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 consume dental cash invisibly.
- 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.
The depreciation illusion
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.
Plan equipment against the cycle, not the tax year
Large equipment decisions are frequently driven by year-end tax planning, which is a legitimate consideration and a poor primary one. 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.
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, not primarily on the tax deduction. 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.
Dental resource center.
Or read the cross-practice version: cash flow in practice accounting →
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