lump sum; one-off payment
A single payment made at one time, as opposed to installments or recurring payments. Common in contexts like retirement allowances, settlements, or special grants.
I received a lump sum payment upon retirement.
I covered the medical expenses with a one-off insurance payment.
Specifically a bonus payment, often used in corporate settings for one-time special bonuses distinct from regular salary or seasonal bonuses.
The company paid a bonus based on performance.
I received three million yen as a lump-sum payment upon retirement.
Because the company performed well, a special bonus was paid out to the employees.
The company paid a lump-sum settlement to the accident victim.