The social media giant went dark for many users Wednesday afternoon, though it was back for most within about 20 minutes.
"Earlier today we encountered an error while making an infrastructure configuration change that briefly made it difficult for people to access Facebook. We immediately discovered the issue and fixed it, and everyone should now be able to connect," a spokesman said in a statement.
The status page for Facebook developers did not show any anomalies, though the data appeared to have been last updated prior to the outage.
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In its most recent quarter, Facebook reported revenue of $2.91 billion. That works out to $22,453.70 of revenue per minute - implying a 20-minute outage could cost the company nearly half a million dollars.
The viral reaction to Facebook's outage was almost instant on Twitter, as a number of brands tried to capitalize on the news in their favor.