margin of safety: meaning, definition, pronunciation and examples
C1Formal, Technical
Quick answer
What does “margin of safety” mean?
A buffer or extra amount included in planning or design to reduce the risk of failure, error, or loss.
Audio
Pronunciation
Definition
Meaning and Definition
A buffer or extra amount included in planning or design to reduce the risk of failure, error, or loss.
1. In engineering: the degree of excess capacity or strength built into a system beyond expected loads. 2. In finance/investing (value investing): the difference between a security's intrinsic value and its market price, or a principle of risk-averse investing. 3. In general decision-making: a deliberate allowance for error or unforeseen circumstances.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or use. Spelling conventions follow standard UK/US patterns for surrounding text (e.g., 'analyse' vs. 'analyze'). The phrase itself is identical.
Connotations
Equally connotes prudence, caution, and professional risk management in both variants.
Frequency
Equally common in technical, financial, and engineering discourse in both regions.
Grammar
How to Use “margin of safety” in a Sentence
[Verb] + a/the margin of safety (e.g., calculate, maintain, provide)[Adjective] + margin of safety (e.g., narrow, adequate, comfortable)margin of safety + [Preposition] + [Noun] (e.g., margin of safety in the design, margin of safety for error)Vocabulary
Collocations
Examples
Examples of “margin of safety” in a Sentence
verb
British English
- N/A – the phrase is not a verb.
American English
- N/A – the phrase is not a verb.
adverb
British English
- N/A – the phrase is not an adverb.
American English
- N/A – the phrase is not an adverb.
adjective
British English
- N/A – the phrase is not an adjective. 'Safety-margin' can be used attributively in compounds (e.g., safety-margin analysis).
American English
- N/A – the phrase is not an adjective. 'Safety-margin' can be used attributively in compounds (e.g., safety-margin analysis).
Usage
Meaning in Context
Business
Refers to extra capital, inventory, or time built into plans to withstand downturns or unexpected costs.
Academic
Used in engineering, economics, and risk management literature to denote quantitative buffers.
Everyday
Can describe leaving extra time for a journey or having spare supplies.
Technical
A calculable ratio (e.g., in structural engineering: maximum strength / expected load).
Vocabulary
Synonyms of “margin of safety”
Strong
Neutral
Watch out
Common Mistakes When Using “margin of safety”
- Using 'margin for safety' (less common; 'of' is standard).
- Using it as a verb (e.g., 'We need to margin of safety the project' – incorrect).
- Confusing with 'profit margin'.
- Omitting the article: 'We need margin of safety' (usually requires 'a' or 'the').
FAQ
Frequently Asked Questions
Yes, they are interchangeable, though 'margin of safety' is slightly more common in formal and financial contexts, while 'safety margin' is frequent in engineering and operations.
Yes, though it retains a formal tone. In casual speech, people might say 'cushion', 'buffer', or 'leeway' instead (e.g., 'I built in a buffer for traffic').
Benjamin Graham, the father of value investing, established 'Margin of Safety' as a central principle in his 1934 book 'Security Analysis' and later in 'The Intelligent Investor'.
It is a singular, countable noun phrase. You can have 'a margin of safety' or 'the margin of safety'. The plural is 'margins of safety' (e.g., 'different projects require different margins of safety').
A buffer or extra amount included in planning or design to reduce the risk of failure, error, or loss.
Margin of safety is usually formal, technical in register.
Margin of safety: in British English it is pronounced /ˈmɑːdʒɪn əv ˈseɪfti/, and in American English it is pronounced /ˈmɑːrdʒɪn əv ˈseɪfti/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “To err on the side of caution (conceptually related)”
Learning
Memory Aids
Mnemonic
Imagine a 'margin' (like the blank edge of a page) where you can write notes safely without affecting the main text. This 'margin' is your zone of safety.
Conceptual Metaphor
SAFETY IS A PHYSICAL BUFFER/SPACE; RISK IS PROXIMITY TO A DANGEROUS EDGE.
Practice
Quiz
In which context is 'margin of safety' LEAST likely to be used?