uneconomical
adjective
(alsouneconomic)uk/ˌʌniːkəˈnɒmɪkəl/ususing too muchmoneyor too manyresourcesandunlikelyto make aprofit:
Ethanolproducersareseeingtheirprofitmarginssqueezedandproductionmay wellbecomeuneconomical.
(it is) uneconomical to do sthWithoilpriceshigh,companieshave beenreturningtoreservesthat were uneconomical toextractduring theyearsoflowprices.