BUSINESS BITES — Statement of Cash Flows & P&L Statement
Here’s where many dentists get caught off guard. Your P&L can show a healthy profit while your bank account tells a completely different story. Understanding why requires reading the Statement of Cash Flows alongside your P&L, not instead of it.
The Statement of Cash Flows breaks your money movement into three categories:
Operating activities covers your day-to-day income and expenses:
Collections, payroll, supplies, and similar items
Investing activities covers the purchase or sale of assets:
A new CBCT, a laser, a practice renovation, etc.
Financing activities covers loans, debt repayments, and owner distributions.
Together these three sections explain the gap between what your P&L shows and what your bank balance reflects.
Consider a simple example. Your P&L shows $40,000 in profit for the month. But your bank account only went up by $10,000. The Statement of Cash Flows reveals exactly what happened: you bought $20,000 in new equipment (investing activity), paid down $10,000 in loan principal (financing activity), and took a $5,000 owner draw. None of those three transactions appear on your P&L as expenses, but all of them moved real cash out of your practice.
This is one of the most important distinctions in dental practice finance, and one that dental CPAs see cause problems repeatedly. A practice that looks profitable on paper can still run out of cash, and often does, when equipment purchases, loan payments, and owner draws are all drawing from the same account that the P&L never accounts for.
What your cash flow statement tells you that your P&L can’t
The cash flow statement answers five questions that your P&L simply cannot.
First, are you actually building cash reserves? Profit doesn’t guarantee liquidity, and the cash flow statement shows whether your bank balance is growing or quietly shrinking.
Second, how much are you reinvesting in the practice? Equipment purchases and renovations show up in the investing section, giving you a clear picture of your reinvestment trends over time.
Third, are debt payments strangling your cash flow? Loan principal payments don’t appear on the P&L at all, only the interest portion does. The cash flow report is the only place where the full weight of your debt service becomes visible.
Fourth, what are you actually taking home? Owner draws don’t affect net profit, but they reduce available cash. The financing section shows you exactly what you pulled out of the business in any given period.
Fifth, can you sustain growth? If operating cash flow is positive but cash is still tight, that’s often a signal that expansion requires more working capital than the practice currently has, a critical insight before signing a lease on a second location.
How to read your P&L monthly and what to pair it with
Pull your P&L on the first of every month for the prior month. Compare each line item as a percentage of collections, not as a raw dollar figure, so that months with different production volumes are comparable. Look for three things: any category that has moved more than one percentage point from the prior month, any category that has been trending in the wrong direction for three consecutive months, and your collections rate, which should never drop below 98% without an immediate investigation.
Then pull the cash flow statement alongside it. If net income is strong but operating cash flow is weak, you have a collections or billing problem. If operating cash flow is healthy but overall cash is falling, debt service or owner draws may be outpacing what the practice can sustain. The two reports read together take about fifteen minutes and give you a complete picture of your practice's financial health that either one alone cannot provide.
Share both with your dental CPA quarterly at minimum. A general accountant will tell you whether your numbers add up. A dental specific CPA will tell you whether your numbers are good, and whether the story your P&L is telling matches the reality your cash flow statement reveals.
