Withholding

Why it was introduced

Collecting tax from a large number of individuals after the fact is expensive and unreliable. Collecting it from a much smaller number of employers and payers, at the moment money changes hands, is neither. Withholding moved the administrative burden to the party best able to carry it and raised collection rates dramatically wherever it was adopted.

It also solved a timing problem for governments, which spend continuously and would otherwise receive revenue in an annual lump. A withheld tax arrives in step with the activity that generates it.

What it changes for the payer

For the person being paid, withholding changes the psychology of taxation more than the arithmetic. Money that never arrives is not experienced as money surrendered, which is a genuine and much-discussed effect: the same total charge feels different depending on whether it is deducted quietly or demanded openly.

It also changes the shape of any correction. Because withholding uses expected figures rather than final ones, the amount taken during a period is an approximation, and the final position is settled afterwards. Over-deduction and under-deduction are ordinary features of the mechanism rather than signs that something has gone wrong.