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Financial Management and Strategic Management · Financing Decisions - Leverages

Operating Leverage and Degree of Operating Leverage (DOL)

Updated 4 October 2026 · Fact-checked

Operating leverage is the effect of fixed operating costs on EBIT. Because fixed costs do not change with sales, a small change in sales causes a larger change in EBIT. Degree of Operating Leverage = Contribution ÷ EBIT = % change in EBIT ÷ % change in sales. Compute contribution first, then EBIT, then divide.

Understand Operating Leverage and Degree of Operating Leverage

Every business has two kinds of operating cost. Variable costs move with sales. Fixed operating costs (rent, salaries, depreciation) stay the same within the relevant range, whatever the sales.

This creates operating leverage. When sales rise, variable costs rise in proportion, but fixed costs do not. So each extra rupee of contribution goes straight to EBIT. EBIT therefore rises by a larger percentage than sales. The same works in reverse: when sales fall, EBIT falls faster.

The Degree of Operating Leverage (DOL) measures this. A DOL of 4 means a 1% change in sales changes EBIT by 4%, in the same direction. The higher the fixed costs relative to contribution, the higher the DOL.

DOL is not constant. It is measured at a given level of sales. It is highest close to the break-even point, where EBIT is tiny, and it falls as sales move further above break-even. At break-even, EBIT is zero, so DOL is undefined. If there are no fixed operating costs, DOL is 1.

Higher DOL means higher operating risk: your EBIT is more sensitive to sales swings. This is why DOL is read together with break-even analysis and financial leverage.

Key rules to remember

Contribution
Contribution = Sales − Variable cost = Sales × P/V ratio
Variable cost here means all variable operating costs, not interest.
EBIT
EBIT = Contribution − Fixed operating costs
Fixed operating costs exclude interest. Interest is a financing cost and sits below EBIT.
Degree of Operating Leverage
DOL = Contribution ÷ EBIT
Computed at one sales level. Valid only when EBIT is not zero.
DOL from percentage changes
DOL = % change in EBIT ÷ % change in sales
Use this when two sets of figures are given. Take the change over the base (starting) figure.
Forecasting EBIT
% change in EBIT = DOL × % change in sales
Works for sales changes within the range where fixed costs stay constant.
DOL and fixed cost
DOL = 1 + (Fixed operating costs ÷ EBIT)
Follows from Contribution = EBIT + Fixed cost. Shows DOL is 1 when fixed cost is nil.

How to solve Operating Leverage and Degree of Operating Leverage questions

Use this order for any DOL question. It avoids missing items hidden in the data.

  1. 1List the data: sales (or units × price), variable cost per unit or total, fixed costs, and interest if given.
  2. 2Compute contribution = Sales − Variable cost. Use total figures, or per-unit figures multiplied by units.
  3. 3Identify fixed operating costs only. Leave out interest and preference dividend, as they do not belong to operating leverage.
  4. 4Compute EBIT = Contribution − Fixed operating costs.
  5. 5Compute DOL = Contribution ÷ EBIT. Show the working in a line so you earn step marks.
  6. 6If asked for the effect of a sales change, find % change in EBIT = DOL × % change in sales, then the new EBIT if required.
  7. 7State the interpretation in one sentence, for example: a 1% change in sales changes EBIT by DOL %.
  8. 8 If the question gives two years, verify using % change in EBIT ÷ % change in sales.

Quickest way: Contribution-over-EBIT shortcut for MCQs and written answers

When to use it: Use it in MCQs and in the first two lines of any written DOL answer, when time is short.

  1. Write Contribution and EBIT in two lines. Everything else is noise.
  2. If EBIT and fixed cost are given, use DOL = 1 + Fixed cost ÷ EBIT. It saves finding contribution.
  3. For a forecast, multiply: new EBIT = old EBIT × (1 + DOL × % change in sales).
  4. In MCQs, check your answer. If EBIT is positive and fixed costs exist, DOL must be above 1. A value below 1 then signals a mistake.
  5. In written answers, use this layout: Sales, less variable cost, Contribution, less fixed cost, EBIT, then DOL. Each line can earn a step mark, and the final interpretation line earns the last mark.

Common mistakes in Operating Leverage and Degree of Operating Leverage

  • Using EBIT ÷ Contribution instead of Contribution ÷ EBIT.

    Students mix up numerator and denominator when recalling the formula.

    Fix: When EBIT is positive and contribution exceeds EBIT, DOL is 1 or more, so contribution (the larger figure) goes on top.

  • Deducting interest before computing DOL.

