Skip to content

Building an incremental project cash-flow model

A project model compares dated cash flows under a proposal with dated cash flows under a specified alternative.

On this page

Describe what happens without the proposal

A fictional firm can continue its current process or install new equipment. Write the baseline activity and expected cash flows before describing the equipment’s benefits. A benefit that would occur under both alternatives is not an incremental gain from installation.

Build a dated bridge

Model layers
LayerQuestion
Initial outlaysWhat additional amounts occur now?
OperationsWhich receipts and cash costs differ by period?
Other business effectsWhich existing activities change?
Working capitalWhen are balances funded and released?
Terminal amountsWhich closing amounts are actually modeled?

Keep the cash-flow and rate perspectives consistent

This cluster uses stated project cash flows and explicit per-period rates. If a model discounts operating flows using a financing-adjusted rate, adding the same financing cost again as a project outflow can double count it. State the selected perspective rather than mixing boundaries.

Keep uncertain inputs visible

After-tax status, recovery of balances and terminal proceeds are assumptions to document. A positive result is conditional on the forecast and rate; it does not verify the commercial proposal. The model worksheet and worked bridge below show the arithmetic separately from those judgments.

Further references