A leaked memo to the Guardian revealed that the BBC will have to reduce its coverage of other major events in the wake of the Chilean miners rescue.
A note sent to executives by the Beeb’s world news editor Jon Williams said reporting the story had cost over £100,000.
Coverage of G20 and Nato summitswill be affected as a result, along with the Davos World Economic Forum, the Cancun climate summit and the Oscars.
BBC News sent 26 journalists to report from Chile, pushing the annual budget into the red.
“The financial situation is serious,” Williams said. “We are currently £67,000 beyond our agreed overspend of £500,000; newsgathering’s costs for Chile will exceed £100,000.”
Williams said that meant “consequences for other events in the coming months”.
They include sending either the BBC political editor, Nick Robinson, or business editor, Robert Peston, to the G20, but not both. “We will scale back editor deployments to the G20 – so either Robert or Nick, not both,” Williams wrote.
The BBC will also send just one correspondent to cover the Cancún climate summit.