Calculator · Excel + PDF

The Practice P&L Diagnostic.

Three-year internal anomaly detection across a UK GP practice P&L.

What this Calculator is for

Most P&Ls look fine on first read. The lines that matter — the ones a competent reader would ask about — are usually obvious only on comparison: a line whose ratio to revenue has drifted year-on-year, a cost that's grown faster than the funding base it should track, a one-off entry that recurs across multiple years in slightly different forms.

The user enters three years of the practice's P&L. The Calculator runs the figures through a structured anomaly framework and produces a flagged report identifying which lines are worth asking about, and what the question should be.

What's inside

7 sheets in a single Excel file, plus an accompanying PDF user guide.

  1. Inputs — three years of the practice's P&L, as it appears in the accounts
  2. Normalisation — accounting-line standardisation across formats
  3. Ratios — the key ratios the Diagnostic monitors
  4. Flags — anomalies surfaced by category, with severity indicators
  5. Questions — the specific questions to ask, against each flag
  6. Summary — a one-page output for board or accountant discussion
  7. Methodology — what the Diagnostic does and does not do

How it reads

"An anomaly is not evidence of a problem. It is evidence that the figure has moved further than the figure normally moves, which is a different and more useful thing. Most flagged lines, on investigation, turn out to have legitimate explanations."
— from the PDF user guide, Reading the flags

Who it's for

  • Partnership candidates in diligence. Turns three years of accounts into a structured set of questions you can put to the practice.
  • Partner boards on annual review. Surfaces the lines your partnership should actually discuss in the year-end review.
  • Practice managers in handover. The fastest route into the practice's commercial reality if you've just arrived in post.

What's not in this Calculator

It is a tool, not regulated advice. It does not provide personalised financial, legal, or tax recommendations. Those require a qualified professional who knows your full circumstances. The calculator's purpose is to make those conversations substantive rather than passive.

It focuses on UK clinical practice specifically — the regulatory and commercial environment of the UK.

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