The de Blasio administration announced late on Thursday that it now anticipated spending over $1.3 billion more than it had originally forecast in the current budget, part of an annual recalibration of spending and revenue in New York City that takes place each November.

The November financial plan update, as it is known, highlighted other notable changes to account for short-term and longer-term issues: $52 million in new spending for homeless shelters, added since the budget was adopted by the City Council in June; millions more to offset pension fund underperformance; and a reduction in projected tax revenues, down by $127 million for the 2017 fiscal year.

The plan also included $6.5 million in new spending by the Law Department for the hiring of outside lawyers to handle the myriad state and federal investigations that are said to focus on whether Mayor Bill de Blasio, a Democrat, or members of his administration traded favorable official actions for donations.

At the same time, the city’s already historically high head count grew in the forecast of city budget officials: It is now expected to exceed 300,000 full-time employees by June, not counting the tens of thousands of additional part-time workers on the city payroll.