The phrase "a bonus check" is correct and usable in written English.
You can use it when referring to an additional payment received, typically as a reward for good performance or as an incentive.
Example: "After a successful quarter, the employees were thrilled to receive a bonus check in their next paycheck."
Alternatives: "extra payment" or "incentive check".
Mr. Kassab received a bonus check of only $2,000.
When Cantor sent her a bonus check months later, she called Cantor, saying her husband deserved more.
Long handed him a bonus check for ten thousand dollars and the kind of boxer's belt that heavyweight champs wear.
Mrs. Sanders had received a bonus check for fifty dollars, which was the amount she planned to spend for the present.
Using a bonus check from his job, and office space donated by a tailor in his apartment building in the West 40's, Mr. Ross, along with his younger cousin, Redick Edwards, began shooting the Upper East Side last year.
With a bonus check from the I.R.S. practically in the mail, taxpayers around the country were already talking today about how they would spend the tax cut that Congress passed on Saturday.
But, when you incentivize a sales person with a hefty bonus check based on the number of prescriptions emanating from their territory, they'll find a way to get doctors to write their drug.
A fellow from Capitol came to us with a large bonus check and said, 'Here, you're folk singers.' We said, "You bet your" -- naughty word deleted -- "we are".
In fact, thanks to a generous bonus check from Bloomberg, Tusk was able to start a consultancy in 2010 that helps Fortune 500 companies launch political-style campaigns to achieve a particular end.
That kind of salvation does not come from Mark Zuckerberg or Steve Ballmer saying, "OK, I'll write a $2 million bonus check to the IRS".
On Wall Street, few people quit their jobs late in the year because the bulk of their annual pay comes in a single bonus check early in the next calendar year.
