A. Conversion of Gross Cash Flows to After-Tax Cash Flows
To analyze tax effects, cash flows are usually broken into three categories:
1. The initial cash outflows needed to acquire the assets of the project
2. The cash flows produced over the life of the project (operating cash flows)
3. The cash flows from the final disposal of the project
Cash outflows and cash inflows adjusted for tax effects are called net cash outflows and inflows. Net cash
flows provide provisions for revenues, operating expenses, depreciation, and relevant tax implications.
Net cash flows are the proper inputs for capital investment decisions.
The net cash outflow in Year 0 (the initial out-of-pocket outlay) is simply the difference between the
initial cost of the project and any cash inflows directly associated with it. The gross cost of the project
includes such things as the cost of land, the cost of equipment, taxes on gains from the sale of assets, and
increases in working capital. Cash inflows occurring at the time of acquisition include tax savings from
the sale of assets, cash from the sale of assets, and other tax benefits such as tax credits.
Under current tax law, all costs relating to the acquisition of assets other than land must be capitalized and
written off over the useful life of the assets. (The write-off is achieved through depreciation.)
Depreciation is deducted from revenues in computing taxable income during each year of the asset’s life;
however, at the point of acquisition, no depreciation expense is computed.
Gains on the sale of assets produce additional taxes and, accordingly, reduce the cash proceeds received
from the sale of old assets. Losses, on the other hand, are noncash expenses that reduce taxable income,
producing tax savings.
In addition to determining the initial out-of-pocket outlay, managers must also estimate the annual after-
tax operating cash flows expected over the life of the project. If the project generates revenue, the
principal source of cash flows is from operations. Operating cash flows can be assessed from the project’s
income statement. The annual after-tax cash flows are the sum of the project’s after-tax profits and its
noncash expenses. In terms of a simple formula, this computation can be represented as follows:
After-tax cash flow = After-tax net income + Noncash expenses
CF = NI + NC
The most prominent examples of noncash expenses are depreciation and losses.
The income approach to determine operating cash flows can be decomposed to assess the after-tax, cash
flow effects of each individual item on the income statement. The decomposition approach calculates the
operating cash flows by computing the after-tax cash flows for each item of the income statement as
follows:
CF = [(1 – Tax rate) × Revenues] – [(1 – Tax rate) × Cash expenses] + (Tax rate × Noncash expenses)
Because cash expenses can be deducted from revenues to arrive at taxable income, the effect is to shield
revenues from taxation. The consequence of this shielding is to save taxes and to reduce the actual cash
outflow associated with a given expenditure. Noncash expenses, such as depreciation, also shield
revenues from taxation and thus create a tax savings. Cornerstone 19.6 (p. 998) illustrates the use of the
income and decomposition approaches for calculating after-tax cash flows.