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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
supplemental fee
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "supplemental fee" is correct and usable in written English.
It can be used when referring to an additional charge or cost that is added to a primary fee, often in contexts like services, education, or memberships. Example: "The course requires a supplemental fee for materials and resources not included in the tuition."
✓ Grammatically correct
News & Media
Academia
Science
Alternative expressions(8)
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
20 human-written examples
There is no supplemental fee, except for additional meals, when residents move into the nursing home.
News & Media
To enter an unregistered horse for the Cup races, you will have to pay a hefty supplemental fee.
News & Media
Another fallen star was Riboletta, the Brazilian mare whose owner paid a supplemental fee of $400,000 to enter her.
News & Media
In effect, the supplemental fee turns owners into bettors, except they are pushing a lot more than $2 through the windows.
News & Media
And Unshaded, who was never nominated to run in the Derby, would have to pay a supplemental fee of $150,000 to enter.
News & Media
In the second start of his winning streak, Skip Away was entered in the Breeders' Cup Classic after Hine paid $480,000 as a supplemental fee because the horse had not been nominated.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
40 human-written examples
And because of these supplemental fees -- essentially late fees -- some $2.2 million will be added to the day's $13 million in purses.
News & Media
In last year's Breeders' Cup, Carolyn Hine, Skip Away's owner, and her husband, Sonny Hine, the trainer, risked $480,000 in supplemental fees to put their horse in the Classic.
News & Media
And it was still the buzz today when the horses were entered and Gentlemen was thrust against world-class rivals like Silver Charm and Skip Away for the biggest purse in racing, which grew to $5,120,000 with supplemental fees added.
News & Media
In many cases, they end up paying thousands of dollars more — in bribes to crooked border officers or supplemental fees to smugglers — so they can keep pressing toward Australia.
News & Media
The horses will run in eight races ranging from the six-furlong Sprint to the mile-and-a-half Turf, and the purses will total $15 million, counting extra money assigned from the supplemental fees charged to horses not registered for the Breeders' Cup at birth.
News & Media
Expert writing Tips
Best practice
When using "supplemental fee", clearly state what the primary fee covers to justify the additional charge.
Common error
Avoid using "supplemental fee" without explaining its purpose. Always specify what the initial fee does not cover, making the additional charge understandable.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "supplemental fee" functions as a noun phrase, typically acting as the object of a preposition or a direct object, denoting an additional charge or cost, as evidenced by Ludwig's examples.
Frequent in
News & Media
40%
Academia
30%
Science
30%
Less common in
Formal & Business
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
The phrase "supplemental fee" is a commonly used noun phrase indicating an additional charge or cost, as validated by Ludwig. Predominantly found in news, academic, and scientific contexts, its primary function is to inform about extra expenses beyond a base price. Alternatives include "additional charge" or "extra fee", though "supplemental fee" often implies a more formal or structured additional cost. When using this phrase, ensure clarity by specifying what the primary fee covers and justifying the supplemental charge's purpose.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
additional charge
Focuses on the fact that it's an extra cost, simpler phrasing.
extra fee
Similar to "additional charge" but with a more concise expression.
surcharge
Implies an additional charge added to an existing price or cost.
additional cost
Highlights the cost aspect of the supplemental charge.
late fee
Specifically applies when the fee is due to a delay or overdue action.
ancillary fee
Describes a fee related to but not part of the main service.
premium
Highlights the superior quality of the service that involves the fee.
access fee
Specifically related to costs for entering or utilizing a service or location.
administrative fee
The fee covers administrative or organizational expenses.
service charge
A charge that is added to cover a service.
FAQs
What does "supplemental fee" mean?
A "supplemental fee" is an additional charge added to a primary fee, often covering extra services, materials, or resources.
When is it appropriate to use the term "supplemental fee"?
Use "supplemental fee" when an initial fee doesn't cover all associated costs, and an extra charge is required for additional services or features.
What are some alternatives to "supplemental fee"?
Alternatives include "additional charge", "extra fee", or "surcharge" depending on the context.
Is there a difference between a "supplemental fee" and an "extra fee"?
While similar, "supplemental fee" often implies a more structured or official additional cost compared to a general "extra fee".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested