This example asks: “How much monthly net patient-service revenue covers operating costs at the current staffing and service mix?”
Here, net revenue means recognized patient-service revenue after applicable adjustments, rather than the office's full-fee production total. Operating costs include depreciation and an explicit cost for the owner's clinical work. They exclude interest and income taxes. Loan principal and distributions are not operating expenses.
Your books may present owner pay differently. Ask the CPA to reconcile the management model to the financial statements, especially when distributions are being used to fund personal living costs. Do not omit the economic cost of the owner's labor simply to produce an attractive threshold.
Start with reconciled records from the dental practice overhead review. Overhead percentage describes expenses relative to revenue at an observed level; break-even asks what revenue level would cover the modeled costs.
Sort costs by how they behave
Fixed costs remain roughly constant within a defined operating range. Variable costs change with activity. Mixed costs have both components, and some costs jump when capacity expands.
| Cost example | Planning treatment to investigate |
|---|---|
| Base rent | Fixed during the modeled period |
| Core scheduled payroll | Fixed within the current staffing range |
| Lab fees and procedure-specific materials | Variable with the relevant service mix |
| Compensation tied to defined production or collections | Variable under the actual agreement |
| Software base fee plus usage charges | Split into fixed and variable components |
| Additional staffed day | A step increase requiring a revised model |
A cost is not variable merely because you could eventually cancel it. Core payroll does not automatically decline when tomorrow's schedule has openings. Conversely, treating all payroll as fixed can miss production-based compensation.
The SBA's break-even calculator uses fixed costs divided by per-unit contribution and distinguishes fixed, variable, and mixed costs. For a practice with multiple services, a revenue-based contribution ratio can be more useful than treating every appointment as identical. SBA break-even calculator
Calculate the illustrative monthly threshold
Assume this operating model:
| Fixed monthly cost | Illustrative amount |
|---|---|
| Core team payroll and related costs | $30,000 |
| Owner clinical labor cost | $20,000 |
| Occupancy and baseline utilities | $8,000 |
| Recurring office, technology, insurance, and administrative costs | $10,000 |
| Depreciation | $4,000 |
| Total fixed operating costs | $72,000 |
Assume variable costs are 20% of net revenue at the modeled service and payer mix. This includes the costs classified as variable, without counting any fixed-table expense again.
Contribution-margin ratio = 1 − variable-cost ratio
1 − 0.20 = 0.80, or 80%
Operating break-even revenue = fixed operating costs ÷ contribution-margin ratio
$72,000 ÷ 0.80 = $90,000 per month
Check the answer: at $90,000 of net revenue, variable costs are $18,000. The remaining $72,000 covers fixed costs exactly. Operating profit is zero.
At $110,000 of net revenue, the same assumptions produce:
$110,000 − $22,000 variable costs − $72,000 fixed costs = $16,000 operating profit
The model only holds while the staffing range, prices, adjustments, service mix, and cost behavior remain consistent with those assumptions.
Show why profit and cash can disagree
Suppose the practice earns the illustrative $16,000 operating profit above, but some revenue remains uncollected. It also makes a loan payment and buys equipment.
| Bridge from operating profit to change in cash | Amount |
|---|---|
| Operating profit | $16,000 |
| Add back noncash depreciation | +$4,000 |
| Increase in accounts receivable | −$12,000 |
| Increase in accounts payable | +$3,000 |
| Interest paid | −$2,000 |
| Loan principal paid | −$6,000 |
| Capital equipment paid for | −$8,000 |
| Illustrative change in cash before income taxes and distributions | −$5,000 |
This simplified bridge assumes the owner's modeled labor cost was an actual paid expense and there were no other cash movements. It shows how a profitable operating month can still reduce cash. The SEC's financial-statement guide distinguishes operating income from cash flow, including noncash depreciation, working-capital changes, equipment spending, and borrowing or repayment. SEC guide to financial statements
Do not put the full loan payment into operating expenses and then subtract principal again in the cash forecast. Keep interest, principal, and capital spending in their correct places. Use the startup-cost budget for opening deposits and other one-time cash needs that this recurring operating model does not capture.
Change the assumptions before trusting the target
Here is the effect of changing the same illustrative model:
| Scenario | Fixed costs | Variable-cost ratio | Break-even net revenue |
|---|---|---|---|
| Base case | $72,000 | 20% | $90,000 |
| Higher variable costs | $72,000 | 25% | $96,000 |
| Higher fixed costs | $78,000 | 20% | $97,500 |
| Both changes | $78,000 | 25% | $104,000 |
Investigate what would cause each change. A different procedure mix may increase lab costs; an additional employee may raise fixed costs before revenue grows. Lower net reimbursement can change both the revenue outlook and the variable-cost percentage.
If modeled variable costs consume all revenue, the contribution ratio is zero or negative and this formula provides no attainable break-even threshold. Recheck the inputs and the operating model rather than dividing by zero or reporting a negative sales target.
Check whether the office can deliver the required volume
At 20 clinical days per month, the $90,000 threshold equals $4,500 in net revenue per day. If a stable blended average were $450 per completed visit, that would imply 10 completed visits per day. Both assumptions are illustrative.
Test that result against appointment duration, provider and hygiene availability, equipment, staffing, and patient demand. A blended visit average can hide important differences between services. Never turn the financial target into a reason to recommend unnecessary care or compress appointments beyond appropriate limits.
Use the marketing-budget process only after confirming usable capacity and the economics of additional demand.
Keep a monthly worksheet with actual net revenue, fixed costs, variable costs, operating result, cash movement, and the assumptions that changed. The most useful output is a decision: whether the current model can cover its costs, what would move the threshold, and whether the cash plan can support the path there.
