Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
extra income
Grammar usage guide and real-world examplesUSAGE SUMMARY
"extra income" is correct and usable in written English.
You can use it when speaking or writing about money that is earned in addition to a person's primary or regular source of income. For example: "She was able to save for a car by supplementing her salary with extra income from freelance assignments."
✓ Grammatically correct
News & Media
Science
Formal & Business
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
I need the extra income.
News & Media
So extra income is what counts.
News & Media
Ms. Brett cleaned apartments for extra income.
News & Media
Her family needs the extra income.
News & Media
They earn extra income while they sleep.
News & Media
This provides source of extra income for its host community.
For extra income, they "flipped" houses near the college campus.
News & Media
Tax-dodging tycoons could furnish some extra income too.
News & Media
But yes, I receive extra income for it".
News & Media
But he has managed to earn some extra income.
News & Media
Biomass energy also generates extra income for Indian farmers.
News & Media
Expert writing Tips
Best practice
When discussing "extra income", be specific about its source and purpose to provide clarity and context for your audience.
Common error
Avoid using "extra income" when you actually mean "disposable income". "Extra income" refers to additional earnings, while disposable income is what remains after taxes and necessary expenses.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "extra income" functions as a noun phrase, typically serving as the object of a verb or the subject of a sentence. It identifies money received in addition to a regular salary or primary source of funds. Ludwig AI affirms its grammatical correctness and widespread use.
Frequent in
News & Media
50%
Science
25%
Formal & Business
15%
Less common in
Wiki
5%
Academia
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "extra income" is a grammatically sound and commonly used term to describe earnings beyond one's primary source of income. Ludwig AI validates its correctness and usability across a range of contexts. While it is generally neutral in register, its specific meaning can vary depending on the source and purpose of the income. As illustrated by Ludwig's examples, the term appears frequently in news, scientific, and formal business contexts. When using "extra income", it's important to consider the specific source and intention behind the earnings, differentiating it from related concepts like "disposable income" or "passive income".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
additional income
A straightforward synonym emphasizing the added aspect of the income.
extra earnings
A direct substitution of "income" with "earnings".
supplemental earnings
Focuses on the idea of adding to existing earnings.
supplementary income
A more formal version of "supplemental earnings".
secondary income
Similar to 'side income', but perhaps implying more structure or formality.
side income
Highlights that the income is earned from a secondary source.
top-up income
Common in British English, implying a way to increase existing funds.
spare income
Indicates income that is available beyond essential expenses.
passive income
Specifies that the income is earned with minimal effort.
windfall income
Suggests an unexpected or sudden increase in income.
FAQs
How can I use "extra income" in a sentence?
You can use "extra income" to describe earnings beyond your primary job, such as "She uses her "extra income" from freelancing to pay off her student loans".
What are some alternatives to saying "extra income"?
Alternatives include "supplemental earnings", "additional income", or "side income", depending on the context and source of the income.
Is it correct to say "an extra income" or just "extra income"?
"Extra income" is generally used as a non-count noun, so it's usually just "extra income". You wouldn't typically say "an extra income".
What's the difference between "extra income" and "passive income"?
"Extra income" simply refers to any additional earnings. "Passive income" specifically describes earnings derived from an activity that requires minimal effort to maintain, such as rental properties or investments.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested