What is the correct word for an extra cost from a customer perspective? The opposite of discount [closed]

Solution 1:

The words that immediately come to mind are "surcharge" and "fee". Consider the following:

Basic cable service provides 50 standard channels for a set price of $30 a month. As for the premium channels, you may order them for an additional surcharge of $20.

...or the following:

Standard repair service rate for a computer is $40 an hour. There is, however, an overnight fee of $10 for every night the computer is kept in our possession, after the repair is completed. We notify you after we have completed the service, and for every day that passes, you incur this extra fee.

I am just utilizing random numbers on the example sentences, but I hope they help clarify usage.

Solution 2:

Premium. You are asking the customer to pay for premium services or merchandise.

"The Stonywood neighborhood is highly desirable so houses sell at a premium." (See Collins Dictionary https://www.collinsdictionary.com/us/dictionary/english/at-a-premium )

TurboTax sells a "premium services bundle" at https://ttlc.intuit.com/questions/2204687-what-is-the-premium-services-bundle (Note: not a product recommendation, just a usage example.)

Solution 3:

Markup refers to how the supplier fixes the price before the customer sees it, while surcharge suggests an extra charge for accommodating a demand from the customer that the supplier does not particularly want to encourage. It is unlikely that a single word is ideal here. However, if you use two words, you are spoilt for choice: extra charge, additional charge, supplementary charge, and so on.