Making the strategic investment decision

Strategic investment decisions convert a direction of travel into a commitment of scarce capital. Whatever valuation method you use, keep three fundamentals in view: compare incremental future cash flows, exclude sunk costs, and recognise that cash received later is worth less than cash available today.

When to use it

• Use this approach when you must choose among strategic alternatives with different costs, benefits, timing and risks. Use payback only as a screening method when a full discounted-cash-flow analysis is disproportionate or unavailable.

Origins

Robert Frost’s image of two diverging roads is a useful metaphor for strategic choice, but the financial logic comes from capital budgeting and value-based management. Those disciplines developed methods for comparing an immediate investment with cash and other benefits expected over time. Their central ideas are incremental cash flow, the irrelevance of costs that cannot now be recovered, and the opportunity cost of capital.

What it is

The method compares mutually exclusive strategic alternatives and asks which creates the greatest value at an acceptable level of risk, while still respecting non-financial stakeholder goals.

At one end of the evaluation spectrum are sophisticated methods such as real-option valuation; at the other are shortcuts such as the immediate effect on earnings. Two practical options sit between those extremes: discounted cash flow, or DCF, and payback.

DCF forecasts the incremental free cash flows generated by each alternative and discounts them to Year 0 to calculate net present value, or NPV. Payback estimates how long it takes the resulting cash benefits to recover the original investment. Neither method removes uncertainty. Their purpose is to make assumptions visible, comparable and testable.

Three rules apply throughout. First, include only future cash flows that differ because the alternative is pursued. Second, ignore expenditure already incurred: it is sunk and cannot be changed by the decision. Third, account for timing because capital committed now could otherwise earn a return elsewhere.

How to use it

Start by defining the alternatives, decision criteria and common baseline. Model the “with” and “without” cases for each option so that only incremental effects enter the analysis. Document revenue, price, volume, cost, working-capital, capital-expenditure and timing assumptions, together with their owners and evidence.

For DCF, forecast free cash flow—operating profit plus depreciation, less changes in working capital and capex—before interest and corporation tax. Discount each period’s cash flow and sum the results. Cash in Year 0 is not discounted. In Year n, the conventional factor is 1/(1+r)n, where r is the chosen discount rate. Although a mid-year convention can be more precise, applying the same convention to every alternative is most important for comparison.

Make operating assumptions coherent with the strategic story. Distant revenue should agree with demand, market share and competitive-position assumptions; use Strategic due diligence and the market contextual plan review to challenge them. Segment margins should reflect competitive intensity and feasible performance improvement. Forecast operating margins of 40–50 per cent deserve particular scrutiny unless the economics clearly support them. Capex in, for example, Year 8 must be consistent with capacity and technology needs.

Treat the terminal value conservatively. One option is to capitalise the final forecast cash flow with no further growth and then discount that value back to Year 0. Another is to assume flat cash flows through Year 15 and none thereafter. Test whether a more conservative terminal value changes the decision.

Select a discount rate on a consistent basis. If the analysis uses the cost of equity, it may be framed as a risk-free return plus the market risk premium—historically around 4–5 per cent—multiplied by beta. A beta near 0.5 represents relatively low market sensitivity, while one near 1.5 represents higher sensitivity. This simplified treatment should not replace finance-policy guidance: depending on the cash flows and decision context, the organisation may require a weighted average cost of capital or another approved hurdle rate.

Do not hide project-specific uncertainty by arbitrarily changing the discount rate. Model uncertain cash flows explicitly with scenarios, probabilities and expected values, using Expected value and sensitivity analysis. Test the discount rate by +/– 2 per cent and identify assumptions that reverse the ranking.

If DCF is not proportionate, calculate payback. Let the investment be £I and average annual incremental benefit over the first five years be £B/year. Payback is I/B. A four-year payback may be attractive; under the stated simplifying assumptions it is comparable to a 9 per cent/year return over a five-year period with no later benefits. A durable advantage lasting ten years may justify a six- to seven-year payback, but the longer horizon also increases uncertainty. Calculate total benefits and net benefits as well. If value arrives mainly after five years, use DCF rather than relying on payback.

Then evaluate non-financial benefits, dis-benefits, implementation capacity, reversibility and risk. An option with the largest estimated return may still be unacceptable; a lower-return option may be preferable if its downside is materially smaller. Use ranges and decision gates where uncertainty cannot be resolved before commitment.

The payback approach to evaluating strategic alternatives

Lay the alternatives out in this format so that investment cost, annual cash benefit, payback, total net benefit, risk and non-financial effects can be reviewed together. The fastest payback is not necessarily the best option: it may create little total value. Conversely, the highest-return option may carry an unacceptable downside. If two attractive options are not mutually exclusive, assess whether both can be sequenced without exceeding capital or delivery capacity.

Top practical tip

Use DCF to expose the economic assumptions behind strategic alternatives, then stress-test the few assumptions that actually determine the ranking.

Top pitfall

Do not treat payback as a complete valuation. It ignores value after the cut-off and, unless supplemented, the time value of money and the shape of the downside.

Further reading

Brealey, R.A., Myers, S.C. and Allen, F. Principles of Corporate Finance.

Damodaran, A. Applied Corporate Finance.