N.Y.C. Admin. Code § 13-311: § 13-311 Time of payment of pensions.

All pensions and allowances payable out of the fire department pension fund pursuant to the provisions of this subchapter shall be paid in equal monthly installments, each one-twelfth, in amount, of the sum allowed as the annual pension or allowance or in ratably smaller amounts when the benefit begins after the first day of the month or ends before the last day of the month.