notional
adjective
uk/ˈnəʊʃənəl/ usexisting only as an idea, or as an approximate amount:
Diamonds only retain their notional value through strict control of the market.
Almost everyone will have to pay a higher tax bill than the notional amount suggested by the government.
They are converting debt into enough shares at a notional 8.6p each to give them 60% of the equity.