What is Margin of Safety?
Margin of safety measures how far actual or budgeted sales exceed the break-even point. It tells a business how much sales can fall before it starts losing money.
Margin of Safety = Actual (or Budgeted) Sales − Break-even Sales. As a ratio, it shows the percentage sales can drop before a company hits a loss.
- •Large cushion above break-even
- •Low risk of a loss from a sales dip
- •Common in stable, mature businesses
- •More flexibility to absorb cost increases
- •Sales sit close to break-even
- •Small sales drop can cause a loss
- •Common in new or highly seasonal businesses
- •Little room for pricing or cost mistakes
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Step-by-step worked examples
A company has actual sales of $100,000 and a break-even point of $70,000. Find the margin of safety and its ratio.
MOS = 100,000 − 70,000 = $30,000 MOS Ratio = 30,000 / 100,000 = 0.30 = 30%
A firm budgets sales of $250,000 against a break-even of $200,000. What is its margin of safety ratio?
MOS = 250,000 − 200,000 = $50,000 MOS Ratio = 50,000 / 250,000 = 0.20 = 20%
Break-even is 500 units, the company sells 650 units at $50 each. Find the margin of safety in dollars and as a ratio.
MOS units = 650 − 500 = 150 units MOS $ = 150 × $50 = $7,500 Actual sales = 650 × $50 = $32,500 MOS Ratio = 7,500 / 32,500 ≈ 23.08%
Flashcards
Quick quiz
Q1.Actual sales are $200,000 and break-even sales are $150,000. What is the margin of safety in dollars?
Q2.Using the same numbers, what is the margin of safety ratio?
Q3.A higher margin of safety generally means…
Q4.If actual sales equal break-even sales, the margin of safety is…
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Common mistakes
Computing the ratio by dividing MOS by break-even sales instead of actual sales. — Correct: MOS Ratio = MOS ÷ Actual Sales, not break-even sales.
Assuming margin of safety is the same as contribution margin. — Correct: Margin of safety is a sales-volume cushion above break-even; contribution margin is price minus variable cost per unit.
Ignoring that MOS can be expressed in both dollars and units. — Correct: You can compute MOS in units (actual − break-even units) or in dollars — both are valid depending on the context.
Treating a small margin of safety as automatically bad. — Correct: Context matters — a stable, low-cost business can operate safely with a smaller cushion than a volatile one.
FAQ
What is margin of safety in accounting?
It is the amount by which actual or budgeted sales exceed the break-even point, showing how much sales can drop before a loss occurs.
What is the margin of safety formula?
MOS = Actual Sales − Break-even Sales. As a ratio: MOS Ratio = MOS ÷ Actual Sales.
How do you calculate margin of safety in units?
MOS units = Actual units sold − Break-even units. Multiply by the selling price to get MOS in dollars.
What are examples of margin of safety in business?
Comparing a retailer's current sales to its break-even sales before the holiday season, or checking how much a factory's output can fall before it stops covering costs.