Analysing or Analyzing: Which Spelling Is Correct?

You’re halfway through writing a report — or a tweet — and you freeze. Is it analysing or analyzing? Did you spell it wrong? Does it even matter?

Here’s the short answer: both spellings are correct. But which one you should use depends entirely on your audience, your location, and the style guide you follow. Get it wrong for your audience, and your writing can look careless even when the content is brilliant.

This guide breaks down the difference clearly, with examples, rules, and everything you need to confidently pick the right form — every single time.

Analysing

Analysing is the present participle of analyse, the standard spelling used in British English, Australian English, and most Commonwealth countries (Canada, New Zealand, South Africa, India, and others).

The scientist was analysing the water samples when the power went out.

If you’re writing for a UK publication, submitting a university dissertation in Australia, or drafting a business report for a Commonwealth audience, analysing is the correct and expected form.

Analyzing

Analyzing is the present participle of analyze, the standard spelling used in American English.

The team is analyzing customer feedback to improve the product.

If you’re writing for a US-based company, publishing on American platforms, or submitting to an American journal, analyzing is what your audience expects — and what spell-checkers set to “English (US)” will accept.

Analysing or Analyzing — Quick Answer

Examples

To make the distinction crystal clear, here are side-by-side examples:

American English (analyzing):

• She is analyzing the stock market data before making a recommendation.
• The forensic team spent hours analyzing the evidence.
• After analyzing the survey results, the team proposed three changes.

British English (analysing):

• She is analysing the stock market data before making a recommendation.
• The forensic team spent hours analysing the evidence.
• After analysing the survey results, the team proposed three changes.

Same meaning. Same pronunciation. Different spelling — based purely on location.

The Origin of Analysing / Analyzing

Both spellings share the same ancient root. The word traces back to the Greek word analusis — a compound of ana (up, throughout) and luein (to loosen) — meaning “a breaking up” or “a resolving into component parts.” The core idea has always been the same: to examine something by taking it apart.

From Greek, the word passed into Latin and then into French, where it became analyser, spelled with an “s.” English borrowed this French form in the early 17th century, which is why analyse was the original standard spelling across all English-speaking regions.

The split between analyse and analyze came much later — in the 19th century — and it was almost entirely the work of one man.

British English vs American English Spelling

In the early 1800s, an American lexicographer named Noah Webster set out to reform and simplify English spelling for the newly independent United States. His goal was partly linguistic — to make spelling more logical and phonetic — and partly cultural: to distinguish American English from British English as a mark of national identity.

Webster’s 1828 dictionary, An American Dictionary of the English Language, introduced dozens of spelling changes that are still standard in American English today: colour became color, centre became center, defence became defense — and analyse became analyze.

The pattern stuck. American English shifted strongly toward -ize endings for verbs in this class, while British English retained the -ise/-yse forms it had inherited from French and Greek origins.

Key Rule:

• American English → -ize / -yze endings: analyze, organize, realize, crystallize, catalyze
• British English → -ise / -yse endings: analyse, organise, realise, crystallise, catalyse

One handy memory trick: “British” contains the letter S — and so does “analyse.”

The noun form — analysis — never changes. Whether you write analyzing or analysing, the noun is always spelled analysis in both varieties of English.

Comparison Table

Which Spelling Should You Use?

The correct choice depends on three factors: where you are, who you’re writing for, and which style guide applies.

Simple Rule:

• Writing for a US audience or employer? → Use analyzing
• Writing for a UK, Australian, or Commonwealth audience? → Use analysing
• Writing for an international audience with no regional preference? → Choose one form and stay consistent throughout the entire document

Both forms are accepted by major grammar and style guides when used appropriately. The only error is mixing them within the same piece of writing — that signals carelessness, not creativity.

A quick practical tip: before you start writing, set your word processor’s language to either “English (United States)” or “English (United Kingdom).” Your spell-checker will then flag inconsistencies automatically and save you the effort of manually tracking which form you’ve used.

Common Mistakes with Analysing / Analyzing

Even experienced writers trip over these. Here are the most frequent errors and how to avoid them:

1. Mixing spellings in the same document

This is the most common mistake — and the one most likely to damage your credibility.

