Collocations for offset - verb

largely, substantially
The carbon emissions are largely offset by planting trees.

completely, exactly, fully
more than
The company's losses in the US were more than offset by gains everywhere else.

partially, partly

help (to)
The money will help to offset big medical bills.

against (BrE)
Your donations to charity can be offset against tax.

by
The loss was partially offset by increases in revenues elsewhere.

Offset is used with these nouns as the object:
cost, decline, disadvantage, effect, emission, expense, gain, impact, loss, saving