Separate the opening bill from the monthly bill.
A single startup total can hide when cash is needed. Start with separate lists for one-time setup costs and recurring operating expenses. The SBA uses this distinction in its startup-cost guidance. Then add when each payment is due, so the plan reflects timing as well as totals.
For each line, record the source: a vendor quote, lease proposal, staffing plan, or your own estimate. Flag estimates clearly. You can replace them as better information becomes available without rebuilding the whole plan.
Keep the assumptions beside the numbers.
Your forecast should explain what you expect to happen. Record the planned clinical schedule, the number of providers, how quickly visits may build, and your estimate of collections. Avoid treating a listed charge as cash that will necessarily arrive in the bank.
Review the start month for each expense. A system may begin charging before your first patient arrives. A new team member may need paid training before opening. Those differences belong in the plan, even if they are easy to miss in a simple annual total.
- Which expenses start before opening?
- Which amounts are confirmed and which remain estimates?
- What changes if the opening date moves?
- What is included in each vendor quote, and what is billed separately?
Change one assumption and look at the effect.
Create a base case, then explore a slower start. Try changing patient volume, collection timing, or the expenses you expect before opening. Label each version so you can compare what changed and why. These are planning scenarios, not predictions of a particular practice’s results.
Look for the months when available cash falls lowest. That can help frame a conversation with your accountant or financing adviser about the assumptions, funding needs, and choices available to you. Keep personal living costs visible in your wider planning, even when they are separate from practice expenses.
Update the forecast when a decision becomes real.
Use the pro forma builder to explore the first 24 months, then download Excel if you want to continue working with the numbers. The opening date labels the forecast months; changing it alone does not add delay costs. To model a later opening, explicitly update pre-opening expenses and other affected assumptions. Replace estimates with actual quotes and expenses as the project progresses. The online model is a planning aid; an adviser can help assess financing, accounting, and tax decisions for your circumstances.
Further reading
Sources consulted October 8, 2026.
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