Why dental profit and cash diverge.
Dental cash flow is shaped by three things the P&L reports incompletely: equipment and buildout financed over years, with principal payments consuming cash while only depreciation appears as expense; practice acquisition or partner buy-in debt on the same footing; and a collection cycle where insurance pays on its own schedule while payroll and lab bills do not.
Four things that use dental cash
- Loan principalNot an expense, so it never appears on the P&L, but it leaves the bank account every month. The most common explanation for profitable-but-tight.
- Equipment purchasesA CAD/CAM or imaging system is capitalized and depreciated over years while the cash left immediately or is financed.
- Lab payables ahead of collectionsLab invoices come due on standard terms while the associated case may still be awaiting insurance payment.
- Membership plan cash spent earlyAnnual membership fees collected up front cover care still owed across the plan year.
Depreciation and cash
A practice can show $200,000 of profit and have visibly less than that available, because loan principal, which is not an expense, consumed a large share of the cash. Owners reading only the P&L conclude the numbers are wrong. They are not; they are answering a different question.
The fix is a monthly report that reconciles profit to cash: start with net income, add back depreciation, subtract principal payments and equipment purchases, adjust for changes in receivables and deferred revenue. Once an owner sees that bridge, the confusion generally ends permanently. Our dental practice accounting shows you that bridge from profit to cash.
Planning equipment purchases
Large equipment decisions are frequently driven by year-end tax considerations, which your CPA is the right person to weigh. The relevant question is whether the practice's cash position and debt service can carry the addition, and whether the equipment will generate enough incremental production to justify it.
Modeling that before the purchase, incremental cases, incremental revenue, monthly obligation, break-even month, turns a tax-driven impulse into a business decision that happens to have a tax benefit.
When cash flow turns negative
A profitable dental practice can still run short every month, because profit and cash answer different questions. Profit asks whether the work was worth more than it cost. Cash asks whether the money arrived before the bills did.
Four causes account for most of the gap. Collection lag means production turns into cash weeks later while payroll is due now, and the gap grows as the practice grows. Loan principal and equipment purchases leave the bank account without appearing as expenses. Membership fees collected up front get spent before the care is delivered. Equipment expensed in full in the year of purchase makes later years show profit while the loan payments continue.
The profit-to-cash bridge described above shows which cause applies. The fix is then usually specific, such as shortening the collection lag, restructuring a note, or no longer treating membership money as available. That works better than the broad cost cutting a cash squeeze tends to set off.
Frequently asked
Why is my dental practice profitable but short on cash?
Most often loan principal. Principal payments are not an expense and never appear on the P&L, but they leave the bank account every month. Combined with equipment purchases that are capitalized rather than expensed, a practice can report solid profit while having considerably less cash available than that figure suggests.
How should a dental practice evaluate an equipment purchase?
On incremental production and cash capacity. The tax treatment is a question for your CPA. Model the additional cases the equipment enables, the revenue those generate, the monthly financing obligation, and the month at which it breaks even. The tax benefit is real but should be a consequence rather than the reason.
What is a profit-to-cash bridge?
A short monthly report reconciling net income to actual cash movement: net income, plus depreciation, minus loan principal and equipment purchases, adjusted for changes in receivables and deferred revenue. It is the fastest way to end the recurring confusion about where the profit went.
Does debt principal show up on a profit and loss statement?
No. Interest does, and principal does not. A practice with significant equipment debt will show profit that is not available as cash.
Dental resource center
Or read the cross-practice version: cash flow in practice accounting →