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Minimum Viable Financial Model

L3Business analysisFinancequantitativeStages 0 to 2

Reference model

The minimum viable financial modelOn the left, three steps: unit price less unit cost gives the margin on each unit; units sold times that margin less fixed costs gives the monthly profit; profit adjusted for when customers pay and for launch costs gives cash. On the right, a cash curve that starts positive, dips below zero to its lowest point, which is the funding needed, and recovers once the break-even month passes.FROM ONE UNIT TO CASH1Unit marginUnit price− Unit cost= Margin on each unit2Operating profit× Units sold− Fixed costs= Profit each month3CashProfit+ When customers pay− Launch costsCash = 0MonthsCASH BALANCEStarting cashLowest cash: the fundingyou need before you launchBreak-even month:profit turns positive,cash still fallingBreak-even volume = fixed costs ÷ margin on each unitThe cash curve dips because costs are paid before customers pay.A later collection date makes the dip deeper and longer.Replace the guesses with actuals once there is trading history.

Margin per unit times units sold, less fixed costs, gives profit; timing of collections turns profit into cash; cash tells you how much funding you need.

About this model

A single sheet that answers the questions a new venture cannot dodge: does each unit sold earn a margin, how many units cover the fixed costs, and does the cash last until it does? It is built before a full three-statement model is worth the effort, from assumptions, and replaced by actuals once there is trading history.

Lean-startup practice: the “minimum viable” idea of Eric Ries applied to finance, alongside Ash Maurya’s Lean Canvas — a one-sheet unit-economics and twelve-month cash model · 2010s

How to read it

  • Enter what one unit sells for and costs to make (variable costs only), how many you expect to sell in the first month and how fast that grows.
  • Add the fixed costs you pay every month whether you sell or not, any one-off launch costs, and the cash you start with.
  • Read three results: the break-even volume (units a month needed to cover fixed costs), the month profit turns positive, and the lowest cash balance — if it goes below zero, that is the funding you need before you launch.

What this does

A one-sheet cash and unit-cost projection — enough to know if the idea can plausibly become a real business — built before a full three-statement model is worth the effort.

When to use it

Ideation through early Startup, before there is enough transaction history for the Three-Statement Financial Model to be more than guesswork.

Not when: Once there are 6+ months of real transactions — switch to the Three-Statement Financial Model, which uses actuals instead of assumptions.

What happens next

Once assumptions are replaced by real transaction history, this graduates into the Three-Statement Financial Model.

Golden thread

Builds on ←

  • leancanvas

Feeds into →

  • financial

Framework library: Financial (layer L3), lifecycle stages 0 to 2.

Use this tool, free

Sign in to open the worksheet. Your work saves as you type, the AI can draft the parts you have not filled in, and you finish with an analysis and a 30/60/90-day action plan.

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Hand-built by Eccellere and reviewed by Eccellere on 02/11/2026. Guidance, not advice: apply your own judgement.