• ❌ The researchers will analyze the data. After analysing the results, they found…
• ✅ (US) The researchers will analyze the data. After analyzing the results, they found…
• ✅ (UK) The researchers will analyse the data. After analysing the results, they found…

2. Writing “analyzis” as the noun

The noun form does not follow the verb spelling. It is always analysis, regardless of whether you use the American or British verb form.

• ❌ The analyzis showed significant trends.
• ✅ The analysis showed significant trends.

3. Assuming one spelling is simply “wrong”

Neither form is incorrect — they are regionally appropriate. Labelling British analysing as a spelling error (or vice versa) is a mistake made by those unfamiliar with the British/American spelling divide.

4. Forgetting to check journal or employer style guides

Many academic journals, publishers, and large companies have official style guides. Always check before you submit. An American journal will expect analyzing; a British one will expect analysing.

Analysing / Analyzing in Everyday Examples

Here’s how each form appears naturally across different writing contexts:

1. Emails

• US: “I’m currently analyzing the Q3 results and will share my findings by Friday.”
• UK: “I’m currently analysing the Q3 results and will share my findings by Friday.”

2. News Writing

• US (AP Style): “Investigators are analyzing footage from the scene.”
• UK (Guardian Style): “Investigators are analysing footage from the scene.”

3. Social Media

• US user: “Just spent the morning analyzing my Google Analytics data — the numbers don’t lie 📊”
• UK user: “Just spent the morning analysing my Google Analytics data — the numbers don’t lie 📊”

4. Academic Writing

• US dissertation: “This study involved analyzing responses from 500 participants.”
• UK dissertation: “This study involved analysing responses from 500 participants.”

5. Business Reports

• US: “Our team has been analyzing customer churn rates across all product lines.”
• UK: “Our team has been analysing customer churn rates across all product lines.”

Analysing / Analyzing — Google Trends & Usage Data

When comparing analyzing versus analysing in global search data, a consistent regional pattern emerges. Searches from the United States, Canada (which uses a mix), and global tech platforms heavily skew toward analyzing. Searches from the United Kingdom, Australia, and South Asian English speakers tend to favour analysing.

Looking at written corpus data — such as the Google Ngram Viewer, which tracks word frequency in published books — analyzing dramatically outpaces analysing in overall global volume, primarily because American English dominates the volume of English-language publishing worldwide. However, within British and Commonwealth publications specifically, analysing remains the clear standard.

Usage Insight:

• In American academic databases (JSTOR, PubMed for US journals): analyzing is dominant
• In British academic publishing (British Medical Journal, Oxford journals): analysing is standard
• In global tech and business content (often defaulting to American English): analyzing is more common
• In international news wire services (Reuters, BBC): regional editions use their respective forms

The takeaway is not that one form is more popular overall — it’s that popularity depends entirely on geography. Knowing your audience tells you which form will look natural and professional.

Frequently Asked Questions

Is “analysing” wrong in American English? Yes — American spell-checkers will flag it as an error. Use analyzing for US audiences.

Is “analyzing” wrong in British English? Technically it is non-standard, though widely understood. For formal British writing, always use analysing.

Does the pronunciation change? No. Both spellings are pronounced exactly the same: an-AL-ih-zing.

What about the noun form — “analysis” or “analyzis”? Always analysis. The noun never changes regardless of regional spelling preference.

Which spelling does Google prefer for SEO? Neither. Google indexes both forms. Target the spelling your audience naturally uses — US audiences search analyzing, UK audiences search analysing.

Does Australian English use “analysing” or “analyzing”? Australian English follows British conventions, so analysing is standard.

Which spelling should I use in a CV or résumé? Match the spelling to the country where you’re applying for the job.

Can I use “analyse” and “analyze” in the same document? No — consistency is essential. Pick one form and use it throughout.

Conclusion

The analysing vs analyzing debate has a clean, clear answer: both are correct, and neither is superior. The difference is purely a matter of regional English conventions. American English uses analyzing with a Z; British and Commonwealth English uses analysing with an S.

The golden rule is simple: know your audience and stay consistent. Set your word processor’s language before you start writing, follow the relevant style guide, and never mix the two forms within a single document.

Understanding small distinctions like this one is what separates competent writing from truly polished, professional writing. Now that you know the difference, you’ll never second-guess yourself again.