    Students confuse EBIT with EBT, or mix operating and financial leverage.

    Fix: Stop at EBIT. Interest matters only for financial leverage (DFL) and combined leverage.

  • Including fixed costs in variable cost, or vice versa, when finding contribution.

    The question lists costs in a jumbled order and students skim it.

    Fix: Tag each cost as V or F before calculating. Contribution subtracts only variable costs.

  • Treating DOL as a fixed number for the business.

    Students learn one worked example and assume DOL never changes.

    Fix: DOL depends on the sales level. Recompute it if sales change, and note it falls as sales move above break-even.

  • Calculating percentage change over the new figure instead of the base.

    Students divide the change by the later year's value.

    Fix: Always divide the change by the starting figure.

  • Calculating DOL at break-even.

    Students apply the formula without checking EBIT.

    Fix: At break-even EBIT is zero, so DOL is undefined. Say so if the question reaches that point.

Worked examples

Example 1

A firm sells 20,000 units at ₹50 per unit. Variable cost is ₹30 per unit and fixed operating costs are ₹2,00,000. Interest on debt is ₹50,000. Calculate the Degree of Operating Leverage. If sales increase by 10%, find the new EBIT.

Show the solution
  1. Sales = 20,000 × ₹50 = ₹10,00,000.
  2. Variable cost = 20,000 × ₹30 = ₹6,00,000.
  3. Contribution = ₹10,00,000 − ₹6,00,000 = ₹4,00,000.
  4. EBIT = ₹4,00,000 − ₹2,00,000 = ₹2,00,000. Interest of ₹50,000 is ignored for DOL.
  5. DOL = ₹4,00,000 ÷ ₹2,00,000 = 2.
  6. % change in EBIT = 2 × 10% = 20%.
  7. New EBIT = ₹2,00,000 × 1.20 = ₹2,40,000.
  8. Check: sales become ₹11,00,000, contribution ₹4,40,000, EBIT ₹4,40,000 − ₹2,00,000 = ₹2,40,000. It matches.

Answer: DOL = 2. A 10% rise in sales raises EBIT by 20% to ₹2,40,000.

Example 2

Company A has sales of ₹8,00,000, variable cost of ₹5,00,000 and fixed operating costs of ₹1,50,000. Company B has the same sales and contribution, but fixed operating costs of ₹2,40,000. Calculate DOL for each and say which has higher operating risk.

Show the solution
  1. Contribution for both = ₹8,00,000 − ₹5,00,000 = ₹3,00,000.
  2. Company A: EBIT = ₹3,00,000 − ₹1,50,000 = ₹1,50,000.
  3. DOL of A = ₹3,00,000 ÷ ₹1,50,000 = 2.
  4. Company B: EBIT = ₹3,00,000 − ₹2,40,000 = ₹60,000.
  5. DOL of B = ₹3,00,000 ÷ ₹60,000 = 5.
  6. Check with the other formula for B: 1 + ₹2,40,000 ÷ ₹60,000 = 1 + 4 = 5.
  7. Interpretation: a 1% change in sales changes EBIT by 2% in A and by 5% in B.

Answer: DOL of A = 2 and DOL of B = 5. Company B has higher fixed costs, a higher DOL and so higher operating risk.

Exam tips

  • Read the question for the word 'operating'. Ignore interest and tax when you compute DOL.
  • Show contribution and EBIT as separate lines. Many marks go to these steps even if the final DOL slips.
  • Add one line of interpretation. ICAI-style answers often reward it.
  • In MCQs, test an option by checking whether it is at least 1 and fits Contribution ÷ EBIT. This removes wrong options quickly.
  • Expect DOL to appear alongside DFL and DCL in one question. Compute DOL first, as it feeds the combined leverage figure.

Practice questions from Financing Decisions - Leverages

Operating Leverage and Degree of Operating Leverage in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Operating Leverage and Degree of Operating Leverage: frequently asked questions

What is the DOL formula in CA Intermediate?

DOL = Contribution ÷ EBIT. It also equals % change in EBIT ÷ % change in sales. Use whichever matches the data given.

Can DOL be less than 1?

With positive EBIT and some fixed operating costs, DOL is greater than 1. With no fixed operating costs it equals 1. A value below 1 usually signals a calculation error.

Why is DOL highest near break-even?

Near break-even, EBIT is very small while contribution is much larger. Dividing by a small EBIT gives a large DOL. At break-even exactly, EBIT is zero and DOL is undefined.

Does interest affect operating leverage?

No. Interest is a financing cost that comes after EBIT. It affects financial leverage, not operating leverage.