The estimated cost of buying a new national ID card has risen again to £93.
Home Office documents confirmed the previous best guess of £88 had not included VAT and other extras.
As the Identity Card Bill was re-published after it fell at the end of the last Parliament, the average annual cost to the nation for issuing the controversial cards alongside passports was put at £584 million.
The £93 charge would eventually be imposed on every British adult for their passport and a new "biometric" identity card, carrying details such as fingerprints.
During Prime Minister's Questions, Tony Blair told MPs that identity fraud cost Britain "billions" every year.
He said the Conservative leader Michael Howard had previously backed the introduction of ID cards and urged him to vote for the new plans.
Previously, the Tories have said they would join the Lib Dems in opposing ID cards until the Government had proved "conclusively" that they were needed.
Liberty's Shami Chakrabarti said the bill was "re-hashed" and urged MPs to reject it again because it was not a "rational" policy.
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