"We will seek funds from NRIs, not UK citizens," said Redij-Gill, alluding to the controversy over alleged foreign corporate funding of the BJP and Congress.
All payments would be made online.
The party was trying to change the way politics was done in India, he said.
"We don't want someone's million pounds in anticipation of something to be given to them in the future."
AAP UK launched on Republic Day at Tavistock Square park, which has London's biggest and oldest statue of Mahatma Gandhi.
Redij-Gill said the parent party was aware of the plans, adding, "We are in synch with them."
He is among a growing number of relatively recent Indian immigrants - mostly students and professionals - who have been organising anti-corruption marches in Britain.
"Party constitution permits setting-up of overseas units. The UK chapter has informed us that would be collecting funds from NRIs," AAP chief spokesperson Manish Sisodia said in Lucknow.
All details would be displayed on the party's website, he said.
With HTC inputs