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
per date
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "per date" is correct and can be used in written English.
It means "for each date" or "by date" and is often used in a financial or numerical context to indicate a rate or cost for a specific date or time period. Example: The rent for the apartment is $100 per date, meaning you will owe $100 for each day that you stay in the apartment.
✓ Grammatically correct
Science
News & Media
Alternative expressions(6)
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
15 human-written examples
Figure 2 Distribution of studies per date of publication.
None of the membranes can, as per date, fulfil all the requirements for being commercially attractive.
Users pay $25 for the initial matchmaker meeting and $20 per date.
News & Media
This dataset contained n = 288 data points (48 sowing dates × 3 replicates per date × 2 EGMS lines).
Science
Assessed from the soil at 0 to 15 cm below and around 10 plants in 4 untreated control plots in each field per date.
Both lines were sown in 2013 and 2014 at a 15 days interval (two dates per month), with 3 replicates per date, to study phenology and sterility.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
45 human-written examples
The app is available for free for now, although the plan is to monetize either through subscriptions or a per-date model.
News & Media
At each site, 2 l water sample was taken (two replicates per site per sampling date) and were analyzed for physicochemical parameters during the sampling period.
These characteristics were age (per five years), sex, rural or urban residence, income fifth, and year of index date (per year).
Science
All reactions were run in triplicate and for two different vials per sampling date 6 qPCR reactions per sampling date.
Science
Another option would be for Facebook to extend to all chats the per message expiration date option from its encrypted Secret messages feature.
News & Media
Expert writing Tips
Best practice
When using "per date" in financial contexts, clearly define what the rate covers to avoid ambiguity.
Common error
Avoid using "per date" when you actually mean "overall" or "in total" for a range of dates. "Per date" indicates a specific value for each date, not a cumulative amount.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "per date" functions primarily as an adverbial phrase, modifying a verb or noun to specify the frequency, rate, or cost associated with each individual date. Ludwig provides examples where it quantifies events, measurements, or financial values.
Frequent in
Science
70%
News & Media
20%
Formal & Business
10%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "per date" is a grammatically sound and useful phrase for specifying rates, costs, or measurements that apply individually to each date. Ludwig's analysis indicates that it is most commonly used in scientific and formal contexts to ensure clarity and precision. While not as frequent as other similar expressions, understanding its correct usage can enhance the accuracy of your writing. As Ludwig AI confirms, the phrase is perfectly acceptable in written English and serves to provide a specific, date-oriented quantification.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
for each date
Emphasizes individual dates rather than a collective period.
for every date
Similar to 'for each date' but can imply a slightly broader scope.
on a per-date basis
More formal and emphasizes the calculation or evaluation process.
by date
Focuses on dates as a reference for something being measured or organized.
daily rate
Specifically implies a cost or rate that applies to each day.
per diem
More commonly used in the context of travel expenses, meaning 'for each day'.
each day
Simple and direct way to indicate something happens every day.
for one day
Focuses on what occurs or is applicable for a single day.
date-specific
Indicates something is tailored to or dependent on a specific date.
per specified date
Highlights that the date has been explicitly mentioned.
FAQs
How can I use "per date" in a sentence?
You can use "per date" to specify a cost or measurement that applies individually to each date. For example, "The hotel room costs $150 per date" indicates the price for each day of the stay.
What's a common synonym for "per date"?
A common synonym for "per date" in financial contexts is "daily rate", especially when referring to costs or expenses.
Is it correct to say "per each date"?
While understandable, "per each date" is redundant. The term "per" already implies "each", so using just "per date" is more concise and grammatically sound.
When is it better to use "on a per-date basis" instead of "per date"?
Using "on a per-date basis" is appropriate when you want to emphasize the method of calculation or the systematic application of something for each date. It's a more formal phrasing.
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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested