The phrase "one off discount" is correct and usable in written English. You can use it to refer to a discount that is only available once. For example, "We are offering a one off discount of 10% off your first purchase.".
The one-off discount day, which turned out to be a bigger success online that on high streets this year, saw the company record its best ever day of trading, and James said the website did not crash or have to rely on a queuing system like last year.
It said this was in response to feedback from customers, many of whom would prefer Asda cut the price of food and drink rather than offer one-off discounts on electrical items.
Festivities vary according to the store, with special commemorative releases, one-off discounts and free pizza being popular choices.
Make no mistake folks: even with a half-off discount in tow, the new Infiniti deal is one of the most expensive Gilt has ever offered.
Options are likely to be spelt out, including the possibility of full repayment over a longer time, of 10 or 15 years, or a one-off upfront payment at a significant discount to the money owed.
McBain was never one to discount that.
His inventory included papier-mâché versions of coffee-shop menu choices — fried eggs, burgers, pie slices — as well as one-off editions of off-the-rack discount-store clothes, from men's jackets to women's lingerie.
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