The bank lent £18.7bn to mortgage borrowers in 2010.
In Q4 2010 RBS retained its 11% market share but gross lending volumes plummeted 17% on Q3 to £4.4bn.
The bank blames a weak market in the final quarter of last year for the drop in annual gross lending figures.
First-time buyers made up 16% of the bank’s lending in Q4.
Net lending also increased by £1.8bn in the quarter bringing the annual total to £8.8bn.