Harrow is in the top five London authorities for collecting council tax, according to new figures.
Government statistics revealed the borough came joint fifth with Bromley.
In 2007/08 Harrow collected £103.7million out of a potential £106.9m after sending out more than 80,000 bills to residents. Only Kingston, Sutton, City of London and Richmond were ahead in the survey, which featured all of London's 33 boroughs.
Council leader David Ashton said: "These figures show Harrow is more efficient than the vast majority of London boroughs in collecting the council tax."
The council believes its high rating is because of its rigorous vetting of people who apply for discounts and exemptions, as well as its recovery policy, which ensures action happens quickly when fraud occurs.
The council currently has arrears of £6.6m and is continuing to trace non-payers through a combination of court action and private agencies.