In-House: Spelling and Hyphenation
Merriam-Webster gives “in-house” as the headword for both adjective and adverb uses referring to work done within an organization rather than by outsiders. For that established expression, the hyphenated form is the dependable dictionary spelling.
Use “in-house” for the established adjective or adverb meaning within an organization, as in “in-house counsel” or “developed in-house.”
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| adjective before a noun | in-house + noun | Use the established hyphenated form. |
| adverb meaning within the organization | verb + in-house | The established adverb is also commonly hyphenated. |
| literal phrase meaning inside a particular house | in house | Do not confuse the organizational term with the literal prepositional phrase. |
Quick tests
Meaning / construction test
Does “in-house” mean done, employed, or provided within the organization?
If yes: Use “in-house.”
If no: If “in” is simply a preposition and “house” is its literal object, write the words separately.
Caveat: This guide concerns the established organizational expression “in-house,” not every occurrence of the separate words “in” and “house.”
Examples
The company hired an in-house designer.
The compound modifies “designer.”
We handle payroll in-house.
The established organizational adverb remains hyphenated.
The guests stayed in the house.
This is the literal prepositional phrase, not the organizational compound.
Further guidance
Adjective Use
Use the hyphen in attributive uses such as “in-house team,” “in-house counsel,” and “in-house training.”
Adverb Use
The dictionary also records the hyphenated form when it functions adverbially, as in work handled in-house.
Boundary
This guide is about the established lexical expression “in-house,” not every sentence in which the separate preposition “in” happens to precede the noun “house.”
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- In-house — Definition & Meaning (opens in a new tab)Merriam-Webster · Dictionary headword and adjective/adverb treatment of “in-house”