The Government must demonstrate that British aid is "not lining the pockets of Mercedes-driving leaders", according to Farm-Africa.
Calls on the leaders of the G8 for more aid will not bring about real change unless accountability is made a top priority, the NGO is to claim today at its AGM.
"I want to see the people of Africa, not their rulers, benefit from more and better targeted aid," said chief executive Christie Peacock.
"We need to satisfy British taxpayers that aid is going to the grassroots where it is needed most, and not lining the pockets of Mercedes-driving leaders."
Speaking before Farm-Africa's 20th anniversary AGM, Peacock said the British Government needed to introduce a system to demonstrate where its aid was going, "just as NGOs have to do with their money".
She called for aid to be earmarked for specific sectors such as health and agriculture and for more money to be given through civil society organisations, rather than just through multilateral agencies and governments.