Public debt in an independent Scotland could exceed national income by the early 2030s, according to projections by the IFS.
A new report found that in order to avoid this, Scotland would need to implement "significant additional fiscal tightening".
Even under the most optimistic scenario we consider, the long-run 'fiscal gap' in Scotland would be 1.9% of national income compared to 0.8% of national income for the UK as a whole.
In order to bring debt down to 40 percent of national income over the next 50 years, it would need to increase taxes or make cuts worth £6 billion in today’s terms.
More top news
A hacker group who claimed to be behind a cyber attack on Sony Pictures have posted a message online apparently mocking the FBI.
The returns of Benedict Cumberbatch's detective and the X Factor judge were among 2014's most tweeted TV moments in a billion conversations.
A family has issued an appeal to help find their missing pet turkey - in case he gets gobbled up as someone's Christmas dinner.