The astonishing admission is yet another huge body-blow to Nicola Sturgeon's attempts to break away from the UK.
If the country ever voted to become independent the Scottish Government would need to find the huge sum in order to hold in a foreign reserve fund, according to the study by pro-independence group, Common Weal.
Researchers claim £10 billion would be a "significant sum" to raise but "not an insurmountable one", suggesting Scotland could acquire a share of the UK's foreign reserve as part of any separation agreement.
However, critics have said the introduction of a separate currency would be "disastrous" for the Scottish economy and have even branded the suggestion "totally unrealistic".
Last night, the Scottish Conservative's shadow cabinet secretary for finance, Murdo Fraser was dismissive of the Nationalists' independence hopes.
He said: "It would be disastrous for our economy and public finances if Scotland had to find £10 billion to adopt a separate currency. "Finding such reserves is totally unrealistic. It's time that independence campaigners recognised this fact and put a stop to their constant drive for separation. A second referendum is not what Scotland needs nor wants and this report only further enhances this view."