zero-ratehttp://www.oed.com/dictionary/zero-rate_v%3Ftab%3Dmeaning_and_usezero-rate, v.
Revised 2018

zero-rateverb

  1. 1972–
    transitive to assess (a product or service) for value added tax or other sales tax at a rate of zero.
    1. 1972
      Zero-rating a transaction, rather than exempting it, is advantageous, because a trader is allowed credit for any VAT paid on his inputs.
      Daily Telegraph 22 March 19/3
    2. 1990
      If distributional objectives are the only justification for zero rating goods, these objectives can better be achieved through the social security system.
      Taxation & Environmental Policy (IFS Commentary No. 19) 10
    3. 2011
      The proposal to zero-rate books would benefit upper-to-high income groups instead of the poor.
      Mercury (South Africa) (Nexis) 28 March 8

Originally published as part of the entry for zero, n. & adj.

zero, n. & adj. was revised in June 2018.