at source

chiefly Brit. at the point of origin or issue

reduction of pollution at source

■ used to show that an amount is deducted from earnings or other payments before they are made

your pension contribution will be deducted at source

* * *

at ˈsource idiom

at the place or the point that sth comes from or begins

•

Is your salary taxed at source

(= by your employer)

?

•

It is better to deal with such problems at source.

Main entry: ↑source_idiom