A Company which qualifies as a base rate entity will have failed tax rates during the year of operation. 

Income YearBase rate entity tax rate
2018-1927.5%
2019/2027.5%
2020/21
26%
2021/22
25%

For the entire period of the loss carry-back tax offset, a company qualifies as a base rate entity  is their aggregated turnover is below $50M.

An opportunity to receive a refundable tax offset at 27.5% or 26% in the loss year will achieve a better economic result than carrying losses forward.