Impaired losses during the third quarter totalled £3.4bn, including £404m in its UK retail business, £187m in its UK corporate business and £1m in its wealth unit.
Other impaired losses include £144m for Ulster Bank and £180m for its retail and commercial business in the US.
RBS reduced lending by £5.3bn to £588bn during the third quarter, but recorded an operating profit of £1.2bn for its core banking activities, but an impaired loss of £1.2bn.
This week RBS announced its participation in the asset protection scheme under revised terms, which include a change to fee arrangements, a reduction in the overall asset pool and a higher first loss piece
Government also confirmed this week that RBS and Lloyds Banking Group will be broken up and parts sold on to new players in the market.