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Blog · Territory, capacity and quota planning · Finance and FP&A teams

Capital budgeting and cash flow analysis: build the project case

Build an incremental project cash-flow schedule from revenue, cost and investment records. Separate sunk costs, working capital changes and terminal proceeds, then reconcile the complete case.

The short answerCapital budgeting and cash flow analysis estimates the cash a business gains or spends because it accepts a project. Compare the business with and without the investment, calculate incremental operating cash after taxes, subtract capital outlays and working capital increases, and add terminal proceeds. Exclude sunk costs and reconcile every assumption to supporting records.

Capital budgeting and cash flow analysis measures the incremental cash a company expects from accepting an investment. Build a with-project versus without-project case, then account for operating changes, cash taxes, equipment payments, working capital and closeout proceeds. The result is a dated cash schedule that finance can evaluate and challenge.

The schedule comes before the return calculation. A precise discount rate cannot repair a missing investment, an unsupported cost saving or a cost that would happen anyway.

Start with the decision and the baseline

Write down the alternative to accepting the project. That may be continuing with existing equipment, outsourcing production or abandoning a product. The baseline should include credible future changes; it is not automatically last year's results held flat.

For each revenue or cost line, ask what changes between those alternatives. Exclude unrecoverable spending already incurred. OpenStax's discussion of relevant costs explains why sunk costs and future costs that do not differ between alternatives are irrelevant to the decision.

Include consequences outside the project department. A new product may displace existing sales. An unused building may have a rental alternative. A central support charge matters only to the extent that accepting the project changes the company's cash, rather than simply reallocating an existing cost. The detailed incremental cash-flow analysis guide covers these boundary decisions.

Gather the exports and label each assumption

Use the records below to test a proposed project's inputs. Keep the source period, account definition and responsible owner beside each assumption. Historical evidence supports the estimate; it does not prove that the future will repeat.

Project input Starting record Required check
Additional sales Invoice and sales exports Remove displaced sales and unsupported volume
Variable production costs Purchase, payroll and production records Match the volume and cost basis to projected sales
Added fixed costs Contracts, staffing plan and cost-center detail Include only costs caused by the project
Capital outlays Supplier quotations and payment milestones Include installation and dated payments
Working capital Receivables, inventory and payables exports Forecast incremental balances and their changes
Cash taxes and disposal Tax schedule and disposal assumptions Confirm deductions, timing and net proceeds

Set one sign convention: positive project cash is an inflow, negative project cash is an outflow. Keep the investment date separate from operating years. Label annual periods clearly and schedule advance stock purchases when they must actually be funded.

Calculate operating cash from the incremental rows

Consider a US packaging business evaluating equipment costing $300,000, paid before Year 1. The project runs for three years. A prior feasibility study cost $20,000 and cannot be recovered. An annual corporate allocation of $15,000 will continue with or without the project. Both are excluded from the decision cash flows.

The company expects the following changes. The opportunity cost is forgone rental income from floor space used by the project. Assume tax depreciation of $100,000 per year and an illustrative combined cash tax rate of 25%, paid in the same year. This is a simplifying assumption, not a statement of statutory rates or available tax deductions.

Incremental operating item Year 1 (USD) Year 2 (USD) Year 3 (USD)
Revenue after displaced sales 300,000 330,000 350,000
Variable operating costs 155,000 165,000 175,000
Added fixed cash costs 25,000 25,000 25,000
Forgone rental income 10,000 10,000 10,000
Cash operating surplus before tax 110,000 130,000 140,000
Tax depreciation 100,000 100,000 100,000
Taxable operating profit 10,000 30,000 40,000
Cash taxes at 25% 2,500 7,500 10,000
Operating cash after tax, before NWC 107,500 122,500 130,000

Operating cash after tax, before working capital = (Incremental revenue − Incremental cash costs − Tax depreciation) × (1 − Cash tax rate) + Tax depreciation

All amounts are exact whole dollars. Year 1's taxable operating profit is 300,000 − 155,000 − 25,000 − 10,000 − 100,000 = $10,000. Cash tax is 10,000 × 25% = $2,500. Operating cash is 10,000 − 2,500 + 100,000 = $107,500.

Damodaran's corporate finance teaching notes describe this bridge from operating earnings to cash: add back noncash depreciation, subtract capital expenditure and subtract increases in noncash working capital.

