The purchase, made through its parent GUS, moves Experian further into the consumer sector.
allows US and Canadian consumers to save by comparing prices on insurance, mortgages, credit cards, loans and phone and internet services. It also offers a bill monitoring and management service.
Don Robert, chief executive of Experian, said that Experian could launch a similar online price comparison service in the UK next year.
He said: "Our interactive strategy is for Experian to become the online leader in delivering all sorts of products and information to consumers around key events in their lives such as when they buy a house, a car or pay for college."
In the UK, the company is predominantly active in business-to-business financial information and marketing data.
However, it does offer consumer services, including the Credit Expert online credit checker and the Unclaimed Assets Register, a database of unclaimed life policies, pensions and shares. It offers a car-data checking service via the AA.
If Experian launches a price comparison site into the UK market it will go up against sites such as Moneysupermarket.com, Moneyexpert.com and Thisismoney.co.uk.
According to statistics from Hitwise, Moneysupermarket.com dominates traffic in the financial comparison sector with a 54.9% share of visits. It is followed by Moneyextra.com with 14.6% and uSwitch.com with 12.7%.
Experian said that Lowermybills.com would immediately enhance its earnings.
Speculation continues that Experian could be demerged from GUS, which also owns Argos, Homebase and a controlling stake in Burberry.
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