I spent six years reading corporate P&Ls before I ever walked into a med spa. When I started talking to owners, NPs and PAs running real practices, almost none of them knew their actual margins. Not roughly. They genuinely didn't know.
Allergan invoices were hitting the books as office supplies. Botox COGS were missing from service revenue entirely. QuickBooks was set up like a generic small business, not a service-line practice. The bookkeeper was categorizing transactions, not reconciling them. Injectable margins showed 80% on paper when the real number was 45-55%. Device leases were just an expense line, nobody tracking whether the laser was paying for itself.
These are clinicians making capital decisions on numbers that were quietly wrong.
Spa Ledger fixes the books for medical spas. Weekly P&L by service line, injectable COGS reconciled against vendor invoices, device ROI and break-even tracking, deferred revenue handled correctly. $499/month, $399/month annual, first month free.