Günther Oettinger said the alliance should either spend less or find new cash to fill the crevice, proportionate to an expected 16% of the whole spending plan.
Among the alternatives on the table could be less liberal installments to agriculturists or an assessment on budgetary exchanges.
“A major nation, a net benefactor is leaving,” Mr Oettinger said.
“That must have results.”
Mr Oettinger said every euro spent must positively affect individuals’ lives, as he introduced a talk paper on the EU’s future.
Transactions are under path for the UK to leave the EU before the finish of March 2019, after a year ago’s choice vote.
It is not simply Brexit giving the EU a spending migraine.
“In the meantime we have to back new assignments, for example, safeguard, inside security…,” Mr Oettinger composes, with provincial strategy Chief Corina Cretu, in an EU blog.
“The aggregate hole could subsequently be up to twice to such an extent.”
The refund, consulted under previous Prime Minister Margaret Thatcher, is a perplexing figuring which sees a sizeable extent of the UK’s net commitment to the EU every year returned.
Authorities will now counsel part states and the European Parliament, our correspondent says,
They trust the “Brexit impact” will be clearer before the year’s over and a draft spending plan for the years 2020 and past will be proposed by the center of one year from now.