Understanding the Accounting Rate of Return Method

When a company decides whether to buy new machinery, launch a product line, or expand a factory, it needs a quick way to judge whether the money will be worth spending. Discounted cash flow techniques like NPV and IRR are theoretically superior, but they need detailed cash flow forecasts and a discount rate, both of which take time and judgement to build. The Accounting Rate of Return (ARR) method takes a simpler route: it looks at accounting profit instead of cash flows, making it one of the fastest ways to get a first impression of a project’s profitability. This makes it a natural starting point for finance students before moving on to the more mathematically demanding discounted cash flow techniques.

What is the accounting rate of return method? 🔗

The Accounting Rate of Return, also called the average rate of return, measures the profitability of an investment by comparing the average annual accounting profit it generates to the money originally invested in it. Unlike the payback period, which only tells you how quickly you recover your outlay, ARR tells you how profitable the investment is likely to be over its entire useful life, expressed as a single percentage figure. It is classified as a non-discounted, or traditional, capital budgeting technique because it does not adjust future profits for the time value of money, unlike NPV or IRR.

The formula in simple terms 🔗

The basic formula is straightforward:

ARR = (Average annual accounting profit ÷ Initial investment) × 100

Some organisations prefer to use average investment instead of the initial outlay in the denominator, especially when the asset has a salvage value. In that version, average investment is usually taken as the sum of the opening and closing book values divided by two. Both approaches are acceptable as long as the method is applied consistently across the projects being compared, a point explained clearly in this accounting rate of return overview.

Average annual accounting profit itself is calculated after deducting depreciation and tax, since ARR is meant to reflect profit as it would appear in the books, not the raw cash generated by the project.

Working out ARR with a simple example 🔗

Suppose a company is considering a machine that costs ₹10,00,000, has a useful life of five years, and no salvage value at the end. The expected net profit after tax for each year is as follows:

Total profit over five years works out to ₹10,00,000, which gives an average annual profit of ₹2,00,000. Dividing this by the initial investment of ₹10,00,000 gives an ARR of 20 percent. If the company instead uses average investment, calculated as (₹10,00,000 + ₹0) ÷ 2, the denominator becomes ₹5,00,000, pushing the ARR up to 40 percent.

This gap between the two versions is exactly why it matters to state which base is being used before comparing ARR figures across projects. Once the ARR is calculated, management compares it against a pre-decided cut-off rate, sometimes called the hurdle rate or desired rate of return. A project clears the bar only if its ARR meets or exceeds this benchmark.

Reading the decision rule correctly 🔗

Suppose the company in the example above has set a minimum acceptable ARR of 25 percent for new machinery purchases. Using the initial investment base, the project’s ARR of 20 percent would fail to clear this hurdle and should, in theory, be rejected. But using the average investment base, the same project shows an ARR of 40 percent, comfortably above the cut-off. This is not a contradiction in the underlying numbers; it is a reminder that the choice of denominator changes the outcome of the decision itself. When several projects are being ranked against one another, the one with the higher ARR is usually preferred, provided the same base has been used consistently for every project in the comparison.

Why finance teams still reach for ARR 🔗

Despite its age, the accounting rate of return method has not disappeared from finance textbooks or boardrooms, and there are practical reasons for that.

Data availability: ARR relies on figures that are already sitting in the financial statements, namely projected net profit and the asset’s book value. There is no need to build a separate cash flow model or estimate a discount rate, which makes it far quicker to compute than NPV or IRR.

Familiar language: Because ARR is expressed as a percentage return on investment, it speaks the same language as return on capital employed and return on equity, ratios that operating managers already track. This makes it easy for non-finance stakeholders to interpret without additional explanation.

Useful for quick screening: ARR works well as an initial filter when a company has to shortlist several projects of similar size, risk, and duration before subjecting the survivors to more rigorous discounted cash flow analysis. It is also commonly used for smaller or lower-risk decisions where the cost of building a full DCF model would outweigh the benefit, a trade-off discussed in this capital budgeting explainer.

What ARR conveniently ignores 🔗

The simplicity of ARR comes at a cost, and understanding these gaps is just as important as knowing the formula.

Time value of money: ARR treats a rupee earned in year one exactly the same as a rupee earned in year five. In reality, money available today can be reinvested and grow, so profits that arrive earlier in a project’s life are worth more than profits that arrive later. Because ARR does not discount future profits back to their present value, it can rank two projects as equally attractive even when one delivers its returns much earlier than the other.

Cash flow timing: ARR is built on accounting profit, not cash flow. Profit figures include non-cash charges like depreciation and can be shaped by the choice of accounting policy, while actual cash inflows and outflows may occur in a completely different pattern. Two projects with identical average profits can have very different cash positions in any given year, and ARR is blind to that difference, a limitation the accounting rate of return is frequently criticised for.

No adjustment for risk or project life: ARR gives a single average figure and does not distinguish between a stable, predictable income stream and a volatile one with the same average profit. It also does not naturally account for projects of different durations, since a five-year project and a ten-year project can show the same percentage despite very different total exposure.

How Indian companies actually use ARR 🔗

Survey-based research on Indian corporate practice gives a useful reality check on how much weight ARR actually carries in the boardroom. A nationwide survey of listed Indian companies found that traditional techniques such as the payback period continue to be used alongside the discounted cash flow methods of IRR and NPV, which remain the most preferred overall, particularly among larger and younger firms with well-qualified finance teams.

ARR itself shows up as a secondary technique. In one such survey, roughly 31 percent of companies led by CEOs holding a company secretary qualification reported using ARR as part of their appraisal toolkit, generally in combination with other methods rather than on its own. This pattern matches what finance theory recommends: use ARR for a fast first look, then validate promising projects with discounted cash flow analysis before committing capital.

This layered approach also explains why Indian B.Com and finance courses continue to teach ARR even though it is rarely the sole basis for a real investment decision. Understanding its mechanics helps students appreciate exactly what discounted techniques improve upon, and why companies bother with more complex models at all, a classification of traditional versus discounted techniques covered in university-level finance course material.

Where ARR fits in the bigger picture 🔗

ARR works best as one input among several, not as the final word on whether a project should go ahead. It is particularly useful when comparing projects that are similar in risk profile and expected life, since the comparison is cleaner when the underlying assumptions about depreciation and profit recognition are consistent across the options. Comparing a two-year marketing campaign against a fifteen-year infrastructure project on ARR alone, for instance, would be misleading, because the method cannot capture how differently the returns are spread out over such different time horizons.

For anything involving a large capital outlay, a long project life, or meaningful uncertainty, ARR should be paired with the payback period for a quick liquidity check and with NPV or IRR for a full picture that accounts for the time value of money. Used this way, ARR earns its place as a fast, low-effort screening tool rather than a replacement for rigorous investment appraisal.

What do you think? If you were choosing between two projects with the same ARR but very different profit patterns over time, would you trust the percentage on its own, or insist on running the numbers through NPV first? And where else in everyday business decisions do you think a “quick and simple” metric like ARR does more harm than good by hiding the timing of returns?

References

1. https://en.wikipedia.org/wiki/Accounting_rate_of_return
2. https://corporatefinanceinstitute.com/resources/accounting/arr-accounting-rate-of-return/
3. https://www.adityabirlacapital.com/abc-of-money/capital-budgeting-explained
4. https://www.iimb.ac.in/node/3518
5. https://www.researchgate.net/publication/315944985_Capital_Budgeting_Practices_in_Indian_Companies
6. https://www.shobhituniversity.ac.in/pdf/econtent/Financial-Management-Unit-3-Dr-Ashok-Kumar.pdf