A package to extend expired tax breaks may get enacted this year, with one option being the must-pass spending bill negotiators are trying to complete by next month, Senate Republican Whip John Thune told Bloomberg Government.

Thune said tax extenders might get attached to the spending package if negotiators also decide to take on matters such as extending the federal debt limit or raising the budget caps for two more years

“If the scope of these discussions widens, and if the talks go that way, then tax extenders could be an inducement for somebody,” Thune (R-S.D.) said.

Senate Finance Committee...