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
contracted on
Grammar usage guide and real-world examplesUSAGE SUMMARY
"contracted on" is correct and usable in written English.
You can use it when referring to the agreement of two parties to form a contract. For example, "The company and their supplier contracted on a deal to buy the raw materials."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Wiki
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
47 human-written examples
The C H bond length in the T-shaped dimer is contracted on complex formation.
Science
37 Table 2 shows that all C H bond lengths in the T-shaped complexes are systematically contracted on complex formation.
Science
By analyzing the geometries, vibrational frequencies, natural bond orbitals, and binding energies, we conclude with the following remarks: The C H bond length in the T-shaped dimer is contracted on complex formation.
Science
The following equivalent mesh-size function is contracted on a patch if at least one element domain of the patch is refined.
His first wife died of typhoid fever contracted on their Cuban honeymoon.
News & Media
But a cold he had contracted on inauguration day developed into pneumonia, and he died just a month later.
Encyclopedias
Human-verified similar examples from authoritative sources
Similar Expressions
12 human-written examples
Each LCT consists of 5 7 permanent members, most of whom are from the correctional agency (prison or jail; see Table 1) or the agency's contracted on-site medical provider.
Science
This inefficiency arises because contracting on public information prevents risk sharing.
Science
"This year, he went to contract on the unit for $133,000".
News & Media
Olga contracted pleurisy on top of it.
Wiki
The musicians ratified the one-year contract on Monday.
News & Media
Expert writing Tips
Best practice
Use "contracted on" when you want to emphasize that an agreement was formally established or a service was officially engaged.
Common error
Be careful not to confuse "contracted on" with similar-sounding phrases like "contacted on." "Contracted on" implies a formal agreement, whereas "contacted on" simply means someone was reached or communicated with.
Source & Trust
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "contracted on" functions as a prepositional phrase, often used in passive constructions to indicate that an agreement or service engagement has been formally established. Ludwig confirms the usability of this phrase in written English.
Frequent in
News & Media
33%
Science
33%
Wiki
17%
Less common in
Encyclopedias
17%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, the phrase "contracted on" is a grammatically sound prepositional phrase that signifies a formal agreement or service engagement. According to Ludwig, the phrase is usable in written English and the examples illustrate its application across various contexts like news, science and encyclopedias. While not exceedingly common, it's readily understood. When using this phrase, ensure clarity and avoid confusion with similar phrases like "contacted on". The semantic alternatives include "agreed upon", "entered into", and "formalized on". These alternatives offer subtle variations in meaning, allowing for precise expression in different situations.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
agreed upon
Emphasizes the mutual agreement aspect of a contract, removing the action of contracting.
entered into
Focuses on the action of starting a contractual agreement, rather than the specific details.
finalized on
Highlights the completion or conclusion of the contracting process on a specific matter.
settled on
Implies that the contract was decided and accepted, potentially after some negotiation.
signed on
Emphasizes the act of signing the contract, symbolizing agreement and commitment.
ratified on
Highlights the formal approval and validation of the contract, often by a governing body.
formalized on
Focuses on the process of making the agreement official and legally binding.
stipulated in
Highlights the specific terms and conditions that were agreed upon within the contract.
undertaken in
Shifts the focus to the responsibilities and obligations assumed as part of the contractual agreement.
arranged on
Suggests that the contract involved careful planning and coordination between the parties.
FAQs
How is "contracted on" used in a sentence?
The phrase "contracted on" indicates that a formal agreement or contract was established or that someone was engaged for a service. For example, "The project was "contracted on" a fixed-price basis".
What are some alternatives to "contracted on"?
Depending on the context, you can use alternatives such as "agreed upon", "entered into", or "formalized on" to convey a similar meaning.
What's the difference between "contracted on" and "contacted on"?
"Contracted on" implies a formal agreement or a service engagement, while "contacted on" simply means someone was reached or communicated with. The context determines the correct usage.
Is it correct to say "The work was contracted on"?
Yes, it is correct. Saying "The work was "contracted on"" implies that a specific agreement was made for that work to be performed.
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
78%
Authority and reliability
4.5/5
Expert rating
Real-world application tested