That's according to doddl.ie
Homeowners throughout Co. Kildare could save up to €4,000 a year by switching their mortgage provider.
That's the sum that doddl.ie estimates most homeowners are over-paying, annually.
That could amount to €100,000 over the life-time of a 25 year mortgage.
There are over 30,000 mortgaged homes in Co. Kildare.
Martina Hennessy is Managing Director at doddl.ie.
She joined Clem Ryan on Tuesday's edition of Kildare Today.

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New Cultural Programme Set For Castletown House
Celbridge Woman Who Lost Sister To CF Calls For People To Support Today's Fundraiser
Protestors, Including Kildare's John Dallon, Refused Entry From Government And Agriculture Bodies Meeting
Defence Forces Travelling To The Curragh Today For Training
Newbridge Silverware’s Silver-plated Cutlery Factory Officially Closes
Martin Heydon Will Meet Farming And Haulier Groups This Morning Amid Fuel Protests
Missing 17-Year-Old Joshua Treacy From Maynooth Has Been Located