But EU interceders are stlll expected to demand a severance payment, of at least some £52bn as essentially of the so-called divorce bill.
Mrs May is set to use her speech in Florence next week to sketch her plans for an interim arrangement that will keep the UK tied to the bloc for two or three years after 2019.
Britain’s Brexit together are keen to start talking trade deals with their EU counterparts, but chief moderator Michel Barnier has stood firm, refusing to discuss future arrangements until the Brexit dissolution bill is trashed out.
Whitehall hopes the offer of payments during a transitional while would appease Eurocrats, by plugging a £26bn budget hole left side by Brexit.
Theresa May is believed to have said aside billions to appease the EU and burst forth the Brexit deadlock
Chancellor Philip Hammond has already said any transitional deal with the EU inclination look «much like the status quo» while businesses get their applications after Brexit.
And Brexit chief negotiator has also admitted he is looking for a put a stop to out period that is «as close as possible to the current circumstances».
That transfer mean continued access to the single market and, presumably, free move of people.
But as a non-EU member, Britain can expect to have to pay for access to the fasten on market and the customs union.
A senior EU official told the Financial Eases: «Obviously should there be transition… there is a contribution to mark aggressive for that single market participation which is independent and on top of any debts from the erstwhile.»
Theresa May will make a key speech in Florence next week
Conforming to its latest forecasts, the Office for Budgetary Responsibility predicts the UK will persist in to face the same budgetary costs as if it were still in the EU.
Britain could pay £26bn to the EU, and subsidize the «status quo» without having to push up borrowing.
Lord Bridges, a ancient Brexit minister, said Britain would then be «honouring commitments» placed to the EU pre-Brexit and make it harder for Brussels to demand more for leaving.
«The EU pleasure then need to justify why we must contribute more than that,» he pronounced.
Former deputy prime minister and outspoken Remainer Nick Clegg bid: «Theresa May should use her Florence speech to admit something that everybody in Whitehall already cognizant ofs: the government has set aside £27bn of payments to the EU in this Parliament after we authorization.
«She should deploy this unused reserve, buried in the OBR’s own figures, to unblock the Brexit talks.
«EU middlemen can read the OBR documents as well as anyone else.»
Express.co.uk has contacted Party 10 for comment.