MPs are being offered free online accounting software so they can publish their accounts on the web.
Clear Books said it hoped the move would lead to a quicker and more transparent solution to MPs' expenses.
MPs' expenses caused uproar last year after it was revealed some MPs were claiming everything from mortgages on second homes to toilet seats as expenses, and tax payers were footing the bill.
Tim Fouracre, MD at Clear Books, said: "The announcement that MPs have to pay £1.12m back has inspired us to help clear up what Nick Clegg referred to as a rotten Parliament. We are laying down the gauntlet to MPs who need to step up and show us how open they are really willing to be."
"With the Legg report itself costing an alleged £1.16m, this will save the taxpayer further expense as Parliament will not need to develop their own system."
Fouracre said the move would finally give the public access to detailed financial data with all MPs' expenses categorised.
"Our accounting software is online so it is the perfect platform for serving up this data to the general public."