Use formulas that preserve the audit trail

In a spreadsheet, put the operating table in rows 2 through 10, with Year 1 in column B: revenue in row 2, the three cash cost lines in rows 3 through 5, surplus in row 6, depreciation in row 7, taxable profit in row 8, tax in row 9 and operating cash in row 10. Put the 25% tax assumption in F2.

In B6, calculate the cash operating surplus:

=B2-SUM(B3:B5)

In B8, subtract tax depreciation:

=B6-B7

In B9, calculate the assumed cash tax:

=B8*$F$2

In B10, subtract tax and add back depreciation:

=B8-B9+B7

Copy these spreadsheet formulas across the operating years. If losses occur, replace the simplified tax formula with a finance-approved cash tax schedule; a loss does not automatically produce an immediate cash refund.

Add capital outlays, working capital and terminal proceeds

The project needs $40,000 of operating working capital before Year 1, another $5,000 before Year 2 and another $5,000 before Year 3. Its final $50,000 is fully released at closeout under the stated collection and inventory assumptions. Noncash working capital guidance explains why increases tie up cash; the project working capital article covers funding and recovery in detail.

Assume equipment is sold at closeout for $40,000 with zero remaining tax basis. Under this example's simplified 25% disposal tax assumption, tax is (40,000 − 0) × 25% = $10,000, leaving $30,000 of after-tax proceeds.

Project cash item Start (USD) End Year 1 (USD) End Year 2 (USD) End Year 3 (USD)
Operating cash after tax 0 107,500 122,500 130,000
Equipment payment -300,000 0 0 0
Working capital cash flow -40,000 -5,000 -5,000 50,000
Equipment proceeds after tax 0 0 0 30,000
Net project cash flow -340,000 102,500 117,500 210,000

With the four components in rows 14 through 17 and each period in a column, the net cash formula is:

=SUM(B14:B17)

Copy it across the periods. The capital budgeting cash-flow projection guide carries this schedule into driver assumptions and scenario comparisons.

Prove the schedule before evaluating returns

Operating cash totals 107,500 + 122,500 + 130,000 = $360,000. Working capital cash totals −40,000 − 5,000 − 5,000 + 50,000 = $0. The project total is therefore 360,000 − 300,000 + 30,000 = $90,000.

The dated schedule gives the same result: −340,000 + 102,500 + 117,500 + 210,000 = $90,000. This is an undiscounted reconciliation, not evidence that the project meets the required return. Apply the selection methods in capital versus operating budgets only after the cash-flow checks pass.

Where it goes wrong

  • Counting study spending again. The historical study remains part of project history, but it is not a future cash difference.
  • Equating allocation with added cost. An accounting allocation requires evidence of an incremental company cash payment before inclusion.
  • Subtracting depreciation as cash. Use depreciation to calculate cash taxes, then add the noncash charge back. Keep equipment payments separate.
  • Mixing financing with project returns. In an unlevered investment case, debt proceeds and interest belong in a separate financing assessment consistent with the discount rate.
  • Ending with an unsupported release. Collection delays, disposal costs and unrecoverable inventory change terminal cash. Confirm the dates and amounts rather than automatically clearing every balance.

Check the project records in Covirage

Bring your project schedule and a sample of your own sales, cost and working capital exports to Covirage. Covirage maps the columns, and its tools compute and check the figures behind your assumptions; the external AI model explains the results with every figure traced to its rows. Create a free Covirage account and bring a sample of your own data.

See FP&A reporting with Covirage for the finance team's reporting context.

Questions people ask

Should sunk costs appear in a capital budgeting cash-flow schedule?

An unrecoverable cost already incurred is excluded from the forward investment decision because accepting or rejecting the project cannot change it. Keep it visible in the historical spending record, but do not subtract it again from future incremental project cash.

Why is depreciation added back to project cash flow?

Depreciation reduces accounting operating profit but does not itself pay cash in the forecast period. Add it back after calculating taxes. Use the appropriate tax depreciation schedule for cash taxes, which may differ from the financial reporting depreciation schedule.

Should a project schedule include loan proceeds and interest?

A project schedule discounted at the weighted average cost of capital generally measures cash before debt financing. Keep borrowing and debt service in a separate financing assessment. If the decision uses equity cash flows instead, use a consistent equity valuation framework.