The de Blasio administration has failed to make its last two payments to the NYPD pension fund.

“We contacted the NYPD payroll section and were informed that the failure to make the payments was due to an insufficiency in budgeted funds,” Patrolmen’s Benevolent Association president Patrick Lynch wrote in a July 21 letter to city Labor Relations Commissioner Robert Linn.

It’s the first time the city hasn’t forked over the money, which amounts to $522 per active PBA member annually or around $1.8 million overall.

According to its current budget plan, the city’s annual general reserve is $1 billion. Lynch argued that whether the money is available or not, the city is obligated to cough up the cash according to its collective bargaining agreement with the police union.

Lynch went on to demand payment, plus 9 percent interest.

NYPD spokesman Peter Donald said he did not know exactly why the payments were not made, but promised that “all the money is going to be there by Tuesday.”