The Congressional Budget Office has scored the Senate's immigration reform bill, and the news is pretty good for deficit hawks. According to CBO estimates, the bill would:
Compared to its baseline estimates, CBO also projects that if the immigration bill is passed, GDP will increase a bit over the next decade; wages will go down a bit but then rise in the decade after that; capital investment will rise; and the productivity of labor and of capital will go up. All of these effects are fairly small, however. Economically, a pretty reasonable takeaway is that immigration reform would probably have a positive effect, but not a large one.