lump sum
noun [ C, usually singular ]
FINANCE ukus(also lump)an amount of money that is paid in one large payment on one occasion:
She received a lump sum of €70,507 when she retired.
be paid/taken as a lump sum The entire amount can be taken as a lump sum.
If the pension is small, it may be paid as a one-off lump sum payment at age 65.