Three-quarters of bankers will get big bonuses this year, the protesters claim
About 30 anti-poverty campaigners have been ejected from the RBS offices in the City after staging a protest against the bonuses paid to bankers.
The demonstrators handed out leaflets and unfurled banners with slogans such as "you owe us".
It was "unacceptable" that many staff continued to receive "obscene" sums when so many people were homeless, their spokeswoman said.
Security guards removed them from the building on Bishopsgate.
"For the vast majority of us this Christmas will be more difficult than most," spokeswoman Ellie Schling said.
"But the majority of bankers will again be receiving obscene amounts of money in Christmas bonuses, and to make it worse, it's our money they're getting this year."
She accused the government of supporting bankers while "turning a blind eye to the tens of thousands of people left homeless due to inadequate social housing".
"We need to stand up to the banks and the government and tell them this is unacceptable," Ms Schling added.
The government purchased a 58% stake in RBS as part of its rescue package for banks affected by the economic downturn.
The company, formerly known as the Royal Bank of Scotland, is the UK's fifth-largest mortgage lender and has been in existence for nearly three centuries.